Associate Dean of Studies and Associate Professor of International Relations at Boston University’s Frederick S
has been invited to co-chair the European Union seminar at Harvard’s Minda de Gunzburg Center for European Studies
The European Union Seminar examines central social
and political issues of the European Union
It covers topics such as institutional developments
and the EU’s policy on Ukraine and its security policy in European
Professor Schilde joins a distinguished group of co-chairs
The seminar’s upcoming sessions will focus on timely issues affecting the EU
The first session on September 19 will address the impact of the far right on foreign policy in the EU
featuring Andrew Moravcsik of Princeton University as the speaker and Daniel Ziblatt as the discussant
Future sessions will explore the EU’s security policy in response to the Ukraine war
the EU’s increasing role as a state actor
and the challenges of Ukraine’s potential EU membership and EU enlargement
This appointment aligns with Professor Schilde’s expertise as the EU Jean Monnet Chair of European Security at Boston University and her role as Global Fellow at the Wilson Center
For more information about the European Union Seminar, visit the Center for European Studies website: https://ces.fas.harvard.edu/study-groups/000042-the-european-union-study-group
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Esther Norman passed away peacefully on April 24
She will be remembered and sadly missed by her loving daughter Susan (Tom) Klassen
as well as by her many dear friends whom she loved as family
She is survived by her brother Siegfried Schilde
Esther was predeceased by her husband Edward Walter Norman in 1968 and by Waldemar Krzanowski in 1996
BC and moved to the Lower Mainland with her Husband Edward
BC and worked as the Head of Housekeeping at the Squamish General Hospital
She and Walter moved to the Okanagan and then to Oliver when they retired in 1991
Esther has been living on an acreage in Oliver with her brother Siegfried
She did all of these things even when she became visually impaired
We all benefited from her beautiful and tasty creations that were made for us with love
Esther's family would like to send special thanks to the staff of McKinney Place in Oliver
BC for the care and compassion and the sense of family that they provided for her
A Celebration of Life will be held when we are able to gather again
Memorial tributes can be made to a charity or an animal rescue of your choice
Please visit these standalone sites for more information
GE Aerospace | GE Vernova | GE HealthCare
located in the Belgian province of Antwerp
will be the first in Europe to use the new ZeeLung MABR technology
GE’s Water & Process Technologies offers a hybrid system in which 50 percent of the wastewater is treated by ZeeWeed 500D MBR
and the remaining flow of 8 million liters per day is treated by a conventional activated sludge system
Adding ZeeLung MABR to the plant will enable improved total nitrogen removal in the conventional activated sludge stream
The plant was originally designed for the treatment of 28,000 population equivalents (both hydraulic and biologic capacity)
The actual load of the Schilde Wastewater Treatment Plant has
gradually increased to 35,000 population equivalents
biological treatment capacity was increased by extending membrane capacity of the MBR (so it can handle more flow) and installing post-denitrification sand filters on the effluent of the conventional activated sludge system
“Using ZeeLung and ZeeWeed together for the expansion of the Schilde Wastewater Treatment Plant will allow Aquafin to complete the upgrade with minimal modifications and with no need to build new tankage
they will be able to meet the new annual total nitrogen removal consent,” said Alain Mineur
The Schilde Wastewater Treatment Plant is the largest municipal hybrid MBR system in Flanders
and the upgrade is being completed by KAMPS SA
After the expansion is complete in the first quarter of 2017
the plant will have 65 percent total nitrogen removal
“Water & Process Technologies’ hybrid solution of ZeeLung and ZeeWeed was about meeting an effluent specification within the plant’s existing footprint
The Schilde Wastewater Treatment Plant needed to be upgraded to increase its nutrient removal ability
the plant will have lower energy consumption,” said Kevin Cassidy
engineered systems-GE’s Water & Process Technologies
“The project is the first application of our new ZeeLung technology in Europe
ZeeLung MABR technology is a simple solution that allows municipalities to achieve nutrient removal and/or capacity expansion in existing tank volumes while significantly reducing energy consumption
It employs an innovative gas transfer membrane to deliver oxygen to a biofilm that is attached to the membrane surface
Immersing ZeeLung cassettes into mixed liquor increases the inventory of biomass in a treatment system thereby intensifying the biological treatment process
Oxygen is delivered to the biofilm by diffusion through the membrane
which reduces the energy required for oxygen delivery by up to four times compared to conventional aeration
With operations in 130 countries and employing over 7,500 people worldwide
GE’s Water & Process Technologies applies its innovations
expertise and global capabilities to solve customers’ toughest water and process challenges
It offers a comprehensive set of chemical and equipment solutions
Water & Process Technologies strives to enable customers to meet increasing demands for clean water
strengthen environmental stewardship and comply with regulatory requirements
* Trademark of General Electric Company; may be registered in one or more countries
Beth CoffmanSoteryx Corporation [email protected] +1 518 886 1076
Belgian Wastewater Treatment Plant First in Europe to Use ZeeLung* Technology
Pardee School of Global Studies at Boston University is pleased to announce the appointment of Kaija Schilde
Associate Professor of International Relations and Jean Monnet Chair in European Security
Schilde, an expert in the political economy of transatlantic security, brings a wealth of experience to her new position. She is the author of “The Political Economy of European Security” (Cambridge University Press, 2017) and has contributed extensively to scholarly articles on security themes
Serving as a faculty member at Pardee since 2010
Schilde has demonstrated exceptional citizenship within both the School and the University
Currently, Schilde serves as the director of Pardee’s Center for the Study of Europe
where she has played a pivotal role in advancing the Center’s mission to foster a deeper understanding of Europe through interdisciplinary frameworks
The School expresses gratitude for Schilde’s dedication to the Center for the Study of Europe over the past three years
A successor for the role of CSE Director will be announced later in the spring
who has served as the School’s inaugural Associate Dean for Studies since 2020
Selin’s tenure has been characterized by his remarkable leadership
and invaluable contributions to academic programs
The School extends its deepest appreciation to Selin for his service and warmly welcomes Schilde as the new Associate Dean for Studies
Dean Scott Taylor expressed his confidence in Schilde’s ability to excel in her new role
“Kaija’s extensive expertise and commitment to academic excellence make her the ideal candidate to lead our studies program
We are thrilled to have her join our leadership team.”
Tagged: Center for the Study of Europe, kaija schilde
This as-told-to essay is based on a conversation with Andrea Schilde and her husband Eli Karplus
who left their full-time jobs in the US to travel to more than a dozen countries with their son
and my 22-year career was in software development
it's not always easy to keep the right balance
We both worked in demanding and fast-paced environments
which took a toll on our time and health over the years
The pandemic allowed us to spend more time together as a family
We ended up selling our house in Boulder before starting our travels
We considered renting out the house while traveling
but with our older kids grown up and in college
that we noticed our son Finn was excelling in his studies
Finn is now in fourth grade and he learns well online
Our school district in Boulder offers an online classroom with a semi-asynchronous curriculum that we thought would be a perfect match for the kind of traveling we wanted to do
We had access to a great education platform to make sure that Finn has a regular
but he had the flexibility to do the work on whichever day and time that made sense for him.
Finn gets between 15 and 20 assignments in a week
and has an online platform to message his teacher
Facebook is the best place to find work and school communities
and activities for travelers to be part of.
When we visited Luxor in Egypt, Finn attended his first WorldSchool Hub — a place where other traveling families come together to find community and where kids learn new things in a different setting
It's completely different than school as we know it
learned about irrigation and how the Nile gave Egypt life
Sometimes we compromise with the teachers on assignments
We ask Finn to drop his teacher a note and tell them what he learned that day
and that typically counts as some of the assignments.
Finn was excited about the prospect of adventure
far-off places that he had heard about and read about
he struggled with missing friends back home
and never passed up a chance to interact with kids or grownups
whatever language they might speak.
We use the website TrustedHousesitters to connect with homeowners all around the world
House and dog sitting is a wonderful way to live in new places and meet great people
the kids are going to destroy our house." But we've found that there are like-minded families all around the world
and also share photos of the house that we sold
We hope that this can help them connect with us and feel we are trustworthy.
The homeowners know that their dog and their house are in good hands
it's such a great way to save money on the road
Housesitting is different from being in a hotel
and it gives a homey feeling compared to an Airbnb
We love meeting wonderful people and it's such an honor for someone to trust us and share their homes and pets with us
especially when we currently don't have one of our own
There are three main expenses to watch out for — food
Most places we've traveled to can afford us a lifestyle that's cheaper than the one we were living in the US
There have been places where we have to spend $2,000 to $3,000 a month on accommodation
There are also ways to save money on accommodation in more expensive places apart from housesitting
Choosing accommodations that are smaller and further from the city center helps
because other types of rentals were so expensive there.
we took the discount train when traveling around Europe
The less you move around and the slower you travel
the cheaper it gets because you don't have to spend as much with airfares
There are several things that can break the budget
like traveling between countries in a short amount of time
Longer stays in a single location where we can slow our roll
One misconception is that the world is full of dangerous places and people
What we have found is that there are a lot of really friendly
When you take yourself off of auto pilot and leave your comfort zone behind
Every new destination offers us a leap into a new life — new environment
Finn had reservations and worries about missing our dog and his good friends in the neighborhood
he has come to value connection with others
We initially planned to travel for around 18 months to about two years
But we've yet to decide whether we'll travel for longer and perhaps even explore the idea of working remotely while traveling the world
experts will dig deep into a single issue happening in the world to help you better understand it
the European Commission released its first-ever defense industrial strategy
long-term vision to achieve defence industrial readiness in the European Union” in the face of “Russia’s unjustified war of aggression against Ukraine.” We asked top experts on the European defense industry to weigh in on the strategy and how effective
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With a bit of lucky you don’t live very far and were born under a lucky star
while it may look like a run-of-the mill local bistro
Le Petit Panisse has been creating the buzz since a few weeks amongst gourmets
who make a beeline to come here from all over Paris
the arrival of new chef Jeff Schilde (ex Dame Jane) has changed things in this charming restaurant dating back to the 30s
with a typical Parisian decor worth of an Amélie Poulain remake
covered with tatooes imposes his colourful style
A stunning oriental terrine with merguez mint oil (€10)
green asparagus with smoked scarmoza (Italian cheese) lemon sauce (€12)
tartare and fries twisted with combawa (citrus fruit) (€18)
Classic bistro fare as you have never tasted
washed down by natural wines from a handful of producers (5€ per glass)
Jeff starts at the bottom for each service
a wild glazed red orange tiramisu and a Fontainebleau cream of lemon—infinitely sweet
The plus: lhe old fashioned terrace where you can drink until closing time
Also check out Chez Justine, the buzzing restaurant and the Frenchie wine bar
Bacha: a coffee shop worthy of the 1,001 nights
Where to Indulge in an Insane Strawberry Tart
Three New Italian Restaurants to Try Right Away
The creations of Paris's best chocolatiers for easter
5 Grand Gourmet Luxuries to Treat Yourself to… for Less Than 40 €
The new Michelin-starred restaurants to try in Paris
Where to take a cool and stylish pastry class in Paris
5 new adventurous tables in the heart of Paris
Our 5 Favorite Bouillons for a Feast Without Breaking the Bank
Four new tables for friends to reserve as a group
Where to Have an Author's Breakfast in Paris
Where to Find the Best Carrot Cakes in Paris
The New Marine Table That Delights the Triangle d'Or
5 fresh new addresses in Saint-Germain-des-Prés
Where to book for a business lunch in Paris
Kapara launches the sexiest Israeli brunch in Paris
We Went Back for Lunch at Jòia by Hélène Darroze
Discover the Trendiest Cocktail Bars Reviving Paris
Hotels with rooftop that make our head spin in Paris
12 turn-key looks to be in the spotlight at a wedding
The 5 New Parisian Boutiques You Absolutely Need to Check Out
Glucose Goddess: Jessie Inchauspé's Revolutionary Method
The most beautiful committed florists in Paris on a short circuit
The concept store Merci opens a sublime 2nd space
What are the shoe trends for back to school
2016 (Junior): A career year for Steffen ended with an America East All-Conference nod thanks in part to her career-high four goals and ten points. Steffen scored goals against Vermont
with that final goal coming in the America East tournament. Her goal against Missouri State was the game-winner as well. Steffen''s work as a midfielder helped the Tigers hold opponents to just 1.68 goals per game
2015 (Sophomore): Steffen was a key contributor for the Tigers
starting 18 of 19 games for the team. She scored one goal against Missouri State and also assisted on goals against Saint Louis and VCU while working mostly in the midfield and dominating the possession game. In Pacific''s 2-1 victory over Cal
one of her four multi-shot games on the year. She also put up multiple shots against Saint Louis
2014 (Freshman): Steffen played in all 20 games and made 18 starts in her debut season with the Tigers
She averaged over 50 minutes per contest and tallied a goal and an assist on the year while attempting five shots
25 at Appalachian State and she added an assist against the Mountaineers on Nov
played for the Belgian national team at the U18 and U16 levels
earning a fifth place finish at the 2013 U18 European championships in Dublin
she and her team earned a runner-up position at the 2012 U16 championships in Valencia
Spain and a third place finish in the 2012 U16 Five Nations Tournament in Mannheim
Steffen has 10 years of club experience for the KHC Dragons of Brasschaat
including a second place finish in the European Hockey League in 2013.
In her free time she enjoys reading and going out with friends
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LADY LONGHORNS – Members of Dover’s 2021-22 high school basketball girls team include
DOVER LONGHORNS – Members of the 2021-22 Dover High School boys basketball team include
Emory Norton and Lance Dunigan; and back row
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Kaija Schilde
Associate Professor of International Relations at the Frederick S
Pardee School of Global Studies at Boston University
was quoted in a Center for American Progress article discussing defense policy in the European Union (EU)
In the article, titled “The Case for EU Defense,” authors Max Bergmann
and Siena Cicarelli argue that the EU – in forming a trans-national union – has weakened its collective military power
They go on to discuss how EU citizens cite increases in national defense spending as unnecessary for two reasons: the citizenships that needs protecting is that of the EU
it should fall on the EU to protect Europeans
the article continues to discuss how European citizens support increased defense spending at an EU level
The authors cite Schilde’s research on the matter – “A more martial Europe? Public opinion, permissive consensus, and EU defense policy” – which argues the “slow progress of integration in [defense] is due to the reluctance of elites rather than to the reticence of Europe’s citizens.” As the research shows
the European public strongly supports defense policy
but EU leaders have elected instead to rely on the United States for de facto subsidize its defense
‘The European public supports EU defence policy
and citizens hold consistent and well-developed attitudes on the topic.’ Furthermore
no other policy domain is as popular and robust as the idea of pooling national sovereignty over defence.’ The authors also argue that European support for EU defense is also not soft or the result of indifference or uninformed views
respondents understand what it means to have greater EU involvement and therefore have a clear sense of what they are preferring
The full article can be read on the Center for American Progress‘ website. Schilde’s article can be read online
Tagged: 2021, Defense, European Union, kaija schilde, security
marks the one-year anniversary of Russia’s invasion of Ukraine
The war’s impact around the world continues to be staggering and recent events show they might soon worsen
BU Today posed two key questions to the Pardee school scholars: if peace talks are not being considered
And what will the world look like when it’s over
While neither Lukes nor Schilde was particularly surprised by Russia’s invasion of Ukraine nearly a year ago, the damage it has caused and its impacts on the rest of the world are undeniable. In discussing the future of Ukraine, Schilde seemed cautiously optimistic. While there is no movement toward making Ukraine a member of the European Union (EU)
“Ukraine will become powerful as a tech leader
even though it will still be Russia’s neighbor…I don’t want to be overly optimistic
But I just don’t see a break from the embeddedness it’s already achieved.”
Both Lukes and Schilde argue that the Russian state is in a troubled state; however, Lukes thinks Russia could become a “more normal actor in the world” if not for President Vladimir Putin. As he puts it, he is the architect of this conflict who has threatened to escalate it further as the United States and other western allies encroach further
“as long as Putin is at the top of the pyramid of Russian power
viable solution that would be acceptable to him and the Ukrainians and their western allies.”
The full interview can be read on BU Today‘s website
as part of the Pardee School Research Seminar Series on April 23
The Political Economy of European Security draws on industry documents
and comparative political theory to demonstrate that interest groups can change the outcomes of developing political institutions because they provide sources of external capacity
which in turn can produce authority over time
mobilized interest groups often create informal institutions like think tanks or industry associations
and then those informal institutions provide the developing state with expertise
with external capacity that it didn’t otherwise have,” Schilde said
this means interest groups under certain conditions gave the EU a capacity it didn’t have that member states didn’t give it legally
So in some areas the EU is doing more with less
and that more is coming from informal institutions.”
Schilde said the book attempts to develop a better understanding of the relationship between private actors and international institutions in global governance as international institutions take on aspects of statehood once in the sole domain of nation states
The book explores how the presence of interest groups change EU governance outcomes
“When you think about interest groups normally you think about how they want laws change or how they want there to be a different regulation over something,” Schilde said
in state-building and in new political environments
they often can change institutions and how the rules of the game are formed if they are there in the beginning.”
The Political Economy of European Security was written to be of interest to scholars outside of EU studies in addition to policymakers and academics trying to understand the phenomenon of EU lobbying
It is intended to appeal in particular to non-governmental organizations keeping track of lobbying
influence and issues of corruption in EU affairs as data in the book allows for evaluation of the relationship between organized interest groups and EU policy authority
“I basically used a lot of theories of state-building and institutional change to talk about what the relationship is between private actors and a developing nascent public institution,” Schilde said
“I position myself in this way by talking about interest groups in Europe as those that might be doing more than just potentially lobbying for small policy changes.”
Schilde’s research interests involve European and transatlantic security, the political economy of defense and security markets and industries, EU lobbies and interest groups, and the role of private nonstate actors in national and international security. Learn more about her here.
The Center for the Study of Europe (CSE), an affiliated regional center at the Frederick S. Pardee School of Global Studies at Boston University, hosted a March 28, 2019 talk with Kaija Schilde
Pardee School Assistant Professor of International Relations
Schilde gave a talk entitled “Explaining EU Asymmetry: A Comparison of Borders and Asylum Policy Development,” that focused on why the EU coordinates on some policies but not others
She began by recognizing lack of coordination or harmonization not as a failure or aberration
and by reconsidering the EU as a political context of asymmetry and dynamism
Schilde also examined the uneven development of comparable policies complicating national sovereignty to consider what type of ex ante theorization could characterize the EU’s policy landscape not as problematic or malfunctional
defined by stable asymmetry and bifurcated agency
She considered three dimensions of asymmetry: power
Schilde identified the nexus of these asymmetries as accounting for bifurcated migration policy through comparative case study analysis
Extrapolating from migration as a representative policy area
she suggested a dynamic asymmetry approach explains uneven and arrested political development of the EU as purposeful and enduring
Kaija E. Schilde is Assistant Professor at the Boston University Pardee School of Global Studies
Her primary research interests involve the political economy of security and transatlantic security
The Political Economy of European Security (Cambridge University Press
2017) investigates the state-society relations between the EU and interest groups
with a particular focus on security and defense institutions
The mission of the Center for the Study of Europe is to promote understanding of Europe through its cultural heritage; its political
and philosophy; as well as through its recent emergence as a new kind of international form through the European Union (EU)
the center provides a focal point and institutional support for the study of Europe across Boston University through coordination of teaching missions
community-building among faculty and students
The Frederick S. Pardee School of Global Studies at Boston University would like to congratulate Kaija Schilde and Michael Woldemariam on their recent promotions to Associate Professors of International Relations
The promotions were approved by the President and Provost of Boston University
“I am delighted to congratulate Kaija Schilde and Michael Woldemariam on their tenure and promotions to Associate Professor,” said Pardee School Dean Adil Najam
“They have been prolific and productive members of our faculty
and I wish them both long and distinguished careers full of accolades and
carrying the Pardee flag high and proud.”
“I would like to thank my colleagues for their support and for creating a wonderful environment for teaching
and scholarship at the Pardee School,” Schilde said
“I’m deeply grateful to my colleagues at the Pardee School and throughout the university for their support,” Woldemariam said
“The Pardee School has been a fantastic place to grow as both an educator and a researcher
and I look forward to helping to take this institution to new heights in the coming years
I’m excited about the opportunities that lay ahead.”
these promotions and awards of tenure mark an especially proud moment for the BU community
as we’ve had the pleasure of watching these talented women and men develop from promising junior faculty into teachers and scholars of national impact and recognition,” said Boston University Provost and Chief Academic Officer Jean Morrison in her announcement of the promotions
Tagged: 2019, Associate Professor, kaija schilde, michael woldemariam, tenure
Kaija Schilde, Assistant Professor of International Relations at the Frederick S. Pardee School of Global Studies at Boston University, was selected from among 40 applicants to participate in a six-week summer fellowship at the Center for Teaching and Learning designed to inspire creative changes in classrooms across Boston University
The fellowship, which was detailed in a recent article by BU Today
included a $6,000 stipend and ran for six weeks concurrently with the first summer term
Proposals from applicants covered a wide range of topics
including improving class videos to fine-tuning collaborations among students
In addition to weekly group conversations over lunch and dinner at Silber Way
the fellows also had weekly one-on-one meetings with Center for Teaching and Learning Director Matthew Trevett-Smith
focusing on data-based resources specific to their projects
Trevett-Smith will check back in with the fellows to assist with self-assessment
You can read the entire BU Today story on the fellowships, entitled “Center for Teaching and Learning Expands Efforts,” here
Schilde’s research interests involve European and transatlantic security, the political economy of defense and security markets and industries, EU lobbies and interest groups, and the role of private nonstate actors in national and international security. Learn more about her here.
A new research paper published by Prof. Kaija E. Schilde of the Boston University Frederick S
Pardee School of Global Studies asks an obvious but interesting question: Who are the Europeans
The paper, published in the Journal of Common Market Studies (2014
looks at European identity outside of European integration and comes up with some novel and interesting results and sheds new light on the meaning of contemporary European identity
The abstract of the paper – titled ‘Who are the Europeans? European Identity Outside of European Integration’ – explains the argument:
What do we know about the relationship between Europe
While national identity is a multifaceted phenomenon
European identity has been linked to the growth of the European Union
This article attempts to analyze some of the attributes of individuals with European identity in central and eastern Europe prior to EU accession by applying existing hypotheses on correlates of European identity
The phenomenon of identification with Europe prior to EU accession provides a window into understanding the identity mechanisms that inform the concept of European identity
The first Eurobarometer surveys measuring European identification in central and eastern accession states reported a puzzling finding: that more people
identified with Europe than in existing EU states
An analysis of the Eurobarometer results provides counter-intuitive comparisons and contrasts between eastern and western Europe and uncovers potential mechanisms illustrating the content of contemporary European identity
The research concludes by answering its novel question
thus: “European identity might be neither an explicit attachment to the EU nor an implicit process of learning and socialization because of EU opportunities: it might be a raw cultural category of reference available to the entire public
Tagged: 2014
We are thrilled to announce that Elizabeth Amrien has been honored with the 2023 Inaugural Impact Award at Pardee
Elizabeth has served as the Assistant Director of the Center for the Study of Europe at Boston University since October 2011 and as the Assistant Director of the Center for Latin American Studies at Boston University since July 2015
making her an invaluable member of the Pardee community
Her remarkable commitment shines through as she consistently steps up when needed
showcasing immense generosity along the way
Elizabeth’s profound expertise and deep knowledge of the community have positioned her as a beacon of support for many
One nominator aptly described her as someone who effortlessly dispels fears through her engagement in tasks
Elizabeth has orchestrated the execution of hundreds of events
leaving an indelible mark on thousands of attendees
Her most recent triumph includes the successful organization of the ‘Conversations on Israel-Palestine’ series
a testament to her exceptional organizational skills and ability to make events happen even on tight timelines
it is gratifying to know I have been able to impact the school in a positive way
I have been extremely fortunate in my career at Boston University to have worked directly for not one
warm and generous women: Irena Grudzinka Gross
it is because they empowered me to succeed
If I have been able to give back to the School
it is out of this bounty of female mentors.”
Join us in acknowledging Elizabeth Amrien for her outstanding contributions and impact at Pardee
and unwavering commitment have truly set her apart
making her a well-deserved recipient of the 2023 Inaugural Impact Award
Elizabeth Amrien has been working in the international studies arena at Boston University since May 2002
and directing interdisciplinary projects of global scope and relevance
She connects people and groups doing similar work
plans and executes public and scholarly events
as the Assistant Director of the Center for the Study of Europe and the Assistant Director of the Center for Latin American Studies at Boston University
her responsibilities include event planning and program management
including an active visiting researcher program
Elizabeth holds a BA in religious studies from Fordham University (1991)
an MDiv (magna cum laude) from Yale Divinity School (1995)
She is an active member of Boston’s Church of the Advent
The Project on the Political Economy of Security, a working group at the Frederick S. Pardee School of Global Studies at Boston University
hosted their first presentation as part of the Boston Area Political Economy of Security Working Group at the Watson Institute at Brown University on February 26
the Stephen and Barbara Friedman Professor of International Political Economy in the Department of Government at Cornell
kicked off the series with his talk titled “Political Economy and International Security: The State of the Art.”
Assistant Professor of International Relations and co-director of the Project on the Political Economy of Security at the Pardee School
said the discussion set the tone for the rest of the series in laying out how economics impact security outcomes
“Jonathan Kirshner’s talk was a broad
agenda-setting discussion of some of the key ways in which economics impacts security outcomes
from the security implications of changes in oil markets to the domestic and international security implications of political movements arising in response to global secular declines in growth,” Schilde said
Schilde said she hopes the series of discussions will serve as a collaboration of economics and security experts
“We are delighted to collaborate with leading scholars working at the intersection of economics and security from across the Boston-area and beyond,” Schilde said
we plan to convene practitioners and scholars at the Pardee School to bridge academic disciplines and policy-academic divides.”
The events of 9/11 not only reshaped the global response to terrorism
but raised new and troubling questions about security
It reshaped immigration policies in the United States and led to a surge in discrimination
Pardee School professors echoed the troubling ripples that the terrorist attacks sent through American society and the world at large
Excerpts from their full responses are below
Adil Najam
Professor of International Relations and Earth & Environment
“September 11 triggered a “War on Terror” that continues even as new generations of terror organizations proclaiming to speak for “real” Islam sprout with new names and across the globe
A generation of terrorists was hunted down; many were killed
The United States has been able to deter any other attacks of similar scope on the “homeland” (a word that derived new meaning from 9/11)
But across the Middle East and parts of Asia and Africa
and conflict fanned by 9/11 and its aftermath persist.”
Associate Professor of International Relations
“I’ll mention one thing: the defense budget
The US wars in reaction to 9/11 created the contemporary American warfare state
1990s budget cuts (nearly 50 percent) partially dismantled the Cold War military
increases in military spending outpaced increases in civilian spending on education
The estimated costs of the Iraq and Afghanistan wars are $8 trillion and 900,000 lives
not including the ongoing regional political instability and the human security tolls of refugee displacement.”
“Risk analysts tell us that when a threat is emotionally charged and evokes disproportionate dread
decision makers are at risk of action bias
which involves rapidly choosing remedies without considering countervailing risks or long-term consequences
like taking ibuprofen for a headache without anticipating the risk of stomach pain…In retrospect
this is precisely the trap that policymakers fell into
Their shock and fear led them to attempt the impossible
hoping against hope that liberal institutions and protections for minorities would follow
Jack Weinstein
Professor of the Practice of International Security
The challenges facing this nation are radically different from the sole focus we had in 2001—defeating Islamic terrorists who viciously attacked our nation
as the Taliban are once again ruling the country and America’s leadership in the world is being questioned
Two decades ago we were truly “The UNITED States of America.” Under the death and destruction of 9/11
we saw Americans united in purpose and neighbors supporting each other as though they were family
that world of unity and singular focus no longer exists
Today’s international security environment is complicated
Russia and China are focused on changing the world order that was established after World War II
Professor of the Practice of International Relations
“Beginning with 9/11
the CIA became more than ever a covert action agency
Enthusiastic support for covert action replaced ambivalence
because there was almost universal support from three presidents and the Congress
Covert action by the CIA became a US government third option between doing nothing against terrorist operatives or sending tens of thousands of American military to fight in the Middle East or Central Asia
covert action by the CIA will remain and likely will grow to remain the tool of the US government to counter terrorist activities in that region.”
The full responses can be read in BU Today‘s article online
The Frederick S. Pardee School of Global Studies at Boston University is proud to welcome a new working group, “The Political Economy of Security.”
the working group hosted two events at the Pardee School this week
The first was a gala reception attended by members of the faculty and university community
“I am delighted by the interest across the BU campus and Boston for our new initiative. Questions about how economics impacts security and how security impacts economics are some of the most interesting issues we confront in the study and practice of global affairs,” said Assistant Professor Kaija Schilde, one of the leaders of the working group
“The fact that so many students came to see Professor Erickson’s talk during the busiest week of the year demonstrates how much interest there is in these topics.”
Additionally, the working group hosted a lecture by Boston College professor Jennifer Erickson entitled “The Politics of Arms Export Controls.”
Erickson is the author of “Dangerous Trade: Arms Exports, Human Rights and International Reputation,” published by Columbia University Press
She spoke of the conflicting mandates of nations which participate in arms export treaties
but who often have pressing foreign policy goals that lead to the continuation of dealing arms
“The lowest-performing human rights nations are still getting weapons,” said Erickson in the event
which was attended by a full complement of students
the only thing that can impact the flow of arms exports is a large political scandal
Earlier this semester, the working group celebrated its launch in a gala reception at the 2015 ISA Conference in New Orleans. The Political Economy of Security Working Group is led by Schilde and Rosella Cappella Zielinski of the Department of Political Science
.st1{fill-rule:evenodd;clip-rule:evenodd;fill:#2a2a2a}
By Stefani Reynolds | Contributing photographer
the village of Sharon Springs can be found on the northwest section of the town of Sharon
Named in part for the important springs in the area
Sharon Springs made its way onto the National Register of Historic Places as a historic spa village
The mineral springs in town were used as a form of medical treatment
would travel to Sharon Springs in the summer for the spas
many large hotels were built in the village
Sunnycrest Orchards has been family owned and operated since 1975
and then by their children Tim Schilde and Laurie Schmitt
and Sunnycrest now has an active farm market
greenhouses and a country gift shop on the property
Sunnycrest Orchards began making Sharon Springs Farm Girl Vinegars
The all-natural apple cider vinegar is made right on the farm
With the apple juice squeezed right in the cider mill
it is then placed in a bulk tank to age for up to two years before it reaches the shelves of the Sunnycrest Farm Store
run by Donna and Dale's brother Peter Latella
The Chow Wagon is now open April through October (weather permitting)
Latella has become "almost famous" for his chili
the 50-foot tall teepee gained its third family of owners in 2000
The Teepee has something fun for visitors and locals alike
The Tepee is sure to have plenty of amazing finds
Soak in the beautiful views between the town of Sharon Springs and the notorious Tepee in Cherry Valley
An American Emporium plays host to five incredibly unique vendors
Visitors can find a little bit of everything within these walls
photographs and a number of ceramic pieces by various artists in their gallery space
The American Hotel was built by Nicholas LaRue in 1842
after standing empty for more than 30 years
was purchased by current owners Doug Plummer and Garth Roberts
it underwent five years of extensive renovation and reopened in May of 2001
it also hosts a number of events throughout the year
Empie and Smith building was completed in 1910 and operated as a department store until the 1950s
art gallery and mail order company before becoming the antique store that it is today
the Roseboro will see a lot of changes in future while holding on to it's traditional exterior
renovations will include a library on the second floor
a restored ballroom for larger events such as weddings and receptions
and a garden surrounding the fountain on the grounds
the Roseboro got into the holiday spirit with a beautifully decorated front porch
the Roseboro was actually three separate hotels: the Howland House
the Rosenberg Hotel and the Rosenberg House
connections were added to create the 45,000-square-foot Renaissance Revival structure that exists today
Major repairs began after the Roseboro was purchased in 1996 and continue today under new ownership
Turn Around Spa and Lodge is just one of the many wonderful places to stay in Sharon Springs
with plenty of beautiful spaces and interesting stories
everything has a story inside of Turn Around Spa and Lodge
a wonderful stop on the edge of Sharon Springs
demonstrates how to use his homemade invention while having "a conversation with himself" in front of his home in Sharon Springs
After purchasing the Imperial Baths bathhouse in 2004
a South Korean-based company is now working to renovate the space into a Korean-style spa
Follow a self-guided walking tour to learn a little bit about the town of Sharon Springs and some its key landmarks
Sharon Springs' one-room schoolhouse still stands on the edge of town
Open mid-April through the middle of October
Kelly and Bruce Button opened the New York House six years ago
Each of their eight guest rooms and suites comes with a private bath equipped with spa quality products and a bath towel warmer
and the front porch is a relaxing space to enjoy some peace and quiet
A frequent host to weddings and receptions
its picturesque surroundings on the edge of town make it a perfect spot to hold events
A weekend getaway from their New York City apartment turned into a successful business for Brent Ridge and Josh Kilmer-Purcell
The two purchased the historic Beekman 1802 Farm in 2007
After coming across hard times in the 2008 recession
they had to choose to stay on the farm and make it profitable or keep their apartment in the city
After choosing to stay on the historic Beekman Farm
Brent Ridge and Josh Kilmer-Purcell opened Beekman 1802 Mercantile in the heart of town
A 12-room eclectic gift shop in the heart of Sharon Springs
has everything from toys to candles to beautiful home decor
Read messages from the many visitors of Cobbler and Co.
scrawled on the walls throughout the store
See more community photo essays
Our photographers are visiting small communities to take in the sheer beauty of life in Upstate New York
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Volume 11 - 2023 | https://doi.org/10.3389/fbioe.2023.1254136
filamentous microorganisms are known for their broad product spectrum and complex cellular morphology
Product formation and cellular morphology are often closely linked
requiring a well-defined level of mechanical stress to achieve high product concentrations
Macroparticles were added to shake flask cultures of the filamentous actinomycete Lentzea aerocolonigenes to find these optimal cultivation conditions
there is currently no model concept for the dependence of the strength and frequency of the bead-induced stress on the process parameters
shake flask simulations were performed for combinations of bead size
Contact analysis showed that the highest shear stresses were caused by bead-bottom contacts
a newly generated characteristic parameter
which relates the bead wall shear and normal stresses to the total shear area
Comparison of the SAR with previous cultivation results revealed an optimum pattern for product concentration and mean product-to-biomass related yield coefficient
this model is a suitable tool for future optimization
comparison and scaling up of shear-sensitive microorganism cultivation
the simulation results were validated using high-speed recordings of the bead motion on the bottom of the shake flask
which produces the antibiotics undecylprodigiocin and actinorhodin
Varying parameters such as reactor geometry and size
size) affect the magnitude and frequency of the bead-induced shear stress
it is challenging to compare the observed effects of beads without any characteristic quantity like the EDCF for STBs
there is no deep systematic understanding of the dependencies of stress magnitude and frequency on these parameters in this application area
CFD-DEM simulations were performed in order to determine the dependence of bead-induced mechanical stress for previously experimentally investigated parameter combinations
The numerically results were then combined with cultivation data of filamentous L
aerocolonigenes to gain general insights into the relationship between the production of the antibiotic rebeccamycin and mechanical stress
the movement of the beads at the bottom of the ShF was recorded using a high-speed camera
The bead velocities were determined from the high-speed camera images using particle tracking velocimetry (PTV) and compared with the simulations
The performed multiphase simulations of a 250 mL baffled ShF filled with glass or ceramic beads (Sigmund Lindner GmbH, Warmensteinach, Germany) and 50 mL cultivation medium are based on the CFD-DEM simulation setup established by Schrader et al. (2019)
changes and enhancements in the setup or post-processing are provided in the following sections
For more information on the models and equations used
the reader is referred to the previous work
The coefficients of friction for particle-particle and particle-wall contacts were assumed to be identical because the wall and beads are made of glass
Ceramic and glass contacts were also assumed to have the same friction coefficient as ceramic-ceramic contacts
In addition to the fluid properties for the cultivation medium
Overview about all parameter combinations used in the simulations
The stress energy (SE) according to the analytical model for stirred media mills (Kwade, 2003) is defined as
were read out at 0.01 s intervals for a period of five shaker rotations and saved in a list
This list was then used to calculate a cumulative distribution of bead velocity based on the evaluated DEM data for five shaker rotations
The mean volumetric power consumption Pv in the cultivation medium, which also depends on the shaking frequency, was calculated from the turbulent energy dissipation rate ϵ and the medium density ρm according to the following equation (Li et al., 2013):
Data were analyzed every 0.01 s to calculate the time averaged power consumption for the last five shaker rotations
Particle tracking velocimetry (PTV) was applied for the validation of the three-phase simulations of the ShF. In contrast to particle imaging velocimetry (PIV), a Lagrangian frame of reference is used to determine the velocity of a bead from its displacement during the elapsed time between two recorded images (Dracos, 1996)
an experimental setup and subsequent image processing were established in this work in order to determine bead velocities
To track the complex motion of the liquid and the beads from below the ShF, an experimental setup was constructed (Supplementary Figure S1)
An aluminum plate with four vertical threaded rods was screwed onto the base plate of the orbital shaker
already filled with 50 mL of water and beads
was clamped between two transparent polymer plates at a height of about 40 cm
To increase the stability of the experimental setup
two 3D-printed brackets and guy ropes (for 160 min−1 only) were installed
Switzerland) mounted vertically below the center of the ShF recorded images (896 × 920 pixels) at a frame rate of 200 s−1
Optimal illumination of the ShF was crucial to minimize disturbing image artifacts caused by light refraction and reflection on the water surface
a square 30 cm LED panel was placed statically above the orbital shaker
a circular LED strip was installed at the level of the bottom of the ShF
and 1.932 mm) and ceramic (0.918 mm) beads (Sigmund Lindner GmbH
Germany) were used in the experiments at shaking frequencies of 100
the minimum bead size was limited to approximately 1 mm
as smaller beads could not be reliably detected in the image analysis
The transparent glass beads were difficult to identify in the images during pre-processing
a mixture of 26% black coated marker beads and 74% transparent beads of the same size was chosen
it was not possible to use beads of a different color
so the amount of beads was reduced from 40 mL L−1 (glass) to 2.63 mL L−1 to avoid overlapping beads in the images
The number of images used to calculate the velocity distribution was the equivalent number of images taken during five rotations of the shaker
it represents the velocity spectrum within the time period under consideration
the Gaussian mask option was selected for particle detection and the cross-correlation method for particle tracking
PTVlab provides an interpolated velocity field whose expansion is determined by the spatial distribution of the beads
bead velocities that do not exist were assumed in zones without beads
the PTVlab source code was extended to output the discrete velocity distribution without spatial interpolation
The total SE represents the sum of the SEs for six different contact types, that rely on impact, shear, rolling, and torsion. Figure 1A shows the sum distribution of the total SE as well as the fractions of each contact type
(A) Cumulative distribution of total stress energy (SE) for 0.969 mm glass beads at 120 min−1 with 40 mL L−1 and fractions of six contact types; (B) Cumulative distribution of total and translational shear SE (bead-bead and bead-wall contacts)
the boundaries of the CFD and DEM simulation domains are closer together in the new mesh
resulting in a more accurate calculation of the coupling forces near the wall is achieved
the new lubrication force model includes additional calculations of tangential forces
which in together influence particle motion
suggested that pellet compression may alter the internal pellet structure due to plastic deformation or cell adhesion effects
Another potential mechanism could be an increase in mass transport due to the squeezing of culture medium out of the pellet
Shaking frequency is the driving force for the beads movement. The bead-wall shear velocity for all bead diameters increases steadily with increasing shaking frequency (Figure 2)
It is noticeable that the shear velocity initially increases gradually more strongly up to a shaking frequency of 140 min−1 and then the slope decreases
larger beads reach a higher velocities than smaller ones
this is not true for the two largest bead diameters
the shear velocities were slightly below the values for a bead size of 1.513 mm
Dependency of the bead-wall shear velocity from the shaking frequency for different glass bead diameters with a constant bead concentration (40 mL L−1)
the centrifugal effect gradually decreases because most of the beads are centrifuged to the outer zone of the ShF
it follows that the bead velocity increases linearly with the shaking frequency
friction forces) increase with increasing diameter
additional forces dampen the increase in shear velocity with the bead diameter
(A) Correlation of bead-wall shear velocity with the bead size at a constant volume concentration (40 mL L−1
529–24,257 beads) for different shaking frequencies
a constant bead number of 4,200 was used; (B) Spatially averaged bead velocity (vb) in x- and y-direction from DEM simulations
if the spatially averaged bead velocity is constant
the rotational velocity of the beads must be increasing
The rotational acceleration of a sphere is inversely proportional to its rotational inertia and rolling friction
according to the equation of rotational motion
Due to the proportionality of the rotational inertia to the mass and size of a bead
larger beads change their rotational speed more slowly than smaller or lighter beads because of the applied moments
tangential forces on a bead cause moments that accelerate or decelerate the rotation depending on the direction of the tangential force
The tangential forces depend on the normal bead forces and the coefficient of friction between the beads
beads in layers hamper each other’s rotation
the intensity of translational shear is determined by the rolling behavior of a bead
The complex interplay of influencing factors illustrates that a direct prediction of shear stress by beads is extremely complex or even impossible without simulations
When comparing the absolute velocities (Figure 3B)
it is noticeable that the bead velocities are higher than the shear velocities
it should be noted that rolling of the beads may be hindered by the biomass in the cultivation
so that in reality deviating shear velocities can occur
Influence of the glass or ceramic bead volume concentration on the bead-wall shear velocity at varying bead diameter and constant shaking frequency of 120 min−1
In addition to shaking frequency and bead size, the bead volume concentration was varied at a constant shaking frequency of 120 min−1 (Figure 4)
For a constant glass bead size of 0.969 mm
the bead-wall shear velocity first increases slightly from 0.12 to almost 0.13 m s−1 and then decreases with increasing bead volume concentration
an increase in the number of ceramic beads led to a significantly higher increase in shear velocity
at a bead volume concentration of around 40 mL L−1
approximately 43% higher shear velocities were achieved between the beads and the wall of the ShF
the velocity of the ceramic beads decreased only slightly with increasing concentration
The simulations illustrate (Supplementary Figures S4, S5 and Supplementary Videos S4, S5) that ceramic and glass beads formed layers of beads with increasing bead concentration
the glass beads spread over a larger area of the ShF bottom than the ceramic beads
The higher velocities and greater proportion of bead layers for the ceramic beads can be explained by their 52% higher density
which results in increased centrifugal forces
the coefficients of friction and rolling friction for ceramics are lower than for glass beads
which in turn can lead to a variation in the rolling and shearing velocity proportions
The influence of the shaking frequency decreases for larger beads in combination with a lower number of beads
(A) Bead-wall stress frequency (SF) for different numbers of glass beads and shaking frequencies; (B) Correlation of the bead-wall SF with shaking frequency for different glass bead diameters
All simulations were done at a constant bead volume concentration
In the previous simulations (Figure 5), both the number of beads and the diameter of the beads were varied simultaneously. Instead, in Figure 6
either the number of beads or the size of the beads was varied at a constant shaking frequency
The product of the number of beads Nb and the bead cross-projection area Ab is the total bead projection area and was considered as a measure of space required by a given number of beads
Dependency of the bead-wall stress frequency (SF) on the total projected bead area (which corresponds to the bead volume concentration) for 0.918 mm ceramic beads and glass beads of different diameters at a constant shaking frequency of 120 min-1
This is consistent with the observation that SF increases more rapidly with ceramic beads
the optimum in cultivation occurs at a slightly lower SF
From a biochemical engineering point of view, the mean volumetric power consumption (PV) plays an important role in cultivations, as it correlates in some way with mixing time, oxygen transfer and hydrodynamic stress. For a holistic evaluation of cultivation conditions from Schrinner et al. (2021), PV was determined from the turbulent energy dissipation rate (Eq. 3) for an extended shaking frequency up to 200 min-1
PV increases sharply from about 75 W m−3 at 100 min−1 to about 900 W m−3 at 200 min−1
PV decreases by 12%–16% with increasing bead diameter
Larger beads are expected to reduce the motion of the fluid so that less energy is dissipated by turbulence
Simulations without beads resulted in power inputs in a similar range to those with beads
the addition of beads appears to have little effect on the turbulent energy dissipation in the fluid
only the energy dissipation in the fluid was considered here
so the energy dissipation due to particle-particle and particle-wall interactions is missing
FIGURE 7. (A) Influence of shaking frequency on mean volumetric power consumption for different bead diameters (constant bead volume concentration of 40 mL L-1); (B) Comparison with experimental data from Peter et al. (2006b)
the dependence on the shaking frequency of 3.4 is close to the value of this study
Apart from the slightly larger flask volume (300 vs
250 mL) and the sligthly smaller liquid volume (48 vs
the main reason for the absolute higher PV is most likely the depth of the baffles (14 vs approx
7 mm) and the number of baffles (3 vs
the energy dissipation rate from the turbulence model was used to calculate PV in this study
Due to the limitations of the minimum CFD cell size in unresolved CFD-DEM simulations
additional deviations may occur because the cell sizes may not be small enough to correctly describe the turbulence
Next to the almost transparent glass beads are the black marker glass beads used to obtain the bead velocities using PTV
At the lowest shaking frequency of 100 min−1
the beads are distributed over a large area of the ShF bottom
but centrifugal forces pushed the beads further out as the speed increased
At a shaking frequency of 160 min−1
the beads were in a tightly packed bed in the curved part of the ShF bottom
This results in greater interaction between the baffles and the beads
the formation of multiple layers of beads made it difficult to detect of individual marker beads
Light reflections from the surface created dark artifacts that made image analysis even more complex
By using multiple light sources and a cardboard cylinder with aluminum foil surrounding the ShF
the light artifacts were reduced to a minimum
bead volume concentration of 40 mL L-1) experimentally recorded at the bottom of the ShF at different shaker speeds
The black points are marker beads used in the PTV analysis; CFD-DEM simulations of the multiphase flow inside the ShF (B): bottom view
The bottom and side views of the simulations show the glass beads and the fluid in the interface
the beads in the simulation are pushed further towards the outer diameter of the ShF as the shaking frequency increases
This significantly increases the velocity of both the beads and the liquid (note that the colors change with shaking frequency)
the side view shows that the liquid is increasingly forced against the side walls
While at 100 min−1 there is almost exclusively a monolayer of beads on the bottom
layers of beads are formed as already seen in the experiments
some beads are deflected at the baffles and moved upwards so that the beads are mixed more intensively
the simulations show a good qualitative agreement with the experiments
the beads are more densely packed in the experiments than in the simulations
the CFD-DEM simulations are able to describe the motion behavior of the beads in the ShF with sufficient accuracy
In addition the qualitative comparison in section 3.5.1, the velocities determined by PTV are compared with the results of simulations. Therefore, Figures 9A–C shows the cumulative bead velocities determined experimentally and numerically for three bead diameters and shaking frequencies. In general, analogous to the discussion in section 3.2.2
the bead velocity is higher than the shear velocity
This is because the overall bead velocity includes the translational rolling velocity in addition to the translational shear velocity
the experimental distributions for different bead diameters are similar
indicating that bead size has little influence on bead velocity
the distributions differ depending on bead size
the maximum velocities achieved are almost identical
A higher bead mass with larger bead diameters results in stronger centrifugal forces
so that more beads are transported to the edge of the ShF
which means that the number of beads decreases with bead diameter to the power of three as the bead size increases
the area required per bead increases as the projection area increases with bead diameter to the power of two
the required area of all beads is the product of the number of beads and the projection area
the area requirement increases inversely with decreasing bead diameter for a constant total bead mass concentration
results in more beads moving at lower velocity in the central region of the ShF for smaller bead sizes
and finally in a broader velocity distribution
which partially reduces the effect discussed before
(A-C) Glass and (D) ceramic bead velocity distributions obtained from simulations and validation experiments for different shaking frequencies and bead diameters
so this could be another reason for the observed differences
white ceramic beads were also investigated
The experimental and simulated mean and maximum velocities are close
the experimental distribution shows slightly lower velocities in the lower velocity range
it is shown that the presented experimental method is suitable to determine the velocities of the beads in the ShF
the comparison between experiment and simulation shows a high degree of agreement
the chosen simulation approach is a suitable tool for the analysis and prediction of the stresses caused by the beads
It is expected that the general motion behavior of the beads is not significantly affected by collisions with pellets due to the higher inertia of the beads
biomass entrapment between the beads may alter (rolling) friction
The size of the bio-agglomerates changes during the cultivation time, so only the shear velocity is considered for Ss. For an agglomerate size of 400 μm, the maximum shear rate ranges from 100 to 1,000 s−1 depending on the shaking frequency. Thus, the shear rate is in the range of the average shear stress that occurs in the STB (Campesi et al., 2009)
even significantly higher shear rates can occur
the normal stresses acting during shear also contribute to the damage of filamentous structures
Higher normal stresses are expected to compress the structures more
allowing shear forces to be more easily transmitted
the gravitational force of a bead Fg is used as a measure of the normal stresses
In the EDCF, the stirrer swept volume serves as a measure of the size of the zone of sufficiently high stress. However, when beads are used, the number of beads Nc in contact with the bottom (Eq. 10) correlates with the total shear stress area As
The number of bead-wall contacts present in the shake flask at any given time was not directly available from the simulation data
so the SF for bead-wall contacts was assumed to be proportional to Nc
It was also assumed that the projection area of a bead Ab is proportional to the active shear area As per bead
Macroparticles could therefore potentially enhance the release of lysis substances due to mechanical forces and thereby increasing antibiotic formation
further research is needed to explain more precisely the relationship between bead addition and increased product formation
In previous studies (Walisko et al., 2017; Schrader et al., 2019; Schrinner et al., 2021)
cultivations of the filamentous actinomycete L
aerocolonigenes were performed in ShFs with different process parameters
number and density of the beads were varied to investigate the influence on product formation
The addition of beads was found to have a decisive influence on the concentration of the antibiotic product rebeccamycin
The objective in this section was to correlate the rebeccamycin concentration and the average yield coefficient of different 10-day L
aerocolonigenes cultivations with previously presented simulation results to better understand the influence of bead stress
Transferring the simulation and modeling approach presented in this work to microtiter plates with beads may allow for a better understanding and modeling of bead-induced stress in the future
FIGURE 10. Dependency of (A) the rebeccamycin concentration and (B) the averaged yield coefficient [cultivation data from Schrader et al. (2019) and Schrinner et al. (2021)] on the SAR parameter derived from simulation data
only glass beads of different sizes and bead concentrations were used
an optimum curve was found for the product concentration as a function of the newly defined model parameter
Only two data points for the ceramic ball series (light green) do not fall within the optimum curve
These points correspond to the two highest ceramic bead concentrations (19.7 and 26.3 mL L−1)
It is also noticeable that the product concentrations are shifted on the y-axis with increasing shaking frequencies
This indicates that other effects related to shaking frequency may be affecting product formation
It is therefore necessary to vary the stresses over a wide range in order to find the optimum cultivation conditions
the SAR can be used to compare different cultivation conditions
Careful pre-selection of cultivation parameters can avoid combinations with similar SARs
thus reducing the number of cultivations required to screen for the influence of mechanical stress
Filamentous bacteria and fungi are particularly relevant for biotechnological production processes due to their broad product spectrum
In order to achieve high product formation
an optimal cellular morphology must be set during cultivation
depending on the strain and the product formation kinetics
the cellular morphology can range from dispersed mycelium to clumps to compact pellet structures
it is crucial to determine the optimal cultivation conditions as early as possible in the development of a biotechnological process
ShFs are widely used for cultivation due to their ability to parallelize
The turbulent stresses in ShFs are significantly lower than in STBs
so several studies have added macroparticles to the medium to increase the stress
resulting in either a positive or negative effect on the cultivation process
While the EDFC concept for describing mechanical stresses exists for the STB scale
a model approach for the use of macroparticles in ShFs is lacking
an existing setup for CFD-DEM simulations of a ShF was used in this study
The analysis of the bead contact types showed that the translational shear between the beads and the bottom of the ShF is the largest
bead density and shaking frequency were systematically varied to investigate the dependence of bead-wall shear velocity and bead-wall SF on these parameters
Increasing the volume concentration of the beads resulted in an increase in the maximum shear velocity between the wall and the beads up to a certain filling level
the shear velocity stagnated or decreased as the bottom of the ShF became highly covered by the beads
A higher number of beads resulted in the formation of bead layers due to the limited space at the bottom of the flask
creating new shear zones between the layers
Increasing the shaking frequency increased the shear at the bottom and promoted the formation of bead layers at the edge of the flask
The bead size affected the shear velocity differently depending on the shaking frequency
the SF between the beads and the shaking flask bottom depended on the shaking frequency
In order to compare the bead induced stresses with the results of filamentous and shear sensitive Lentzea aerocolonigens cultivations
a new characteristic parameter was defined
takes into account the ratio of bead-wall shear and normal stresses to the total shear area
Comparison of the SAR with cultivation results showed an optimum pattern for both product concentration and mean product-to-biomass related yield coefficient
the model is able to compare different macroparticle-enhanced cultivation conditions
the beads on the bottom of the ShF were recorded using a high-speed camera
The images were used to determine the velocities of the beads using particle tracking velocimetry
The comparison with the simulations showed a high agreement between simulation and experiment
the chosen simulation approach is a powerful method for quantifying bead-induced stresses in ShFs
the applicability of the model to other shear sensitive (filamentous) strains should be verified
more investigations at high shaking frequencies are necessary to explain the strongly increased product concentrations
this study will help to more systematically find the optimal cultivation conditions for shear sensitive microorganisms at the ShF scale
For a successful model-based scale-up to a STB
further research is needed to establish a relationship between the bead and fluid induced stresses
the simulations provide data for a future simulation-based investigation of the consequences of mechanical shear and normal stress at the level of bio-pellet
The raw data supporting the conclusion of this article will be made available by the authors
The authors gratefully acknowledge the financial support provided by the German Research Foundation (DFG) in the priority programmes “DiSPBiotech–Dispersity
structural and phase modifications of proteins and biological agglomerates in biotechnological” processes (SPP 1934
project number 315457657) and “Opus Fluidum Futurum–Rheology of reactive
multiphase construction materials” (SPP 2005
The authors acknowledge support from the Open Access Publication Funds of Technische Universität Braunschweig
Special thanks to Henri Müller from the chair of Process Systems Engineering (Technical University of Munich) for his support in pre-processing the experimental high-speed images of the shake flask with ceramic beads
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations
Any product that may be evaluated in this article
or claim that may be made by its manufacturer
is not guaranteed or endorsed by the publisher
The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fbioe.2023.1254136/full#supplementary-material
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Keywords: macroparticle-enhanced cultivation
Krull R and Kwade A (2023) Quantification and modeling of macroparticle-induced mechanical stress for varying shake flask cultivation conditions
Received: 06 July 2023; Accepted: 08 August 2023;Published: 04 September 2023
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"Is this really necessary?" a commentator joked during coverage of the Soudal Open in Schilde
but that hardly stopped golfer Louis de Jager from nearly taking off all his clothes
doffed his shirt and unbuckled his pants to play through the 13th hole after his ball landed on the muddy shore of a pond at the DP World Tour’s Soudal Open in Schilde
De Jager’s strategy — seemingly more about saving his outfit than retaining his dignity — was not lost on the commentators
Is this really necessary?” a broadcaster asked his partner
“He obviously doesn’t want to get mud on his shirt
Related: Pro Golfers at the Phoenix Open Express Their Annoyance with Rowdy Fans: 'I'm Just Sick of It'
In footage from the tournament
de Jager then hit the ball out of the near-hazard
who then looked down quizzically at his pristine golfing glove
ended up on the fairway a good distance away
But that didn’t stop the commentators from lending their expertise
I think personally if you’re gonna go as far as that
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Related: Golfer Adam Schenk Hits Hole-in-One — Into Spectator’s Cup! ‘I Owe You a Drink’
De Jager’s shirtless exploits did little to derail his round
even though he did land in the drink on the next hole
The athlete saved par and then went on to birdie the next three
The golfer finished the round at -2 (69) — and is -6 for the tournament — which moved him into a tie for 23rd place
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The plant will be the first in Europe to use GE’s new ZeeLung MABR technology
GE’s Water & Process Technologies offers a hybrid system in which 50% of the wastewater is treated by ZeeWeed 500D MBR
and the remaining flow of 8 million litres per day is treated by a conventional activated sludge system
The Schilde plant was originally designed for the treatment of 28 000 population equivalents (both hydraulic and biologic capacity)
but the actual load has gradually increased to 35 000
biological treatment capacity was increased by extending membrane capacity of the MBR and installing post-denitrification sand filters on the effluent of the conventional activated sludge system
the plant will meet new total nitrogen removal regulations within its existing footprint
engineered systems – GE’s Water & Process Technologies
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The Belgian selection trials for the 2013 World Young Horse Championships keep rolling on at a thunderous pace
Week after week selection shows are being held and the most recent one took place in Schilde on Saturday 11 May 2013
THe 5-year old Sopresso and the 6-year old Bailamos Biolley were the winners in their age divisions
The 5-year old preliminary test was won by Leopold Engelen aboard the Dutch owned Oldenburg bred Sopresso (by Serano Gold x Depardieu x Feiner Stern)
He scored a winning 82.80 mark but had Tom Franckx on the Dutch owned KWPN mare Dolcherie (by Painted Black x Krack C) on his heels with 81.60 points
Sopresso's owned Rob van Puijenbroek finished third himself aboard Seymour
an Oldenburg gelding by San Amour x Friedensfurst
Katrien Verreet and Brigitte de Biolley's Oldenburg licensed stallion Bailamos (by Sir Donnerhall I x Florestan) won the 6-year old division with 79.60
Nick van Laer finished second and third to complete the top three
With Sir Donovan (by Sir Donnerhall I x Weltmeyer) he was second posting a score of 78.60 and with the Belgian warmblood stallion Hydane van de Kerkhoeve (by Dayano x Wendekreis x Saygon) he earned 76,800 points
Photo © Sarah Janssens
Results - 2013 Belgian WCYH Selection Trial - Schilde
Stalls for Rent at Durondeau Dressage in Peer, Belgium
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Rémi Blot
Q: This is a photo of a child's plate that is decorated with a scene from the story of "The House That Jack Built." Since it was one of my favorite nursery rhymes when I was a child
I collect child's dishes decorated with scenes of the story
Marked on the back of the plate are the words "Triple Crown China — Germany" and three crowns
Does my plate have any value other than bringing back fond memories of my childhood
A: Children's dishes decorated with nursery rhyme scenes and characters are perennial favorites with collectors
They were made in the late 1800s and early 1900s in both the United States and Europe
the decorations were transfer prints rather than hand-painted
The mark you described was used by Unger and Schilde in Roschuetz
It would probably fetch $35 to $50 in an antiques shop
Q: I have enclosed a photo of the mark seen on the back of an oval dish that I have
I picked the dish up at a rummage sale and know nothing about it
The mark is a little blurry so just to be clear
I will have to tell you what is included below the crown
It says "Patent IronstoneChina — Bow Bells — England." A multitude of blue flowers cover the white background
The measurements are approximately nine inches by six inches and it is in mint condition
A: Mason's Patent Ironstone China made your dish
"Bow Bells" is the name of the pattern and it was also produced in brown
but uses a different mark that identifies the period of manufacture
Your circa 1920 dish would probably be worth $50 to $75
Items of a general interest will be answered in this column
To find out more about Anne McCollam and read features by other Creators Syndicate writers and cartoonists
visit the Creators Syndicate website at www.creators.com
the global wealth management division of French Crédit Agricole Group
has appointed new members to its Middle East Team
Nancy Sebaali and Rolf Schilde (pictured below) will join as Middle East Team Leaders in Dubai and Geneva
Both will also be part of the Middle East Management Committee and will report to the Global Head of the Middle East region
As Team Leader for the Middle East based in Dubai
Sebaali will have a mandate to further grow our business for the GCC and Lebanon markets
Nancy was with Société Générale Group for 11 years in various senior positions
including Global Coordinator for the Middle East private banking division
in Management from the Ecole de Management de Lyon in France and a B.A
in Economics from Saint Joseph University in Lebanon
Schilde will join as Team Leader for the Arabian Gulf Team in Geneva
and will principally focus on strengthening our business across these markets
Rolf spent 31 years at UBS in various senior Middle East banking roles
including Head of Wealth Management at the DIFC
Bahrain and Lebanon’s representative offices
Rolf holds a Bachelor of Business Administration from KLZ in Zurich
«As part of its growth strategy ‹Shaping Indosuez 2020›
Indosuez is increasing its presence and activities in key
attractive markets such as the Middle East
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The Judicial Authorities in Antwerp have opened a murder investigation after the disappearance of a 23-year-old woman from Schilde (Antwerp province)
As we reported earlier Julie Van Espen went missing on Saturday evening when she was on her way to meet friends in the centre of Antwerp
On Sunday afternoon the Judicial Authorities confirmed that there are indications that the young women met a violent end
An Examining Magistrate has been appointed to take charge of a murder investigation
On Sunday morning the Van Espen family launched an appeal on Facebook to try and find Julie
She had left her home in Schilde to cycle the around 15 km to Antwerp on her dark-coloured Peugeot women’s bicycle
Police started a search for Julie Van Espen along the banks of the Albert Canal on Saturday night
On Sunday afternoon the Judicial Authorities announced that a murder investigation had been opened
"Certain things have been found along the route taken by the woman that require further investigation”
the Judicial Authorities’ Lieselotte Claessens told journalists
"I can confirm that there are indications that point towards a violent death”
Police last night arrested a 32-year-old man
who had been holding his former wife hostage for 5 hours
Special units were called in and the street was closed for a whole time
A man took his ex-wife hostage for several hours in the centre of Schilde (Antwerp Province) last night
Police and special units attended the scene
The neighbourhood was cordoned off for more than five hours,’ the Antwerp public prosecutor's office says
No one was injured and no children were present at the premises
The man that had admitted to killing a 23-year-old student in Antwerp last Saturday is to remain in custody
Julie Van Espen was on her way to meet friend when Steve Bakelmans (39) killed her
A custody hearing in Antwerp on Friday morning has decided that he should remain in custody
Early on Saturday evening 23-year-old Julie Van Espen left her home in Schilde (Antwerp province) to cycle the 15 or kilometres to Antwerp city centre where she had arranged to meet some of her friends
Julie never arrive and a search was launched to try and find her
Steve Bakelmans who was seen on CCTV close to where Julie Van Espen’s mobile phone was traced for the final time soon become a prime suspect
He was detained on Monday morning in Leuven (Flemish Brabant) later that day Julie Van Espen’s body was found in the Albert Canal in the Antwerp District of Merksem
Steve Bakelmans has since admitted to killing the 23-year-old student as he tried to sexually abuse her
As the 2024 PGA Championship comes to an end
the DP World Tour moves to Belgium for the Soudal Open
The tournament will be played at Rinkven International Golf Club in Schilde
With the Soudal Open, the European swing will begin after the Asian swing
the purse has jumped from $2 million (in 2023) to 2.5 million
The 2024 Soudal Open has been known as the Belgian Open for the most part
The tournament has been played sporadically from 1910 to 2000
It wasn't played from 2001 to 2017 and returned in 2018 as Belgian Knockout
The 2024 Soudal Open is a 72-hole format tournament with a cut after 36 holes
It will start with the first round on Thursday
and run through the weekend to conclude with the final round on Sunday
Here is the schedule for the 2024 Soudal Open:
Rinkven International Golf Club in Schilde
The tournament will be hosted for the third consecutive time at the course after a break in 2020-2021 due to Covid-19
Belgian golfer and coach Paul Rolin designed the course in the 1980s
The cut at the venue is expected to remain low after -17 and -13 in the last two winning scores
The runner-up will get $247,500 and the third position will win $141
Here's a list of prize money till the 50th position at 2024 Soudal Ope
Simon Forsström won the 2023 Soudal Open by one stroke over Jans Dantorp. He would look to register his second victory on the DP World Tour
The 156 players in the field for the 2024 Soudal Open are as follows:
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