2,282 research outputs found
Predictive flood mapping in cloud-obscured satellite imagery
No full textThesis (Master's)--University of Washington, 2020Maps of flood inundation derived from satellite imagery during and after a flood event are critical tools for disaster management. Their utility, however, is limited by optically thick cloud cover that obscures many spaceborne sensors. This study explores a data-driven method to predict flooding in cloud-obscured pixels. For an obscured image, models were trained on visible pixels using 30-meter flood conditioning features and then used to predict flooding on the cloud-covered pixels of that same image. Logistic regression, random forest, and neural networks were evaluated. To obtain prediction uncertainty estimates, a Bayesian neural network using Monte Carlo dropout was trained and compared to Logistic regression confidence intervals. Logistic regression and neural networks averaged 96% accuracy and 86% AUC, but poor recall of <35%. The Bayesian neural network provided useful measures of uncertainty that tracked well with prediction errors. Finer resolution data and more input features may improve this method
Encouraging Business Start-ups in North Carolina: An Interview with Professor Dick Levin
No full textDick Levin is the Phillip Hettleman Professor and former Associate Dean for Management Programs in the Graduate School of Business Administration, the University of North Carolina at Chapel Hill. He specializes in strategic planning, new ventures, and financial management in private companies. A small businessman himself, he has written several popular books on finance and management which serve as practical guides to new and small businesses
"The Consolidated Assistance Program, Reforming Welfare by Synchronizing Public Assistance Benefits"
No full textLevin-Waldman examines the structure of existing welfare programs and concludes that the current array of benefits could be synchronized and consolidated to create a new system that would provide economic incentives to work. He suggests combining elements of the earned income tax credit (EITC) and current welfare programs into one program, a consolidated assistance program (CAP). Levin-Waldman argues that a program composed of an assistance component (with one set of benefits for working parents and a different set for nonworking parents) and a child support component could be designed to assure minimal subsistence to those unable to work while providing incentives for those on welfare to work without, in effect, penalizing them for getting off welfare. Such a program would reform welfare more expeditiously than a plan that would simply expand the EITC or put a time limit on welfare benefits. Moreover, such a plan would not necessarily add to the national budget deficit.
Head of Schmarya Levin (1867-1935) 20th century
No full textThe sitter was a Russian-born writer and Zionist. Signed and numbered 2/25 in lower left.Mrs. Zeno Darmstadter, New York.Digital imageDr. Schmarya Levin (1867-1935) was a well-known author and Zionist leader
Oral History Interview: Henry Wortis (1371)
No full textAbstract: In his March 2005 interview with Matt Levin, Henry Wortis discusses his involvement in the Labor Youth League while an undergraduate at the University of Wisconsin-Madison. He details the group?s membership, activities, and relationship with the wider array of leftist political ideologies, emphasizing the growing division between the Old Left and youth in the LYL. This interview was originally conducted for the author?s research for Cold War University and has been submitted for inclusion into the UW-Madison Oral History Program
In Their Time: The Riddle Behind the Epistolary Friendship Between Ernest Hemingway and Ivan Kashkin
No full textDetails Hemingway’s relationship with his Russian translator, critic, epistolary friend, and later biographer Ivan Kashkin. Despite Kashkin’s merciless assessments of Hemingway’s mental health and writing, Hemingway remained loyal to his friend, honoring Kashkin by naming one of the Soviet fighters in For Whom the Bell Tolls after him. Suggesting that each author was the other’s alter ego, Levin examines Kashkin’s poetry and tragic life in the context of their shared generation
Hannah Arendt – Rahel Levin: duas biografias, sujeito e espelho
No full textEste artigo propõe uma reflexão sobre a biografia de Rahel Levin produzida por Hannah Arendt com o intuito de abordar a complexidade desse exercício que revela tanto aspectos metodológicos, quanto dimensões sócio-antropológicas e intelectuais da autora e de seu tema. A análise desse trabalho biográfico, somada a outras fontes conduziu à descoberta de aspectos dos usos adotados por Arendt para o método biográfico, questões relacionadas à identidade e ao surgimento da categoria “indivíduo” na Europa a partir do século XVIII, ao lado de aspectos sutis do pensamento da biógrafa bem como suas relações com a mulher cuja vida a fascinou.AbstractThis article proposes a reflection about Hannah Arendt’s biography on Rahel Levin aiming to approach this complexity that reveals methodological, social-anthropological and intellectual aspects of both the author and her theme. The analyses of this biographic work along with other sources has taken to the discovery of Arendt’s biographic method, of issues related to identity and the birth of the “individual” category in Europe since the 18th century, sided to subtle aspects of the writer as well as her relations with Levin’s fascinating life.Key-Words: Hanna Arendt. Rahel Levin. Biographic Method. Individual. Identity. Romanticis
Moyshe Levin (Ber Sarin) of Yung-Vilne and His Solo Publishing Venture for Children
No full textMoshe [Moyshe] Levin, talented author and artist, was better known by his pseudonym Ber Sarin, the pen name he used when he wrote short Yiddish books in rhyme for children who were just beginning to read. He wrote the lively texts, illustrated them in color and black and white, and self-published many of them in Vilnius (Vilna) Lithuania in the 1930s. The books were popular and successful with teachers and children. He was a graduate of the Vladimir Medem Teachers’ Seminary, a teacher in the TSYSHO school system, and a member of Yung-Vilne .2017 is the 75th anniversary of Levin’s murder at the hands of the Nazis. Levin left behind a wife and daughter who also perished during the Holocaust. Levin’s literary legacy, the books themselves, survived in limited numbers in only a handful of libraries; some are now available on the web. This article includes a brief biography of Moshe ]Moyshe] Levin (Ber Sarin), an overview and discussion of his work for children, information on the current whereabouts of his works, and a bibliography with brief annotations of the works the author was able to view.</jats:p
An investigation of the response of a model class IIIA Adenyly Cyclase to carbon dioxide
No full textAdenylyl cyclase catalyses the conversion of adenosine triphosphate into 3’,5'-cyclic adenosine monophosphate and pyrophosphate. Adenylyl cyclases are grouped into six distinct Classes based on amino acid sequence similarity. Mammalian adenylyl cyclases and numerous prokaryotic adenylyl cyclases are grouped into Class III. Class III is further sub-divided into four sub-Classes, IIIa, IIIb, IIIc, and IIId, based upon amino acid polymorphisms within the active site. Class IIIa adenylyl cyclases include the mammalian G- protein regulated transmembrane adenylyl cyclases and numerous prokaryotic adenylyl cyclases such as Rv1625c from Mycobacterium tuberculosis. Class IIIb adenylyl cyclases include the mammalian soluble adenylyl cyclase and numerous prokaryotic adenylyl cyclase such as CyaB1 from Anabaena PCC 7120. Class IIIb adenylyl cyclases are stimulated by inorganic carbon. New findings dispute whether the inorganic carbon stimulation of Class IIIb adenylyl cyclases is by HCO(_3) or CO(_2). Class IIIa adenylyl cyclases have previously been demonstrated to be non-responsive to HCO(_3) but have not been investigated with CO(_2) .Experiments were performed using the prokaryotic Class IIIa adenylyl cyclase Rv1625c(_204-443)- The specific activity of Rvl625c (_204-443) was obtained by measuring the conversion of [a-(32)P]ATP into [(^32)P]cAMP. Rv1625c (_204-443) was assayed for pH dependence, cation dependence, dose dependence, enzyme kinetics, and inorganic carbon-activating species in the presence or absence of inorganic carbon. The results showed that in vitro Rv1625c(_204-443) is stimulated by CO(_2) and not HCO(_3) below pH 7.5 with an apparent E.C.(_50) value of 13.2 ± 0.6 mM. Experiments were performed to investigate in vivo CO(_2) stimulation of Rv1625c(_204-443) transformed into Escherichia coli cells. The results showed that in vivo Rv1625c(_204-443) is stimulated by 10 % (v/v) CO(_2) in air. CO(_2) stimulation of Rv1625c(_204-443) was further investigated by identifying the conditions required for CO(_2) to bind to Rv1625c(_204-443). Numerous spectroscopic and biochemical techniques were used to identify conditions required for CO(_2) binding such as circular dichroism spectroscopy, Fourier transform infrared spectroscopy, HCO(_3) dependent luminescence probe spectroscopy, CO(_2) stimulation assays on Rv1625c(_204-443) mutant proteins, and CO(_2) binding assays. The results showed that metal is not required for CO(_2) binding. CO(_2) binds solely to the apoprotein. As CO(_2) does not require any cefaclors or substrate to bind to Rv1625c(_204-443), the elucidation of the CO(_2) binding site on Rv1625c(_204-443) was attempted. Numerous binding sites were investigated, such as amino acids in the active site with a primary or secondary amine side group (forming a potential carbamate with CO(_2)). Double and triple amino acid CO(_2) binding sites were also investigated by identifying the amino acids that conespond to the HCO(_3) binding site from mammalian soluble adenylyl cyclase. CO(_2) binding was also investigated by growing Rv1625c crystals, exposing the crystals to CO(_2) and X-ray diffraction studies on the crystals to obtain a diffraction data set. Unfortunately none of these techniques was able to identify the CO(_2_ binding site of Rv1625c.This surprising and novel finding that CO’_2’ binds and stimulates Rv1625c(_204-443) suggests that other Class IIIa adenylyl cyclases, including the heterotrimeric G-protein stimulated mammalian adenylyl cyclases are also stimulated by CO(_2) and further work needs to be done in this area
A Framework for Considering the Carbon and Health Co-Benefits of Afforestation and Avoided Forest Conversion
No full textThesis (Master's)--University of Washington, 2023Ecosystem services frequently overlap. Natural climate solutions (NCS) can significantly contribute to carbon dioxide equivalent (CO2e) emissions reduction goals by increasing carbon storage and preventing CO2e emissions from forests, wetlands, grasslands, and agricultural lands. Implementation of certain NCS, particularly afforestation and avoided forest conversion, can also provide co-benefits that support human health. However, co-benefit analyses of NCS pathways are rare, which can lead to an underestimation of the value of these NCS pathways and the development of land management plans that overlook opportunities to make progress across multiple objectives. Here, we begin to address this gap by developing a framework for prioritizing areas on the landscape to achieve two management objectives: (1) maintain or increase the capacity to sequester carbon, and (2) reduce adverse human health outcomes through exposure to green space. Using the Puget Sound region as a case study, we operationalize the framework and explore the benefits for human health disparities and carbon storage, explicitly considering co-benefits when developing implementation plans for NCS. Our analysis revealed that census tracts in less developed areas in the Puget Sound region are relatively high priority for maintaining existing carbon storage, and the same is true of the spatial distribution of the priority of census tracts for maintaining existing carbon storage and simultaneously supporting human health. Conversely, census tracts in and around metropolitan areas in the Puget Sound region are relatively high priority for augmenting carbon sequestration through afforestation, supporting human health, and augmenting carbon sequestration while simultaneously supporting human health. Our analyses highlight that varying the objectives of management actions can generate very different spatial patterns of places where management should be prioritized, and these divergent spatial patterns impact the ability of management actions to achieve specific outcomes
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