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Book ; Online: Workload Failure Prediction for Data Centers

Li, Jie / Wang, Rui / Ali, Ghazanfar / Dang, Tommy / Sill, Alan / Chen, Yong

2023

Abstract: Failed workloads that consumed significant computational resources in time and space affect the efficiency of data centers significantly and thus limit the amount of scientific work that can be achieved. While the computational power has increased ... ...

Abstract	Failed workloads that consumed significant computational resources in time and space affect the efficiency of data centers significantly and thus limit the amount of scientific work that can be achieved. While the computational power has increased significantly over the years, detection and prediction of workload failures have lagged far behind and will become increasingly critical as the system scale and complexity further increase. In this study, we analyze workload traces collected from a production cluster and train machine learning models on a large amount of data sets to predict workload failures. Our prediction models consist of a queue-time model that estimates the probability of workload failures before execution and a runtime model that predicts failures at runtime. Evaluation results show that the queue-time model and runtime model can predict workload failures with a maximum precision score of 90.61% and 97.75%, respectively. By integrating the runtime model with the job scheduler, it helps reduce CPU time, and memory usage by up to 16.7% and 14.53%, respectively.
Keywords	Computer Science - Distributed ; Parallel ; and Cluster Computing
Subject code	006
Publishing date	2023-01-12
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Dependence of PSS Diffusion in Multilayers of Entangled PDADMA on Temperature and Salt Concentration: More than One Diffusion Constant

Sill, Annekatrin / Nestler, Peter / Thran, Peter / Helm, Christiane A.

Macromolecules. 2021 Oct. 08, v. 54, no. 20

2021

Abstract: Layer-by-layer (LbL) assembly is a widely used tool for engineering materials and coatings, but the dynamics of the constituent polymer chains remain poorly understood. Using neutron reflectivity, the vertical diffusion of polyanion poly(styrene ... ...

Abstract	Layer-by-layer (LbL) assembly is a widely used tool for engineering materials and coatings, but the dynamics of the constituent polymer chains remain poorly understood. Using neutron reflectivity, the vertical diffusion of polyanion poly(styrene sulfonate) (PSS) (Mw(PSS) = 75.6 kDa) within PSS/poly(diallyldimethylammonium) (PDADMA) (Mw(PDADMA) = 72.1 kDa) multilayers is probed, while the annealing temperature and salt concentration were varied. Only one fraction of PSS was mobile, and the other PSS molecules were assigned to a second, almost immobile fraction, with the respective diffusion constants DPSS,fₐₛₜ and DPSS,ₛₗₒw differing by about two orders of magnitude. The model with the two different mobile fractions is the simplest one that describes the time dependence of the scattering length density profiles. The relationship between the diffusion constants and the annealing temperature can be described using the Arrhenius equation. From this, the activation energies could be determined. Conditions for Fickian diffusion and for the formation of different mobile fractions are discussed.
Keywords	anions ; diffusivity ; equations ; models ; neutron diffraction ; polymers ; salt concentration ; styrene ; sulfonates ; temperature
Language	English
Dates of publication	2021-1008
Size	p. 9372-9384.
Publishing place	American Chemical Society
Document type	Article
ZDB-ID	1491942-4
ISSN	1520-5835 ; 0024-9297
ISSN (online)	1520-5835
ISSN	0024-9297
DOI	10.1021/acs.macromol.1c00639
Database	NAL-Catalogue (AGRICOLA)

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Book: Teilprojekt: Nanorobotische Charakterisierung, Handhabung und Manipulation von Fasern und Faserbindungen

Sill, Albert

Abstract: Vorhabenziel. Das Gesamtziel des international aufgestellten Projektes ist die Verbesserung des Verstaendnisses der Holzfaser- und Faserbindungsfestigkeit. Im Teilprojekt 'Nanorobotische Charakterisierung, Handhabung und Manipulation von Faserbindungen' ... ...

Institution	OFFIS e.V., Technologiecluster Automatisierte Nanohandhabung, Escherweg 2, 26121, Oldenburg, DE
Abstract	Vorhabenziel. Das Gesamtziel des international aufgestellten Projektes ist die Verbesserung des Verstaendnisses der Holzfaser- und Faserbindungsfestigkeit. Im Teilprojekt 'Nanorobotische Charakterisierung, Handhabung und Manipulation von Faserbindungen' werden zwei Fragestellungen naeher untersucht: - Methoden zur (mechanischen) Handhabung und Manipulation von unstrukturierten Proben, wie z.B. Holzfasern, im Rasterelektronenmikroskop (REM) - Besonderheiten bei der automatisierten nanorobotischen Messung von (mechanischen) Ei-genschaften der Faserbindungen, Fasern oder Faserkomponenten, Uebergreifende Teilaspekte dieser Fragestellungen sind im Besonderen die Kontaktdetektion zwischen Tool und Faser, verschiedene Bearbeitungstechniken und Automatisierungsloesungen fuer nanorobotische Systeme. Arbeitsplanung. Die Arbeiten des OFFIS TC-ANH in diesem Teilprojekt koennen in drei Bereiche eingeteilt werden: (1) Analysen an Einzelfasern, (2) Analysen an Faserbindungen, und (3) Handhabung und Manipulation von Einzelfasern und Faserbindungen. Alle Arbeiten werden im REM stattfinden und mit nanorobotischen Systemen durchgefuehrt. Ausgehend von der Kompressionsmessung ueber den Faserquerschnitt einzelner Fasern werden Handhabungstechniken und Tool-Navigationstechniken untersucht, mit denen einzelne Fasern und Faserbindungen bearbeitet und ggf. aus dem Fasernetzwerk herausgeloest werden koennen. Ein besonderes Augenmerk liegt ausserdem auf der Bearbeitung mittels Focused Ion Beam (FIB) Methoden.
Keywords	Sonde ; Faser ; Werkzeug ; Planung ; Ionen ; Papier ; Holz ; Werkstoffkunde ; Naturfaser ; Rasterelektronenmikroskopie ; Automatisierung ; Messungen ; Nanotechnik ; Fertigungstechnik
Language	German
Document type	Book
Remark	Projektbeginn: 01.02.2012 Projektende: 31.01.2015 Foerdernummer: 033L054B
Database	Environmental research database (UFORDAT) of the German Federal Environment Agency (UBA)

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Article ; Online: Current role of staple line reinforcement in 30-day outcomes of primary laparoscopic sleeve gastrectomy: an analysis of MBSAQIP data, 2015-2016 PUF.

Demeusy, Andrew / Sill, Anne / Averbach, Andrew

Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery

2018 Volume 14, Issue 10, Page(s) 1454–1461

Abstract: Background: Laparoscopic sleeve gastrectomy (LSG) has become a dominant bariatric procedure. In the past, significant leak rates prompted the search for staple line reinforcement (SLR) techniques. Previous analysis of the Metabolic and Bariatric Surgery ...

Abstract	Background: Laparoscopic sleeve gastrectomy (LSG) has become a dominant bariatric procedure. In the past, significant leak rates prompted the search for staple line reinforcement (SLR) techniques. Previous analysis of the Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) database for all LSG suggested a detrimental influence of SLR on leak rates and overall morbidity. Objective: To investigate the relationship between various SLR techniques and bougie size with 30-day outcomes. Setting: Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program-accredited bariatric surgery hospitals. Methods: Using the Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program 2015 to 2016 Participant Use File data, primary LSG cases were divided into study groups based on surgical techniques. All variables were reported in the Participant Use File except leak rate and overall morbidity, which had to be derived. Multiple bivariate analyses were used to analyze the 30-day outcomes. Results: A total of 198,339 primary LSG operations were included and grouped into No SLR (23.0%), SLR (54.2%), oversewn staple line (9.5%), and a combination of SLR + oversewn staple line (13.3%). There were no statistical differences between study groups in mortality, overall morbidity, or leak rate. Bleeding and reoperation rates were statistically higher in the No SLR group. Bougie size was not associated with change in leak rates. Conclusion: Primary LSG is a safe procedure with low morbidity and mortality rates. SLR is associated with decreased rates of bleeding and reoperations but does not affect leak rates. The selection of SLR technique should be left to the surgeon's discretion with an understanding of the associated risks, benefits, and costs.
MeSH term(s)	Adult ; Anastomotic Leak/prevention & control ; Bariatric Surgery/methods ; Bariatric Surgery/mortality ; Bariatric Surgery/statistics & numerical data ; Female ; Gastrectomy/methods ; Gastrectomy/mortality ; Gastrectomy/statistics & numerical data ; Humans ; Laparoscopy/methods ; Laparoscopy/mortality ; Laparoscopy/statistics & numerical data ; Male ; Obesity, Morbid/mortality ; Obesity, Morbid/surgery ; Postoperative Hemorrhage/etiology ; Postoperative Hemorrhage/mortality ; Reoperation/statistics & numerical data ; Retrospective Studies ; Surgical Stapling/methods ; Surgical Stapling/mortality ; Surgical Stapling/statistics & numerical data ; Treatment Outcome ; United States/epidemiology
Language	English
Publishing date	2018-07-05
Publishing country	United States
Document type	Journal Article ; Multicenter Study ; Observational Study
ZDB-ID	2274243-8
ISSN	1878-7533 ; 1550-7289
ISSN (online)	1878-7533
ISSN	1550-7289
DOI	10.1016/j.soard.2018.06.024
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Article ; Online: Do patients with higher baseline BMI have improved weight loss with Roux-en-Y gastric bypass versus sleeve gastrectomy?

Jain, Deepali / Sill, Anne / Averbach, Andrew

Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery

2018 Volume 14, Issue 9, Page(s) 1304–1309

Abstract: Background: As sleeve gastrectomy (SG) becomes the most common bariatric procedure, it remains unclear for which patients laparoscopic Roux-en-Y gastric bypass (LRYGB) may be advantageous. Some contend that patients with higher initial body mass index ( ... ...

Abstract	Background: As sleeve gastrectomy (SG) becomes the most common bariatric procedure, it remains unclear for which patients laparoscopic Roux-en-Y gastric bypass (LRYGB) may be advantageous. Some contend that patients with higher initial body mass index (BMI) achieve better weight loss with LRYGB. Objectives: This study evaluates weight loss in SG versus LRYGB patients based on preoperative BMI. Setting: Community teaching hospital, Baltimore, Maryland. Methods: A convenience cohort of 4935 individuals, undergoing bariatric surgery from 2001 to 2015, was studied to examine 5-year postsurgical trends in weight loss stratified by baseline BMI and procedure. Student t tests compared mean weight loss of baseline BMI groups (<45 versus ≥45; <50 versus ≥50; and <55 versus ≥55) and line graphs and plotted 95% confidence intervals of mean weight loss by year were examined to discern differences in percent excess weight loss (%EWL) by procedure type. Results: All patients were more likely to be female (79%) and Caucasian (62.5%). Nearly twice as many patients underwent LRYGB (N = 3236) compared with SG (N = 1699). In patients in the BMI <45, 50, and 55 kg/m Conclusion: In conclusion, patients with lower baseline BMI had improved %EWL regardless of procedure, but those patients with higher baseline BMI who underwent LRYGB did have higher %EWL than those undergoing SG at 2 years follow-up. BMI is one of many key factors when selecting a procedure for an individual patient.
MeSH term(s)	Adult ; Body Mass Index ; Female ; Gastrectomy/statistics & numerical data ; Gastric Bypass/statistics & numerical data ; Humans ; Male ; Middle Aged ; Obesity, Morbid/epidemiology ; Obesity, Morbid/surgery ; Retrospective Studies ; Weight Loss/physiology
Language	English
Publishing date	2018-05-26
Publishing country	United States
Document type	Journal Article
ZDB-ID	2274243-8
ISSN	1878-7533 ; 1550-7289
ISSN (online)	1878-7533
ISSN	1550-7289
DOI	10.1016/j.soard.2018.05.014
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Article ; Online: Establishing a telemedicine program for interventional radiology: a study of patient opinion and experience.

Alzubaidi, Sadeer J / Khurana, Aditya / Sill, Andrew / Knuttinen, J Martha-Gracia / Kriegshauser, Scott / Naidu, Sailendra / Patel, Indravadan / Oklu, Rahmi

Diagnostic and interventional radiology (Ankara, Turkey)

2022 Volume 28, Issue 6, Page(s) 603–608

Abstract: PURPOSE The COVID-19 pandemic forced healthcare officials to implement new policies, such as the use of virtual consultations over office-based medical appointments, to reduce the transmission of the virus. The purpose of this study is to quantitatively ... ...

Abstract	PURPOSE The COVID-19 pandemic forced healthcare officials to implement new policies, such as the use of virtual consultations over office-based medical appointments, to reduce the transmission of the virus. The purpose of this study is to quantitatively compare patients' experiences with virtual outpatient telemedicine encounters at a single academic institution in Interventional Radiology (IR) and in-person visits during the course of the COVID-19 pandemic. METHODS The TeleENT Satisfaction Questionnaire and the Medical Communication Competence Scale (MCCS) were used to survey patients' satisfaction with both in-person and virtual office visits. RESULTS Ninety respondents (38 in-person, 52 virtual) acknowledged numerous benefits of virtual visits versus in-person office visits including reductions in time, cost, and potential viral transmission risk during the COVID-19 pandemic. No statistically significant difference was noted, based on a Likert scale from 1 to 7, between in-person and virtual visits (all p > 0.05) for scheduling related factors. No statistically significant difference was noted in any of the MCCS subscales between the two cohorts in regards to medical information communication (all p > 0.05). A majority of patients with virtual encounters (82.7%) stated that it was easy to obtain an electronic device for use during the telemedicine visit, and 73.1% of patients felt that setting up the telemedicine encounter was easy. CONCLUSION This study demonstrates that telemedicine is an acceptable alternative to in-office appointments and could increase access to IR care outside of the traditional physician-patient interaction. With telemedicine visits, patients can communicate their concerns and obtain information from the doctor with noninferior communication compared to in-person visits.
MeSH term(s)	Humans ; COVID-19/epidemiology ; Pandemics/prevention & control ; Radiology, Interventional ; Telemedicine/methods ; Patient Satisfaction
Language	English
Publishing date	2022-12-22
Publishing country	Turkey
Document type	Journal Article
ZDB-ID	2184145-7
ISSN	1305-3612 ; 1305-3612
ISSN (online)	1305-3612
ISSN	1305-3612
DOI	10.5152/dir.2022.21837
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Pregnant sein, positiv fühlen, Herzlich willkommen

Sill, A.

HebammenInfo

2003 Volume -, Issue 1, Page(s) 21

Language	German
Document type	Article
ZDB-ID	2297880-X
Database	Current Contents Medicine

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Article ; Online: Use of CT Scans for Abdominal Pain in the ED: Factors in Choice.

Mwinyogle, Aubrey A / Bhatt, Astha / Ogbuagu, Onyebuchi U / Dhillon, Neer / Sill, Anne / Kowdley, Gopal C

The American surgeon

2020 Volume 86, Issue 4, Page(s) 324–333

Abstract: Overutilization of healthcare resources is a threat to long-term healthcare sustainability and patient outcomes. CT is a costly but efficient means of assessing abdominal pain; however, 97 per cent of ED physicians acknowledge its overutilization. This ... ...

Abstract	Overutilization of healthcare resources is a threat to long-term healthcare sustainability and patient outcomes. CT is a costly but efficient means of assessing abdominal pain; however, 97 per cent of ED physicians acknowledge its overutilization. This study sought to understand factors that influence ED providers' decision regarding CT use in the evaluation of abdominal pain. After evaluating a patient for acute abdominal pain, ED providers filled in a form in which the primary diagnosis and index of suspicion were recorded. Bivariate and multivariate analyses were used to identify predictors of outcomes. The CT scan utilization rate was 54.82 per cent. Whereas 34.11 per cent of CT scans were normal, 30 per cent yielded an acute abdominal pathology. Tenderness and rebound tenderness were positive predictors of high index of suspicion [odds ratio (OR) 2.09 and 2.54, respectively]. These variables were also predictive of obtaining a CT scan [OR 2.64 and 3.41, respectively]. Compared with whites, the index of suspicion was 26 per cent and 56 per cent less likely to be high when patients were black [OR 0.73] or Hispanic [OR 0.44] respectively. Blacks and Hispanics were less likely to have CT scans performed than whites [OR 0.58 and 0.48, respectively]. Leukocytosis significantly affected the index of suspicion for acute abdominal pathology, obtaining a CT scan and the acuity of CT scan diagnosis on multivariate analysis. Patients aged ≥60 years had 2.03 odds of acute CT finding compared with those aged <60 years. There is a need for committed efforts to optimize CT scan utilization and eliminate socioeconomic disparities in health care.
MeSH term(s)	Abdominal Pain/diagnostic imaging ; Abdominal Pain/ethnology ; Adolescent ; Adult ; Age Factors ; Aged ; Aged, 80 and over ; Body Weight ; Emergency Service, Hospital ; Female ; Healthcare Disparities ; Humans ; Male ; Medical Overuse/statistics & numerical data ; Middle Aged ; Multivariate Analysis ; Risk Factors ; Socioeconomic Factors ; Tomography, X-Ray Computed/statistics & numerical data ; Young Adult
Language	English
Publishing date	2020-05-11
Publishing country	United States
Document type	Journal Article
ZDB-ID	202465-2
ISSN	1555-9823 ; 0003-1348
ISSN (online)	1555-9823
ISSN	0003-1348
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Article ; Online: Use of Computerized Tomography in Abdominal Pain.

Bhatt, Astha / Yang, Xihua / Karnik, Nihaal / Sill, Anne / Kowdley, Gopal

The American surgeon

2018 Volume 84, Issue 6, Page(s) 1091–1096

Abstract: Annually, approximately 70 million computed tomography (CT) scans are performed in emergency department (ED) settings in the United States of America. From 1995 to 2007, there has been a 5.9-fold increase in the use of CT scans nationally. The radiation ... ...

Abstract	Annually, approximately 70 million computed tomography (CT) scans are performed in emergency department (ED) settings in the United States of America. From 1995 to 2007, there has been a 5.9-fold increase in the use of CT scans nationally. The radiation risks and high costs associated with CT scans underscore the fact that the imaging modality, although necessary, carries a myriad of long-term risks to both patients and providers. For the workup of abdominal pain, most algorithms include the use of CT scan as an early step. To understand better the use of CT scans in our ED, we performed a retrospective review of patients presenting to the ED with abdominal pain. Two main questions were addressed: 1) what were the reasons for scans and how often did the scans reveal pathology related to the presenting symptoms, 2) how often were incidental findings identified. Our results showed that among patients presenting with abdominal pain to the ED, 50 per cent of the scans were normal, about 20 per cent of the patients had findings correlating with acute abdominal pain, whereas the rest (30%) had incidental findings that may have led to further outpatient studies or long standing abdominal pain. Most patients who presented to the ED had nonspecific abdominal pain i.e. 64.4 per cent. There was a low agreement between the presenting quadrant of pain and final pathological diagnosis (9.5-33.3% concordance), with left flank pain presentation having the highest level of agreement with the final pathologic diagnosis.
MeSH term(s)	Abdominal Pain/diagnostic imaging ; Abdominal Pain/etiology ; Adult ; Emergency Service, Hospital ; Female ; Humans ; Incidental Findings ; Male ; Middle Aged ; Patient Selection ; Retrospective Studies ; Tomography, X-Ray Computed
Language	English
Publishing date	2018-06-01
Publishing country	United States
Document type	Journal Article
ZDB-ID	202465-2
ISSN	1555-9823 ; 0003-1348
ISSN (online)	1555-9823
ISSN	0003-1348
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Article: Tailorable Polyanion Diffusion Coefficient in LbL Films: The Role of Polycation Molecular Weight and Polymer Conformation

Sill, Annekatrin / Nestler, Peter / Azinfar, Amir / Helm, Christiane A

Macromolecules. 2019 Nov. 14, v. 52, no. 22

2019

Abstract: Assembly of oppositely charged macromolecules (proteins, DNA, polyelectrolytes) is often used for surface modification and functionalization. Yet, it remains a challenge to control the position and mobility of the molecules within the assembly. Using ... ...

Abstract	Assembly of oppositely charged macromolecules (proteins, DNA, polyelectrolytes) is often used for surface modification and functionalization. Yet, it remains a challenge to control the position and mobility of the molecules within the assembly. Using polyelectrolyte multilayers as model systems, we study the diffusion constant of the polyanion PSS. DPSS could be varied by 5 orders of magnitude. Two parameters were found to be important: (i) the conformation of the polyelectrolytes and (ii) the molecular weight of the polycation (Mw(PDADMA)); the latter was the dominant parameter. Independent of conformation, by increasing Mw(PDADMA), DPSS decreased by at least 3 orders of magnitude when Mw(PDADMA) increased by a factor of seven. The decrease was stronger than predicted by any scaling law; it was either exponential or abrupt after DPSS was almost constant for low Mw(PDADMA). The polymer conformation was adjusted with the salt concentration in the preparation solution. Flatter and less entangled chains led to an increase in DPSS. These findings on the time dependence of the internal structure of assemblies are discussed in the context of network theory.
Keywords	DNA ; anions ; cations ; diffusivity ; models ; molecular weight ; network theory ; polymers ; proteins ; salt concentration
Language	English
Dates of publication	2019-1114
Size	p. 9045-9052.
Publishing place	American Chemical Society
Document type	Article
ZDB-ID	1491942-4
ISSN	1520-5835 ; 0024-9297
ISSN (online)	1520-5835
ISSN	0024-9297
DOI	10.1021/acs.macromol.9b01761
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