cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Coping with Time-Varying Demand When Setting Staffing Requirements for a Service System
Creators: name: Green, Linda V.
name: Kolesar, Peter J.
name: Whitt, Ward
Publisher: name: Columbia University
Year: 2007
Subjects: Call centers
Queuing theory
Police patrol--Mathematical models
Banks and banking
Hospitals--Emergency services
Industrial engineering
Probabilities
Operations research

description: We review queueing-theory methods for setting staffing requirements in service systems where customer demand varies in a predictable pattern over the day. Analyzing these systems is not straightforward, because standard queueing theory focuses on the long-run steady-state behavior of stationary models. We show how to adapt stationary queueing models for use in nonstationary environments so that time-dependent performance is captured and staffing requirements can be set. Relatively little modification of straightforward stationary analysis applies in systems where service times are short and the targeted quality of service is high. When service times are moderate and the targeted quality of service is still high, time-lag refinements can improve traditional stationary independent period-by-period and peak-hour approximations. Time-varying infinite-server models help develop refinements, because closed-form expressions exist for their time-dependent behavior. More difficult cases with very long service times and other complicated features, such as end-of-day effects, can often be treated by a modified-offered-load approximation, which is based on an associated infinite-server model. Numerical algorithms and deterministic fluid models are useful when the system is overloaded for an extensive period of time. Our discussion focuses on telephone call centers, but applications to police patrol, banking, and hospital emergency rooms are also mentioned.
Value-Based Routing and Preference-Based Routing in Customer Contact Centers
Creators: name: Sisselman, Michael E.
name: Whitt, Ward
Publisher: name: Columbia University
Year: 2007
Subjects: Customer services
Call centers
Labor turnover
Industrial engineering
Probabilities
Queuing theory
Operations research

description: Telephone call centers and their generalizations—customer contact centers—usually handle several types of customer service requests (calls). Since customer service representatives (agents) have different call-handling abilities and are typically cross-trained in multiple skills, contact centers exploit skill-based routing (SBR) to assign calls to appropriate agents, aiming to respond properly as well as promptly. Established agent-staffing and SBR algorithms ensure that agents have the required call-handling skills and that call routing is performed so that constraints are met for standard congestion measures, such as the percentage of calls of each type that abandon before starting service and the percentage of answered calls of each type that are delayed more than a specified number of seconds. We propose going beyond traditional congestion measures to focus on the expected value derived from having particular agents handle various calls. Expected value might represent expected revenue or the likelihood of first-call resolution. Value might also reflect agent call-handling preferences. We show how value-based routing (VBR) and preference-based routing (PBR) can be introduced in the context of an existing SBR framework, based on static-priority routing using a highly-structured priority matrix, so that constraints are still met for standard congestion measures. Since an existing SBR framework is used to implement VBR and PBR, it is not necessary to replace the automatic call distributor (ACD). We show how mathematical programming can be used, with established staffing requirements, to find a desirable priority matrix. We select the priority matrix to use during a specified time interval (e.g., 30-minute period) by maximizing the total expected value over that time interval, subject to staffing constraints.
title: The subsurface Flow and Transport Experimental Laboratory: a new Department of Energy user's facility for intermediate-scale experimentation
title: Hydrology days 2004
titleType: AlternativeTitle
title: AGU hydrology days 2004
titleType: AlternativeTitle
Creators: name: Oostrom, M.
name: Wietsma, T. W.
name: Foster, N. S.
name: Colorado State University, Publisher
Publisher: name: Mountain Scholar
Year: 2004

description: 24th annual AGU hydrology days was held at Colorado State University on March 10-12, 2004.
description: Includes bibliographical references.
description: Intermediate-scale experiments for flow and transport are important for the physical simulation of subsurface features and conditions encountered in the field at government and private sites. To offer a capability where scientists and engineers are able to conduct such experiments, a new facility has been developed in the Environmental Molecular Sciences Laboratory at the Pacific Northwest National Laboratory. The new facility, called the Subsurface Flow and Transport Experimental Laboratory (SFTEL), offers a variety of columns and flow cells, a new state-of-the-art dual-energy gamma system, a fully automated saturation-pressure apparatus, and extensive analytical equipment for sample processing. The new facility, including qualified staff, is available free of cost for scientists interested in collaboration on conducting high-quality flow and transport experiments, including contaminant remediation. Close linkages exist between the SFTEL and numerical modelers to aid in experimental design and interpretation. In this paper, the new facility is discussed and some examples of recent intermediate-scale experiments are presented.
Noncommutative fluid dynamics in the Snyder space-time
Creators: name: Abdalla, M. C. B.
name: Holender, L.
name: Santos, M. A.
name: Vancea, I. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In this paper, we construct for the first time the non-commutative fluid with the deformed Poincare invariance. To this end, the realization formalism of the noncommutative spaces is employed and the results are particularized to the Snyder space. The non-commutative fluid generalizes the fluid model in the action functional formulation to the noncommutative space. The fluid equations of motion and the conserved energy-momentum tensor are obtained.
description: 12 pages. Version published by Phys. Rev. D
Fishing, curing and smoking fish at Cueva de los Vampiros: a contextual and archeofaunal evaluation of a purported pre-Columbian fishing camp near Parita Bay (Panama, Central Pacific)
Creators: name: Carvajal Contreras, Diana Rocio
Publisher: name: University of Calgary
Year: 2010

description: Bibliography: p. 393-429
description: Most pages are in colour.
Power-law entropy-corrected HDE and NADE in Brans-Dicke cosmology
Creators: name: Sheykhi, A.
name: Karami, K.
name: Jamil, Mubasher
name: Kazemi, E.
name: Haddad, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Considering the power-law corrections to the black hole entropy, which appear in dealing with the entanglement of quantum fields inside and outside the horizon, the holographic energy density is modified accordingly. In this paper we study the power-law entropy-corrected holographic dark energy in the framework of Brans-Dicke theory. We investigate the cosmological implications of this model in detail. We also perform the study for the new agegraphic dark energy model and calculate some relevant cosmological parameters and their evolution. {As a result we find that this model can provide the present cosmic acceleration and even the equation of state parameter of this model can cross the phantom line $w_D=-1$ provided the model parameters are chosen suitably}.
description: 14 pages, 2 figure, accepted by IJTP
What you should know about queueing models to set staffing requirements in service systems
Creators: name: Whitt, Ward
Publisher: name: Columbia University
Year: 2007
Subjects: Call centers
Queuing theory
Queuing networks (Data transmission)
Industrial engineering
Probabilities
Operations research

description: One traditional application of queueing models is to help set staffing requirements in service systems, but the way to do so is not entirely straightforward, largely because demand in service systems typically varies greatly by the time of day. This article discusses ways - old and new - to cope with that time-varying demand.
Two fluid approximations for multi-server queues with abandonments
Creators: name: Whitt, Ward
Publisher: name: Columbia University
Year: 2005
Subjects: Queuing networks (Data transmission)
Queuing theory
Call centers
Industrial engineering
Probabilities
Operations research

description: Insight is provided into a previously developed M/M/s/r+M(n) approximation for the M/GI/s/r+GI queueing model by establishing fluid and diffusion limits for the approximating model. Fluid approximations for the two models are compared in the many-server efficiency-driven (overloaded) regime. The two fluid approximations do not coincide, but they are close.
title: Generating Tests that Cover Input Structure
Creators: name: Pereira Borges Jr., Nataniel
name: Havrikov, Nikolas
name: Zeller, Andreas
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2020
Subjects: subject: grammar
subject: coverage
subject: automated testing
subject: input generation
subject: knowledge-base
subject: android

description: To systematically test a program, one needs good inputs—inputs that are valid such that they are not rejected by the program, and inputs that cover as much of the input space as possible in order to reach a maximum of functionality. We present recent techniques to systematically cover input structure. Our k-path algorithm for grammar production [HZ19] systematically covers syntactic elements of the input as well as their combinations. We show how to learn such input structures from graphical user interfaces, notably their interaction language [DBZ19]. Finally, we demonstrate that knowledge bases such as DBPedia can be a reliable source of semantically coherent inputs [Wa20]. All these techniques result in a significantly higher code coverage than state of the art.
title: Under 35? Is it safe not to biopsy benign looking solid lesions?
Creators: name: Chang, Sau Lee
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Breast
subject: Breast
subject: Ultrasound
subject: Biopsy
subject: Neoplasia
subject: Tissue characterisation
subject: Retrospective
subject: Not applicable
subject: Multicentre study

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: According to current best practice, all breast lumps in women above 25 years old should be biopsied. However, only 4% breast cancer was diagnosed before 40 years old in the UK, 2018 (1). Although breast biopsy is essential in giving an accurate...
Dynamic staffing in a telephone call center aiming to immediately answer all calls
Creators: name: Whitt, Ward
Publisher: name: Columbia University
Year: 1999
Subjects: Call centers
Forecasting
Queuing networks (Data transmission)
Industrial engineering
Probabilities
Queuing theory
Operations research

description: This paper proposes practical modeling and analysis methods to facilitate dynamic staffing in a telephone call center with the objective of immediately answering all calls. Because of this goal, it is natural to use infinite-server queueing models. These models are very useful because they are so tractable. A key to the dynamic staffing is exploiting detailed knowledge of system state in order to obtain good estimates of the mean and variance of the demand in the near future. The near-term staffing needs, e.g., for the next minute or the next 20 min., can often be predicted by exploiting information about recent demand and current calls in progress, as well as historical data. The remaining holding times of calls in progress can be predicted by classifying and keeping track of call types, by measuring holding-time distributions and by taking account of the elapsed holding times of calls in progress. The number of new calls in service can be predicted by exploiting information about both historical and recent demand.
Heavy-traffic limits for many-server queues with service interruptions
Creators: name: Pang, Guodong
name: Whitt, Ward
Publisher: name: Columbia University
Year: 2009
Subjects: Queuing networks (Data transmission)
Lévy processes
Industrial engineering
Probabilities
Queuing theory
Operations research

description: We establish many-server heavy-traffic limits for G/M/n + M queueing models, allowing cus- tomer abandonment (the +M), subject to exogenous regenerative service interruptions. With unscaled service interruption times, we obtain a FWLLN for the queue-length process, where the limit is an ordinary differential equation in a two-state random environment. With asymptoti- cally negligible service interruptions, we obtain a FCLT for the queue-length process, where the limit is characterized as the pathwise unique solution to a stochastic integral equation with jumps. When the arrivals are renewal and the interruption cycle time is exponential, the limit is a Markov process, being a jump-diffusion process in the QED regime and an O-U process driven by a Levy process in the ED regime (and for infinite-server queues). A stochastic-decompostion property of the steady-state distribution of the limit process in the ED regime (and for infinite-server queues) is obtained.
The influence of sociotropic judgment on public perceptions of trade liberalization : distributional judgment and institutional factors
Creators: name: Lee, Hyunji
Publisher: name: University of British Columbia
Year: 2011

description: This dissertation sheds new light on the question of why some individuals and some countries are more protectionist than others, by applying findings from public opinion studies to the topic. More specifically, by addressing the gap between the predictions of economic trade theories and the findings of public opinion studies, I examine non-economic determinants of individual attitudes toward trade policies, and institutional factors as an intervening variable that could mediate or exacerbate protectionist sentiment. This dissertation consists of five separate papers each of which tackles a different theoretical or empirical puzzle: why is there a discrepancy in views on trade liberalization between economists and the public; why are females more protectionist than males; does more spending on welfare bring about more public support for openness; what explains the recent protectionist backlash in Korea, an export-oriented economy where there is a public consensus on the positive impact of trade on the national economy; and does democratization lead to more economic openness as predicted by factor endowment models? Each chapter provides answers to each puzzle by utilizing three different methods that include survey experiments, survey analyses, and content analyses. The findings of the five papers converge on the following two: (1) positive effects of income growth on support for trade are significantly offset by concerns with the effect of trade liberalization on domestic social and economic arrangements, e.g., increasing inequality and poverty; (2) the negative effects of such communitarian concerns on support for trade are magnified by a lack of public confidence in their government’s effectiveness and responsiveness. The importance of the communitarian critiques of trade liberalization in shaping trade attitudes not only suggests that trade-induced economic growth does not necessarily lead to public support for greater trade openness; but it also suggests that the prediction of the factor endowment models that the electorates (the median voter) in capital scarce countries prefer more openness is flawed. The findings also suggest that new democracies often characterized by weak political institutions and rule of law are not necessarily in a better position than their authoritarian counterparts to garner public support for trade liberalization.
title: Is High Frame-Rate Contrast Enhanced Ultrasound (HiFR-CEUS) consistent with endoscopic SES and MaRIA (Magnetic Resonance Index of Activity) scores in the evaluation of ileal Crohn disease activity?
Creators: name: Dell'Era, Alex
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Abdominal Viscera
subject: Abdomen
subject: Contrast agents
subject: MR
subject: Ultrasound
subject: Contrast agent-intravenous
subject: Technology assessment
subject: Education and training
subject: Prospective
subject: Randomised controlled trial

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: The aim of this research is to compare High Frame-Rate HiFR-CEUS with the bowel magnetic resonance (entero-MR) imaging and endoscopic scores in the evaluation of disease activity for Crohn's disease. In this research we evaluated the morphological...
title: Indonesia Journal on Computing (Indo-JC), Vol. 5 No. 2 (2020): September, 2020
title: September, 2020
titleType: AlternativeTitle
Creators: name: Indonesia Journal On Computing (Indo-JC)
Publisher: name: Indonesia Journal on Computing (Indo-JC)
Year: 2020

description: Apriori Association Rule for Course Recommender system...1-16 Peringkasan Teks Ekstraktif Menggunakan Binary Firefly Algorithm...31-42 Pneumonia Classification from X-ray Images Using Residual Neural Network...43-54 Classifying Skin Cancer in Digital Images Using Convolutional Neural Network with Augmentation...55-66 LBP Advantages over CNN Face Detection Method on Facial Recognition System in NOVA Robot...67-80 A Parallel Implementation of Dual-Pivot Quick Sort for Computers with Small Number of Processors...81-90 Sequence Chunking on Quran in English Translation using Bidirectional Long Short-Term Memory...91-98 Anaphora Resolution on Al-Quran with Indonesian Translation...99-106 The Effect of Information Gain Feature Selection for Hoax Identification in Twitter Using Classification Method Support Vector Machine...107-118 Penerapan Analisis Klaster untuk Seleksi Aset dalam Optimasi Portofolio Investasi Saham...17-30
Linear stochastic fluid networks
Creators: name: Kella, Offer
name: Whitt, Ward
Publisher: name: Columbia University
Year: 1999
Subjects: Stochastic systems
Storage area networks (Computer networks)
Lévy processes
Queuing networks (Data transmission)
Industrial engineering
Probabilities
Queuing theory
Operations research

description: We introduce open stochastic fluid networks that can be regarded as continuous analogues or fluid limits of open networks of infinite-server queues. Random exogenous input may come to any of the queues. At each queue, a c.d.f.-valued stochastic process governs the proportion of the input processed by a given time after arrival. The routeing may be deterministic (a specified sequence of successive queue visits) or proportional, i.e. a stochastic transition matrix may govern the proportion of the output routed from one queue to another. This stochastic fluid network with deterministic c.d.f.s governing processing at the queues arises as the limit of normalized networks of infinite-server queues with batch arrival processes where the batch sizes grow. In this limit, one can think of each particle having an evolution through the network, depending on its time and place of arrival, but otherwise independent of all other particles. A key property associated with this independence is the linearity: the workload associated with a superposition of inputs, each possibly having its own pattern of flow through the network, is simply the sum of the component workloads. As with infinite-server queueing models, the tractability makes the linear stochastic fluid network a natural candidate for approximations.
title: Indonesia Journal on Computing (Indo-JC), Vol. 5 No. 1 (2020): Maret, 2020
title: Maret, 2020
titleType: AlternativeTitle
Creators: name: Indonesia Journal On Computing (Indo-JC)
Publisher: name: Indonesia Journal on Computing (Indo-JC)
Year: 2020

description: Ontology-Based Semantic Search on Tourism Information Search System...103-114 Deteksi Lokasi Pencemaran Air Sungai Citarum Berbasis Internet of Things menggunakan Klasifikasi Naive Bayes...1-14 Implementasi Dempster Shafer dalam Pembentukkan Portofolio Mean Varian...23-32 Eye State Prediction Based on EEG Signal Data Neural Network and Evolutionary Algorithm Optimization...33-44 Klasifikasi Kanker Payudara Menggunakan Residual Neural Network...45-52 Deteksi Spoofing Wajah Manusia Berbasis Video menggunakan Metode Local Derivative Pattern-Three Orthogonal Planes...53-62 Deteksi Helm pada Video Pengendara Sepeda Motor menggunakan Ekstraksi Ciri Histogram of Oriented Gradients...63-72 Pengenalan Aksara Bali Menggunakan Metode Pyramid Histogram of Oriented Gradients...73-84 Determining N-Days Tourist Route Using Swap Operator Based Artificial Bee Colony Algorithm...85-92 Polish Rod Displacement Simulation on Sucker Rod Pump Using the Piecewise-Linear Basis Method...15-22 Performansi Implementasi Paralel OpenMP pada Persamaan Air Dangkal 2D untuk Simulasi Gelombang Runup...93-102
Comparison of the Adsorption Transition for Grafted and Nongrafted Polymers
Creators: name: Möddel, Monika
name: Janke, Wolfhard
name: Bachmann, Michael
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We compare the thermodynamic behavior of a finite single nongrafted polymer near an attractive substrate with that of a polymer grafted to that substrate. After we recently found first-order-like signatures in the microcanonical entropy at the adsorption transition in the nongrafted case, and given the fact that many studies on polymer adsorption in the past have been performed for grafted polymers, the question arises, to what extent and in what way does grafting change the nature of the adsorption transition? This question is tackled here using a coarse-grained off-lattice polymer model and covers not only the adsorption transition but also all other transitions a single polymer near an attractive substrate of varying strengths undergoes. Because of the impact of grafting especially on the translational but also on the conformational entropy of desorbed chains, the adsorption transition is affected the strongest. Our results are obtained by a combined canonical and microcanonical analysis of parallel tempering Monte Carlo data.
description: 8 pages, 6 figures
title: Depth of tumor invasion on MRI -Potential Predictor of cervical lymph node metastases in oral cavity cancers
Creators: name: PENUGANCHIPROLU, MANASA
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Head and Neck
subject: Head and neck
subject: Lymph nodes
subject: MR
subject: Diagnostic procedure
subject: Cancer
subject: Prospective
subject: Observational
subject: Performed at one institution

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: The oral squamous cell carcinoma is one of the rapidly growing oral cancers and is the 6th most common cancers in the world. Squamous cell carcinoma of lower gingivo-buccal complex and tongue are most common cancers in the Indian sub-continent. The...
title: Indonesia Journal on Computing (Indo-JC), Vol. 4 No. 3 (2019): December, 2019
title: December, 2019
titleType: AlternativeTitle
Creators: name: Indonesia Journal On Computing (Indo-JC)
Publisher: name: Indonesia Journal on Computing (Indo-JC)
Year: 2020

description: Deteksi Lokasi Pencemaran Air Sungai Citarum berbasis IoT menggunakan Fuzzy Inference System...1-14 Pembangunan Korpus dari Rangkaian Kata yang Berulang pada Al-Quran...23-36 Implementasi Genetic Algorithm dalam Model ARIMA untuk Memprediksi Observasi Time Series...37-50 Entity Recognition for Quran English Version with Supervised Learning Approach...77-86 Deteksi Kemiripan Dokumen Bahasa Indonesia Menggunakan Algoritma Smith-Waterman dan Algoritma Nazief & Andriani...87-98 Klasifikasi Gender dan Usia berdasarkan Suara Pembicara Menggunakan Hidden Markov Model...99-106 Klasifikasi Sentimen Ulasan Tempat Makan Berbahasa Indonesia dengan Lexicon dan Improved Naive Bayes...107-116 Deteksi Pola Ambiguitas Struktural pada Spesifikasi Kebutuhan Perangkat Lunak menggunakan Pemrosesan Bahasa Alami...51-64 Rayleigh Ritz Cubic Spline method for Displacement Simulation Sucker Rod...15-22 Clustering of Earthquake Prone Areas in Indonesia Using K-Medoids Algorithm...65-76
title: Influence of sorafenib and transcatheter arterial chemoembolization (TACE) on pancreatic volume in patients with advanced hepatocarcinoma.
Creators: name: Belmonte Castán, Ernesto
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Cross-sectional study
subject: Retrospective
subject: Toxicity
subject: Drugs / Reactions
subject: Segmentation
subject: CT
subject: Pancreas
subject: Oncology
subject: Interventional vascular
subject: Oncologic Imaging

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: The aim of this study was to determine the volume of pancreas before and after sorafenib and TACE treatments in patients with advanced hepatocarcinoma without tumor progression. Our hypothesis was that only the pancreas of patients treated with...
title: Using a geo-statistical approach for soil salinity and yield management
title: Hydrology days 2010
titleType: AlternativeTitle
title: AGU hydrology days 2010
titleType: AlternativeTitle
Creators: name: Eldeiry, Ahmed A.
name: Garcia, Luis A.
name: Colorado State University, Publisher
Publisher: name: Mountain Scholar
Year: 2010

description: 2010 annual AGU hydrology days was held at Colorado State University on March 22 - March 24, 2010.
description: Includes bibliographical references.
description: This paper presents a practical method to manage soil salinity and yield in order to obtain maximum economic benefits. The method was applied to a study area located in the south eastern part of the Arkansas River Basin in Colorado where soil salinity is a problem in some areas. The following were the objectives: 1) generate classified maps and the corresponding zones of uncertainty of expected yield potential for the main crops grown in the study area; 2) compare the expected potential productivity of different crops based on the soil salinity conditions; 3) assess the expected net revenue of multiple crops under different soil salinity conditions. Different scenarios of crops and salinity levels were evaluated. Indicator kriging was applied to each scenario to generate maps that show the expected percent yield potential areas and the corresponding zones of uncertainty for each of the different classes. The results of this study show that indicator kriging can be used to generate guidance maps that divide each field into areas of expected percent yield potential based on soil salinity thresholds for different crops. Zones of uncertainty can be quantified by indicator kriging and therefore it can be used for risk assessment of the percent yield potential. Wheat and sorghum show the highest expected yield potential based on the different soil salinity conditions that were evaluated. Expected net revenue for alfalfa and corn are the highest under the different soil salinity conditions that were evaluated.
Near-threshold properties of the electronic density of layered quantum-dots
Creators: name: Ferrón, Alejandro
name: Serra, Pablo
name: Osenda, Omar
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a way to manipulate an electron trapped in a layered quantum dot based on near-threshold properties of one-body potentials. We show that potentials with a simple global parameter allows the manipulation of the wave function changing its spatial extent. This phenomenon seems to be fairly general and could be implemented using current quantum-dot quantum wells technologies and materials if a proper layered quantum dot is designed. The layered quantum dot under consideration is similar to a quantum-dot quantum well device, i.e. consists of a spherical core surrounded by successive layers of different materials. The number of layers and the constituent material are chosen to highlight the near-threshold properties. In particular we show that the near-threshold phenomena can be observed using an effective mass approximation model that describes the layered quantum dot which is consistent with actual experimental parameters.
description: 15 pages, 6 figures, regular article
Heavy-traffic extreme-value limits for Erlang delay models
Creators: name: Pang, Guodong
name: Whitt, Ward
Publisher: name: Columbia University
Year: 2009
Subjects: Queuing theory
Queuing networks (Data transmission)
Limit theorems (Probability theory)
Industrial engineering
Probabilities
Operations research

description: We consider the maximum queue length and the maximum number of idle servers in the classical Erlang delay model and the generalization allowing customer abandonment – the M/M/n + M queue. We use strong approximations to show, under regularity conditions, that properly scaled versions of the maximum queue length and maximum number of idle servers over subintervals [0, t] in the delay models converge jointly to independent random variables with the Gumbel extreme- value distribution in the QED and ED many-server heavy-traffic limiting regimes as n and t increase to infinity together appropriately; we require that tn → ∞ and tn = o(n1/2−ε) as n → ∞ for some ε>0.
title: Diagnostic efficiency of tumor-vessel contact length measurement in the assessment of vessel involvement in patients with hilar cholangiocarcinoma by 128-row multidetector computed tomography
Creators: name: Lesko, Konstantin
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Oncologic Imaging
subject: Abdomen
subject: Biliary Tract / Gallbladder
subject: CT
subject: CT-Angiography
subject: Contrast agent-intravenous
subject: Cancer
subject: Prospective
subject: Diagnostic or prognostic study
subject: Performed at one institution

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Hilar cholangiocarcinoma (HCCA) or Klatskin tumor is a rare malignancy with poor prognosis, arising in theconfluence of the extrahepatic bile ducts in liver hilus [1]. Despite poor prognosis of HCCA, modern surgery accompanied by chemotherapy...
The last departure time from an Mt/G/∞ queue with a terminating arrival process
Creators: name: Goldberg, David Alan
name: Whitt, Ward
Publisher: name: Columbia University
Year: 2008
Subjects: Queuing theory
Queuing networks (Data transmission)
Industrial engineering
Probabilities
Operations research

description: This paper studies the last departure time from a queue with a terminating arrival process. This problem is motivated by a model of two-stage inspection in which finitely many items come to a first stage for screening. Items failing first-stage inspection go to a second stage to be examined further. Assuming that arrivals at the second stage can be regarded as an independent thinning of the departures from the first stage, the arrival process at the second stage is approximately a terminating Poisson process. If the failure probabilities are not constant, then this Poisson process will be nonhomogeneous. The last departure time from an Mt/G/∞ queue with a terminating arrival process serves as a remarkably tractable approximation, which is appropriate when there are ample inspection resources at the second stage. For this model, the last departure time is a Poisson random maximum, so that is possible to give exact expressions and develop useful approximations based on extreme-value theory.
title: Radiological Description of BCG Osteitis and Hematogenous Osteomyelitis Features in Children
Creators: name: Lysenko, Natalia
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Musculoskeletal
subject: Bones
subject: Paediatric
subject: Conventional radiography
subject: CT
subject: Diagnostic procedure
subject: Inflammation
subject: Prospective
subject: Observational
subject: Performed at one institution

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Currently, an increase in the incidence of BCG vaccination-induced bone complications (BCG-osteitis) is registered [1-3]. Besides, according to a certain view, the true prevalence of BCG-osteitis is even higher because it is difficult to identify...
New relation between transverse angular momentum and generalized parton distributions
Creators: name: Leader, Elliot
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: I derive a rigorous relation between the expectation value of the transverse component of the angular momentum of a quark in a transversely polarized nucleon in terms of the Generalized Parton Distributions H and E, namely = 1/2M [P_0 \int dx x E_q(x,0,0) + M \int dx x H_q(x,0,0)] where P_0 is the energy of the nucleon and where "quark" implies the sum of quark and antiquark of a given flavor. A similar relation holds for gluons. The result is remarkably similar to Ji's relation for the case of longitudinal polarization. In this revised version, I have rectified some misleading statements, introduced a more precise notation and specified mpre clearly the meaning of the terms in both the Ji and the new tranverse relation.
description: 6 pages
Stability and Structural Properties of Stochastic Storage Networks
Creators: name: Kella, Offer
name: Whitt, Ward
Publisher: name: Columbia University
Year: 1996
Subjects: Stochastic systems
Lévy processes
Industrial engineering
Probabilities
Queuing theory
Operations research

description: We establish stability, monotonicity, concavity and subadditivity properties for open stochastic storage networks in which the driving process has stationary increments. A principal example is a stochastic fluid network in which the external inputs are random but all internal flows are deterministic. For the general model, the multi-dimensional content process is tight under the natural stability condition. The multi-dimensional content process is also stochastically increasing when the process starts at the origin, implying convergence to a proper limit under the natural stability condition. In addition, the content process is monotone in its initial conditions. Hence, when any content process with nonzero initial conditions hits the origin, it couples with the content process starting at the origin. However, in general, a tight content process need not hit the origin.
title: Small Bowel MRE Reporting: The use of MRE based indices for the quality and quantification of Crohn’s disease activity.
Creators: name: Munday , Charlotte
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Not applicable
subject: Prospective
subject: Pathology
subject: Inflammation
subject: Diagnostic procedure
subject: Audit and standards
subject: MR-Enterography
subject: Gastrointestinal tract
subject: Contrast agents
subject: Colon
subject: GI Tract

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Crohn’s disease (CD) is a chronic inflammatory disease with a relapsing and remitting course which has a profound impact on the patient’s quality of life. Traditionally endoscopy is used to determine disease activity, however this modality has...
title: Indonesia Journal on Computing (Indo-JC), Vol. 4 No. 2 (2019): September, 2019
title: September, 2019
titleType: AlternativeTitle
Creators: name: Indonesia Journal On Computing (Indo-JC)
Publisher: name: Indonesia Journal on Computing (Indo-JC)
Year: 2019

description: September, 2019
description: Pengembangan Sistem Informasi pada Perusahaan Dagang Menggunakan Zachman Framework Studi Kasus : Toko Perlengkapan Pesta Party Partner...1-8 Multi-Factor Authentication Using a Smart Card and Fingerprint (Case Study: Parking Gate)...55-66 Implementasi User Centered Requirements Engineering pada Perancangan Aplikasi Panduan Informasi Pertanian untuk Petani...9-20 Group Recommender System Using Hybrid Filtering for Tourism Domain...21-30 Pemilihan Portofolio dengan Metode Polynomial Goal Programming (PGP) Berdasarkan Momen Tinggi dan Entropi pada Saham JII...31-42 Improving Smart Lighting with Activity Recognition Using Hierarchical Hidden Markov Model...43-54 Sistem Peringatan Dini Gempa Bumi Multi Node Sensor Berbasis Fuzzy Dan Komunikasi IoT...67-80 Smart Packaging Machine dengan Menggunakan Teknologi Internet of Things (IoT) Berbasis Fuzzy Logic untuk Penghematan Daya Listrik...81-92 Smart Packaging Machine (SPANE) berbasis Fuzzy Logic pada Jaringan Internet Of Things (IoT) untuk Optimasi Packing Berat Makanan...93-108 Named Entity Recognition for an Indonesian Based Language Tweet using Multinomial Naive Bayes Classifier...119-126 Analysis of the Commutative Method Approach on English Thesaurus for Developing Synonym Sets...137-146 Pembangunan Synonym Set untuk WordNet Bahasa Indonesia dengan Menggunakan Metode Komutatif...147-156 Pointer Generator dan Coverage Weighting untuk Memperbaiki Peringkasan Abstraktif...169-176 Sistem Pencarian Lintas Ayat Al-Qur'an Berdasarkan Kesamaan Fonetis...177-188 Perbandingan Prediksi Harga Saham dengan model ARIMA dan Artificial Neural Network...189-198 Topic Classification of Islamic Questionand Answer Using Naive Bayes Classifier...199-204 Digital Forensic Analysis on iDevice : Jailbreak iOS 12.1.1 as a Case Study...205-218 Empirical Comparison of Time Series Data Mining Algorithms...109-118 Pembangunan Pensejajaran Kata Monolingual (Monolingual Word Alignment) pada Terjemahan Al-Quran Bahasa Indonesia...127-136 Numerical Simulation of Soliton Collision by using 1D Boussinesq Model...157-168
Markov Chain Models to Estimate the Premium for Extended Hedge Fund Lockups
Creators: name: Derman, Emanuel
name: Park, Kun Soo
name: Whitt, Ward
Publisher: name: Columbia University
Year: 2009
Subjects: Hedge funds
Liquidity (Economics)
Markov processes
Stochastic systems
Industrial engineering
Probabilities
Queuing theory
Operations research

description: A lockup period for investment in a hedge fund is a time period after making the investment during which the investor cannot freely redeem his investment. It is routine to have a one-year lockup period, but recently the requested lockup periods have grown longer. We estimate the premium for such extended lockup, taking the point of view of a manager of a fund of funds, who has to choose between two investments in similar funds in the same strategy category, the first having a one-year lockup and the second having an n-year lockup. Assuming that the manager will rebalance his portfolio of hedge funds on a yearly basis, if permitted, we define the annual lockup premium as the difference between the rates of return from these investments. We develop a Markov chain model to estimate this lockup premium. By solving systems of equations, we fit the Markov chain transition probabilities to three directly observable hedge fund performance measures: the persistence of return, the variance of return and the hedge-fund death rate. The model quantifies the way the lockup premium depends on these parameters. Data from the TASS database are used to estimate the persistence, which is found to be statistically significant.
Limits for Cumulative Input Processes to Queues
Creators: name: Whitt, Ward
Publisher: name: Columbia University
Year: 2000
Subjects: Central limit theorem
Symmetry (Mathematics)
Industrial engineering
Stochastic systems
Lévy processes
Probabilities
Queuing theory
Operations research

description: We establish functional central limit theorems (FCLTs) for a cumulative input process to a fluid queue from the superposition of independent on—off sources, where the on periods and off periods may have heavy-tailed probability distributions. Variants of these FCLTs hold for cumulative busy-time and idle-time processes associated with standard queueing models. The heavy-tailed on-period and off-period distributions can cause the limit process to have discontinuous sample paths (e.g., to be a non-Brownian stable process or more general Lévy process) even though the converging processes have continuous sample paths. Consequently, we exploit the Skorohod M1 topology on the function space D of right-continuous functions with left limits. The limits here combined with the previously established continuity of the reflection map in the M1 topology imply both heavy-traffic and non-heavy-traffic FCLTs for buffer-content processes in stochastic fluid networks.
Comment on integrability in Dijkgraaf-Vafa beta-ensembles
Creators: name: Mironov, A.
name: Morozov, A.
name: Zakirova, Z.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We briefly discuss the recent claims that the ordinary KP/Toda integrability, which is a characteristic property of ordinary eigenvalue matrix models, persists also for the Dijkgraaf-Vafa (DV) partition functions and for the refined topological vertex. We emphasize that in both cases what is meant is a particular representation of partition functions: a peculiar sum over all DV phases in the first case and hiding the deformation parameters in a sophisticated potential in the second case, i.e. essentially a reformulation of some questions in the new theory in the language of the old one. It is at best obscure if this treatment can be made consistent with the AGT relations and even with the quantization of the underlying integrable systems in the Nekrasov-Shatashvili limit, which seem to require a full-scale beta-deformation of individual DV partition functions. Thus, it is unclear if the story of integrability is indeed closed by these recent considerations.
description: 6 pages
title: A generalized deep learning approach for the quantification of the hepatic fat by non-contrast CT imaging
Creators: name: Della Latta, Daniele
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Artificial Intelligence and Machine Learning
subject: Computer applications
subject: Liver
subject: CT
subject: CT-Angiography
subject: Computer Applications-Detection, diagnosis
subject: Screening
subject: Segmentation
subject: Cirrhosis
subject: Retrospective
subject: Not applicable

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: We hypothesized that a 3D convolutional neural network (CNN) trained on multiphase ct (ceCT) could be successfully applied to non-contrast CT (nCT) for the task of liver segmentation taking advantage of the generalization ability of deep learning...
Deliverable D4.3 – Innovative dissemination methods: Good practices and lessons learned
Creators: name: Ross-Hellauer, Tony
name: Vignoli, Michela
name: Viltė Banelytė
name: Bachleitner, Rainer
name: Lucic, Hrvoje
name: Ilire Hasani-Mavriqi
name: Luzi, Daniela
name: Ruggieri, Roberta
name: Pisacane, Lucio
name: Electra Sifacaki
name: Stanciauskas, Vilius
name: Mappet Walker
name: Blümel, Clemens
name: Zendel, Oliver
name: Kraker, Peter
Publisher: name: Zenodo
Year: 2019
Subjects: OpenUP dissemination methods

description: This deliverable report synthesises work across the OpenUP project to investigate innovative dissemination to provide insights into current practices, classify and assess methods and tools, and provide scenario-based case studies. The identified practices and methods have been validated in cooperation with other work packages to analyse the influence of Open Science practices on the impact and visibility of research outputs.
Exact expectation values within Richardson's approach for the pairing Hamiltonian in a macroscopic system
Creators: name: Gorohovsky, Gregory
name: Bettelheim, Eldad
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: BCS superconductivity is explained by a simple Hamiltonian describing an attractive pairing interaction between pairs of electrons. The Hamiltonian may be treated using a mean-field method, which is adequate to study equilibrium properties and a variety of nonequilibrium effects. Nevertheless, in certain nonequilibrium situations, even in a macroscopic rather than a microscopic superconductor, the application of mean-field theory may not be valid. In such cases, one may resort to the full solution of the Hamiltonian, as given by Richardson in the 1960s. The relevance of Richardson's solution to macroscopic nonequilibrium superconductors was pointed out recently based on the existence of quantum instabilities out of equilibrium. It is then of interest to obtain analytical expressions for expectation values between exact eigenvalues of the pairing Hamiltonian within the Richardson approach for macroscopic systems. We undertake this task in the current paper. It should be noted that Richardson's approach yields the full set of eigenvalues of the Hamiltonian, while BCS theory yields only a subset. The results obtained here, then, generalize the familiar BCS expressions (e.g., for the electron occupation or pairing correlations) to cases where the spectrum of excitations diverges from BCS theory (e.g., in cases where the spectrum exhibits multiple gaps).