nils-herrmann/clean_scirepeval huggingface dataset:
Profit maximizing logistic regression modeling for customer churn prediction
Venue: 2015 IEEE International Conference on Data Science and Advanced Analytics (DSAA)
Year: 2015

The selection of classifiers which are profitable is becoming more and more important in real life situations such as customer churn management campaigns in the telecommunication sector. In previous works, the expected maximum profit (EMP) metric has been proposed, which explicitly takes the cost of offer and the customer lifetime value (CLV) of retained customers into account. It thus permits the selection of the most profitable classifier, which better aligns with business requirements of end users and stake holders. However, modelers are currently limited to applying this metric in the evaluation step. Hence, we expand on the previous body of work and introduce a classifier that incorporates the EMP metric in the construction of a classification model. Our technique, called ProfLogit, explicitly takes profit maximization concerns into account during the training step, rather than the evaluation step. The technique is based on a logistic regression model which is trained using a genetic algorithm (GA) By means of an empirical benchmark study applied to real life data sets, we show that ProfLogit generates substantial profit improvements compared to the classic logistic model for many data sets. In addition, profit maximized coefficient estimates differ considerably in magnitude from the maximum likelihood estimates.
Cellular Multiuser Two Way Relay Network With Cochannel Interference and Channel Estimation Error: Performance Analysis and Optimization
Venue: IEEE Transactions on Vehicular Technology
Year: 2018

In this paper, we study the impacts of cochannel interference (CCI) and channel estimation error (CEE) on the performance of a cellular multiuser two way relay network. The network comprises of one <inline formula> <tex math notation="LaTeX"$N_{a}/tex math>/inline formula> antenna base station (BS) <inline formula> <tex math notation="LaTeX"$M$/tex math>/inline formula> single antenna users, and one <inline formula> <tex math notation="LaTeX"$L$/tex math>/inline formula> antenna relay with <inline formula> <tex math notation="LaTeX"$N_{r}/tex math>/inline formula> number of interferers. In particular, by employing antenna selection at the relay, we propose beamforming and antenna selection transmission schemes at the BS with user scheduling in the presence of CEE and CCI. Then, we derive the tight closed form lower bound expressions for the overall outage probability under Nakagami <italic>m</italic> fading. We also deduce the asymptotic outage expressions in the high signal to noise ratio regime, from which the impacts of CEE and CCI on the achievable diversity order are highlighted. Moreover, using the asymptotic expressions, three optimization problems to minimize the outage probability are formulated and solved: first, optimal power allocation (OPA) with fixed relay location. Specifically, we develop two OPA approaches, namely, OPA I and OPA II. OPA I allocates the total power appropriately at each terminal, whereas OPA II allocates the fixed half of the total power at the relay and remaining power to base station and users; second, optimal relay location with fixed power allocation; and third, jointly optimal power allocation and relay location. Our results reveal that the OPA I outperforms OPA II, irrespective of different channel/system parameters, interferers, and relay locations. In addition, we demonstrate that the effect of interferers at the relay can be ignored if we allocate sufficient power to the base station and users. It is also shown that the CEE and CCI can severely degrade the outage performance, and even reduce the diversity order to zero. Further, it is highlighted that the impact of CCI can be alleviated by increasing the number of relay antennas. The numerical and simulation results validate our analytical findings, and also demonstrate that the antenna selection scheme offers comparable outage performance as beamforming scheme.
A new approach to posterior contraction rates via Wasserstein dynamics.
Year: 2020

This paper presents a new approach to the classical problem of quantifying posterior contraction rates (PCRs) in Bayesian statistics. Our approach relies on Wasserstein distance, and it leads to two main contributions which improve on the existing literature of PCRs. The first contribution exploits the dynamic formulation of Wasserstein distance, for short referred to as Wasserstein dynamics, in order to establish PCRs under dominated Bayesian statistical models. As a novelty with respect to existing approaches to PCRs, Wasserstein dynamics allows us to circumvent the use of sieves in both stating and proving PCRs, and it sets forth a natural connection between PCRs and three well known classical problems in statistics and probability theory: the speed of mean Glivenko Cantelli convergence, the estimation of weighted Poincar\'e Wirtinger constants and Sanov large deviation principle for Wasserstein distance. The second contribution combines the use of Wasserstein distance with a suitable sieve construction to establish PCRs under full Bayesian nonparametric models. As a novelty with respect to existing literature of PCRs, our second result provides with the first treatment of PCRs under non dominated Bayesian models. Applications of our results are presented for some classical Bayesian statistical models, e.g. regular parametric models, infinite dimensional exponential families, linear regression in infinite dimension and nonparametric models under Dirichlet process priors.
Integrating Dynamic Material Flow Analysis and Computable General Equilibrium Models for Both Mass and Monetary Balances in Prospective Modeling: A Case for the Chinese Building Sector.
Venue: Environmental science technology
Year: 2019

Integrated Assessment Models based on Computable General Equilibrium (IAM/CGE) and dynamic Material Flow Analysis (dynamic MFA) are two most widely used prospective model families to assess large scale and long term socioeconomic metabolism (SEM) and inform sustainable SEM transition. The latter approach could complement the former by a more explicit understanding of service provision, in use stocks, and material cycles in a mass balanced framework. In this paper, we demonstrated this by integrating the dynamic MFA and CGE model approaches for the Chinese building sector from 2012 to 2030. Our results revealed the impacts of building stock dynamics on sectoral and economy wide CO2 emissions: lower service saturation levels and later saturation time of building stock development could free up investment on buildings and accumulatively save up to 25.4 Gt in embodied CO2 emissions of the building construction sector, representing a 2.7 fold of 2012 countrywide CO2 emissions. However, the save ups are partly compensated by an increase of embodied CO2 emissions in the other sectors due to economy wide rebound effect (ca. 18.8 Gt or about 74% The integrated model we developed could help ensure both mass and monetary balances, explore rebound effects in prospective modeling, and thus better understand the economy wide consequences of infrastructure development.
Inside a Chinese Communist Municipal Newspaper: Purges at the Beijing Daily
Year: 2014

The Beijing Daily, the flagship media outlet of the Beijing Municipal Party, was one of the most influential newspapers established in the early years of the People's Republic of China. The newspaper's principal purpose was to propagate the remarkable achievements of the Chinese Communist Party and to demonstrate the superiority of the Chinese socialist system over the capitalist one. Newly available archival sources reveal a depressing and disturbing story behind the facade of authoritative reporting: an interlocking system of control of editorial management, stringent censorship, skillful manipulation of news, and carefully selected readers' letters in praise of the Communist regime. In the early 1960s, in contrast to the harmonious picture of Chinese society depicted by the newspaper, senior editorial staff were caught in the middle of life and death ideological infighting between the radical Maoists and the pragmatists in the central Party leadership. The staff used a variety of techniques double talk, fence sitting, paying lip service to the official lines and conducting self criticism to navigate through the perilous political shoals. But they were eventually purged by the Maoists during the Cultural Revolution for siding with the pragmatists. Chinese journalists, including the Beijing Daily staff who worked in the system, lived a precarious life in the authoritarian environment.
Towards Optimal Transport for Quantum Densities
Year: 2021

An analogue of the quadratic Wasserstein (or Monge Kantorovich) distance between Borel probability measures on R has been defined in [F. Golse, C. Mouhot,  (2015) 165 205] for density operators on L2(Rd) and used to estimate the convergence rate of various asymptotic theories in the context of quantum mechanics. The present work proves a Kantorovich type duality theorem for this quantum variant of the Monge Kantorovich or Wasserstein distance, and discusses the structure of optimal quantum couplings. Specifically, we prove that optimal quantum couplings involve a gradient type structure similar to the Brenier transport map (which is the gradient of a convex function) or more generally, to the subdifferential of a l.s.c. convex function as in the Knott Smith optimality criterion (see Theorem 2.12 in [C. Villani: "Topics in Optimal Transportation"  2003]
Accelerating magnetic resonance imaging via deep learning
Venue: 2016 IEEE 13th International Symposium on Biomedical Imaging (ISBI)
Year: 2016

This paper proposes a deep learning approach for accelerating magnetic resonance imaging (MRI) using a large number of existing high quality MR images as the training datasets. An off line convolutional neural network is designed and trained to identify the mapping relationship between the MR images obtained from zero filled and fully sampled k space data. The network is not only capable of restoring fine structures and details but is also compatible with online constrained reconstruction methods. Experimental results on real MR data have shown encouraging performance of the proposed method for efficient and accurate imaging.
Graphs of lattices in representations of finite groups
Year: 2017

This thesis work is motivated by the Langlands program, which relates objects from number theory and representation theory. In particular it is motivated by the compatibility of the local and global cases, especially in the mod p case. Given a finite group G, E a finite extension of Qp with ring of integers OE, uniformizer pE, V a finite dimensional E vector space and r G AutE(V an absolutely irreducible representation, we associate to r the following directed graph: its vertices are homothety classes of lattices in V and there is an edge from (the class of) L to L' when pEL L' L and the quotient L/L' is irreducible. We also label the edge according to the isomorphism class of L/L' The central theme of this thesis is the study of stable lattices in p adic representations and their corresponding graphs. In particular, we show certain properties of these associated graphs, including finiteness, connectedness, a duality property and that the length of a cycle is a multiple of the number of the Jordan Holder factors. Moreover, we restrict our attention to certain families of representations arising from admissible representations of GL2 of a p adic field and show further properties of their graphs. In the case where r is of principal series type we compute the bound, that is we find an explicit integer c and the lattice L in V such that all lattices L' in V up to homothety satisfy p EL L' L. In the case where r is of tame principal series type we compute the graphs and investigate their properties. We also compute graphs for certain representations of interest, where most of them are obtained using Magma. The Magma code is attached in the thesis.
Injection region propagation outside of geosynchronous orbit
Year: 2010

Using radial alignments of the Polar and Geotail satellites with the Los Alamos National Laboratory (LANL) fleet of geosynchronous observations, we investigate the radial propagation of the dispersionless substorm injection region outside 6.6 RE. We compare the delay between injection onset observed at geosynchronous orbit and a second spacecraft in the same meridian (within 1 hr of Magnetic Local Time (MLT) but at a different radial distance. Our results are consistent with earlier studies showing predominantly Earthward propagation of the substorm injection region at or near geosynchronous orbit. However, observations with spacecraft located further down tail (R ~9 RE) conclusively show that tailward propagation of the dispersionless injection region must also occur. A statistical study of events using 10 years of Polar, Geotail, and LANL observations shows that dispersionsless injections are most likely to initiate at radial distances of 6.6 9 RE. Injections typically start at this location and expand radially inward toward geosynchronous orbit and outward into the midtail central plasma sheet. Implications of these results on injection region models are discussed.
Asymmetry markers in discourse The expressive meaning of bitte please
Year: 2009

The article puts forward an analysis of the German expressive marker bitte 'please/there (you are) that does not treat it as a politeness marker or modifier on directive speech acts, pace Levinson (1983) nor as an explicit marker of directive illocutionary force, pace Searle (1979) Instead, we take the expressive element bitte to indicate speaker hearer asymmetries in epistemic, circumstantial or deontic authority, independently of sentence type and illocutionary force. The analysis in terms of asymmetry marking explains why German bitte has a wider distribution than English please, and why it can trigger attenuating effects (politeness) as well as strengthening effects.
Mining source code repositories with boa
Venue: SPLASH '13
Year: 2013

Mining source code has become a common task for researchers and yielded significant benefits for the software engineering community. Mining source code however is a very difficult and time consuming task. The Boa language and infrastructure was designed to ease mining of project and revision metadata. Recently Boa was extended to support mining source code and currently contains source code for over 23k Java projects, including full revision histories. In this demonstration we pose source code mining tasks and give solutions using Boa. We then execute these programs via our web based infrastructure and show how to easily make the results available for future researchers.
IMPLEMENTASI SAK ETAP DALAM PENYUSUNAN LAPORAN KEUANGAN PADA USAHA MIKRO KECIL DAN MENENGAH (UMKM) TOKO SOUVENIR KHAS DAERAH ABIDSYAH
Year: 2016

Standar Akuntansi Keuangan Entitas Tanpa Akuntabilitas Publik (SAK ETAP) merupakan standar akuntansi keuangan yang ditetapkan untuk kemudahan penyusunan dan penyajian laporan keuangan bagi UMKM. Informasi yang disajikan dalam laporan keuangan dapat memberikan kemudahan dalam bantuan penyaluran kredit bagi lembaga kreditor kepada UMKM. Penelitian ini dirancang untuk menghasilkan suatu format laporan keuangan sederhana berbasis SAK ETAP bagi UMKM. Objek penelitian ini adalah UMKM Toko Souvenir Khas Daerah Abidsyah yang berlokasi di Kota Pontianak yang bergerak di bidang penjualan barang kerajinan khas daerah Kalimantan Barat. Tujuan penelitian ini adalah untuk mengetahui kesesuaian antara laporan keuangan yang dimiliki oleh UMKM dengan laporan keuangan SAK ETAP. Penelitian ini adalah penelitian kualitatif dan teknik pengumpulan data yang digunakan adalah melalui observasi, wawancara, dokumentasi dan studi kepustakaan. Hasil penelitian yang dilakukan menyimpulkan bahwa laporan keuangan UMKM Toko Souvenir Khas Daerah Abidsyah belum menerapkan SAK ETAP. Hal ini dikarenakan UMKM hanya menyediakan laporan laba rugi yang sederhana dalam laporan keuangannya. Faktor yang menyebabkan SAK ETAP belum diterapkan dalam penyajian laporan keuangan adalah kurangnya pemahaman akuntansi dari pemilik dan karyawan serta kurangnya partisipasi dari pemerintah untuk melakukan sosialisasi dan pelatihan terhadap UMKM mengenai SAK ETAP.  UMKM, SAK ETAP, Laporan keuangan
Conical connection adjustment in prosthetic abutments obtained by different techniques
Venue: Journal of clinical and experimental dentistry
Year: 2019

The goal of this study is to compare the misfit >150um) generated once the restoration, made by different techniques, is retained to a single conical implant.  are embedded each one perpendicularly to an horizontal surface of the 1x1x2cm poliuretan resin model. The 15 samples obtained are divided in 5 groups depending on the framework process (n=3) 1/casting, 2/overcasting, 3/Ti base, 4/milling and 5/laser sintering. The cobalt chromium alloy frameworks are screw retained to their respective implants to a 30 Ncm torque. Once it is retained the framework to the implant, the next step is to section the sample in half with a diamond saw and verify the correct fit with a stereomicroscope, measuring 4 distances in each side (A, B, C and D) Data is submitted to one way analysis of variance (ANOVA)  According to equality of variances, significant differences are found in A and B measures (p=0,000 in left side in both groups and, p=0,007 and p=0,001 in right side) In C and D, there are not statistical differences (p=0,586 and p=0,110 in left side and, p=0,101 and p=0,089 in right side) However, once it has realized ANOVA test, only C retains the hypothesis and accepts independence.  More samples are needed to conclude reliable statements. However, what it is observed is that milled group presents the best marginal fit. Overcasted and Ti Base abutments also have good results above casted ones, and, sintered groups has the lowest result. Although, all systems have gaps below 150 um, so all of them are good options for prosthetic rehabilitation. Conical implants, abutment connection, misfit.
Caracterisation des phenomenes physiques par analyse parcimonieuse des signaux transitoires
Year: 2015

Les signaux transitoires, de par leur unicite, sont tres difficiles a caracteriser. Ils se rencontrent partout et sont generalement le reflet d'un phenomene physique tres complexe traduisant de nombreuses informations telles que le signal a l'origine, les effets de la propagation dans le milieu considere et aussi les effets induits par les capteurs. Ils peuvent aussi bien correspondre a un phenomene de communication entre animaux, qu'etre le reflet d'un defaut dans un systeme electrique ou hydraulique par exemple. Tout ceci rend leur etude tres difficile, mais aussi primordiale. De nombreuses techniques en traitement du signal ont ete developpees ces dernieres annees pour les etudier: elles reposent souvent sur des approches statistiques, des approches projectives sur differents dictionnaires et des techniques auto adaptatives. Toutes ces methodes presentent des avantages et des inconvenients, puisqu'elles permettent souvent de les detecter correctement, neanmoins leur caracterisation a des fins de classification et de discrimination reste compliquee. Cette these s'inscrit dans cette optique et propose de nouvelles approches d'etude des transitoires. Apres un rapide descriptif des techniques d'etude des signaux transitoires, ce travail s'interessera dans un premier temps a la representation des signaux ayant des composantes frequentielles variant tres rapidement. De maniere generale l'utilisation des distributions generalisees a temps complexe presente un cadre d'analyse adequat, mais il est limite aux signaux possedant une bande passante etroite, nous proposons dans une premiere partie d'etendre cette utilisation a des signaux possedant une bande passante plus large en appliquant un changement d'echelle des signaux. Une deuxieme partie s'interessera davantage a l'extraction de signaux a modulation de phase dans le contexte d'un melange de bruit non stationnaire et d'autres signaux coherents. Ceci sera effectue par des operateurs de warping couple a des techniques de debruitage basee sur la compression de donnees. Le troisieme chapitre s'interessera aux techniques guidees par les donnees basees sur la representation des signaux en diagrammes de phase. La contribution principale porte sur la diversite des lags qui permet en effet de mettre en evidence les effets des operateurs de temps echelles, mais aussi de modification d'amplitude entre des signaux. Nous developperons donc des methodes permettant de mettre en evidence ces proprietes. Finalement, les travaux presentes dans les premiers chapitres seront developpes dans le cadre de quatre domaines applicatifs qui sont la segmentation d'ECG, la caracterisation de transitoires electriques, un cas d'acoustique passive et l'etude de signaux acoustiques en milieu immerge. Nous terminerons enfin par une conclusion et quelques perspectives de travail.
ComBat Seq: batch effect adjustment for RNA Seq count data
Year: 2020

The benefit of integrating batches of genomic data to increase statistical power in differential expression is often hindered by batch effects, or unwanted variation in data caused by differences in technical factors across batches. It is therefore critical to effectively address batch effects in genomic data. Many existing methods for batch effect adjustment assume continuous, bell shaped Gaussian distributions for data. However in RNA Seq studies where data are skewed, over dispersed counts, this assumption is not appropriate and may lead to erroneous results. Negative binomial regression models have been used to better capture the properties of counts. We developed a batch correction method, ComBat Seq, using negative binomial regression. ComBat Seq retains the integer nature of count data in RNA Seq studies, making the batch adjusted data compatible with common differential expression software packages that require integer counts. We show in realistic simulations that the ComBat Seq adjusted data result in better statistical power and control of false positives in differential expression, compared to data adjusted by the other available methods. We further demonstrated in a real data example where ComBat Seq successfully removes batch effects and recovers the biological signal in the data.
Triazine mediated covalent antibiotic grafting on cotton fabrics as a modular approach for developing antimicrobial barriers
Venue: Cellulose
Year: 2019

New antimicrobial textiles were prepared through direct chemical linkage of bioactive molecules eugenol and fluoroquinolone derivatives, onto the surface of cotton fabrics. The attachment through a triazine moiety minimizes the leaching of the antimicrobial molecule into the surroundings of the material. Bacterial efficacy against Staphylococcus aureus and Pseudomonas aeruginosa was studied. The treated textile with fluoroquinolone demonstrated bacteriostatic antimicrobial effects having a tendency to decrease the population of S. aureus in the planktonic form. A significant effect was also observed in the prevention of S. aureus biofilm formation and in its ability to kill bacteria within a preformed biofilm. Eugenol modified fabric was also active in the process of eradicating preformed P. aeruginosa biofilms. Further, in vitro assays using human dermal fibroblast cells indicate no effects on cell proliferation and viability, and in vivo tests in a murine skin wound model showed no increase of IL 6 for full thickness wounds that were in contact with the fabrics.