LLukas22/scidocs huggingface dataset:
Coresets and Sketches

Geometric data summarization has become an essential tool in both geometric approximation algorithms and where geometry intersects with big data problems. In linear or near-linear time large data sets can be compressed into a summary, and then more intricate algorithms can be run on the summaries whose results approximate those of the full data set. Coresets and sketches are the two most important classes of these summaries. A coreset is a reduced data set which can be used as proxy for the full data set; the same algorithm can be run on the coreset as the full data set, and the result on the coreset approximates that on the full data set. It is often required or desired that the coreset is a subset of the original data set, but in some cases this is relaxed. A weighted coreset is one where each point is assigned a weight, perhaps different than it had in the original set. A weak coreset associated with a set of queries is one where the error guarantee holds for a query which (nearly) optimizes some criteria, but not necessarily all queries; a strong coreset provides error guarantees for all queries. A sketch is a compressed mapping of the full data set onto a data structure which is easy to update with new or changed data, and allows certain queries whose results approximate queries on the full data set. A linear sketch is one where the mapping is a linear function of each data point, thus making it easy for data to be added, subtracted, or modified. These definitions can blend together, and some summaries can be classified as either or both. The overarching connection is that the summary size will ideally depend only on the approximation guarantee but not the size of the original data set, although in some cases logarithmic dependence is acceptable. We focus on five types of coresets and sketches: shape-fitting (Section 49.1), density estimation (Section 49.2), high-dimensional vectors (Section 49.3), highdimensional point sets / matrices (Section 49.4), and clustering (Section 49.5). There are many other types of coresets and sketches (e.g., for graphs [AGM12] or Fourier transforms [IKP14]) which we do not cover for space or because they are less geometric.
Conceptualizing Lennox–Gastaut Syndrome as a Secondary Network Epilepsy

Lennox-Gastaut Syndrome (LGS) is a category of severe, disabling epilepsy, characterized by frequent, treatment-resistant seizures, and cognitive impairment. Electroencephalography (EEG) shows characteristic generalized epileptic activity that is similar in those with lesional, genetic, or unknown causes, suggesting a common underlying mechanism. The condition typically begins in young children, leaving many severely disabled with recurring seizures throughout their adult life. Scalp EEG of the tonic seizures of LGS is characterized by a diffuse high-voltage slow transient evolving into generalized low-voltage fast activity, likely reflecting sustained fast neuronal firing over a wide cortical area. The typical interictal discharges (runs of slow spike-and-wave and bursts of generalized paroxysmal fast activity) also have a "generalized" electrical field, suggesting widespread cortical involvement. Recent brain mapping studies have begun to reveal which cortical and subcortical regions are active during these "generalized" discharges. In this critical review, we examine findings from neuroimaging studies of LGS and place these in the context of the electrical and clinical features of the syndrome. We suggest that LGS can be conceptualized as "secondary network epilepsy," where the epileptic activity is expressed through large-scale brain networks, particularly the attention and default-mode networks. Cortical lesions, when present, appear to chronically interact with these networks to produce network instability rather than triggering each individual epileptic discharge. LGS can be considered as "secondary" network epilepsy because the epileptic manifestations of the disorder reflect the networks being driven, rather than the specific initiating process. In this review, we begin with a summation of the clinical manifestations of LGS and what this has revealed about the underlying etiology of the condition. We then undertake a systematic review of the functional neuroimaging literature in LGS, which leads us to conclude that LGS can best be conceptualized as "secondary network epilepsy."
Knowledge convergence and collaborative learning

This paper operationalized the notion of knowledge convergence and assessed quantitatively how much knowledge convergence occurred during collaborative learning. Knowledge convergence was defined as an increase in common knowledge where common knowledge referred to the knowledge that all collaborating partners had. Twenty pairs of college students collaborated to learn a science text about the human circulatory system. Comparisons of individual pre-test and post-test performance revealed that students shared more knowledge pieces and mental models after collaboration. Although the amount of convergence was modest, analyses showed that collaborative interaction was responsible for the increase in common knowledge. The increase in common knowledge was observed in knowledge that was never stated in the learning text as well as in knowledge that was explicitly presented in the text. The amount of convergence was related to interaction such that real pairs shared more knowledge than nominal pairs, and more interactive pairs shared more inferred knowledge than less interactive pairs. Collaborative dialogues and learning artifacts (e.g., drawings) also indicated that common knowledge was constructed during collaboration. Possible reasons for the discrepancy between the impression of strong convergence assumed in the literature and the results of this study are discussed along with the need to develop a more comprehensive understanding of the notion that includes its process, outcome, and sources of convergence.
Intravenous Itraconazole vs. Amphotericin B Deoxycholate for Empirical Antifungal Therapy in Patients with Persistent Neutropenic Fever

BACKGROUND
Amphotericin B dexoycholate is currently the standard empirical antifungal therapy for neutropenic patients with hematologic malignancies and who also have persistent fever that does not respond to antibacterial therapy. The antifungal triazoles offer a potentially safer and effective treatment alternative to Amphotericin B dexoycholate.


METHODS
We assessed the efficacy and safety of intravenous itraconazole, as compared with the efficacy and safety of amphotericin B deoxycholate, as an empirical antifungal therapeutic agent in a matched case-control clinical trial from June 2004 to August 2005.


RESULTS
Efficacy was evaluated in 96 patients (48 received itraconazole and 48 received amphotericin B deoxycholate) and all the patients who received the study drugs were evaluated for safety. The baseline demographic characteristics were well matched. The overall success rates were 47.9% for itraconazole and 43.8% for amphotericin B deoxycholate (% difference: 4.1% [95% confidence interval for the difference: -15.8 to 24]), which fulfilled the statistical criteria for the non-inferiority of itraconazole. The proportions of patients who survived for at least seven days after discontinuation of therapy or who were prematurely discontinued from the study were not significantly different between the two groups. The rates of breakthrough fungal infections and resolution of fever during neutropenia were similar in both groups. More patients who received amphotericin B deoxycholate developed nephrotoxicity, hypokalemia or infusion-related events than did those patients who received itraconazole (nephrotoxicity: 16.7% vs. 1.8%, hypokalemia: 66.7% vs. 24.6%, and infusion-related events: 41.7% vs. 3.5%, respectively).


CONCLUSIONS
Intravenous itraconazole is as effective as amphotericin B deoxycholate and it is generally better tolerated than amphotericin B deoxycholate when it is given as empirical antifungal therapy for Korean patients with persistent neutropenic fever.
Changes in the adherens junctions of human endothelial cells infected with spotted fever group rickettsiae

Rickettsiae of the spotted fever group are obligately intracellular bacteria that primarily infect the vascular endothelium, invade adjacent cells propelled by actin polymerization, and cause severe systemic diseases. Endothelial dysfunction and vascular leakage develop as a consequence; this effect is the pathophysiological mechanism that explains most clinical manifestations. Here we report that rickettsial infection of cultured primary human endothelial cells is associated with the formation of gaps in the interendothelial adherens junctions, occurring late during the course of in vitro infections but not early, even when rickettsial loads are significant.
MORPHOLOGICAL CLASSIFICATION OF GALAXIES INTO SPIRALS AND NON-SPIRALS

The aim of this master's thesis is the classification of images of galaxies according to their morphological features using computer vision and artificial intelligence techniques. We deal specifically with the shape of the galaxy in this project. The galaxies are broadly categorized into 3 categories according to their shape: circular, elliptical and spiral. Out of these 3 possible shapes, correctly classifying the spiral shape is the most challenging. This is mostly due to the noisy images of the galaxies and partly due to the shape itself, as spiral can easily be mistaken for an ellipse or even a circle. Thus we focus on classifying the images into only 2 categories: spiral and non-spiral. The first phase of the thesis addresses the process of feature extraction from images of the galaxies, and the second phase uses artificial intelligence and machine learning methods to create a system that categorizes galaxies based on the extracted features. The specific methods used for classification are boosting, logistic regression and deep neural networks. We evaluate these techniques on data from the Galaxy Zoo project [1] that is freely available to anyone. The languages used are C++ (OpenCV) and Python.
Search log analysis: What it is, what's been done, how to do it

The use of data stored in transaction logs of Web search engines, Intranets, and Web sites can provide valuable insight into understanding the information-searching process of online searchers. This understanding can enlighten information system design, interface development, and devising the information architecture for content collections. This article presents a review and foundation for conducting Web search transaction log analysis. A methodology is outlined consisting of three stages, which are collection, preparation, and analysis. The three stages of the methodology are presented in detail with discussions of goals, metrics, and processes at each stage. Critical terms in transaction log analysis for Web searching are defined. The strengths and limitations of transaction log analysis as a research method are presented. An application to log client-side interactions that supplements transaction logs is reported on, and the application is made available for use by the research community. Suggestions are provided on ways to leverage the strengths of, while addressing the limitations of, transaction log analysis for Web-searching research. Finally, a complete flat text transaction log from a commercial search engine is available as supplementary material with this manuscript. © 2006 Elsevier Inc. All rights reserved.
Papanicolaou test utilization and frequency of screening opportunities among women diagnosed with cervical cancer

BACKGROUND
Although the importance of Papanicolaou (Pap) smear test screening in reducing the incidence of cervical cancer is well established, in 1994-95 one in 4 women in Manitoba aged 18 to 69 years reported never having had a Pap test or not having had a Pap test in the last 3 years. The objectives of this study were to examine the screening history of women in Manitoba diagnosed with invasive cervical cancer and to explore whether opportunities for screening were missed.


METHODS
In this case-control study women aged 18 years and older who resided in Manitoba and were diagnosed with invasive cervical cancer between 1989 and 2001 were each matched by age and area of residence to 5 controls, (N = 4009). Conditional logistic regression analyses were used to examine the association between Pap test utilization and the likelihood of diagnosis with invasive cervical cancer. Generalized linear models using the negative binomial distribution were used to assess the association between cancer status and rates of prior Pap testing and of opportunities to be screened. Logistic generalized estimating equation models were used for the analysis of physician characteristics.


RESULTS
Forty-six percent of women in Manitoba diagnosed with invasive cervical cancer and 67% of the control group had received a Pap test in the 5 years before the case's diagnosis. After adjustment for age, income and residence, the rate of Pap testing was significantly higher in the control group (rate ratio [RR] = 1.57, 95% confidence interval [CI] 1.44-1.73). Conversely, when cervical cancer was the outcome, women who had not had Pap tests were more likely to be diagnosed with invasive cervical cancer (odds ratio [OR] = 2.77, 95% CI 2.30-3.30) than women who did have a Pap test. Although women diagnosed with invasive cervical cancer had fewer Pap tests, they had had as many opportunities to be screened as controls (RR = 1.04, 95% CI 0.96-1.12). Compared with urban family physicians, rural family physicians were less likely to provide Pap tests (OR = 0.68, 95% CI 0.58-0.80) and specialists were more likely to provide Pap tests (OR = 1.70, 95% CI 1.30-2.22).


CONCLUSIONS
Women who were diagnosed with invasive cervical cancer in the province of Manitoba, Canada, had fewer Pap tests but the same frequency of opportunities to be screened as matched controls. These results reinforce the need to educate women about cervical cancer screening and the importance of receiving Pap tests.
Migrating to internet-based e-commerce: Factors affecting e-commerce adoption and migration at the firm level

Web technology has enabled e-commerce. However, in our review of the literature, we found little research on how firms can better position themselves when adopting e-commerce for revenue generation. Drawing upon technology diffusion theory, we developed a conceptual model for assessing e-commerce adoption and migration, incorporating six factors unique to e-commerce. A series of propositions were then developed. Survey data of 1036 firms in a broad range of industries were collected and used to test our model. Our analysis based on multi-nominal logistic regression demonstrated that technology integration, web functionalities, web spending, and partner usage were significant adoption predictors. The model showed that these variables could successfully differentiate non-adopters from adopters. Further, the migration model demonstrated that web functionalities, web spending, and integration of externally oriented inter-organizational systems tend to be the most influential drivers in firms’ migration toward e-commerce, while firm size, partner usage, electronic data interchange (EDI) usage, and perceived obstacles were found to negatively affect ecommerce migration. This suggests that large firms, as well as those that have been relying on outsourcing or EDI, tended to be slow to migrate to the internet platform. # 2005 Elsevier B.V. All rights reserved.
Repeatability of central and peripheral corneal thickness measurements with the iVue 100 optical coherence tomographer

The cornea is the main refracting surface of the eye1,2,3, comprised of five layers with a sixth corneal layer positioned between the stroma and Descemet’s membrane being proposed.4 The cornea serves many functions which include acting as a convex refracting surface, serving as a barrier against foreign bodies and aiding in stabilisation of the tear film.2 The average central corneal thickness, in a non-diseased eye, is expected to be 0.56 mm in young persons (under 25 years of age) and increases to around 0.57 mm by the age of 65 years.1 Corneal thickness, however, is not uniform as it is generally thinner in the centre, thickens towards the periphery reaching almost 0.7 mm and exhibits diurnal variations.1 The stromal layer makes up almost 90% of the total corneal thickness.5
VSA-HD: From the enumeration analysis to the prototypical implementation

This paper presents design, implementation and performance of a new Variable Stiffness Actuator (VSA) based on Harmonic Drives (VSA-HD), which is an improvement over past work reported in [1], [2]. While previous prototypes have been developed to demonstrate the effectiveness of the variable stiffness actuation principle and the possibility to develop a compact and reliable actuator, the VSA-HD has been obtained by exploring the performance of the enumeration of all VSA made out a basic components set (i.e. two prime movers, two harmonic-drive gears, and the output shaft) and all the feasible interconnections between them as presented in [3]. Along this enumeration the VSA-HD conceptual layout has been selected as being good trade-off between mechanical complexity and overall performance. This paper discusses in depth the actuator mechanical layout, highlighting the main characteristics of the new design. A model for the actuator is introduced and validated by experimental results.
Survey of the agent-based approach to intelligent manufacturing

Purpose: Summary of the state-of-the-art of the Distributed Artificial Intelligence applied to Intelligent Manufacturing. Main applications are presented along with different technologies applied in these areas. Design/methodology/approach: Intelligent Manufacturing area was split into many segments, which require different approach to intelligent problem solving. Multiagent systems negotiation needs were analysed and cooperation issues in the form of clustering, cloning, and learning were analysed in search for the relevant tools. Findings: Detailed review of the approach to development of the agent based Intelligent Manufacturing from the fundamental considerations to the latest hands-on developments. Research limitations/implications: Many presented technologies call for detailed study before they can be implemented in practice. Originality/value: Thorough review of the Distributed Artificial Intelligence approach to current agile manufacturing needs. Key technologies are pointed out along with the main areas in which they can be implemented, and which require further research.
Adaptive Fractional PID Controller for Robot Manipulator

 *Intelligent Research Group, Babol (Noushirvani) University of Technology, Faculty of Electrical and Computer Engineering, P.O. Box 47135-484, Babol, Iran,( r.ranjbar@nit.ac.ir) **Hamedan university of Technology, Faculty of Electrical Engineering,(hdelavary@gmail.com),Hamedan, Iran *** Department of Electrical, Electronic and Automation Engineering, Industrial Engineering School,University of Extremadura, Badajoz, Spain **** Department of Mathematics, Faculty of Science, University of Jordan, Amman 11942, Jordan
Prevention of venous thrombosis by warfarin after permanent transvenous leads implantation in high-risk patients.

BACKGROUND
The incidence of venous lesions following transvenous cardiac device implantation is high. Previous implantation of temporary leads ipsilateral to the permanent devices, and a depressed left ventricular ejection fraction have been associated with an increased risk of venous lesions, though the effects of preventive strategies remain controversial. This randomized trial examined the effects of warfarin in the prevention of these complications in high-risk patients.


METHOD
Between February 2004 and September 2007, we studied 101 adults who underwent a first cardiac device implantation, and who had a left ventricular ejection fraction < or =0.40, or a temporary pacing system ipsilateral to the permanent implant, or both. After device implantation, the patients were randomly assigned to warfarin to a target international normalized ratio of 2.0-3.5, or to placebo. Clinical and laboratory evaluations were performed regularly up to 6 months postimplant. Venous lesions were detected at 6 months by digital subtraction venography.


RESULTS
Venous obstructions of various degrees were observed in 46 of the 92 patients (50.0%) who underwent venography. The frequency of venous obstructions was 60.4% in the placebo, versus 38.6% in the warfarin group (P = 0.018), corresponding to an absolute risk reduction of 22% (relative risk = 0.63; 95% confidence interval = 0.013-0.42).


CONCLUSIONS
Warfarin prophylaxis lowered the frequency of venous lesions after transvenous devices implantation in high-risk patients.
Prevalence of metabolic syndrome among qassim university personnel in saudi arabia.

OBJECTIVE
to estimate the prevalence of metabolic syndrome among Qassim university personnel in Saudi Arabia using the definition proposed by NCEP ATPIII.


METHODS
a cross sectional study that included all male university staff of different ages and careers. 560 individuals participated in this study with a response rate of 85%. For all participants, the data collected were sociodemographic characteristics, past history or receiving medication for diabetes or hypertension, smoking habits, physical activity, and measurements necessary to identify metabolic syndrome.


RESULTS
Prevalence of metabolic syndrome was 31.4%. The prevalence was found to show a steady increase with increasing age, BMI and serum cholesterol. General obesity measured by BMI was the most common component associated with the syndrome where 75% of participants suffered from overweight and obesity. Participants with high-density lipoprotein below protective level constituted 73.6%, while those with total cholesterol and triglyceride above clinically normal level constituted 60.0% & 46.4% respectively. Elevated fasting plasma glucose and hypertension were the least common. After adjustment, factors found to be associated with metabolic syndrome were being a Saudi national, smoking, not doing regular exercise, being obese having total serum cholesterol above 180 mg/dl, and age groups above 40 years.


CONCLUSION
Almost a third of the university personnel have metabolic syndrome and therefore they are at higher risk for both cardiovascular diseases and diabetes mellitus. Similar studies are required among a wider range of subjects to assess the scope of the problem in Saudi Arabia.
Diversity of T Cells Restricted by the MHC Class I-Related Molecule MR1 Facilitates Differential Antigen Recognition.

A characteristic of mucosal-associated invariant T (MAIT) cells is the expression of TRAV1-2(+) T cell receptors (TCRs) that are activated by riboflavin metabolite-based antigens (Ag) presented by the MHC-I related molecule, MR1. Whether the MR1-restricted T cell repertoire and associated Ag responsiveness extends beyond these cells remains unclear. Here, we describe MR1 autoreactivity and folate-derivative reactivity in a discrete subset of TRAV1-2(+) MAIT cells. This recognition was attributable to CDR3β loop-mediated effects within a consensus TRAV1-2(+) TCR-MR1-Ag footprint. Furthermore, we have demonstrated differential folate- and riboflavin-derivative reactivity by a diverse population of "atypical" TRAV1-2(-) MR1-restricted T cells. We have shown that TRAV1-2(-) T cells are phenotypically heterogeneous and largely distinct from TRAV1-2(+) MAIT cells. A TRAV1-2(-) TCR docks more centrally on MR1, thereby adopting a markedly different molecular footprint to the TRAV1-2(+) TCR. Accordingly, diversity within the MR1-restricted T cell repertoire leads to differing MR1-restricted Ag specificity.