LLukas22/scidocs huggingface dataset:
A Test-Driven Approach to Establishing & Managing Agile Product Lines

Test Driven Development (TDD) is an agile method that emphasizes writing tests before writing code as a means of 1) assuring the satisfaction of customer requirements, and 2) reinforcing good design habits. While the first objective is usually accomplished by acceptance tests, the second objective is achieved by unit tests. The tests also serve as a multilevel cohesive reference of the system specifications. We propose the use of this referencing mechanism – test artifacts – to establish and manage agile product lines. In this paper, we delve into some of the issues that need to be tackled before test artifacts are relied on as a driving force for reuse in product lines. These issues include establishing a framework for reuse, tests comparability, test traceability, test refactoring and test versioning. We also discuss the suitability of acceptance tests and unit tests as reusable artifacts, and we present a preliminary study to analyze their utilization.
Massive prolapse of the urethral mucosa following periurethral injection of calcium hydroxylapatite for stress urinary incontinence

The injection of bulking agents into the urethral submucosa is designed to create artificial urethral cushions that can improve urethral coaptation and hence restore continence. Ideally, a urethral bulking agent should be non-immunogenic and biocompatible, leading to minimal inflammatory and fibrotic response. The authors present a case report of a granulomatous reaction leading to urethral prolapse, 3 months after the transurethral injection of calcium hydroxylapatite. To our knowledge, this is the first granulomatous reaction described after calcium hydroxylapatite injection.
Prevalence of depression amongst medical students: a meta-analysis.

CONTEXT
Medical schools are known to be stressful environments for students and hence medical students have been believed to experience greater incidences of depression than others. We evaluated the global prevalence of depression amongst medical students, as well as epidemiological, psychological, educational and social factors in order to identify high-risk groups that may require targeted interventions.


METHODS
A systematic search was conducted in online databases for cross-sectional studies examining prevalences of depression among medical students. Studies were included only if they had used standardised and validated questionnaires to evaluate the prevalence of depression in a group of medical students. Random-effects models were used to calculate the aggregate prevalence and pooled odds ratios (ORs). Meta-regression was carried out when heterogeneity was high.


RESULTS
Findings for a total of 62 728 medical students and 1845 non-medical students were pooled across 77 studies and examined. Our analyses demonstrated a global prevalence of depression amongst medical students of 28.0% (95% confidence interval [CI] 24.2-32.1%). Female, Year 1, postgraduate and Middle Eastern medical students were more likely to be depressed, but the differences were not statistically significant. By year of study, Year 1 students had the highest rates of depression at 33.5% (95% CI 25.2-43.1%); rates of depression then gradually decreased to reach 20.5% (95% CI 13.2-30.5%) at Year 5. This trend represented a significant decline (B = - 0.324, p = 0.005). There was no significant difference in prevalences of depression between medical and non-medical students. The overall mean frequency of suicide ideation was 5.8% (95% CI 4.0-8.3%), but the mean proportion of depressed medical students who sought treatment was only 12.9% (95% CI 8.1-19.8%).


CONCLUSIONS
Depression affects almost one-third of medical students globally but treatment rates are relatively low. The current findings suggest that medical schools and health authorities should offer early detection and prevention programmes, and interventions for depression amongst medical students before graduation.
Implant survival of the most common cemented total hip devices from the Nordic Arthroplasty Register Association database

Background and purpose - According to previous Nordic Arthroplasty Register Association (NARA) data, the 10-year implant survival of cemented total hip arthroplasties (THAs) is 94% in patients aged 65-74 and 96% in patients aged 75 or more. Here we report a brand-level comparison of cemented THA based on the NARA database, which has not been done previously. Patients and methods - We determined the rate of implant survival of the 9 most common cemented THAs in the NARA database. We used Kaplan-Meier analysis with 95% CI to study implant survival at 10 and 15 years, and Cox multiple regression to assess survival and hazard ratios (HRs), with revision for any reason as endpoint and with adjustment for age, sex, diagnosis, and femoral head material. Results - Spectron EF THA (89.9% (CI: 89.3-90.5)) and Elite THA (89.8% (CI: 89.0-90.6)) had the lowest 10-year survivorship. Lubinus (95.7% survival, CI: 95.5-95.9), MS 30 (96.6%, CI: 95.8-97.4), and C-stem THA (95.8%, CI: 94.8-96.8) had a 10-year survivorship of at least 95%. Lubinus (revision risk (RR) = 0.77, CI: 0.73-0.81), Müller (RR =0.83, CI: 0.70-0.99), MS-30 (RR =0.73, CI: 0.63-0.86), C-stem (RR =0.70, CI: 0.55-0.90), and Exeter Duration THA (RR =0.84, CI: 0.77-0.90) had a lower risk of revision than Charnley THA, the reference implant. Interpretation - The Spectron EF THA and the Elite THA had a lower implant survival than the Charnley, Exeter, and Lubinus THAs. Implant survival of the Müller, MS 30, CPT, and C-stem THAs was above the acceptable limit for 10-year survival.
Inter-organizational information sharing of customer data in retail

As massive online retailers are putting increasing pressure on the traditional brick-and-mortar retailers, new ways to compete for customers is needed. Identifying customers’ behavior and understanding their needs could be a crucial way for firms to improve their competitive advantage. One way to better understand customers could be for retailers to collaborate and aggregate their customer data in order to gain more holistic understandings of customers. This thesis examines on a high-level how customer data is used in retail today and what new value can be generated by collaborating and aggregating customer data, both for businesses as well as for consumers. It then goes on to identify structures of customer data sharing that we observe today and what the underlying factors are for each structure. By projecting how these factors will evolve over time, different scenarios are drawn up of what we might expect to see in the retail industry in the future in terms of customer data sharing. The implications of those projections could possibly open up for new business opportunities, both for entrepreneurs as well as incumbent retailers. Thesis Supervisor: Stuart E. Madnick Title: The John Norris Maguire Professor of Information Technologies and Professor of Engineering Systems
Introduction to Arabic Speech Recognition Using CMUSphinx System

demonstrate the possible adaptability of this system to Arabic voice recognition.
The effects of NBPTS-certified teachers on student achievement

In this study we consider the efficacy of a relatively new and widely accepted certification system for teachers established by the National Board for Professional Teaching Standards (NBPTS). To address the limitations in past research on the subject, we utilize a unique database covering the universe of teachers and students in Florida for a four-year span to determine the relationship between NBPTS certification and the impact of teachers on student test scores from both low-stakes and high-stakes exams. Contrary to some previous studies, we find evidence that NBPTS certification provides a positive signal of a teacher’s contribution to student achievement only in a few isolated cases. Our results do reinforce evidence from previous research that the process of becoming NBPTS certified does not increase teacher productivity. While there is some evidence that NBPTS-certified teachers who are paid to act as mentors enhance the productivity of their colleagues, the effectiveness of non-NBPTS certified teachers does not increase with increases in the total number of NBPTS-certified teachers in the same school. JEL Classification: I21, J24
Petrological and geochemical characteristics,Ar-Ar geochronology study and their tectonic significance of Triassic volcanic rocks in southern Lancangjiang zone

Triassic volcanic rocks are widespread in southern Lancangjiang zone of Sanjiang area,Middle-Late Triassic volcanic sequences exposed in full in Yunxian area in the north of southern Lancangjiang zone,can be divided into three formations as Middle Triassic Manghuai Formation(T2m),Late Triassic Xiaodingxi Formation(T3x) and Late Triassic Manghuihe Formation(T3mh) from the bottom to up,Acid volcanics mainly erupted in Manghuai Formation,formed a rhyolite and pyroclastic rock assemblage,Xiaodingxi Formation developed basic-intermediate lavas mixed with pyroclastic rocks,Rhyolite pyroclastic rocks and basalt coexist in Manghuihe Formation,showed "bimodal" volcanic features,Geochemical characteristics indicate that Triassic volcanic rocks from southern Lancangjiang zone have dual characteristics of arc volcanic rocks and continental intraplate volcanic rocks,suggesting that their formation environment is transition-type continental margin orogenic belts,Ar-Ar dating is carried on quartz andesite collected from Jinghong in the south of southern Lancangjiang zone and yields the plateau age of 236.7±2.2Ma,which belong to Middle Triassic,With the dating results,the main collision stage of Lancang River is inferred in Early Triassic,Middle Triassic and early Late Triassic are respectively the stress relaxation stage after collision and continued subduction stage of oceanic basin,Until the end of Late Triassic,subduction ended,Lancang River Ocean closed.
Design and implementation of a domestic solar-wind hybrid energy system

In parallel to developing technology, demand for more energy makes us seek new energy sources. The most important application field of this search is renewable energy resources. Wind and solar energy have being popular ones owing to abundant, ease of availability and convertibility to the electric energy. This work covers realization of a hybrid renewable energy system for a domestic application, which runs under a microcontroller to utilize the solar and wind power. This project is implemented in accordance with available line-electricity. Batteries in the system are charged by either wind power via a small alternator or solar power via an MPPT module. System control relies mainly on microcontroller. Power resources and loads in the system are monitored and controlled in real time.
Disordered Sleep and Myopia Risk among Chinese Children

PURPOSE
Disordered sleep and myopia are increasingly prevalent among Chinese children. Similar pathways may be involved in regulation of both sleep cycles and eye growth. We therefore sought to examine the association between disordered sleep and myopia in this group.


METHODS
Urban primary school children participating in a clinical trial on myopia and outdoor activity underwent automated cycloplegic refraction with subjective refinement. Parents answered questions about children's sleep duration, sleep disorders (Children's Sleep Habits Questionnaire [CSHQ]), near work and time spent outdoors.


RESULTS
Among 1970 children, 1902 (96.5%, mean [standard deviation SD] age 9.80 [0.44] years, 53.1% boys) completed refraction and questionnaires. Myopia < = -0.50 Diopters was present in both eyes of 588 (30.9%) children (1329/3804 = 34.9% of eyes) and 1129 children (59.4%) had abnormal CSHQ scores (> 41). In logistic regression models by eye, odds of myopia < = -0.50D increased with worse CSHQ score (Odds Ratio [OR] 1.01 per point, 95% Confidence Interval [CI] [1.001, 1.02], P = 0.014) and more night-time sleep (OR 1.02, 95% CI [1.01, 1.04, P = 0.002], while male sex (OR 0.82, 95% CI [0.70, 0.95], P = 0.008) and time outdoors (OR = 0.97, 95% CI [0.95, 0.99], P = 0.011) were associated with less myopia. The association between sleep duration and myopia was not significant (p = 0.199) for total (night + midday) sleep.


CONCLUSIONS
Myopia and disordered sleep were both common in this cohort, but we did not find consistent evidence for an association between the two.


TRIAL REGISTRATION
clinicaltrials.gov NCT00848900.
Perceived Maternal Parenting Self-Efficacy (PMP S-E) tool: development and validation with mothers of hospitalized preterm neonates.

AIM
This paper is a report of a study to develop and test the psychometric properties of the Perceived Maternal Parenting Self-Efficacy tool.


BACKGROUND
Mothers' perceptions of their ability to parent (maternal parenting self-efficacy) is a critical mechanism guiding their interactions with their preterm newborns. A robust measure is needed which can measure mothers' perceptions of their ability to understand and care for their hospitalized preterm neonates as well as being sensitive to the various levels and tasks in parenting.


METHODS
Using a mixed sampling methodology (convenience or randomized cluster control trial) 165 relatively healthy and hospitalized mother-preterm infant dyads were recruited in 2003-2005 from two intensive care neonatal units in the United Kingdom (UK). Mothers were recruited within the first 28 days after giving birth to a preterm baby. The Perceived Maternal Parenting Self-Efficacy tool, which is made up of 20 items representing four theorized subscales, was tested for reliability and validity.


RESULTS
Internal consistency reliability of the Perceived Maternal Parenting Self-Efficacy tool was 0.91, external/test-retest reliability was 0.96, P<0.01. Divergent validity using the Maternal Self-Report Inventory was r(s)=0.4, P<0.05 and using the Maternal Postnatal Attachment Scale was r(s)=0.31, P<0.01.


CONCLUSION
The Perceived Maternal Parenting Self-Efficacy tool is a psychometrically robust, reliable and valid measure of parenting self-efficacy in mothers of relatively healthy hospitalized preterm neonates. Although application outside the UK will require further cross-cultural validation, the tool has the potential to provide healthcare professionals with a reliable method of identifying mothers of preterm hospitalized babies who are in need of further support.
Criminal Thinking and Identity in Male White-Collar Offenders:

Thirty-four male white-collar offenders without a prior history of non-white-collar crime, 23 male white-collar offenders with at least one prior arrest for a non-white-collar crime, and 66 male non-white-collar offenders housed in a minimum security federal prison camp completed the Psychological Inventory of Criminal Thinking Styles and Social Identity as a Criminal scale and were rated on the Lifestyle Criminality Screening Form–Revised. Significant group differences were noted on the Psychological Inventory of Criminal Thinking Styles Self-Assertion/ Deception scale, Social Identity as a Criminal Centrality subscale, Social Identity as a Criminal In-Group Ties subscale, and Lifestyle Criminality Screening Form–Revised, which showed that white-collar offenders with no prior history of non-white-collar crime registered lower levels of criminal thinking, criminal identification, and deviance than white-collar offenders previously arrested for non-white-collar crimes.
Relationship Between Sense of Coherence and School Connectedness Among Online Public High School Students

The purpose of this study was to determine the relationship between sense of coherence and school connectedness among online public high school students. The connection students make with their school can affect their well-being based on the stress they perceive from the school and its environment. The variables of interest were the sense of coherence score and the school connectedness score. A bivariate correlational research study was performed to determine if there was a significant relationship between the two variables. The sample was 83 high school students enrolled in an online public school. Each completed the Sense of Coherence – Orientation to Life Questionnaire (SOC-13) and the School Connectedness Survey. Data was analyzed using the Pearson’s Product Moment r to examine the relationship between the two variables. Results of the study found a negative correlation between the sense of coherence score, sense of coherence comprehensibility score, sense of coherence manageability score and school connectedness score. No correlation was found between the sense of coherence meaningfulness score and school connectedness score. Recommendations for future research include examining different populations and socioeconomics of the participants. A qualitative study is also recommended to examine motivation and academic support. This study will help online public high school administrators and faculty understand students like those enrolled in their schools and develop programs to help promote school connectedness and reduce stress.
Effective Endovascular Treatment of Calcified Femoropopliteal Disease With Directional Atherectomy and Distal Embolic Protection: Final Results of the DEFINITIVE Ca++ Trial

OBJECTIVES
The purpose of the DEFINITIVE Ca(++) study was to evaluate the safety and effectiveness of directional atherectomy and distal embolic protection, used together to treat moderate to severely calcified femoropopliteal lesions.


BACKGROUND
Despite advances in endovascular treatment modalities, treatment of calcified lesions remains a challenge.


METHODS
A total of 133 subjects with 168 moderate to severely calcified lesions were enrolled. Lesions were treated with directional atherectomy devices, coupled with distal embolic protection.


RESULTS
The 30-day freedom from MAE rate was 93.1%. Per angiographic core laboratory assessment, the primary effectiveness endpoint (≤50% residual diameter stenosis) was achieved in 92.0% (lower confidence bound of 87.6%) of lesions. By core lab analysis, these results did not achieve the success criteria (90%) for the primary effectiveness objective. Per site assessment, the objective was met with the endpoint being achieved in 97.0% (lower confidence bound 93.8%). A mean residual diameter stenosis of 33.3% was achieved with the directional atherectomy device. This was further decreased to 24.1% with the use of adjunctive therapy. The proportion of asymptomatic subjects [Rutherford Clinical Category (RCC) = 0] increased from 0% at baseline to 52.3% at the 30-day follow-up visit. In total, 88.5% of subjects experienced an improvement of one or more Rutherford categories.


CONCLUSIONS
The results of the DEFINITIVE Ca++ study demonstrate that the SilverHawk and TurboHawk atherectomy devices are safe and effective in the endovascular treatment of moderate to severely calcified lesions in the superficial femoral and/or popliteal arteries when used with the SpiderFX distal embolic protection device.
Ontology based combined approach for sentiment classification

the objects, such as movie reviews, book reviews, and product reviews etc. Sentiment analysis is the mining the sentiment or opinion words and identification and analysis of the opinion and arguments in the text. In this paper, we proposed an ontology based combination approach to enhance the exits approaches of sentiment classifications and use supervised learning techniques for classifications.
Binocular function in school children with reading difficulties

Prior findings suggest that poor readers tend to have poor binocular vision skills, but data on the binocular abilities of children with poor reading skills are lacking. Our aim was to characterize distance and near horizontal heterophoria, distance and near horizontal fusional vergence ranges, accommodative convergence/accommodation (AC/A) ratio, near point of convergence, and stereopsis in poor-reading school-age children without dyslexia selected from a non-clinical population. We conducted a cross-sectional study on 87 poor readers and 32 control children (all 8-13 years of age) in grades three to six recruited from eleven elementary schools in Madrid, Spain. With best spectacle correction in each subject, distance and near horizontal heterophoria measurements were obtained using the von Graefe technique, distance and near horizontal fusional vergence ranges were obtained using Risley rotary prisms, the AC/A ratio was measured using the gradient method, near point of convergence (NPC) was evaluated by the standard push-up technique using a transilluminator, and stereoacuity was tested with the Randot stereotest. Mean distance base-in break and base-in recovery values were nearly 2 Δ lower (p < 0.01) in the poor readers than those recorded in the control group. However, mean distance base-out vergences (blur, break and recovery), mean distance and near horizontal heterophoria, mean near horizontal fusional vergence ranges, mean AC/A ratio, mean near point of convergence (NPC), and mean stereoacuity did not differ significantly between the poor readers and controls. This study provides information on the binocular ability of children with poor reading skills but without dyslexia. Our findings suggest reduced distance base-in break and base-in recovery, such that distance fusional vergence ranges should always be assessed in children who complain of reading difficulties.
Should elderly patients be screened for their 'falls risk'? Validity of the STRATIFY falls screening tool and predictors of falls in a large acute hospital.

Only 35% of the hospital inpatients who were prescribed opioid analgesia experienced adequate pain control. Poor pain relief was significantly associated with the presence of side effects, higher pain intensity, prescription of regular opioids without as-needed doses and lower received opioid doses. Young and middle-aged patients were significantly more likely to report side effects than older patients. Pain intensity did not vary across age groups. Older patients were prescribed and administered lower doses of opioids than middle-aged patients.
On converting community detection algorithms for fuzzy graphs in Neo4j

An essential feature of large scale free graphs, such as the Web, protein-to-protein interaction, brain connectivity, and social media graphs, is that they tend to form recursive communities. The latter are densely connected vertex clusters exhibiting quick local information dissemination and processing. Under the fuzzy graph model vertices are fixed while each edge exists with a given probability according to a membership function. This paper presents Fuzzy Walktrap and Fuzzy Newman-Girvan, fuzzy versions of two established community discovery algorithms. The proposed algorithms have been applied to a synthetic graph generated by the Kronecker model with different termination criteria and the results are discussed. Keywords-Fuzzy graphs; Membership function; Community detection; Termination criteria; Walktrap algorithm; NewmanGirvan algorithm; Edge density; Kronecker model; Large graph analytics; Higher order data