LLukas22/scidocs huggingface dataset:
Effects of McGill stabilization exercises and conventional physiotherapy on
pain, functional disability and active back range of motion in patients with chronic
non-specific low back pain

[Purpose] The aim of this study was to compare the effects of "McGill stabilization exercises" and "conventional physiotherapy" on pain, functional disability and active back flexion and extension range of motion in patients with chronic non-specific low back pain. [Subjects and Methods] Thirty four patients with chronic non-specific low back pain were randomly assigned to McGill stabilization exercises group (n=17) and conventional physiotherapy group (n=17). In both groups, patients performed the corresponding exercises for six weeks. The visual analog scale (VAS), Quebec Low Back Pain Disability Scale Questionnaire and inclinometer were used to measure pain, functional disability, and active back flexion and extension range of motion, respectively. [Results] Statistically significant improvements were observed in pain, functional disability, and active back extension range of motion in McGill stabilization exercises group. However, active back flexion range of motion was the only clinical symptom that statistically increased in patients who performed conventional physiotherapy. There was no significant difference between the clinical characteristics while compared these two groups of patients. [Conclusion] The results of this study indicated that McGill stabilization exercises and conventional physiotherapy provided approximately similar improvement in pain, functional disability, and active back range of motion in patients with chronic non-specific low back pain. However, it appears that McGill stabilization exercises provide an additional benefit to patients with chronic non-specific low back, especially in pain and functional disability improvement.
Tap-Tap and Pay ( TTP ) : Preventing Man-InThe-Middle Attacks in NFC Payment Using Mobile Sensors

The reader-and-ghost attack is a real concern in mobile NFC payment applications. A malicious reader relays the user's NFC-enabled mobile phone to a remote legitimate reader to charge for a higher amount than what the user expects to pay. Using an NFC shield cannot prevent the attack, since the user consciously instantiates the NFC payment, though without realizing that the reader is controlled by an attacker. Recent solutions generally involve using ambient sensors to measure the ambient properties of the surrounding environment to ensure that the NFC-enabled phone and the reader are at nearby locations. Unfortunately, all these solutions fail completely once the attacker's reader and the legitimate reader are located in the same or similar physical environment. In this paper, we propose the first and currently the only viable technical solution to defeat the reader-and-ghost attack even when the attacker' reader and the legitimate one are located in the same physical environment. Our solution is called "Tap-Tap and Pay" (TTP). It works by asking the user to physically tap the reader twice in succession to initiate an NFC payment. The physical tapping causes random but correlated vibrations at both devices, which are hard to forge (or reproduce) and can be reliably measured by accelerometers. Accordingly, we design the TTP protocol such that the NFC transaction will proceed only if the two vibration signals are found sufficiently similar. As compared with previous solutions, ours is fast, simple to use, easy to deploy, and above all, prevents attacks even if the attacker's reader and the legitimate one are located in the same environment. © 2014 Newcastle University. Printed and published by Newcastle University, Computing Science, Claremont Tower, Claremont Road, Newcastle upon Tyne, NE1 7RU, England. Bibliographical details MEHRNEZHAD, M., HAO, F., SHAHANDASHTI, S.F. Tap-Tap and Pay (TTP): Preventing Man-In-The-Middle Attacks in NFC Payment Using Mobile Sensors [By] M. Mehrnezhad, F. Hao and S. F. Shahandashti Newcastle upon Tyne: Newcastle University: Computing Science, 2014. (Newcastle University, Computing Science, Technical Report Series, No. CS-TR-1428)
Cannabinoids in health and disease

Cannabis sativa L. preparations have been used in medicine for millenia. However, concern over the dangers of abuse led to the banning of the medicinal use of marijuana in most countries in the 1930s. Only recently, marijuana and individual natural and synthetic cannabinoid receptor agonists and antagonists, as well as chemically related compounds, whose mechanism of action is still obscure, have come back to being considered of therapeutic value. However, their use is highly restricted. Despite the mild addiction to cannabis and the possible enhancement of addiction to other substances of abuse, when combined with cannabis, the therapeutic value of cannabinoids is too high to be put aside. Numerous diseases, such as anorexia, emesis, pain, inflammation, multiple sclerosis, neurodegenerative disorders (Parkinson's disease, Huntington's disease, Tourette's syndrome, Alzheimer's disease), epilepsy, glaucoma, osteoporosis, schizophrenia, cardiovascular disorders, cancer, obesity, and metabolic syndrome-related disorders, to name just a few, are being treated or have the potential to be treated by cannabinoid agonists/antagonists/cannabinoid-related compounds. In view of the very low toxicity and the generally benign side effects of this group of compounds, neglecting or denying their clinical potential is unacceptable--instead, we need to work on the development of more selective cannabinoid receptor agonists/antagonists and related compounds, as well as on novel drugs of this family with better selectivity, distribution patterns, and pharmacokinetics, and--in cases where it is impossible to separate the desired clinical action and the psychoactivity--just to monitor these side effects carefully.
Understanding customer knowledge sharing in web-based discussion boards: An exploratory study

Purpose – The proliferation and advance of web-based technologies create expanded opportunities for retailers to gain a better understanding of their customers. However, the success of these web-based discussion boards depends solely on whether customers are willing to share their knowledge and experience with other customers in these discussion boards. Thus, this study aims at identifying the factors that drive knowledge sharing among customers in web-based discussion boards. Design/methodology/approach – An exploratory study with 104 respondents was conducted to identify and categorize the key factors of customer knowledge sharing in web-based discussion boards. Findings – The results indicate that the enjoyment of helping others is the most frequently cited reason for customer knowledge sharing in web-based discussion boards. On the other hand, the lack of knowledge self-efficacy is the mostly cited reason explaining why customers do not want to share knowledge with others. Research limitations/implications – The exploratory analysis suggests that the underlying reasons that motivate and inhibit customers to share are very different. There is a need to integrate multiple theoretical perspectives from across the social and technical domains if this phenomenon is to be better understood. Practical implications – Building upon the findings of this study, some generic guidelines for retailers and web designers for promoting customer sharing in web-based discussion boards are outlined. Originality/value – This research is one of the first studies to use the socio-technical perspective to investigate customer knowledge sharing phenomena in web-based discussion boards.
Orientations to happiness and life satisfaction: the full life versus the empty life

Different orientations to happiness and their association with life satisfaction were investigated with 845 adults responding to Internet surveys. We measured life satisfaction and the endorsement of three different ways to be happy: through pleasure, through engagement, and through meaning. Each of these three orientations individually predicted life satisfaction. People simultaneously low on all three orientations reported especially low life satisfaction. These findings point the way toward a distinction between the full life
Currently used criteria for active surveillance in men with low-risk prostate cancer: an analysis of pathologic features.

BACKGROUND
Active surveillance (AS) represents a treatment option for select patients with low-risk, organ-confined prostate cancer (PCa). In this report, the authors addressed the rates of misclassification associated with the use of 5 different clinical criteria for AS. Misclassification was defined as the presence of either nonorgan-confined disease or high-grade PCa.


METHODS
Between 1992 and 2007, 4885 patients underwent radical prostatectomy (RP) at 1 of 2 European academic centers, and the patients were identified who fulfilled the criteria for AS according to 5 different investigational groups (Hardie et al, Roemeling et al, Choo et al, Klotz, and D'Amico and Coleman). Statistics targeted the rates of misclassification for each of the 5 definitions.


RESULTS
Four thousand three hundred eight patients, 4047 patients, 3993 patients, 2455 patients, and 2345 patients fulfilled the AS criteria of Hardie et al, Roemeling et al, Choo et al, Klotz, and D'Amico and Coleman, respectively. Extracapsular extension was reported in 13.5% to 26% of patients, and seminal vesicle invasion was reported in 2.9% to 8.2% of patients. When PCa with Gleason scores from 8 to 10 at RP was considered high grade, the misclassification rates were 27%, 25%, 25%, 15%, and 14% for the 5 studies, respectively. Conversely, when PCa with Gleason scores from 7 to 10 was considered high grade, the misclassification rates increased to 56%, 55%, 45%, 42%, and 39%, respectively.


CONCLUSIONS
The currently available AS criteria are limited by a high rate of misclassification. The use of more selective AS criteria may reduce the rate of misclassification but also may reduce significantly the percentage of patients who may be considered for AS.
Hepatic granulomas: histological and molecular pathological approach to differential diagnosis--a study of 442 cases.

BACKGROUND/AIMS
The incidence of hepatic granulomas is reported in 2-15% of liver biopsies. This study was carried out to evaluate the incidence and aetiology of hepatic granulomas in a German Institute of Pathology with specialization in liver diseases.


METHODS
A retrospective case review was performed on 12,161 liver biopsies of the Institute of Pathology (University of Cologne) between 1996 and 2004. Aetiology was determined according to histomorphological changes, clinicopathological data and liver tissue polymerase chain reaction (PCR) for detection of diverse putative pathogens in the liver tissue.


RESULTS
Four hundred and forty-two liver biopsies revealed granulomatous lesions (3.63%). Two hundred and fifteen cases (1.77% of all biopsies and 48.64% of granulomatous lesions) were diagnosed as primary biliary cirrhosis. In 37 cases (0.3% of all biopsies and 8.37% of granulomatous lesions), the diagnosis of sarcoidosis was established. A positive PCR result for an infectious pathogen was obtained in 15 samples (3.39%) [Bartonella henselae (n=2), Listeria (n=3), Mycobacterium tuberculosis (n=3), Yersinia pseudotuberculosis (n=1), cytomegalovirus (n=2), Epstein-Barr virus (n=4)]. In six cases, a putative diagnosis was established according to the report of clinical conditions. In 11 cases (2.48%), drugs were the putative causative agent. In 158 cases (36%) a definite diagnosis could not be established.


CONCLUSIONS
Hepatic granulomas have a broad range of underlying aetiologies. With a combined histological, clinical, serological, and molecular approach, we were able to clarify the cause in 64% of the cases. Owing to the diverse prognosis and therapeutic implications, a detailed interdisciplinary workup of all liver biopsies with granulomatous lesions is mandatory.
A detailed observation of variations of the facial artery, with emphasis on the superior labial artery

The reconstruction of lip defects through the use of the Abbė flap and other lip flap procedures involves surgical manipulation of one of the major branches of the facial artery, specifically the superior labial artery (SLA). We examined 284 hemifaces derived from 142 formalin fixed cadavers. Observations regarding the distribution patterns of the facial artery were recognized and categorized into five Types, labeled “A” through “E”. Type A (135, 47.5%): facial artery bifurcates into SLA and lateral nasal (the latter gives off inferior and superior alar and ends as angular); Type B (110, 38.7%): similar to Type A, except lateral nasal terminates as superior alar (angular artery is absent); Type C (24, 8.4%): facial artery terminates as SLA; Type D (11, 3.8%): angular artery arises directly from facial arterial trunk rather than as the termination of lateral nasal, with the facial artery ending as superior alar; Type E (4, 1.4%): facial artery terminates as a rudimentary twig without providing any significant branches. Furthermore, we were able to categorize variations within each Type. Sub-Type variations were examined in Types A through C (A: 1–7; B: 1–4; C: 1–3). Our aim was to equip both the anatomist and surgeon with a more thorough understanding of the vasculature of the face, as well as to enable plastic surgeons to have a more confident approach to reconstructive procedures in this region.
Dynamic h-index: The Hirsch index in function of time

When we have a group of papers and when we fix the present time we can determine the unique number h being the number of papers that received h or more citations while the other papers received a number of citations which is not larger than h. In this paper we determine the time dependence of the h-index. This is important to describe the expected career evolution of a scientist’s work or of a journal’s production in a fixed year. We use the earlier established cumulative n th citation distribution. We show that ( ) ( ) 1 1 t h 1 a T   = 1 Permanent address
Improving the Decoupled Double SRF PLL for grid connected power converters

One of the critical issues in control of grid connected power converters is synchronization with the utility voltage. Decoupled Double Synchronous Reference Frame Phase-Locked Loop (DDSRF-PLL) can detect positive and negative sequences of voltage under unbalanced conditions. However, its dynamic response is very sensitive to phase angle jumps in the voltage which results in large deviation in the estimated frequency. This paper investigates conventional DDSRF PLL and hybrid Decoupled Alfa Beta (DAB) PLL, and then proposes a new DDSRF PLL that outperforms two mentioned PLLs. The proposed PLL is a combination of DDSRF PLL and dual second-order generalized integrator (DSOGI) that estimates grid frequency with lesser overshoot than those of two other PLLs. The performance of the proposed PLL is verified by using time domain simulation studies in the DIgSILENT PowerFactory software environment.
Broken bar detection in single-phase reciprocating compressors

Broken rotor bar detection in induction motors using current signature analysis gives good results when the motor load is almost constant. However, if the load torque is oscillating, or it is a function of the rotor position, the current spectrum will contain spectral components which coincides with the components produced by rotor faults. Thus, rotor fault detection in these loads, such as compressors and other reciprocating loads, is very difficult. A new strategy for broken rotor bar diagnosis in single-phase induction motors is presented in this paper. This strategy is based on the analysis of the auxiliary winding voltage. The proposed strategy allows the diagnostic of rotor faults even with pulsating load torque. Simulation and experimental results are presented.
Detecting Supply Chain Innovation Potential for Sustainable Development

In a world of limited resources, it could be argued that companies that aspire to be good corporate citizens need to focus on making best use of resources. User value and environmental harm are created in supply chains and it could therefore be argued that company business ethics should be extended from the company to the entire value chain from the first supplier to the last customer. Starting with a delineation of the linkages between business ethics, corporate sustainability, and the stakeholder concept, this article argues that supply chains generally have a great innovation potential for sustainable development. This potential could be highlighted with system thinking and the use of change management knowledge, promoting not only innovations within technology but also within organizational improvement. We propose process models and performance indicators as means of highlighting improvement potential and thus breaking down normative business ethics’ requirements to an opertionalizable corporate level: Good business ethics should focus on maximizing stakeholder value in relation to harm done. Our results indicate that focusing on supply chains reveals previously unknown innovation potential that seems to be related to limited system understanding. The assumption is that increased visibility of opportunities will act as a driver for change. Results also highlight the importance of focusing on sustainability effects of the core business and clearly relating value created to harm done.
Diagnostic accuracy of 64-slice computed tomography coronary angiography: a prospective, multicenter, multivendor study.

OBJECTIVES
This study sought to determine the diagnostic accuracy of 64-slice computed tomographic coronary angiography (CTCA) to detect or rule out significant coronary artery disease (CAD).


BACKGROUND
CTCA is emerging as a noninvasive technique to detect coronary atherosclerosis.


METHODS
We conducted a prospective, multicenter, multivendor study involving 360 symptomatic patients with acute and stable anginal syndromes who were between 50 and 70 years of age and were referred for diagnostic conventional coronary angiography (CCA) from September 2004 through June 2006. All patients underwent a nonenhanced calcium scan and a CTCA, which was compared with CCA. No patients or segments were excluded because of impaired image quality attributable to either coronary motion or calcifications. Patient-, vessel-, and segment-based sensitivities and specificities were calculated to detect or rule out significant CAD, defined as >or=50% lumen diameter reduction.


RESULTS
The prevalence among patients of having at least 1 significant stenosis was 68%. In a patient-based analysis, the sensitivity for detecting patients with significant CAD was 99% (95% confidence interval [CI]: 98% to 100%), specificity was 64% (95% CI: 55% to 73%), positive predictive value was 86% (95% CI: 82% to 90%), and negative predictive value was 97% (95% CI: 94% to 100%). In a segment-based analysis, the sensitivity was 88% (95% CI: 85% to 91%), specificity was 90% (95% CI: 89% to 92%), positive predictive value was 47% (95% CI: 44% to 51%), and negative predictive value was 99% (95% CI: 98% to 99%).


CONCLUSIONS
Among patients in whom a decision had already been made to obtain CCA, 64-slice CTCA was reliable for ruling out significant CAD in patients with stable and unstable anginal syndromes. A positive 64-slice CTCA scan often overestimates the severity of atherosclerotic obstructions and requires further testing to guide patient management.
Future railway services-oriented mobile communications network

The future development of the railway is highly desired to evolve into a new era where infrastructure, trains, travelers, and goods will be increasingly interconnected to provide high comfort, with optimized door-to-door mobility at higher safety. For this vision, it is required to realize seamless high data rate wireless connectivity for railways. To improve the safety and comfort of future railways, wireless communications for railways are required to evolve from only voice and traditional train control signaling services to various high data rate services including critical high-definition (HD) video and other more bandwidth-intensive passenger services, such as onboard and wayside HD video surveillance, onboard real-time high data rate services, train multimedia dispatching video streaming, railway mobile ticketing, and the Internet of Things for railways. Corresponding mobile communications network architecture under various railway scenarios including inter-car, intra-car, inside station, train-to-infrastructure and infrastructure- to-infrastructure are proposed in this article. Wireless coverage based on massive MIMO for railway stations and train cars is proposed to fulfill the requirement of high-data-rate and high spectrum efficiency. The technical challenges brought by the massive MIMO technique are discussed as well.
Massive MIMO for Drone Communications: Applications, Case Studies and Future Directions

Unmanned aerial vehicles (UAVs), or drones, are proliferating. Several applications, such as surveillance, disaster management, and drone racing, place high requirements on the communication with the drones – in terms of throughout, reliability, 3D connectivity, and latency. Existing wireless technologies, notably WiFi, that are currently used for drone communications are limited to short ranges and lowmobility situations. A new, scalable technology is needed to meet future demands. Massive MIMO, a promising technology component of emerging 5G cellular networks, has the potential to meet these requirements. Specifically, Massive MIMO offers significant range extensions, support for fast-moving drones, and the possibility to spatially multiplex entire swarms of drones communicating simultaneously. DRONE TECHNOLOGY IS PROLIFERATING During the past decades, unmanned aerial vehicles (UAVs) in the form of drones have been predominantly used for military applications such as battlefield and airspace surveillance, and border patrol. More recently, due to technological advancements in battery and control technology, and miniaturization of electronics, the use of drones for civilian applications is exploding. Such applications include traffic and crowd monitoring, search-and-rescue operations during earthquakes, flooding and other disasters, inspection of non-reachable areas, and the transportation of goods [1]–[3]. Inexpensive light-weight drones are widely available for diverse personal uses such as aerial photography and drone racing. Several 5G use cases for drones were identified by 3GPP [4]: broadband access to under-developed areas, hot-spot coverage during sporting events, and rapidly deployable “on-demand” densification. More applications are likely to emerge [5]. The potential of multi-drone networks is particularly significant. Many small drones can be deployed in a short time to cover a large geographical area. In many applications, a goal for the drones would be to stream high-quality imagery or videos to a ground station (GS) within stipulated reliability and latency constraints. As the required throughputs are very high, existing wireless technologies are incapable of providing the required service. In this article, we make the case that Massive MIMO [6], an emerging 5G physical-layer technology, can enable communication with large multi-drone networks that stream big amounts of real-time data to the ground. In a recent paper, [7], we presented various rather technical results on Massive MIMO for aerial communications. The object of the article at hand is to summarize important conclusions ar X iv :1 71 1. 07 66 8v 1 [ cs .I T ] 2 1 N ov 2 01 7