LLukas22/scidocs huggingface dataset:
Implementing tablet PCs in schools: Students' attitudes and opinions

In this study, the attitudes, expectations and views of 206 students in four high schools within the scope of the FAT_ IH project in Turkey were assessed regarding tablet PC technology after six months of a pilot plan that included the distribution of tablet PCs to students. The research questions of this study are whether there is a meaningful difference between tablet PC use by male and female students and the effect of computer and Internet by students on attitudes toward tablet PC use. Qualitative and quantitative data collection tools were used in the research. The Computer Attitude Measure for Young students (CAMYS) developed by Teo and Noyes (2008) was used in evaluating the students’ attitudes toward the tablet PC usage. Interviews were conducted with eight teachers at pilot schools concerning the integration of tablet PCs into their classes; the positive and negative dimensions of tablet PCs were analyzed. The findings indicate that students have a positive attitude toward tablet PCs. There was not a meaningful difference between the attitudes of male and female students toward tablet PCs. The length of computer and Internet by the students did not affect their attitudes toward tablet PCs. The ways that teachers used tablet PCs in classes, the positive and negative aspects of tablet PC usage and the students’ expectations of tablet PCs were discussed in the study. 2013 Elsevier Ltd. All rights reserved.
Study comparing the stroke unit outcome and conventional ward treatment: a randomized study in Joinville, Brazil.

BACKGROUND AND PURPOSE
To assess the impact of a stroke unit (SU) on acute phase treatment when compared to a conventional general ward treatment (GW).


METHOD
Seventy-four patients with acute stroke were randomized between a SU and conventional general ward (GW). We compared both groups regarding the length of hospital stay, lethality and functional and clinical status within 6 months, using the Scandinavian scale and Barthel index.


RESULTS
Thirty-five and thirty-nine patients were allocated at SU and GW, respectively. Lethality on the 10th day at SU and GW achieved 8.5% and 12.8% respectively (p= 0.41), whereas 30-days mortality rates achieved 14.2% and 28.2% (p= 0.24), 17.4% and 28.7% on the 3rd month (p= 0.39), and 25.7% and 30.7% on the 6th month (p= 0.41). Thirty-day survival curve achieved 1.8 log rank (p= 0.17), with a trend for lower lethality in the SU. In order to save one death in 6 months in SU, NNT (the number need to treat) was 20; to get one more home independent patient NNT was 15. No significant difference was found between the length of hospital stay and morbidity.


CONCLUSION
No significant benefit was found in SU patients compared to GW group. However,an evident benefit in absolute numbers was observed in lethality, survival curve and NNT in thirty days period after stroke. Further collaborative studies or incresead number of patients are required to define the role of SU.
Liver anatomy: portal (and suprahepatic) or biliary segmentation.

BACKGROUND/AIMS
In liver anatomy and surgery, is portal and hepatic vein segmentation (French segmentation) to be preferred over arteriobiliary segmentation (Healey and Schroy, North American segmentation)?


METHODS
Several embryological arguments and an analysis of anatomical data from a personal collection of 110 vasculobiliary casts were made.


RESULTS
Embryological arguments: Portal vein branching appears first, arteriobiliary branching secondly follows the portal vein distribution. Segment II (the left lateral sector) is the development of the right lateral embryological lobe. The umbilical vein enters the left portion of the middle embryological lobe, forming segment IV on the right and segment III on the left: this is the left paramedian sector. So the left portal fissure (between left and middle lobes) transversally crosses the classical left lobe, which is not a portal unit. Segment VI is a late secondary prominence of segment VII, reaching the anterior margin of the liver only in man. Anatomical arguments: hepatic vein segmentation must be added to portal segmentation; the academic left lobe is the left hepatic vein sector, and the left hepatic fissure separates the classical right and left lobes. Portal vein segmentation must be preferred: portal vein duplication of branches of first order occurs only in 23.5% of the cases, while arteriobiliary duplication of first-order branches is noted in 50% of the livers, portal segmentation being much simpler.


CONCLUSIONS
Portal and hepatic vein segmentation seems to be much more accurate.
A general purpose tool for simulating the behavior of PV solar cells, modules and arrays

This paper describes the detailed implementation of a novel tool for simulating the behavior of photovoltaic devices under variable weather conditions, in which the effect of irradiance, temperature and wind speed are considered. The tool also takes into account the effect of the thermal capacitance of photovoltaic dispositives and it is suitable to work on both long-term and transient simulations. The proposed method is easily implementable in most simulation programs. In order to achieve this, a circuit-oriented model based on electrical and thermal equations is carried out. Finally, the proposed methodology is examined by comparing simulations in SABER, PSpice and SIMULIK with experimental data.
The influence of different contrast medium concentrations and injection protocols on quantitative and clinical assessment of FDG-PET/CT in lung cancer.

OBJECTIVES
To compare the effects of two different contrast medium concentrations for use in computed X-ray tomography (CT) employing two different injection protocols on positron emission tomography (PET) reconstruction in combined 2-(18)F-desoxyglucose (FDG) PET/CT in patients with a suspicion of lung cancer.


METHODS
120 patients with a suspicion of lung cancer were enrolled prospectively. PET images were reconstructed with the non-enhanced and venous phase contrast CT obtained after injection of iopromide 300 mg/ml or 370 mg/ml using either a fixed-dose or a body surface area adapted injection protocol. Maximum and mean standardized uptake values (SUV(max) and SUV(mean)) and contrast enhancement (HU) were determined in the subclavian vein, ascending aorta, abdominal aorta, inferior vena cava, portal vein, liver and kidney and in the suspicious lung lesion. PET data were evaluated visually for the presence of malignancy and image quality.


RESULTS
At none of the sites a significant difference in the extent of the contrast enhancement between the four different protocols was found. However, the variability of the contrast enhancement at several anatomical sites was significantly greater in the fixed dose groups than in the BSA groups for both contrast medium concentrations. At none of the sites a significant difference was found in the extent of the SUV(max) and SUV(mean) increase as a result of the use of the venous phase contrast enhanced CT for attenuation. Visual clinical evaluation of lesions showed no differences between contrast and non-contrast PET/CT (P=0.32).


CONCLUSIONS
Contrast enhanced CT for attenuation correction in combined PET/CT in lung cancer affects neither the clinical assessment nor image quality of the PET-images. A body surface adapted contrast medium protocol reduces the interpatient variability in contrast enhancement.
Impact of hand-carried cardiac ultrasound on diagnosis and management during cardiac consultation rounds.

AIM
To evaluate the impact of hand-carried cardiac ultrasound (HCU) on the diagnosis and management of patients during cardiac consultation rounds.


METHODS AND RESULTS
One hundred and fifty patients hospitalized in non-cardiac units were included after the consulting cardiologist felt that an echocardiographic examination was indicated as part of his work-up. They were randomly allocated to echocardiography with an HCU device (SonoHeart, SonoSite, Inc.) (75 patients) or with a full-featured standard echo (FE) system (75 patients). The consulting cardiologist noted whether a definitive diagnosis was made or further study was necessary. Diagnosis and change in management were noted. In the HCU patient group there were 103 clinical questions. Seventy-two percent of the referral questions required no comprehensive echocardiographic evaluation. For questions of left ventricular function, valve abnormalities and pericardial effusion this was 98%. In 48% there was an immediate change in clinical management. In the FE patient group there were 94 clinical questions. In 32% the FE examination led to change in clinical management.


CONCLUSION
HCU echocardiography provides clinically worthwhile assessment of left ventricular function, valve abnormalities and pericardial effusion in 98% of the cases. A direct assessment of cardiac function and anatomy at the bedside by an experienced cardiologist results in a significant immediate change in clinical management during consultation.
Programming the Story: Interactive Storytelling System

A multi-story can be generated by the interactions of users in the interactive storytelling system. In this paper, we suggest narrative structure and corresponding Storytelling Markup Language. Actor, Action, and Constraint are declared and programmed using interactive storytelling system which generates the stories. Generated stories can be transformed to multimedia formats which are texts, images, animations, and others.
Multi-resource aware partitioning algorithms for FPGAs with heterogeneous resources

As the chip densities increase, the modern FPGAs contain large capacity and increasingly provide heterogeneous units such as multipliers, processor/DSP cores, RAM-blocks etc, for efficient execution of crucial functions of the design. The hypergraph partitioning algorithms are generally used as a divide-and-conquer strategy, during synthesis and placement. The partitioning algorithms for designs with heterogeneous resources, need to not only minimize the cut, but also balance the individual types of resources. Unfortunately, the state-of-the-art multilevel hypergraph partitioning algorithms (hMetis,MLPart), are not capable of distinguishing the types of cells. To overcome this problem, we developed a new set of multilevel hypergraph partitioning algorithms, that are aware of multiple resources, and are guaranteed to balance the utilization of different resources. By evaluating these algorithms on large benchmarks, we found that it is possible to achieve such feasible partitions, while incurring only a slightly higher cut (3.3%-5.7%) compared to infeasible partitions generated by hMetis.
Perioperative stroke and associated mortality after noncardiac, nonneurologic surgery.

BACKGROUND
Stroke is a leading cause of morbidity and mortality in the United States and occurs in the perioperative period. The authors studied the incidence, predictors, and outcomes of perioperative stroke using the American College of Surgeons National Surgical Quality Improvement Program.


METHODS
Data on 523,059 noncardiac, nonneurologic patients in the American College of Surgeons National Surgical Quality Improvement Program database were analyzed for the current study. The incidence of perioperative stroke was identified. Logistic regression was applied to a derivation cohort of 350,031 patients to generate independent predictors of stroke and develop a risk model. The risk model was subsequently applied to a validation cohort of 173,028 patients. The role of perioperative stroke in 30-day mortality was also assessed.


RESULTS
The incidence of perioperative stroke in both the derivation and validation cohorts was 0.1%. Multivariate analysis revealed the following independent predictors of stroke in the derivation cohort: age ≥ 62 yr, history of myocardial infarction within 6 months before surgery, acute renal failure, history of stroke, dialysis, hypertension, history of transient ischemic attack, chronic obstructive pulmonary disease, current tobacco use, and body mass index 35-40 kg/m² (protective). These risk factors were confirmed in the validation cohort. Surgical procedure also influenced the incidence of stroke. Perioperative stroke was associated with an 8-fold increase in perioperative mortality within 30 days (95% CI, 4.6-12.6).


CONCLUSIONS
Noncardiac, nonneurologic surgery carries a risk of perioperative stroke, which is associated with higher mortality. The models developed in this study may be informative for clinicians and patients regarding risk and prevention of this complication.
Myofascial pain syndrome after head and neck cancer treatment: Prevalence, risk factors, and influence on quality of life.

BACKGROUND
Patients undergoing treatment for head and neck cancer may develop myofascial pain syndrome as sequelae. The purpose of this study was to determine the prevalence, risk factors, and quality of life (QOL) related to myofascial pain syndrome.


METHODS
This was a prospective study including patients with head and neck cancer with at least a 1-year disease-free interval.


RESULTS
One hundred sixty-seven patients were analyzed, and myofascial pain syndrome was diagnosed in 20 (11.9%). In the multivariate analysis, hypopharyngeal tumors (odds ratio [OR] = 6.35; 95% confidence interval [CI] = 1.58-25.56) and neck dissection (OR = 3.43; 95% CI = 1.16-10.17) were independent factors for myofascial pain syndrome. The pain (p < .001) and shoulder domain (p < .001) as well as overall University of Washington Quality of Life (UW-QOL) score (p = .006) were significantly lower in the patients with myofascial pain syndrome.


CONCLUSION
Myofascial pain syndrome was observed in 1 of 9 patients after head and neck cancer treatment and a worse QOL was observed among them. Tumor site and neck dissection were found to be risk factors for myofascial pain syndrome.
A shared decision-making communication training program for physicians treating fibromyalgia patients: effects of a randomized controlled trial.

OBJECTIVE
Fibromyalgia syndrome (FMS) is a condition of chronic widespread pain that is difficult to control and is associated with strains in physician-patient interaction. Shared decision making (SDM) can be a potential solution to improve interaction. We evaluated the effects of an SDM intervention, including an SDM communication training program for physicians, in a randomized controlled trial with FMS patients. The main objective was to assess whether SDM improves the quality of physician-patient interaction from patients' perspective.


METHODS
Patients were randomized to either an SDM group or an information-only group. The SDM group was treated by physicians trained in SDM communication and had access to a computer-based information package; the information-only group received only the information package and was treated by standard physicians. All patients were offered the same evidence-based treatment options for FMS. Patients were assessed with questionnaires on physician-patient interaction (main outcome criteria) and decisional processes. Physicians filled out a questionnaire on interaction difficulties. Assessment took place immediately after the initial consultation.


RESULTS
Data from 85 FMS patients (44 in the SDM group and 41 in the information-only group) were analyzed. The mean age was 49.9 years (S.D.=10.2), and 91.8% of patients were female. The quality of physician-patient interaction was significantly higher in the SDM group than in the information-only group (P<.001). We found no differences in secondary outcome measures.


CONCLUSIONS
SDM with FMS patients might be a possible means to achieve a positive quality of physician-patient interaction. A specific SDM communication training program teaches physicians to perform SDM and reduces frustration in patients.
Lymphocyte recovery after breast cancer treatment and mindfulness-based stress reduction (MBSR) therapy.

OBJECTIVES
This randomized controlled trial was conducted to examine immune recovery following breast cancer (BC) therapy and evaluate the effect of mindfulness-based stress reduction therapy (MBSR) on immune recovery with emphasis on lymphocyte subsets, T cell activation, and production of T-helper 1 (Th1; interferon [IFN]-γ) and T-helper 2 (Th2; interleukin-4 [IL-4]) cytokines.


METHOD
Participants who completed the study consisted of 82 patients diagnosed with Stage 0-III BC, who received lumpectomy and adjuvant radiation ± chemotherapy. Patients were randomized into an MBSR(BC) intervention program or a control (usual care) group. Immune cell measures were assessed at baseline and within 2 weeks after the 6-week intervention. The numbers and percentages of lymphocyte subsets, activated T cells, and Th1 and Th2 cells in peripheral blood samples were determined by immunostaining and flow cytometry.


RESULTS
Immune subset recovery after cancer treatment showed positive associations with time since treatment completion. The B and natural killer (NK) cells were more susceptible than T cells in being suppressed by cancer treatment. Women who received MBSR(BC) had T cells more readily activated by the mitogen phytohemagglutinin (PHA) and an increase in the Th1/Th2 ratio. Activation was also higher for the MBSR(BC) group if <12 weeks from the end of treatment and women in MBSR(BC) <12 weeks had higher T cell count for CD4(+).


CONCLUSION
MBSR(BC) promotes a more rapid recovery of functional T cells capable of being activated by a mitogen with the Th1 phenotype, whereas substantial recovery of B and NK cells after completion of cancer treatment appears to occur independent of stress-reducing interventions.
Hair testing of GHB: an everlasting issue in forensic toxicology.

BACKGROUND
In this paper, the authors present a critical review of different studies regarding hair testing of endogenous γ-hydroxybutyrate (GHB), concentrations in chronic users, and values measured after a single GHB exposure in drug facilitated sexual assault (DFSA) cases together with the role of a recently identified GHB metabolite, GHB-glucuronide.


CONTENT
The following databases (up to March 2017) PubMed, Scopus and Web of Science were used, searching the following key words: γ-hydroxybutyrate, GHB, GHB glucuronide, hair. The main key words "GHB" and "γ-hydroxybutyrate" were searched singularly and then associated individually to each of the other keywords.


SUMMARY
Of the 2304 sources found, only 20 were considered appropriate for the purpose of this paper. Summing up all the studies investigating endogenous GHB concentration in hair, a very broad concentration range from 0 to 12 ng/mg was found. In order to detect a single GHB dose in hair it is necessary to commonly wait 1 month for collecting hair and a segmental analysis of 3 or 5 mm fragments and the calculation of a ratio between the targeted segment and the others represent a reliable method to detect a single GHB intake considering that the ratios presently proposed vary from 3 and 10. The only two studies so far performed, investigating GHB-Glucuronide in hair, show that the latter does not seem to provide any diagnostic information regarding GHB exposure.


OUTLOOK
A practical operative protocol is proposed to be applied in all suspected cases of GHB-facilitated sexual assault (GHB-FSA).
A bio-molecular film ex-vivo model to evaluate the influence of canal dimensions and irrigation variables on the efficacy of irrigation.

AIMS
To devise an ex vivo model to test the efficacy of irrigation (static/dynamic) in removing a bio-molecular film from root canal walls.


METHODOLOGY
Forty human teeth with single straight canals were randomly allocated to two groups for static (n = 20) or dynamic (n = 20) irrigation. The root canals were prepared to different apical sizes (20, 40) and tapers (0.04, 0.08). The teeth were split longitudinally into two, stained collagen was applied to the canal surfaces and the tooth reassembled in a silicone matrix for dynamic or static irrigation. Digital images of the canal surface were taken before and after irrigation with 9, 18, 27 and 36 mL solution. The percentage of canal surface covered with stained collagen was quantified (ipWin4). The data were analysed using paired t-tests and linear regression models.


RESULTS
All the five explanatory variables: 'volume of irrigant used', 'mode of irrigation', 'orientation of open port of needle', 'corono-apical level of canal' and 'root canal dimension' had a significant (P < 0.001) influence on outcome of irrigation. The corono-apical level of canal was the most dominating factor. After irrigation, the apical third had 19.9% and 33.8% less area covered with the bio-molecular film than the middle and coronal thirds respectively.


CONCLUSIONS
The stained collagen bio-molecular film could not be removed completely by either static or dynamic irrigation. Factors influencing removal, in rank order of decreasing priority, were: corono-apical level, apical size and taper of canal preparation, and dynamic/static irrigation.
College students' academic motivation, media engagement and fear of missing out

The concerns about the consequences of mental problems related to use of social media among university students have recently raised consciousness about a relatively new phenomenon termed Fear of Missing Out (FoMO). Drawing on the self-determination theory and on the assumption that low levels of basic need satisfaction may relate to FoMO and social media engagement, the aim of the present research was to examine for the first time possible links between FoMO, social media engagement, and three motivational constructs: Intrinsic, extrinsic and amotivation for learning. Data were gathered from 296 undergraduate students by using the following scales: Social Media Engagement (SME), Fear of Missing Out (FoMOs) and Academic Motivation. The SME is a new scale, specifically designed for this study to measure the extent to which students used social media in the classroom. This scale includes three categories: Social engagement, news information engagement and commercial information engagement. Path analysis results indicated that the positive links between social media engagement and two motivational factors: Extrinsic and amotivation for learning are more likely to be mediated by FoMO. Interpretation of these results, their congruence within the context of the theoretical frameworks and practical implications are discussed. 2015 Elsevier Ltd. All rights reserved.
Inhibition of airway hyperreactivity by oxybutynin chloride in subjects with cervical spinal cord injury

Objective: To further investigate mechanisms of airway hyperreactivity among subjects with chronic cervical spinal cord injury (SCI), we assessed airway responsiveness to aerosolized methacholine and histamine in subjects receiving chronic oxybutynin chloride therapy, and compared the findings with those not receiving the agent. Methods: Twenty-five male subjects with cervical SCI participated in this study; 12 were maintained on oral oxybutynin chloride and 13 served as age-matched controls. Six of the 12 subjects receiving oxybutynin were challenged with aerosolized methacholine, and six with histamine; seven of the 13 control subjects were challenged with aerosolized methacholine and the remaining six with histamine. Results: All 13 control subjects and all six oxybutynin/histamine subjects exhibited a significant bronchoconstrictor response (PC20<8 mg/ml), whereas mean PC20 values for the oxybutynin/methacholine group were ⩾25 mg/ml. Conclusion: Our finding that the bronchoconstrictor effects of methacholine were blocked by oxybutynin chloride while those of histamine were not suggests that oxybutynin acts primarily through anticholinergic pathways rather than by causing generalized airway smooth muscle relaxation.