Miracle-dz/UniFAR-FTUs huggingface dataset:
Understanding charge transport in lead iodide perovskite thin-film field-effect transistors

Band-like charge transport is observed in lead halide perovskite field-effect transistors. Fundamental understanding of the charge transport physics of hybrid lead halide perovskite semiconductors is important for advancing their use in high-performance optoelectronics. We use field-effect transistors (FETs) to probe the charge transport mechanism in thin films of methylammonium lead iodide (MAPbI3). We show that through optimization of thin-film microstructure and source-drain contact modifications, it is possible to significantly minimize instability and hysteresis in FET characteristics and demonstrate an electron field-effect mobility (μFET) of 0.5 cm2/Vs at room temperature. Temperature-dependent transport studies revealed a negative coefficient of mobility with three different temperature regimes. On the basis of electrical and spectroscopic studies, we attribute the three different regimes to transport limited by ion migration due to point defects associated with grain boundaries, polarization disorder of the MA+ cations, and thermal vibrations of the lead halide inorganic cages.
IT project managers' construction of successful project management practice: a repertory grid investigation

Although effective project management is critical to the success of information technology (IT) projects, little empirical research has investigated skill requirements for IT project managers (PMs). This study addressed this gap by asking 19 practicing IT PMs to describe the skills that successful IT PMs exhibit. A semi‐structured interview method known as the repertory grid (RepGrid) technique was used to elicit these skills. Nine skill categories emerged: client management, communication, general management, leadership, personal integrity, planning and control, problem solving, systems development and team development. Our study complements existing research by providing a richer understanding of several skills that were narrowly defined (client management, planning and control, and problem solving) and by introducing two new skill categories that had not been previously discussed (personal integrity and team development). Analysis of the individual RepGrids revealed four distinct ways in which study participants combined skill categories to form archetypes of effective IT PMs. We describe these four IT PM archetypes – General Manager, Problem Solver, Client Representative and Balanced Manager – and discuss how this knowledge can be useful for practitioners, researchers and educators. The paper concludes with suggestions for future research.
A DSS FOR ASSESSING TECHNOLOGY ENVIRONMENTS

Assessing the external environment is an important component of organizations' survival and success. Unfortunately, a huge amount of information must be collected and processed in order to obtain a thorough and comprehensive representation of the environment. A decision support system can be very useful in helping decision makers to organize and analyze this information efficiently and effectively. This paper outlines a conceptual proposition helping to design such a system by presenting an ontology of the relevant information elements (actors, issues and needs) and a set of tools to analyze them. This paper also illustrates a prototype version of one of these tools which supports the analysis of the actors and issues perspectives.
Analysis of cervical ribs in a series of human fetuses

In humans, an increasing body of evidence has linked the frequency of cervical ribs to stillbirths, other malformations and early childhood cancers. However, the frequency of cervical ribs in a putatively healthy fetal population is not sufficiently known to assess the actual medical risks of these prenatal findings. We therefore analyzed the presence of skeletal anomalies in a series of 199 electively aborted fetuses, which were whole‐mount stained with alizarin red specific for skeletal tissues. Results show that approximately 40% of the fetuses had cervical ribs, even though external congenital abnormalities such as craniofacial and limb defects were absent. A literature overview indicates that the observed frequency of cervical ribs is comparable to results previously obtained for deceased fetuses with no or minor congenital anomalies, and higher than expected for healthy fetuses. This unexpected result can probably in part be explained by a higher detection rate of small cervical ribs when using alizarin red staining instead of radiographs. Additionally, studies in the literature suggest that the size of a cervical rib may indicate the severity of abnormalities, but this possibility requires further research. Anomalies of the axial skeleton are known to be caused by a disturbance of early development, which alters Hox gene expression, but in this study the origin of the stress could not be verified as maternal medical data were not available. The co‐occurrence of rudimentary or absent 12th ribs in 23.6% of the cases with cervical ribs indicates that in approximately 8% of the fetuses a homeotic shift occurred over a larger part of the vertebral column. This suggests that the expression of multiple Hox genes may have been affected in these fetuses. Together, the high incidence of cervical ribs and also their co‐occurrence with rudimentary or absent 12th ribs suggests that there may have been a disturbance of early development such that the studied fetuses are probably not informative about the general population. Future studies determining the frequency of cervical ribs in a more healthy fetal population are therefore needed to evaluate their potential as an indicator of medical risks.
Receptor‐mediated calcium signalling in glial cells from mouse corpus callosum slices

We addressed the question of whether glial cells in intact white matter tracts express neurotransmitter receptors and we used Ca++ signalling as a probe to detect the receptor activation. Corpus callosum slices from postnatal mice were bulk‐loaded with the Ca++‐ sensitive fluorescent dye fluo‐3, and confocal microscopy was used to measure Ca++ transients in response to neuroligands. Glial cell bodies were intensely dye‐loaded and could be discriminated from the diffuse fluorescence of axons. Subpopulations of glial cells from slices obtained at postnatal days 3 to 7 responded with Ca++ signals to ATP, glutamate, histamine, GABA, norepinephrine, serotonin, angiotensin II, bradykinin, and substance P. These subpopulations showed a distinct overlap; cells which were responsive to substance P always showed Ca++ signalling in response to histamine, ATP, GABA, and high K+ (membrane depolarization). GABA‐responsive cells almost always showed a [Ca++], increase after membrane depolarization. In brain slices from postnatal day 11 to 18 animals, the Ca++ responses were evident for glutamate, ATP, and norepinephrine, while GABA, substance P, serotonin, histamine, or angiotensin II rarely elicited a response. This study demonstrates that white matter glial cells in slices exhibit a large repertoire of neurotransmitter responses linked to Ca++ signalling and that these receptor systems are differentially distributed on sub‐populations of glial cells. © 1996 Wiley‐Liss, Inc.
PENGEMBANGAN GAME EDUKASI FINDING NEVISEBAGAI MEDIA PEMBELAJARAN TENSES DALAMBAHASA INGGRIS DI SMA

PENGEMBANGAN GAME EDUKASI FINDING NEVI SEBAGAI MEDIA PEMBELAJARAN TENSES DALAM BAHASA INGGRIS DI SMA Oleh: Hanif Kirana NIM. 09520241036 ABSTRAK Penelitian ini bertujuan untuk menghasilkan game edukatif tingkat SMA untuk mata pelajaran bahasa Inggris digunakan sebagai media pembelajaran irreguler verbs dan tenses berbasis Adobe Flash CS6. Pembelajaran dengan menggunakan game edukasi Finding Nevi diharapkan dapat meningkatkan motivasi belajar. Perancangan game edukasi Finding Nevi ini menggunakan metode Research and Development yang terdiri dari 10 tahap yaitu potensi dan masalah, pengumpulan bahan perancangan media, pengembangan produk, validasi ahli, revisi desain, uji coba produk awal, revisi produk, uji coba lapangan, revisi produk, dan produksi. Game edukasi Finding Nevi dikembangkan dengan menggunakan aplikasi Adobe Flash CS6. Kelayakan game edukasi dinilai oleh tim ahli media, ahli materi, dan siswa. Penelitian dilakukan di MAN 3 Yogyakarta dengan bantuan total 40 siswa dari kelas XII sebagai responden. Metode yang digunakan untuk pengumpulan data adalah dengan menggunakan angket skala likert. Pengujian game edukasi Finding Nevi dilakukan dengan menggunakan black-box testing. Hasil pengujian black box menyatakan bahwa semua fungsi yang disediakan telah berfungsi sesuai yang diharapkan. Hasil perhitungan presentase kelayakan untuk ahli media adalah sebesar 90% yang termasuk kategori sangat layak. Perhitungan presentase kelayakan ahli materi adalah sebesar 81,67% yang termasuk kategori sangat layak. Perhitungan presentase kelayakan uji coba awal adalah sebesar 80,89% yang termasuk kategori layak. Perhitungan uji coba lapangan mendapat presentase sebesar 77,56% yang termasuk kategori layak. Rata--rata nilai yang diperoleh 30 siswa pada soal pre-test adalah 79,27. Sedangkan rata-rata nilai pada soal post-test adalah 85,60. Hasil pengujian menunjukkan bahwa game edukasi Finding Nevi layak untuk digunakan. Kata kunci : Game edukasi, Research and Development, kelayakan, bahasa
Influence of Cow Bone Particle Size Distribution on the Mechanical Properties of Cow Bone-Reinforced Polyester Composites

This work was carried out to investigate the influence of cow bone particle size distribution on the mechanical properties of polyester matrix composites in order to consider the suitability of the materials as biomaterials. Cow bone was procured from an abattoir, washed with water, and sun-dried for 4 weeks after which it was crushed with a sledge hammer and was further pulverized with laboratory ball mill. Sieve size analysis was carried out on the pulverized bone where it was sieved into three different sizes of 75, 106, and 300 μm sieve sizes. Composite materials were developed by casting them into tensile and flexural tests moulds using predetermined proportions of 2, 4, 6, and 8%. The samples after curing were striped from the moulds and were allowed to be further cured at room temperature for 3 weeks before tensile and flexural tests were performed on them. Both tensile and flexural strength were highly enhanced by 8 wt% from 75 μm while toughness was highly enhanced by 6 and 8 wt% from 300 μm. This shows that fine particles lead to improved strength while coarse particles lead to improved toughness. The results show that these materials are structurally compatible and are being developed from animal fibre based particle; it is expected to also aid the compatibility with the surface conditions as biomaterials.
Using early view patterns to predict the popularity of youtube videos

Predicting Web content popularity is an important task for supporting the design and evaluation of a wide range of systems, from targeted advertising to effective search and recommendation services. We here present two simple models for predicting the future popularity of Web content based on historical information given by early popularity measures. Our approach is validated on datasets consisting of videos from the widely used YouTube video-sharing portal. Our experimental results show that, compared to a state-of-the-art baseline model, our proposed models lead to significant decreases in relative squared errors, reaching up to 20% reduction on average, and larger reductions (of up to 71%) for videos that experience a high peak in popularity in their early days followed by a sharp decrease in popularity.
MS Word Export To Multiple PDF Files Software - Please purchase license.Mathematics Anxiety Questionnaire: Development and Validation

The purpose of present research was to develop the questionnaire that could measure middle and high school students’ mathematics anxiety levels. Because mathematics anxiety is one of important components of mathematics classroom. In order to develop the questionnaire, a pretest form was developed through a literature survey and presented to experts for evaluation. After alterations based on their suggestions, a pilot study with 100 middle and high school students was held to revise the questionnaire. After the revision, a total of 69 items in the questionnaire was administered to 1015 students who were attending at middle and high school at Sivas city of Turkey. In order to realize the validity, exploratory factor analysis was performed. Exploratory factor analysis showed that the questionnaire included four factors and four-factor analysis of variance is 57.35%; for each factor, analysis of variance ranged 18.20 %, 16.32%, 12.41%, and 10.40% respectively. Cronbach Alpha Coefficient is also calculated for the entire questionnaire was as . 867; for each factor, alpha ranged . 832, . 771, . 754, and . 609 respectively, for reliability of the questionnaire. In this way, a questionnaire consisting of 17 items has been developed. So, the questionnaire had satisfactory results on validity and reliability tests.
Optimizing openflow load-balancing with L2 direct server return

Load-balancers have an essential role in enterprise data-centers, as their existence and performance is decisive for service provision and availability. The state of the art is that today's load-balancers are a piece of specialized embedded hardware with a proprietary operating system and application modules. In this paper we propose a concept to break up this black box model and to show how to develop a high performance LB with OpenFlow technology. In this approach we use OpenFlow network components to process the load-balancing and in order to reduce the maintenance effort and to lower the hardware cost factor. Furthermore, in case of fail-over it is redundant by concept and easier to replace by another device. The experimental evaluation of this concept proves that the concept is developed beyond a theoretical concept and the implemented solution is ready for deployment.
Stress and Suicide in the U.S. Army: Effects of Relocation on Service Members' Mental Health

The evidence from sociological and epidemiological studies indicates that people who migrate or move their residence tend to have higher rates of suicide than nonmovers. The periodic reassignment and relocation of soldiers places them, in theory, at higher risk for suicide. There are no prior reports of the relationship between Army moves and suicides. The findings of the current report are that the correlation of moves and suicide is not present for the majority of the soldiers but is present for the youngest third of the Army population. Some aspects of the individual and social dynamics that may influence the relation between relocation and suicide are provided, and some issues about the applicability of status-integration theory to relocation-related suicides are raised.
The Adaptive Markets Hypothesis: Evidence from the Foreign Exchange Market

Abstract We analyze the intertemporal stability of excess returns to technical trading rules in the foreign exchange market by conducting true, out-of-sample tests on previously studied rules. The excess returns of the 1970s and 1980s were genuine and not just the result of data mining. But these profit opportunities had disappeared by the early 1990s for filter and moving average rules. Returns to less-studied rules also have declined but have probably not completely disappeared. High volatility prevents precise estimation of mean returns. These regularities are consistent with the Adaptive Markets Hypothesis (Lo (2004)), but not with the Efficient Markets Hypothesis.
Child Behavior Problems, Teacher Executive Functions, and Teacher Stress in Head Start Classrooms

Research Findings: The current article explores the relationship between teachers’ perceptions of child behavior problems and preschool teacher job stress, as well as the possibility that teachers’ executive functions moderate this relationship. Data came from 69 preschool teachers in 31 early childhood classrooms in 4 Head Start centers and were collected using Web-based surveys and Web-based direct assessment tasks. Multilevel models revealed that higher levels of teachers’ perceptions of child behavior problems were associated with higher levels of teacher job stress and that higher teacher executive function skills were related to lower job stress. However, findings did not yield evidence for teacher executive functions as a statistical moderator. Practice or Policy: Many early childhood teachers do not receive sufficient training for handling children's challenging behaviors. Child behavior problems increase a teacher's workload and consequently may contribute to feelings of stress. However, teachers’ executive function abilities may enable them to use effective, cognitive-based behavior management and instructional strategies during interactions with students, which may reduce stress. Providing teachers with training on managing challenging behaviors and enhancing executive functions may reduce their stress and facilitate their use of effective classroom practices, which is important for children's school readiness skills and teachers’ health.
Tunable Broadband Nonlinear Optical Properties of Black Phosphorus Quantum Dots for Femtosecond Laser Pulses

Broadband nonlinear optical properties from 500 to 1550 nm of ultrasmall black phosphorus quantum dots (BPQDs) have been extensively investigated by using the open-aperture Z-scan technique. Our results show that BPQDs exhibit significant nonlinear absorption in the visible range, but saturable absorption in the near-infrared range under femtosecond excitation. The calculated nonlinear absorption coefficients were found to be (7.49 ± 0.23) × 10−3, (1.68 ± 0.078) × 10−3 and (0.81 ± 0.03) × 10−3 cm/GW for 500, 700 and 900 nm, respectively. Femtosecond pump-probe measurements performed on BPQDs revealed that two-photon absorption is responsible for the observed nonlinear absorption. The saturable absorption behaviors observed at 1050, 1350 and 1550 nm are due to ground-state bleaching induced by photo-excitation. Our results suggest that BPQDs have great potential in applications as broadband optical limiters in the visible range or saturable absorbers in the near-infrared range for ultrafast laser pulses. These ultrasmall BPQDs are potentially useful as broadband optical elements in ultrafast photonics devices.
Correlation between Renal Function Tests and Thyroid Hormones in Sudanese Patients with Hypo- and Hyperthyroidism

Background: Thyroid hormones affects functions of organ systems including the renal system, in which creatinine, blood urea nitrogen (BUN) and glomerular filtration rate (GFR) are affected. This study aimed to evaluate levels of creatinine, BUN and GFR in patients with hypo and hyperthyroidism and to correlate them with thyroid stimulating hormone (TSH), thyroxin (T4) and triiodothyronine (T3) levels. Methodology: A cross sectional descriptive study was conducted involving a total of 117 subjects in three groups: 37 hypothyroidism, 40 hyperthyroidism and 40 apparently healthy subjects as control. Plasma TSH, T4, T3, creatinine, blood urea nitrogen (BUN) and albumin were determined, glomerular filtration rate (GFR) was calculated according to MDRD equation. Results: Mean creatinine in hypothyroidism was 0.9±0.1 mg/dl, in hyperthyroidism was 0.7±0.2 mg/dl, while in control was 0.6±0.1 mg/dl, mean BUN in hypothyroidism was 11±2.9 mg/dl, and in hyperthyroidism was 14±2.5 mg/dl while in control was 10±3.2 mg/dl, mean estimated GFR in hypothyroidism was 100±17 ml/min, and in hyperthyroidism was 143±32 ml/min while in control was 163±23 ml/min. Correlation studies reveled that creatinine in hypothyroidism was significantly positive correlated with TSH and significantly negative correlated with T4 and T3, while in hyperthyroidism was significantly positive correlated with T4 and not correlated with TSH, BUN in hypothyroidism was significantly positive correlated with TSH but not correlated to T4 and T3 while in hyperthyroidism there is no correlation between BUN and thyroid hormones. GFR in hypothyroidism was significantly negative correlated with TSH and significantly positive correlated with T4 and T3 while in hyperthyroidism no correlation between GFR and thyroid hormones. Conclusion: Both overt hypo and hyperthyroidism significantly increase creatinine and BUN level while significantly decrease eGFR. Thyroid dysfunction significantly affects renal functions so normal functioning thyroid is needed for healthy kidney performance.
EFFECTIVENESS : OPTIMAL SELLING STRATEGIES FOR ONLINE AUCTION MARKET

The introduction of internet auction has significantly widened the pool of consumers who participate in auctions and increased the number of companies attempting to sell their products in an auction format. Previous empirical research on auctions has focused almost exclusively on the behavior of professional bidders. In this study, we collect data on a large number of internet auctions to explore the outcome of the auction in a real marketplace. In particular, we focus on the characteristic of sellers, auction parameters, the effect of supply and demand, and examine these impacts on auction effectiveness.
Use of Carboxymethylcellulose/Polyethylene Oxide Gel in Microdiscectomy With Interlaminectomy: A Case Series Comparison With Long-term Follow-up

Study Design. A consecutive, case series comparison. Objective. To compare safety, long-term pain, and disability scores with and without use of carboxymethylcellulose/polyethylene oxide (CMC/PEO) gel after microdiscectomy with interlaminectomy. Summary of Background Data. Patient outcomes after microdiscectomy for lumbar disc herniation are frequently complicated by adhesions and fibrotic scars. Present management is controlled by good surgical technique as adhesion-reduction agents to date, have either proved ineffective or toxic. In 2002 a 100% synthetic combination of CMC/PEO, which reduces adhesions and fibrosis, became available across Europe as a gel application, (OXIPLEX/SP adhesion barrier gel FzioMed, Inc., San Luis Obispo, CA) and distributed under the trade names OXIPLEX/SP adhesion barrier gel (DePuy International, Ltd., Leeds, United Kingdom) and MEDISHIELD adhesion barrier gel (Medtronic International Trading SARL, Tolochenaz, Switzerland). Methods. A consecutive series of 70 patients with lumbar disc herniation undergoing microdiscectomy with interlaminectomy by the same surgeon were treated at the end of surgery with either CMC/PEO gel (N = 35) or no gel (N = 35). Treatments were allocated by an independent investigator. At presurgery and regular intervals over 3 years postsurgery, Oswestry disability index (ODI) and leg and back pain scores determined by visual analog scales (VAS), were assessed by a member of the surgical team blinded to the initial treatment allocation. Results. Three years postsurgery reduction in disability as measured by the decrease in ODI compared with presurgery (mean ± SD) was significantly (P < 0.05) greater with CMC/PEO than controls (−49.4 ± 12.7 vs. −41 ± 17.8). CMC/PEO treatment also resulted in significantly more patients having no disability as measured by reaching 0% ODI scores (15 CMC/PEO [43%] vs. 0 control group [0%]) (P < 0.01). Leg and back pain as measured by the decrease in VAS scores 3 years postsurgery were reduced with CMC/PEO compared with controls(leg −6.8 ± 1.7 vs. −5.6 ± 1.6, back −0.4 ± 1.5 vs. −0.1 ± 2.0), P < 0.05 for leg pain. Importantly there were no safety issues and no differences in complications between the 2 treatment groups during the 30 day postoperative period. Conclusion. CMC/PEO gel after microdiscectomy with interlaminectomy appears safe to use and in a 3-year follow-up significantly reduces disability and leg pain scores compared with our conventional treatment.