Miracle-dz/UniFAR-FTUs huggingface dataset:
Exploring physics students’ engagement with online instructional videos in an introductory mechanics course

The advent of new educational technologies has stimulated interest in using online videos to deliver content in university courses. We examined student engagement with 78 online videos that we created and were incorporated into a one-semester flipped introductory mechanics course at the Georgia Institute of Technology. We found that students were more engaged with videos that supported laboratory activities than with videos that presented lecture content. In particular, the percentage of students accessing laboratory videos was consistently greater than 80% throughout the semester. On the other hand, the percentage of students accessing lecture videos dropped to less than 40% by the end of the term. Moreover, the fraction of students accessing the entirety of a video decreases when videos become longer in length, and this trend is more prominent for the lecture videos than the laboratory videos. The results suggest that students may access videos based on perceived value: students appear to consider the laboratory videos as essential for successfully completing the laboratories while they appear to consider the lecture videos as something more akin to supplemental material. In this study, we also found that there was little correlation between student engagement with the videos and their incoming background. There was also little correlation found between student engagement with the videos and their performance in the course. An examination of the in-video content suggests that students engaged more with concrete information that is explicitly required for assignment completion (e.g., actions required to complete laboratory work, or formulas or mathematical expressions needed to solve particular problems) and less with content that is considered more conceptual in nature. It was also found that students’ in-video accesses usually increased toward the embedded interaction points. However, students did not necessarily access the follow-up discussion of these interaction points. The results of the study suggest ways in which instructors may revise courses to better support student learning. For example, external intervention that helps students see the value of accessing videos may be required in order for this resource to be put to more effective use. In addition, students may benefit more from a clicker question that reiterates important concepts within the question itself, rather than a clicker question that leaves some important concepts to be addressed only in the discussion afterwards.
A study on correlation between consciousness level and performance of the worker

Consciousness is significantly related to workplace performance among managers and workers. A considerable amount of research indicates that consciousness is one of the best predictors of performance in the workplace. Conscious employees are generally more reliable, more motivated, and harder working. They have also lower rate of absenteeism and counterproductive work behaviours such as stealing and fighting with other employees. Furthermore, consciousness is the only personality trait that correlates with performance across all categories of jobs. This is a pilot study to determine the workers performance related with consciousness. The consciousness will be experimentally measured using the self developed sensor and virtual instrumentation. The worker performance will be determined by survey method. Data collected from 35 male workers in an organization indicated that consciousness was related to job performance. Finally the relationship will be established between workers performance and consciousness. Keywords— Consciousness, chakra energy, workplace performance, workplace safety
Models of maternity care: a continuity of midwifery care

Childbirth represents the most painful event in women’s lifetime. Worldwide around 140 million births occur each year. The majority of vaginal births among pregnant women with no risk factor for complications, either for themselves or their babies. But the complications occur during labour are the risk of death increases and morbidity for both mother and child. Maternal deaths also consideration part of pregnancy-related life-threatening conditions are recognised to complications that arise during labour, childbirth or the immediate postpartum period, often as result of obstructed labour, haemorrhage or sepsis. Around half of all stillbirths of neonatal deaths result from complications during labour and childbirth. The load of perinatal and maternal deaths is strangely higher in middleand low-income countries. So, improving the quality care approximately the birth time mostly in middleand low-income countries has been recognized as the utmost impactful strategy for reducing maternal and new-born deaths and still births, proportion with antenatal or postpartum care policies.
Biophysical characterization of a protein for structure comparison: methods for identifying insulin structural changes

Although protein structure has been studied for many decades it remains the case that we cannot state with confidence whether two samples have the same molecular structure, particularly in solution. The increasing number of biosimilar biopharmaceutical drugs that are being tested means this is not an academic exercise. In this work we consider how four well-established techniques: dynamic light scattering (DLS), circular dichroism (CD), nuclear magnetic resonance spectroscopy (NMR), and molecular modelling can be combined to provide information about the supposedly well-understood protein insulin. A goal of this work was to establish a systematic means of detecting differences between insulin samples as a function of pH, temperature, and the presence or absence of zinc, all of which are known to change the oligomerisation state and to affect molecular structure. We used the recently developed Secondary Structure Neural Network (SSNN) circular dichroism algorithm to facilitate analysis of the CD spectra.
Effect of previous hamstring strain on Anterior Cruciate Ligament (ACL) forces

Introduction: Anterior Cruciate Ligament (ACL) injuries are very common in the athletic population. While the hamstring muscles help protect the ACL, hamstring strain injuries (HSI) are also common in sports. After HSI, the muscle goes through many different adaptations that often alter the overall function of the hamstrings. Therefore, it is possible that the associated deficits to hamstring muscle function after HSI may alter ACL loading. Methods: Nine subjects were included in the study. Six in the healthy control group, and three in the previous HSI group. We used an ultrasound based subject-specific musculoskeletal model to estimate muscle forces and ACL forces during walking, squatting, and landing from a jump. Ultrasound data, along with static calibration from motion capture, were used to develop the subject specific model. The purpose of this study was to determine if people with a previous hamstring strain had increased ACL forces during common activities of daily living and sport compared to healthy controls. We hypothesize that people who have had a previous hamstring strain injury will have increased forces on the anterior cruciate ligament compared to individuals with no history of hamstring injury. Results: Our results did not support our hypothesis. People with a previous HSI did not have increased ACL forces compared to healthy controls. Discussion: Three subjects in the previous HSI group move differently compared to the control group. In three of the four dynamic tasks, the previous HSI subjects demonstrated significantly less sagittal plane hip range of motion compared to healthy controls. We also found significant differences in hamstring EMG during the drop jump task. We concluded that people may move differently after sustaining a HSI to compensate and ultimately decrease their risk of further injury.
Engineered biomaterials for cancer immunotherapy

Abstract Although cancer immunotherapy is showing tremendous promise and has progressed to the clinic, it has only achieved sporadic efficacy, with only a fraction of patients benefitting from the therapy and with undesirable side effects due to poor selectivity and high doses. Localized delivery of immunomodulators to activate anticancer immunity in situ avoids overactivation of the systemic immune system and reduces side effects. Engineered biomaterials—implantable, injectable, or transdermal—fabricated into drug delivery devices are critical components for the development of localized cancer immunotherapies. In this review, we briefly summarize progress in the application of engineered biomaterials to the localized delivery of cancer immunotherapy.
Microscale Polarization Color Pixels from Liquid Crystal Elastomers

Liquid crystal elastomers (LCEs) attract burgeoning research interests due to their programmable 3D shape transformation and achievable large strain (up to 400%), which allow their diverse applications. One exciting application is soft microrobots towards biomedical applications. Here, it is demonstrated that polarization colors, an intrinsic property from the anisotropic nature of LCEs, can assist LCEs in their diverse applications. Microscale color pixels with sizes as small as 15 µm × 15 µm are obtained with designable colors from precisely controlled thicknesses enabled by two‐photon polymerization technique. It is then demonstrated that in‐plane rotation of LCE pixels only changes their color brightness instead of color hue and small tilting angle (<15°) causes almost no change of their color. These properties enable high‐contrast tracking of LCEs under polarized microscope. Furthermore, it is exhibited that both 2D and 3D microstructures with pre‐designed multiple colors can be realized, allowing for LCE applications requiring precise discrimination of different components. Finally, dynamic polarization colors are explored by insertion of waveplates and change of temperature, which allows for either better tracking of LCEs or applications of LCEs in temperature sensing and information encryption. It is expected that polarization colors will assist various LCE applications, especially soft microrobot and art display applications.
On the geographical distribution of Navicula nielsfogedii J.C. Taylor & Cocquyt

Navicula nielsfogedii was recently described from tropical and sub-tropical Africa. New data on its distribution from several countries in Asia are provided in this paper, together with morphological observations and environmental information about the habitats where it was found. Since N. nielsfogedii was previously misidentified as Navicula heimansioides the morphology of both taxa is compared.
Kinesin Subunit Scale Conformational Change in the Centralspindlin Complex Induces

10.1074/jbc.M113. 463695 Access the most updated version of this article at doi: . JBC Affinity Sites Find articles, minireviews, Reflections and Classics on similar topics on the Alerts: When a correction for this article is posted • When this article is cited • to choose from all of JBC's e-mail alerts Click here http://www.jbc. org/content/288/27/19785.full. html#ref-list-1 This article cites 43 references, 15 of which can be accessed free at
Curating the use of digital media in higher education: a case study

ABSTRACT Digital technology constitutes a substantial presence in higher education and notions like ‘digital natives’ and ‘21st century digital skills’ dominate educational discourse. However, within the last decade, scholars have started questioning the prevailing techno-optimism and practitioners have started debating whether and how to regulate the use of digital devices. Based on a systematic qualitative analysis of 100 written evaluations and mapping sessions with five students, this study explores students’ experiences in an undergraduate course in which the teacher restricted the use of digital devices in discussion classes. We found that students expressed mostly positive attitudes towards resulting class engagement and mostly negative attitudes towards taking, sharing, and searching their notes. Finally, we discuss our findings based on the notion of media affordances.
Impact of the capture time on the series resistance of quantum-well diode lasers

Electrons and holes injected into a semiconductor heterostructure containing quantum wells are captured with a finite time. We show theoretically that this very fact can cause a considerable excess contribution to the series resistivity and this is one of the main limiting factors to higher efficiency for GaAs based high-power lasers. The theory combines a standard microscopic-based model for the capture-escape processes in the quantum well with a drift-diffusion description of current flow outside the quantum well. Simulations of five GaAs-based devices differing in their Al-content reveal the root-cause of the unexpected and until now unexplained increase of the series resistance with decreasing heat sink temperature measured recently. The finite capture time results in resistances in excess of the bulk layer resistances (decreasing with increasing temperature) from 1 mΩ up to 30 mΩ in good agreement with the experiment.
Higher Education and Productivity in China

This paper examines the impact of higher education on total factor productivity in China using province-level panel data over the period of 1995-2016. The results show that higher education has a significant U-shaped impact on total factor productivity with a threshold value of 0.323, indicating that higher education development would have a positive impact on total factor productivity after the ratio of college graduates to population exceeds 32.3%. Further analysis reveals that the impact of higher education on total factor productivity is mainly through the Technical Efficiency channel and the Scale Efficiency channel. Moreover, according to the results of the paper, higher education in most provinces of China’s is still below the threshold level, suggesting that developing higher education would be an important policy strategy to promote productivity in China.
Empirical Performance of Approximate Algorithms for Low Rank Approximation

Low rank approximation is arguably one of the most well-studied problems in numerical linear algebra, with diverse applications to clustering, data mining, distance matrix completion, information retrieval, learning mixtures of distributions, recommendation systems and web search. Formally, given a rank-r matrix A ∈ Rn×m, a parameter k, and a norm p, one seeks a rank-≤ k matrix A′ ∈ Rn×m that “well-approximates” A with respect to the norm p: i.e. minimizes ‖A−A‖p. When p = F (Frobenius norm) the problem can be solved using the truncated SVD algorithm, whereas when p = 1 (entrywise `1 norm) the problem is NP-hard and there exists no closed-form solution. In both cases, today’s massive datasets prohibit the computation of A′ in a reasonable amount of time. Recent advances in numerical linear algebra (sketching) have allowed the development of approximation algorithms that allow for a fast but approximate solution. This data analysis project studies the empirical performance of state-of-the-art in theory approximation algorithms for the `F and `1 variants of the low-rank approximation problem on a variety of synthetic and real datasets.
How to determine a minimum viable product in app-based lean start-ups: Kano-based approach

According to the ‘lean start-up’ concept, companies should develop their products or services with the minimum amount of effort and do the iterative release to shorten the life cycle. Therefore, defining a proper minimum viable product (MVP) is critical for companies who want to succeed in a lean start-up process. Despite the importance, however, how to determine an MVP has not been addressed in the previous literature. Therefore, this article suggests a systematic approach to determine an MVP using the Kano-based approach. In this approach, each function is evaluated from both customers’ and companies’ perspectives based on the revised Kano evaluation table. The results of customer-side Kano analysis and company-side Kano analysis are integrated to suggest the desirable MVP types: core to be MVP, feasible to be MVP, and next priority to MVP. A case study is also provided for better comprehension. The target start-up business is the service to measure and manage fine dust concentration. As a result, two functions are determined to be core to be MVP, and one function is derived as feasible to be an MVP, and eight functions are turned out to be next priority to MVPs, which are not urgent as company expected. This article contributes to the fields of the lean start-up in that it is one of the first attempts to provide a methodological support for determining MVPs in a systematic way.
H i absorption towards low-luminosity radio-loud active galactic nuclei of different accretion modes and WISE colours

H{\sc i} absorption studies of active galaxies enable us to probe their circumnuclear regions and the general interstellar medium, and study the supply of gas which may trigger the nuclear activity. In this paper, we investigate the detection rate of H{\sc i} absorption on the nature of radio galaxies based on their emission-line spectra, nature of the host galaxies based on the \textit{WISE} colours and their radio structure, which may help understand the different accretion modes. We find significant difference in distributions of W2$-$W3 colour for sources with H{\sc i} absorption detections and non-detections. We report a high detection rate of H{\sc i} absorption in the galaxies with \textit{WISE} infrared colours W2$-$W3 $>$ 2, which is typical of gas-rich systems, along with a compact radio structure. The H{\sc i} detection rate for low-excitation radio galaxies (LERGs) with W2$-$W3 $>$ 2 and compact radio structure is high (70.6$\pm$20.4 \%). In HERGs, compact radio structure in the nuclear or circumnuclear region could give rise to absorption by gas in the dusty torus in addition to gas in the interstellar medium. However, higher specific star formation rate (sSFR) for the LERGs with W2$-$W3 $>$ 2 suggests that H{\sc i} absorption may be largely due to star-forming gas in their hosts. LERGs with extended radio structure tend to have significantly lower values of W2$-$W3 compared to those with compact structure. Extended radio sources and those with W2$-$W3 $<$ 2 have low H{\sc i} detection rates.
Barriers to carrier transport in multiple quantum well nitride-based 
c
-plane green light emitting diodes

The presence of alloy disorder in III-nitride materials has been demonstrated to play a significant role in device performance through effects such as carrier localization and carrier transport. Relative to blue light emitting diodes (LEDs), these effects become more severe at green wavelengths. Because of the potential fluctuations that arise due to alloy disorder, full three-dimensional (3D) simulations are necessary to accurately relate materials properties to device performance. We demonstrate experimentally and through simulation that increased quantum well (QW) number in $c$-plane green LEDs contributes to excess driving voltage, and therefore reduced electrical efficiency. Experimentally, we grew an LED series with the number of QWs varying from one to seven and observed a systematic increase in voltage with the addition of each QW. Trends in LED electrical properties obtained from 3D simulations, which account for the effects of random alloy fluctuations, are in agreement with experimental data. Agreement is achieved without the need for adjusting polarization parameters from their known values. From these results, we propose that the polarization induced barriers at the GaN/InGaN (lower barrier/QW) interfaces and the sequential filling of QWs both contribute significantly to the excess forward voltage in multiple QW $c$-plane green LEDs.
Upholding God’s Essence: Ibn Taymiyya on the Createdness of the Spirit

Moustafa, Mohamed A. , “Upholding God’s Essence: Ibn Taymiyya on the Createdness of the Spirit”, Nazariyat Journal for the History of Islamic Philosophy and Sciences 3/2 (May 2017): 1-43. dx.doi. org/10.12658/Nazariyat.3. 1.M0035en Abstract: Although scholarly attention has been paid to Ibn al-Qayyim’s popular Kitāb al-rūḥ, the soulrelated views of his master are still ignored. Hence, this paper traces some of these ideas in Ibn Taymiyya’s Khalq al-rūḥ, in which he asserts the soul’s origination rather than its eternity, so as to uphold the idea of God’s essence. This paper consists of two parts. Part I problematizes Khalq in light of previous research, presents the sources of the study, and addresses some concepts that are significant for appreciating the development of its main argument. The five major arguments that Ibn Taymiyya invokes to justify his viewpoint shall be reconstructed from Khalq. Likewise, some of the ambiguities surrounding his identification of those who hold opposite views shall be resolved. Part II provides an annotated translation of Khalq.
Accounting for Teacher Labor Markets and Student Segregation in Analyses of Teacher Quality Gaps

Studies show that historically underserved students are disproportionately assigned to less qualified and effective teachers, leading to a “teacher quality gap. ” Past analyses decompose this gap to determine whether inequitable access is driven by teacher and student sorting across and within schools. These sorting mechanisms have divergent policy implications related to school finance, student desegregation, teacher recruitment, and classroom assignment. I argue that analyses of the teacher quality gap that consider how teachers and students are sorted across labor markets offer additional policy guidance. Using statewide data from Texas, I show that teacher quality gaps are driven by sorting across school districts within the same labor market, but this finding differs depending on how “teacher quality” is defined.
Determination of Selenium in Environmental Samples Using Hydride Generation Coupled to Atomic Absorption Spectroscopy

A hydride generation coupled to atomic absorption spectroscopy HGAAS method is presented for the determination of Selenium content in soil samples, alfalfa, animal feed, and water samples. The selenium distribution was studied in various locations in Zawia city. The studied areas were divided to seven different zones. The samples were digested in a mixture of mineral acid (HNO3, HCL, HCLO4 and H2O2). The Selenium element in acidified sample solution was reduced directly by treating it with Sodium borohydride (NaBH4), the metal hydride was introduced to the atomizer of AAS by inert carrier gas (N2, He). The instrument used for the generation of hydride was home built in the analytical lab and a batch method was implemented. The analytical parameters were optimized throughout the analytical procedure to give typical sensitivity (0.0055 pg/g). The Atomic Absorbance profile was recorded for all measured samples; the obtained signal profiles show smooth peaks. The Absorption value at the peak height was used as a basis for the analytical calculations. A calibration curve of standard selenium concentrations against absorbance was plotted and used to determine the selenium concentration in each sample. Soil samples were analysed by (HGAAS) for determination of concentration of selenium results are reported for all the studied zones, some zones did not exceeded the reported critical toxicity values (1.0-5.0 pg/g), but another zones are relativity high (5.6-5.9 pg/g). The Selenium content in alfalfa from different zones are relatively low in the range of (0.7 to2.20 pg/g). Concentrations of selenium in some animal feed samples are relatively low and showing deficiencies (0.62-0.71 pg/ g), but other samples are relatively high and were close to the lower limits for high dose (1.41-1.98 ng/g).