Miracle-dz/UniFAR-FTUs huggingface dataset:
Performance evaluation of the supercritical organic rankine cycle (SORC) integrated with large scale solar parabolic trough collector (SPTC) system: An exergy energy analysis

In this article, exergy and energy analysis of supercritical organic Rankine cycle integrated with solar parabolic trough collector (SPTC) is presented. Proposed working fluids are R600a, Toluene, R152a, isobutene, and cyclohexane for the supercritical ORC. Performance parameters including exergy efficiency, rate of exergy destruction, improvement potential, fuel depletion ratio, irreversibility ratio and expansion ratio were also examined in this study. The results of the study demonstrate that exergy efficiency increases continuously as both the solar irradiation intensity and inlet pressure of turbine increases, and R600a gives the maximum exergy efficiency among the others, i.e. around 96.09% at GB = 0.95 kW/m2 and 94.37% at 17 MPa. In addition, the exergy destruction rate decreases continuously with the increase in solar irradiation intensity as well as inlet pressure of the turbine, and it has been observed that the maximum exergy destruction rate occurs in the solar collector, which is around 80% of the total exergy destruction rate of combined SPTC‐SORC. Nonetheless, R600a has the minimum value of the exergy destruction rate, i.e., 1527 kW at GB = 0.5 kW/m2. Alternatively, cyclohexane shows a maximum exergy destruction rate, which is around 3794 kW at GB = 0.5 kW/m2. Also, SORC turbine and recuperator have a countable value of the exergy destruction rate. Finally, this study revealed that exergetic parameters like improvement potential, fuel depletion ratio and irreversibility ratio are found to be 11,859 kW, 0.579, and 0.9296 for the parabolic trough collector in the combined R600a based SPTC‐SORC system. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 891–899, 2018
Autologous Adipose-Derived Mesenchymal Stem Cells Embedded in Platelet-Rich Fibrin in Diabetic Foot Ulcers

Context and Aim: Mesenchymal stem cells (MSCs) and platelet-rich fibrin (PRF) have emerged as ideal candidates for advanced therapies of various therapeutically-challenging diseases; however, their regenerative potential in diabetic foot ulcers (DFU) has not been well determined. In this study, we reviewed our clinical experience in mitigating chronic ulcer complications of diabetic foot through a conventional treatment of autologous adipose-derived MSCs embedded in PRF with pure PRF injections. Materials and Methods: The present study was carried out in 10 patients with an open DFU wound selected over a period of 1 year starting from April 2019. Patients were either injected with PRF alone (Group A) or injected with MSCs derived from adipose tissue (ADMSC) embedded in (PRF (Group B). Results: Patients in Group B had a better healing index when compared to Group A. Conclusion: Use of ADMSC embedded in PRF showed promising results to treat DFU.
Luminous Science: Teachers Designing For and Developing Transdisciplinary Thinking and Learning

Abstract Creating learning environments that integrate arts, sciences, and computing in education can improve learning in these disciplines. In particular, transdisciplinary integrations of these disciplines can lead to expansive alterations or dissolutions of epistemological, ideological, and methodological boundaries. We wish to support teachers in the creation of transdisciplinary learning environments that draw on art, science, and computing. We developed a classroom project genre, Luminous Science, that was designed to bridge disciplinary materialities, epistemologies, and representations through students’ construction of computationally-rich representations of physical phenomena. We present a study of a multidisciplinary group of teachers co-designing a Luminous Science unit for their classrooms using sculptural lanterns with programmable media for both investigations and expressions of classroom gardens. We present a framework for examining what disciplinary understandings teachers drew on, how these ideas were utilized, and why they were brought together. We found teachers engaged in richly metarepresentational discussions wherein they applied values, epistemic criteria, and practices from all three constituent fields of study in their design work. We show how teachers developed units that simultaneously overlapped and diverged due to the pressures of navigating disciplinary and school structural challenges. Qualitative analysis of teacher discourse reveals how teachers liberated disciplinary boundaries, actively and critically explored synergies and tensions in disciplinary integration, and traversed goals that focused on both disciplinary improvement and holistic learning. Our study sheds light on how we can both study teachers who are designing for disciplinary integration and support them through professional development opportunities to encourage more transdisciplinary interactions that can expand what it means to do or teach art, science, and computing.
Southern Ocean Ecosystem Response to Last Glacial Maximum Boundary Conditions

Phytoplankton exert a significant control on the marine carbon cycle and can thus impact atmospheric CO2 concentration. Here we use a new ecosystem model to analyze the response of diatoms and coccolithophores in the Southern Ocean to Last Glacial Maximum (LGM) climate conditions, and changes in aeolian iron (Fe) input in the Southern Ocean. We find that LGM climate conditions without changes in Fe input lead to a large increase in diatoms north of the winter sea ice edge in the South Atlantic (19%) and the South Pacific (26%), and a 31% and 9% increase within the seasonal sea‐ice zone in the South Atlantic and Indian oceans, respectively, while diatoms decrease in the Ross and Weddell Seas, and in the South Pacific (62%) south of the winter sea ice edge. Coccolithophores increase by 11% in the South West Atlantic near 45°S but are outcompeted by diatoms within the seasonal sea‐ice zone, where they decrease by 21%. Overall, this results in a 11% decrease in Southern Ocean net primary productivity (NPP) and a 2.4% decrease in export production (EP). A series of sensitivity experiments with different aeolian Fe input are compared to available paleo‐proxy records. The best fit is obtained for a simulation forced with dust fluxes from Lambert et al. (2015), https://doi.org/10.1002/2015gl064250 and reduced Antarctic Bottom Water formation in the Weddell Sea. The 78% increase in aeolian Fe input in the Southern Ocean in this simulation increases the Southern Ocean EP by 4.4%, while NPP remains 8.7% weaker compared to preindustrial.
DBFT: A Byzantine Fault Tolerance Protocol With Graceful Performance Degradation

Byzantine Fault Tolerant (BFT) state machine replication protocols are used to achieve agreement among replicated servers with arbitrary faults. Most existing BFT protocols perform well in fault-free cases, but usually suffer from serious performance degradation when faults occur. In this paper, we present DBFT, a BFT protocol that realizes graceful performance degradation in faulty cases. The major novelty of DBFT lies in the double-response mechanism, which lets replica nodes deterministically respond to clients twice: one is after the speculative execution phase and the other is after the commitment phase. The double-response mechanism ensures good performance in spite of inconsistency in speculative execution. Also, to further alleviates undetectable performance attacks by a smartly malicious primary, we change primary upon every outstanding request. Moreover, DBFT does not involve clients in critical consensus operations so as to reduce the load of clients. We prove the correctness properties, i.e., safety and liveness, of DBFT. We conduct extensive experiments and the results show that, DBFT outperforms similar BFT protocols obviously in normal cases.
Early Development of Neural Speech Encoding Depends on Age but Not Native Language Status: Evidence From Lexical Tone

Abstract We investigated the development of early-latency and long-latency brain responses to native and non-native speech to shed light on the neurophysiological underpinnings of perceptual narrowing and early language development. Specifically, we postulated a two-level process to explain the decrease in sensitivity to non-native phonemes toward the end of infancy. Neurons at the earlier stages of the ascending auditory pathway mature rapidly during infancy facilitating the encoding of both native and non-native sounds. This growth enables neurons at the later stages of the auditory pathway to assign phonological status to speech according to the infant’s native language environment. To test this hypothesis, we collected early-latency and long-latency neural responses to native and non-native lexical tones from 85 Cantonese-learning children aged between 23 days and 24 months, 16 days. As expected, a broad range of presumably subcortical early-latency neural encoding measures grew rapidly and substantially during the first two years for both native and non-native tones. By contrast, long-latency cortical electrophysiological changes occurred on a much slower scale and showed sensitivity to nativeness at around six months. Our study provided a comprehensive understanding of early language development by revealing the complementary roles of earlier and later stages of speech processing in the developing brain.
RESILIENCE, PERCEIVED SOCIAL SUPPORT, AND LIFE SATISFACTION AMONG MALAYSIAN COLLEGE STUDENTS

Background and Purpose: Resilience is an essential element of life satisfaction. Individuals with high resilience are normally able to cope with a problem and find its solutions. Resilience is critical in helping students to achieve life satisfaction and good mental health. In addition, social support has been found as one of the good predictors in achieving life satisfaction. However, the underlying mechanism by which resilience is associated with life satisfaction has been under examined. The current study investigates the association between resilience and life satisfaction among Malaysian college students, focusing on social support as a factor mediating this association. Methodology: A total of 491 students participated in this study. The data were collected using a set of questionnaires. The mediation model was tested using structural equational modelling. Findings: Results showed that the total effects of resilience on life satisfaction were significant. Furthermore, social support mediated the influence of resilience on life satisfaction. Therefore, improving resilience and enhancing social support may increase Malaysian college students’ satisfaction in life. Contributions: The present study has implications on enhancing life satisfaction among college students. Finally, the study highlights the importance of social support in the implementation of intervention programmes with the goal of enhancing life satisfaction. Keywords: Social support, Malaysian, college students, life satisfaction, resilience. Cite as: Md Khalid, N. (2021). Resilience, perceived social support, and life satisfaction among Malaysian college students. Journal of Nusantara Studies, 6(2), 21-40. http://dx.doi. org/10.24200/jonus.vol6iss2pp21-40
Secondary Organic Aerosols in PM2.5 in Bengbu, a Typical City in Central China: Concentration, Seasonal Variation and Sources

To investigate the concentration, seasonal variation, and sources of secondary organic aerosols (SOAs) in the inland areas of central China, 244 seasonal PM2.5 samples were collected from January to October 2019 at one urban site and one suburban site simultaneously in Bengbu of Anhui Province. Concentrations of organic carbon (OC), elemental carbon (EC), water-soluble organic carbon (WSOC), and typical organic tracers, including saccharides, tracers of SOAs from isoprene, terpenes, and toluene, were measured. Results showed that Bengbu has high pollution levels of organic aerosols, with annual average OC concentrations of about 9.5 μg m−3. About 60% of the OC in PM2.5 in Bengbu was water soluble. Different seasonal trends were found for the SOA tracers of isoprene, monoterpene, seisquiterpene, and toluene. The highest seasonal average concentration of the isoprene SOA tracers was observed in summer and of the monoterpene and seisquiterpene SOA tracers in autumn. A stronger correlation was found between the 2-methylglyceric acid-to-2-methyltetrol ratio (MGA/MTL) and ambient temperature than that between MGA/MTLs and NOX concentration, suggesting that temperature has an important impact on the MGA/MTL ratio besides NOX concentration. The OC/EC-based method, WSOC-based method, tracer yield method, and positive matrix factorization (PMF)-based method were used to estimate the concentration and sources of secondary organic carbon (SOC), and the PMF-based method was believed to be able to give reasonable results. SOC was the main contributor of WSOC in PM2.5 in Bengbu, while biomass burning made an important contribution to WSOC in autumn and winter (~40%). SOC was mainly associated with SOA tracers in summer and mainly associated with secondary ions in spring and winter, suggesting different formation mechanisms in different seasons.
Bridging Cultural Identities: Examining Newcomer’s Post-Secondary School Integration Experiences Through an Arts-Based Ethnographic Approach

Many modern emerging adults undertake the task of identity development while navigating life on a post-secondary campus, where they assimilate to new social and learning environments. Emerging adult newcomers (i.e. immigrants) must navigate additional developmental challenges as they reconcile their cultural, ethnic, and personal identity development simultaneously while facing systemic barriers to post-secondary integration. We employed an arts-based engagement ethnography to investigate the post-secondary integration experiences of 10 emerging adults from a person-first perspective. Through cultural probes, individual semi-structured interviews, and focus groups, we identified four key structures to participants’ integration experience: fitting in (through assimilation and accommodation), biculturalism, managing familial expectations, and being a newcomer in the classroom. This research clarifies the key experiences shaping young newcomer identity development and highlights the profound ways in which young newcomers negotiate and reconcile their intersecting identities while integrating into new education contexts following migration.
Classification of High Density Regions in Global Ionospheric Maps With Neural Networks

The database of Global Ionospheric Maps (GIMs) produced at Jet Propulsion Laboratory is analyzed. We define high density total electron content (TEC) regions (HDRs) in a map, following certain selection criteria. For the first time, we trained four convolutional neural networks (CNNs) corresponding to four phases of a solar cycle to classify the GIMs by the number of HDRs in each map with ∼ 80% accuracy on average. We compared HDR counts for GIMs across ten years to draw conclusions on how the number of HDRs in the GIMs changes throughout the solar cycle. Occurrence of HDRs during different geomagnetic activity conditions is discussed. Catalog of selected HDRs for ten years and four CNN‐based models that can be used to extend classification to other years are provided for the community to use.
A 4 year ERCP Profile of Tertiary Care Hospital: Indications and Diagnosis

Aims: To find the indications and diagnosed conditions in the cases reported in Fatima Memorial Hospital Lahore. Also, the prevalence of this procedure amongst the genders in our setting. To establish statistical association between indications and diagnosis. Methodology: All the ERCP procedures done in 4 years from January, 2011 to January 2014 were compiled. The data was gathered using a simple form after the intervention. A total of 554 patients’ data was available, all participants were above the age of 18 years. A response rate 93% was recorded for who consented and allowed to share their information anonymously in the study. Chi square was used to find statistical association, with p-value <0.005 was taken as significant. IBM SPSS 22 was used for data input and evaluation. Results: In our study 35% of the participants were males and 65% were females. 58.33% of the patients underwent sphincterotomy. The highest number of patient’s indicated of undergoing ERCP was 58.33% because of obstructive jaundice without any cause on further investigations. Choledocholithiasis was the commonest diagnosis with 36.6%. A strong association between the indications and the final diagnosis was also found with p-value of 0.000. The success rate of the intervention was 79% making it a safer procedure to be applied. Conclusion: More females have undergone this procedure. Obstructive jaundice was declared as major indication with choledocholithiasis as the commonest condition diagnosed. It was a successful procedure in our setting. Keywords: ERCP, Gastroenterology, Intervention
Estimating the Optimum Level of Debt-Threshold: Empirical Evidence from Pakistan

This study aims to determine the debt threshold of foreign debt and investigate the effectiveness of debt overhang effect beyond this threshold. ARDL model is framed within the structure of Solow growth model for estimating the coefficients of this model. Quadratic bivariate model is applied to determine the optimum level of debt-threshold. Different sort of diagnostic tests are also conducted in this study. Sample period is ranging from 1976-2020. This study finds that debt overhang is effective above the optimal level of foreign debt which is 26.4% of gross domestic product. Findings also depict that Pakistan is experiencing the debt-overhang effect since 1976 as the ratio of external debt-to-GDP has remained over and above the optimal level of debt across the sample. Since no government can avoid external borrowing completely, therefore this study recommends that government borrowing should be restricted to the optimum level of foreign debt. Similarly, efforts should also be made for downsizing the debt burden by utilizing the non-debt sources of finances like grants and revenues and that effective debt-management policies should be formulated for enhancing the economic productivity.
Recent Developments of Crystallographic Analysis Methods in the Scanning Electron Microscope for Applications in Metallurgy

Abstract The field of metallurgy has greatly benefited from the development of electron microscopy over the last two decades. Scanning electron microscopy (SEM) has become a powerful tool for the investigation of nano- and microstructures. This article reviews the complete set of tools for crystallographic analysis in the SEM, i.e., electron backscatter diffraction (EBSD), transmission Kikuchi diffraction (TKD), and electron channeling contrast imaging (ECCI). We describe recent relevant developments in electron microscopy, and discuss the state-of-the-art of the techniques and their use for analyses in metallurgy. EBSD orientation measurements provide better angular resolution than spot diffraction in TEM but slightly lower than Kikuchi diffraction in TEM, however, its statistical significance is superior to TEM techniques. Although spatial resolution is slightly lower than in TEM/STEM techniques, EBSD is often a preferred tool for quantitative phase characterization in bulk metals. Moreover, EBSD enables the measurement of lattice strain/rotation at the sub-micron scale, and dislocation density. TKD enables the transmitted electron diffraction analysis of thin-foil specimens. The small interaction volume between the sample and the electron beam enhances considerably the spatial resolution as compared to EBSD, allowing the characterization of ultra-fine-grained metals in the SEM. ECCI is a useful technique to image near-surface lattice defects without the necessity to expose two free surfaces as in TEM. Its relevant contributions to metallography include deformation characterization of metals, including defect visualization, and dislocation density measurements. EBSD and ECCI are mature techniques, still undergoing a continuous expansion in research and industry. Upcoming technical developments in electron sources and optics, as well as detector instrumentation and software, will likely push the border of performance in terms of spatial resolution and acquisition speed. The potential of TKD, combined with EDS, to provide crystallographic, chemical, and morphologic characterizations of nano-structured metals will surely be a valuable asset in metallurgy.
THE DEVELOPMENT OF TAMAN PENJUMLAHAN LEARNING MEDIA ASSESTED ARTICULATE STORYLINE 3 ON ADDITIONAL CONCEPT IN FIRST GRADE OF ELEMENTARY SCHOOL

This study aims to develop and test the effectiveness of the additional media with the aid of articulate storyline 3 on the concept of summation in the first grade of SDN II Linggasirna. The method used is the method of developing R&D (Research and Development) Sugiyono. The product trial in this study includes three stages, namely one-on-one trials conducted on 3 students, small group trials conducted on 7 students, and large group trials conducted on 20 students. The data analysis technique used in this research is qualitative and quantitative data analysis. Data collection techniques using a questionnaire and pretest-posttest. The results of the study show that the development of the addition garden media with the help of articulate storyline 3 on the concept of addition is already valid. The results of the pretest and posttest were calculated using the paired sample T-Test analysis technique, the results obtained were count > table or 12,665 > 2,093, which means Ho is rejected and Ha is accepted, meaning that there is a significant difference between before and after being given treatment using the media garden summation assisted by articulate storyline 3 on the concept of summation in the first grade of SDN II Linggasirna. Based on the average results, the posttest value of 87.30 is greater than the pretest of 66.05. Then the addition garden learning media assisted by articulate storyline 3 can be said to be feasible and effective to use in the concept of addition.