Miracle-dz/UniFAR-FTUs huggingface dataset:
Effect of the Injection Pressure on Enhancing Oil Recovery in Shale Cores during the CO2 Huff-n-Puff Process When It Is above and below the Minimum Miscibility Pressure

In CO2 injection, there is a minimum miscibility pressure (MMP) above that CO2 can be miscible with oil, so that oil recovery will be high. This paper is to investigate the effect of the injection pressure on enhanced oil recovery in shale oil cores under huff-n-puff CO2 injection, when the pressure is above and below the MMP. We first estimated the MMP for a Wolfcamp oil using slimtube tests. The slimtube test results showed that the estimated MMP for the CO2–Wolfcamp crude oil system was about 1620 psi at 104 °F. After that, we conducted 15 CO2 huff-n-puff experiments using three different Wolfcamp shale cores at pressures below and above the MMP. These pressures were 1200, 1600, 1800, 2000, and 2400 psi. Each huff-n-puff test has 7 cycles. The huff-n-puff experiments for three cores showed that, below the MMP, the injection pressure had a significant effect on enhancing oil recovery. Higher than the MMP, the increased pressure further increased the oil recovery until the injection pressure was about 20.
Mechanical Design and Simulation of a Water Pipes Cleaning Robot

Pipelines have a widely spread applications in industry. Water, sewage, flammable liquid, high pressure gasses and oil are transported using pipelines. These pipelines are long, interconnected and may be constructed underground or underwater. This makes their monitoring, periodic maintenance and repair a hard job when done by human operators. Hence, a robot system capable of carrying out these complicated operations in pipelines is extremely requested.in this papers a mechanical design and a prototype of an in-pipe robot system for cleaning 0.5 m inner diameter water pipes is presented. The proposed robot system is designed to perform cleaning operations for straight horizontal water pipes based on abrasion concept. The in-pipe robot system have three modules; forward and backward motion module, two identical cleaning modules which can move in rotational motion and radial motion (in and out) module. These three modules are designed to have the robot's two main positions: open position (for cleaning) and closed position (while entering and getting out of the pipe). A 3D model has been built using Solid works software, then a finite element analysis was carried out on robot’s frame using two materials: Steel and Aluminium. However, the Steel material has been selected due to its high rigidity. The robot control system was done using Adriano software. Robot dynamics were simulated in Simulink environment. The real time robot testing and measurements showed that the proposed robot mechanism can complete the cleaning operations effectively. The developed robot is expected to minimize maintenance time, effort, and cost.
VMATE – Intelligent E-Learning Management System for Educational Institutions

The world is facing a huge health crisis which is demanding to reorganize the way it functions from square one. The spread of the pandemic, the shutdown of education institutions, and the shift to online learning were so fast that it barely gave any time to consider the difficulties faced by students. This is a great opportunity where educational institutions will shift to blended learning; hence it will become a new way of learning where there will be a need to find new ways to deliver the best content by using learning management systems. Therefore, the virtual learning world will create a great impact on the current education system due to the diverse effect of the epidemic. Hence different organizations are tremendously advancing their technology, and it will become more crucial over time. VMATE –Intelligent E-Learning Management System provides an interface for learners, which is of great significance and practical value for the improvement of learning and teaching quality. The use of Computers and the Internet has introduced technological conditions for teachers and students who can make good use of online information provided and communicating with others. This can be used by institutions and for different environments, where they can have computer-based instructions, blended-learning, and increased quality and quantity learning. Besides some basic management functions, the system focuses on assignment grading, assessment for various learning courses which makes it suitable to provide personalized grading and detailed feedback.
Synthesis of Trelagliptin Succinate

An improved process for the synthesis of antidiabetic drug trelagliptin succinate through unprotected (R)-3-aminopiperidine was described. The impurity profile with different conditions of the key substitution was illustrated, and then the best reaction condition was identified. The optimizations also included the bromination of 4-fluoro-2-methylbenzonitrile so that the process became efficient and concise.
Research on drop tower technology for simulating explosive impact load

When military vehicles are subjected to a mine blast, the vehicles will be damaged and the occupants will be injured. The main objective of this paper is to study the feasibility and accuracy of the drop tower to simulate the response of the vehicle body under the actual explosion condition. The equivalent damage method of impact waveform simulation was studied, and the feasibility of the equivalent damage principle of impact waveform based on change in velocity was verified. By analyzing a large number of data of simplified seat impact simulation, the mechanical model of the drop tower was analyzed. Through the correlation study of the parameters of the drop impact load, the relation formula of the drop height required by the target load was constructed, and the customization of the impact load was realized. The response simulation of the protective seat in the explosion was completed in the drop tower, which verifies the accuracy of the drop tower in simulating the explosion impact load. In addition, the results provide a good basis for the follow-up research.
Omnidirectional Dual-Polarized Antenna Using Colocated Slots With Wedgy Profile

In this article, an omnidirectional dual-polarized antenna with low windage is presented within a wedge-profiled structure for supersonic onboard systems. Based on aerodynamic analysis, a wedge-profiled cavity is designed with colocated slots for omnidirectional and dual-polarized radiation. For horizontal polarization, two identical half-wavelength slots are etched onto the cavity sidewalls symmetrically. The vertical polarization is achieved by another horizontal slot, with the port isolation higher than 42 dB. A low windage coefficient of 0.11 is obtained within the wedge-profiled cavity with the dimensions of <inline-formula> <tex-math notation="LaTeX">$41.6 \times 16 \times 30$ </tex-math></inline-formula> mm<sup>3</sup> (<inline-formula> <tex-math notation="LaTeX">$0.34\lambda _{0} \times 0.13\lambda _{0} \times 0.24\lambda _{0}$ </tex-math></inline-formula>). The proposed antenna is constructed and tested, with the measured results in agreement with the simulated ones. The operating bandwidths cover the band of 2.40–2.48 GHz, and the gain variations below 3.5 dB are realized in the azimuthal plane for both polarizations. The proposed wedgy antenna is with both electromagnetic and aerodynamic considerations, exhibiting the potentials in supersonic onboard communication systems.
Investigating anxiety, depression and obsessive-compulsive disorders among the pregnant women during Covid-19 pandemic

Amac: Calismamizin amaci Kovid-19 Pandemi surecinde gebe kadinlar arasinda anksiyete, depresyon ve Obsesif Kompulsif bozukluklarini (OKB) arastirmaktir. Gerec ve Yontem: Bu kesitsel calismaya, Haziran-Temmuz 2020 tarihleri arasinda rutin gebelik muayenesi icin Kadin Hastaliklari ve Dogum Klinigi’ne basvuran 71 gebe alinmistir. Katilimcilarin depresyon, anksiyete ve OKB seviyelerinin belirlenmesi icin; Beck Anksiyete Envanteri (BAE), Beck Depresyon Envanteri (BDE) ve Maudsley Obsesif Kompulsif Envanter (MOCI) olcekleri kullanilmistir. Bulgular: Arastirmaya katilanlarin yas ortalamasi 30, ortalama Vuvut Kitle Indeksi (VKI)'si 24.4’dir. Gebelerin %16.9'unun BDE testi normal saptanirken , %46.5'inin hafif, %22.5'inin orta ve %14.1’inin siddetli depresyonu oldugu saptanmistir. Gebelerin %31'inde hafif, %45.1'inde orta, %23.9’unde ise siddetli seviyede anksiyete tespit edilmistir. Gebelerin %25.4'unde OKB saptanma olasiliginin dusuk , %31’inde OKB oldugu ve katilimcilarin %43.7'nun OKB saptanma olasiliginin yuksek oldugunu gorulmustur. BDE ile BAE skoru (r=0.405, 0.000) ve MOCI skoru (r=0.319,sig= 0.007) arasinda pozitif anlamli bir iliski bulunmustur. OKB Olcegi ile VKI arasinda ise negatif anlamli bir iliski tespit edilmistir. (r=-0.268, sig=0.024). Calisan hamileler ile calismayan hamileler arasinda depresyon bakimindan anlamli bir fark saptanmamistir. Sonuc: Gebe kadinlar icin ruh sagligi oldukca onem tasidigindan, Kovid-19 pandemi kosullarinda calisan hamile kadinlarin ruh sagligina ozellikle dikkat edilmesi gerekmektedir. Bunun nedeni, bu kisilerin bunyelerinin Kovid-19 gibi bulasici hastaliklar karsisinda daha savunmasiz olmasidir.
Thin silicon solid-state detectors for energetic particle measurements

Context. Silicon solid-state detectors are commonly used for measuring the specific ionization, dE∕dx, in instruments designed for identifying energetic nuclei using the dE∕dx versus total energy technique in space and in the laboratory. The energy threshold and species resolution of the technique strongly depend on the thickness and thickness uniformity of these detectors. Aims. Research has been carried out to develop processes for fabricating detectors that are thinner than 15 μm, that have a thickness uniformity better than 0.2 μm over cm2 areas, and that are rugged enough to survive the acoustic and vibration environments of a spacecraft launch. Methods. Silicon-on-insulator wafers that have a device layer of the desired detector thickness supported by a thick handle layer were used as starting material. Standard processing techniques were used to fabricate detectors on the device layer, and the underlying handle-layer material was etched away leaving a thin, uniform detector surrounded by a thick, supporting frame. Results. Detectors as thin as 12 μm were fabricated in two laboratories and successfully subjected to environmental and performance tests. Two detector designs were used in the High-energy Energetic Particles Instrument, which is part of the Integrated Science Investigation of the Sun instrument suite on NASA’s Parker Solar Probe spacecraft. These detectors have been performing well for more than two years in space. Conclusions. Thin silicon detectors in d E∕dx versus total energy instruments enable the identification of nuclei with energies down to ~1 MeV nuc−1. This research suggests that detectors at least a factor of two thinner should be achievable using this fabrication technique.
Spectral analysis of switch voltage for dual randomized PWM DC-DC converters operating in DCM

ABSTRACT This paper addresses the spectral characteristics of a dual randomised pulse width modulation scheme (RCFM-RPPM) for reducing conducted EMI in the basic DC-DC converters (buck, boost, and buck-boost) operating in discontinuous conduction mode (DCM). It combines two simple schemes, random carrier frequency modulation (RCFM), and a random pulse position (RPPM). First, the modulating principle of the dual randomised PWM is presented. Then, a mathematical model of power spectral density (PSD) that characterises the switch voltage of the three basic DC-DC converters is derived. The mathematical model is validated by simulation of a buck converter operating in DCM. Analytical and simulation results show the effectiveness of PSD spreading of the dual randomised scheme compare to the simple randomised schemes. Moreover, the PSD analysis is confirmed by FFT (Fast Fourier Transform) analysis of the switch voltage. Finally, the effect of randomness levels on the PSD spreading is studied.
Genetic variability of Phaius and Dendrobium orchids based on molecular markers

This study aims to assess the diversity and degree of grouping of several types of orchids in Indonesia. Laboratory work was carried out at the Laboratory of the Center for Horticulture and Tropical Studies IPB by analyzing the variability of orchids using RAPD. Plant material is taken from the orchid collection at the Bogor Botanical Gardens. The relationship between 9 orchids was analyzed using binary phenotype data and DNA band patterns as assessed by amplification of 2 random RAPD primers. The cluster analysis was carried out under the NTSYSpc version 2.02 program and the UPGMA SimQual function. The results showed genetic diversity of the genus Phaius and Dendrobium. Based on primers OPA7 and OPA9 with a similarity coefficient of 0.4 divided into 4 groups. Group I consisted of Phaius tankervilliae, Phaius montanus and Phaius callosus. Group II consisted of Dendrobium mirbelianum, Dendrobium lamellatum, Dendrobium liniale and Dendrobium biggibum. Group III consists of Dendrobium anosmum. Group IV consisted of Phaius ambionensis. The conclusion of this study is that there are 4 groups from the genus Phaius and Dendrobium based on the genetic marker RAPD.
Cooperative Caching Strategy With Content Request Prediction in Internet of Vehicles

In order to mitigate the impact of explosively increasing data traffic on content request services in the Internet of Vehicles (IoV), edge caching technology is implemented in IoV to accelerate the response process of content requests and release the backhaul burden of the base station. However, the content popularity obtained by the traditional content popularity method cannot capture the requests of vehicles accurately due to the time-varying characteristics of the content popularity, which results in a relatively low cache hit ratio. Thus, this article proposes a cooperative caching strategy with content request prediction (CCCRP) in IoV, which precaches the contents requested by vehicles with greater probability in other vehicles or the roadside unit (RSU) to reduce the content acquisition delay. Specifically, vehicles are first clustered using the ${K}$ -means method to simplify the process of vehicle requesting and content transmission. Then, content requests from vehicles are predicted using the long short-term memory (LSTM) networks according to the historical content request information. Finally, reinforcement learning method is adopted to solve the objective function to obtain the optimal caching decision, which improves the Quality of Service (QoS) of vehicle requests. Simulation results demonstrate that CCCRP can improve the cache hit ratio and reduce content acquisition delay effectively. For example, the cache hit ratio of CCCRP can be increased by 5% and 7% compared to the traditional LFU and LRU caching strategies when the Zipf parameter equals 0.7, respectively.
THE PROCESS OF KNOWLEDGE MANAGEMENT ENGAGEMENT AND ORGANIZATIONAL ETHICAL CLIMATE ON EMPLOYEE PERFORMANCE MEDIATED BY MANAGEMENT SATISFACTION OFACEH CIVIL SERVICE AGENCY

This study intends to examine the process of knowledge management engagement in employee performance as mediated by the knowledge management satisfaction of Aceh civil service agency (BKA). The population in this study was 108 leaders and employees at the Aceh Civil Service Agency. Sampling used the census method. Data were collected using a questionnaire. This research model was tested by Structural Equation Modeling (SEM). The results of research at the aceh civil service agency directly prove that: 1) knowledge management engagement affects management satisfaction; 2) organizational ethical climate does not affect management satisfaction; 3) management satisfaction affects employee performance; 4) management engagement affects employee performance, and; 5) ethical climate does not affect employee performance. Based on the results of mediation testing, it is found that 1) knowledge management engagement affects employee performance is mediated by management satisfaction, wherein this model the management satisfaction variable acts as a partial mediator, and; 2) on the contrary, organizational ethical climate does not affect employee performance, although it is mediated by management satisfaction. These findings contribute to the renewal of the theory, wherein the model of causality, some proved influential but some did not. In fact, to improve employee performance at the Aceh Civil Service Agency, Knowledge Management Engagement is a major variable that must be improved, both directly affecting employee performance and through increasing management satisfaction. For future researchers, it is hoped that they can develop this proven research model by adding other variables such as organizational commitment and organizational citizenship behavior. Keyword: Knowledge Management Engagement, Organizational ethical climate, Employee Performance, Management Satisfaction.
Family Support and the Media in Ireland: Newspaper Content Analysis 2014–2017

ABSTRACT The objective of this paper is to inform a critical analysis of how the media portray family support in Ireland. Findings of a content analysis carried out on national and regional Irish newspapers between 2014 and 2017 are presented which describe communication about family support services provided by Tusla—Child and Family Agency. Results show that even though child protection was not used as a specific search term, news items on the Child and Family Agency and family support were usually focused on child protection and children in care. Results also show that family support activities are reported more positively in local papers compared to national papers. In the discussion, we argue that these findings are important as the media plays an important role in how the public understand, view, and engage with integrated child protection and welfare systems. We consider the implications of the research and advocate working with the media to inform their interpretation and understanding of family support. We suggest this is important as the manner in which the media communicate and frame family support as part of the overall child protection and welfare system is one of the main influences on public understandings and awareness of preventative family support and child welfare services.
Cardiac Manifestations of Multisystem Inflammatory Syndrome in Children (MIS-C) Associated with SARS-CoV-2 Infection

Context: Multisystem inflammatory syndrome in children (MIS-C) is an emerging condition after the spread of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, termed COVID-19. This study aimed to describe the cardiac manifestations of children diagnosed with MIS-C. Evidence Acquisition: This narrative review was conducted by searching the PubMed, Scopus, and Google Scholar databases to review MIS-C cardiac manifestations up to September 30, 2020. The demographic features, past medical history, clinical signs and symptoms, cardiac involvement, and the type of COVID-19 diagnosis confirmation were extracted. Results: In many children, MIS-C seems to be a post-infectious complication of the COVID-19 infection. This syndrome affects multiple organs and has various clinical manifestations mimicking Kawasaki disease. Patients frequently present with persistent fever, kidney injury, gastrointestinal (GI) problems, neurologic symptoms, mucosal changes, conjunctivitis, and cardiac involvement. Children with MIS are more likely to present with hypotension, shock, and cardiac dysfunction, rather than coronary artery abnormalities and arrhythmia. Children with MIS need close observation; some need to be hospitalized, and a few may need a Pediatric Intensive Care Unit (PICU) admission. Treatment currently includes anticoagulants, IV immunoglobulin, and anti-inflammatory drugs. Conclusions: As a novel syndrome associated with SARS-CoV-2 infection, MIS-C is potentially lethal. Cardiac manifestations, including coronary and myocardial involvement, are common and should be carefully identified. With prompt diagnosis and proper treatment, most children will survive, but the outcomes of the disease are unknown, so long-term follow-ups are required.
A Photonic-Assisted Generation of Triangular Waveform With Frequency Octupling

A new photonic approach for generating a triangular waveform with octupled-frequency is presented. The core principle is the frequency outupling technique based on two cascaded dual-parallel Mach-Zehnder modulators (DP-MZMs). A dual-electrode MZM (De-MZM) and a single mode fiber (SMF) are subsequently applied to manipulate the signal spectrum to satisfy the characteristics of that of a triangular waveform. By applying a 2-GHz radio frequency (RF) signal, a full-duty-cycle triangular waveform with repetition rate of 16-GHz is obtained. The high frequency multiplying factor shows great potential in generating a cost-effective waveform. Additionally, the phase imbalance of hybrid coupler and bias drift of MZM have been considered in our simulation, which further verify the feasibility and stability of our proposal.
Effect of concomitant use of antihypertensives and immune check point inhibitors on cancer outcomes

Objectives: Antihypertensives and cancer have a complex relationship. Among the antihypertensives, renin--angiotensin system inhibitors have strong immune modulatory activities that may affect immune check point inhibitors-related outcomes in cancer patients. We evaluated the association between concomitant use of renin--angiotensin system inhibitors and other antihypertensive agents with survival/toxicity outcomes from atezolizumab. Methods: A post hoc analysis of individual patient data from seven clinical trials of lung, renal or urothelial cancers was performed. Users and nonusers of antihypertensive classes were compared for overall survival, progression-free survival and immune adverse events. Cox proportional hazards were calculated between the groups and reported as hazards ratio and 95% confidence interval (95% CI). Results: Of the 3695 patients, 2539 were treated with atezolizumab and the rest with chemotherapy. Twenty-four percent of patients were on a renin--angiotensin system inhibitor at trial commencement. No statistically significant difference in overall survival (hazard ratio 0.92, 95% CI 0.79–1.07, P = 0.29), progression-free survival (hazard ratio 0.95, 95% CI 0.84–1.08, P = 0.42) or immune adverse events (odds ratio 0.94, 95% CI 0.76–1.15, P = 0.55) between renin--angiotensin system inhibitor users and nonusers were identified in the atezolizumab-treated cohort. Other classes of antihypertensives were also not associated with survival. Conclusion: Concomitant use of antihypertensives including RASi was not associated with survival and immune-related safety outcomes during atezolizumab therapy for solid cancers. Future studies should evaluate the association between antihypertensives and other ICI as well as ICI combination interventions in clinical trials and real-world settings.