bluuebunny/crossref_metadata_2025 huggingface dataset:
Facially Selective Oxo-Diels-Alder Cycloadditions of α-Dienyl-β-Lactam: An Entry to Pyrano Tethered β-Lactams Bifunctional Hybrids
Authors: Kaur Mann Maninderjeet , Kumar Rupesh , Bhargava Gaurav
Published: July 2022

The functionalization of -lactams at C-3 position are useful for the strategic improvement in both the dimensions, namely synthetic utility, as versatile intermediate in organic synthesis and biological potential of these heterocyclic systems. The present manuscript involved the -facial selective synthesis -lactam hybrids employing highly regioselective and diastereoselective oxo-Diels–Alder reactions of diethyl ketomalonate with -dienyl--lactam with stereocentres at its - and - positions. This protocol provided the cycloaddition of - and - stereocentric diene with symmetrical heterodienophiles forming biologically potent regioselective and diastereoselective -lactams substituted pyrano bifunctional hybrids in good yields and -facially selectivity.
A New FL-MPPT High Voltage DC-DC Converter for PV Solar Application
Authors: Sutikno Tole , Subrata Arsyad Cahya , Jusoh Awang
Published: July 2022

To reduce the effects of global warming, there is an increasing need for renewable energy sources. Several studies have been carried out on photovoltaic (PV) systems to maximize their potential as an alternative electricity generator. However, various power converters for high voltage ratio applications have multiple drawbacks. This research was carried out to develop a power converter topology connected between the PV and the load for the need. In this research, the high step-up DC-DC converter for high-voltage gain conversion ratio and high efficiency is proposed. Furthermore, the fuzzy logic-based Maximum Power Point Tracking (MPPT) technique connected to the power converter was used to maximize the power converted from PV in changing atmospheric conditions. The MPPT control with fuzzy logic controller (FLC) was analysed and compared with the perturb and observe (P&O) algorithm. The results showed that the FLC algorithm could control the high step-up (HSU) DC-DC converter with an output voltage of 29% higher than the P&O algorithm.
Hour Block Based Demand Response for Optimal Energy Trading Profits in Networked Microgrids
Authors: Vankudoth Lokesh , Badar Altaf Q. H.
Published: July 2022

Microgrids are a small-scale power system that integrates Distributed Generation, Energy Storage Systems and controllable loads. The intermittent and variable nature of renewable generation leads to a complex control mechanism required for Microgrids. Microgrids that are geographically close to each other are interconnected to form Networked Microgrids. Networked Microgrids provide enhanced benefits of resource sharing to Microgrids, thus, improving the reliability and operation costs while reducing the environmental impact. The Microgrids, based on their generation and load profiles, can perform energy trading within the Networked Microgrid system for achieving optimized operational costs. In this paper, the impact of a novel hour block-based demand response program in Networked Microgrids is explored. In the proposed model, hour blocks are formed in a Networked Microgrids environment, dependent on generation and load imbalance, the role of Microgrids and the Time-of-Use tariff system. The Particle Swarm Optimization method is used to optimize the individual and overall economic benefits of Microgrids in the Networked Microgrid system. The simulations of the proposed method are performed on a Networked Microgrid system having 4 Microgrids. The results show a credible reduction in costs of operation for all Microgrids and the system as a whole.
Energy Demand Analysis for Office Building Using Simulation Model and Statistical Method
Authors: Shakouri Mahdi , Ghadamian Hossein
Published: July 2022

This research is focused on the development of a reliable energy demand model for a case study using a comprehensive dual approach including: (1) engineering load calculation and simulation model via software and (2) statistical analysis. The simulated model is capable to cover the analysis of the cooling and thermal loads for a studied building. Concerning the building operation perspective, the statistical models were provided using the real measured data and multivariable regression analysis. For evaluating the performance of the developed statistical models, the authors have calibrated the models with the real measured data and then the impact of relevant variables has been evaluated through statistical tests and sensitivity analysis.

According to the results of this study, the rated power for the cooling system and the capacity of the thermal system are 75.8 (kW) and 147.7 (kW), respectively. Based on the results of the statistical models, the measured and modelled data have been correlated with a strong coefficient of determination. The accuracy of models has been examined by calculating the statistical error indices with a suitable finding. Thus, the proposed models can be considered as an accurate findings for the energy performance analysis and demand forecasting objectives.
Solar PV Array Fed Single Stage BLDC Motor Drive for Water Pumping System
Authors: Kar Biranchi Narayan , Samuel Paulson , Pradhan Jatin Kumar , Mallick Amit
Published: July 2022

A single-stage photovoltaic-fed field-oriented controlled brushless DC (BLDC) motor drive for water pumping using a 2-degree of freedom (DoF) controller is presented in this paper. The proposed 2-DoF controller consists of a feedback and feedforward loop design. A feedback loop is used to maintain stability and desired performance, in which the PI controller is utilized for controlling the DC voltage at the outer loop, which generates the necessary speed reference. A Fuzzy logic controller is then used in the inner loop to achieve a faster speed response of the BLDC motor. Further, the performance of the system is made faster by incorporating dynamic feed-forward control. MATLAB Simulink is used to design and simulate the system. The OPAL-RT simulator is used to validate the system’s performance in real-time.
Optimal WTGUs Placement for Performance Improvement in Electrical Distribution System Using Improved TLBO
Authors: Ramana Thiruveedula , Reddy G. Nageswara
Published: July 2022

The optimal location and size for Distributed Generation (DG) to get maximum advantages and improve the performance of electrical distribution systems (EDS) is a difficult challenge to solve. With EDS performance indices, this research offers a constrained generalized multi-objective performance index (MOPI) objective function. Improved Teaching Learning Based Optimization (ITLBO) is used to solve the proposed objective function by removing the convergence issue of basic Teaching Learning Based Optimization (TLBO). By optimizing the MOPI, the Wind Turbine Generation Unit (WTGU) is examined for single and multiple DG placement and sizing in EDS performance improvement. The ideal approach reduces the burden of EDS consumer loss allocation by minimizing power losses, improving the consumer voltage profile and voltage stability, increasing the line loadability margin (LLM), and increasing the line loadability margin (LLM). The performance test was carried out on a 33-node EDS and used MATLAB software to demonstrate the efficacy of optimal solution.
Optimal Dispatch of CCHP Microgrid Considering Carbon Trading and Integrated Demand Response
Authors: Li Hong , Lin Lanxin
Published: July 2022

With the development concept of “low-carbon economy”, both the emission reduction and energy conservation has comes the important development direction of power industry. In this context, we provide a CCHP microgrid optimal dispatching model that considers the integrated demand response and the carbon trading mechanism. This paper presents a carbon trading mechanism into the microgrid model that includes electricity-to-gas equipment. Posteriorly, a price-based power demand response model and a cooling and heating load demand response model that takes into account heating comfort ambiguity are established, and the demand response of cooling, heating and electricity load is constrained through users’ satisfaction. Subsequently, a low-carbon economic dispatching model of the CCHP microgrid with the minimum objective function of the operating total cost including electricity interactive cost, natural gas energy cost, renewable energy abandonment cost, carbon trading cost, power-to-gas operating cost and users’ compensation cost was established. It is solved by the adaptive differential evolution algorithm. In the end, we provide an toy example to illustrate the effectiveness of the proposed microgrid model.
Multi-Objective Optimal Economic Dispatch of a Fuel Cell and Combined Heat and Power Based Renewable Integrated Grid Tied Micro-grid Using Whale Optimization Algorithm
Authors: Prakash S. Naveen , Kumarappan N.
Published: July 2022

Micro-grids are practical solution for combining distributed energy resources and combined heat and power units in order to satisfy the system power and heat demands. Nowadays, in order to integrate both renewable and non-renewable energy resources like photovoltaic, wind turbine, combined heat and power systems and fuel-cell unit; micro-grid seems to be a good idea. The aim of this paper is to obtain optimal scheduling of proposed generating units and to reduce the total operational cost and net emission of the system through economic/environmental power dispatch, while considering the impact of grid tied and autonomous mode of operation and satisfying the operational constraints. In this paper, a novel whale optimization algorithm is employed to solve this multi-objective problem. The obtained optimal results through this proposed whale optimization algorithm represents the efficiency, feasibility and capability of handling non-linear optimization problems in an efficient way compared to other optimization techniques. The proposed system is studied in a 24-h time horizon. The results obtained from this proposed technique are compared with other techniques which are recently employed.
The Implementation of Numerical Codes for the Analysis of Solar Flux Inputs and the Optimization of Thermal Comfort for a Monobloc Habitat
Authors: Oudrane Abdellatif , Aour Benaoumeur , Hamouda Messaoud
Published: July 2022

The purpose of this work is to design computer codes to estimate the different thermal exchanges of the facades of a habitable envelope with its environment in order to optimize thermal comfort. This optimization is based on the use of real climate data from the region under consideration. To achieve this goal, we have developed five fundamental codes in FORTRAN language. The first code consists in Modelling the flow of the heat transfer fluid in the heating slab pipe. The second is designed to model the heat transfer by conduction within the concrete slab. The third is developed for the Modelling of thermal exchanges in a habitable envelope assimilated to a parallelepipedal cavity based on the nodal method. The fourth code is reserved for the Modelling of solar radiation by evaluating the wage flux density on different positions of the walls. The fifth and last code is dedicated to the evaluation of the perfect thermal coupling between the concrete slab and the heat transfer fluid pipes. The validation of the models implemented in the calculation codes was made on the basis of data measured recently for a clear sky of solar radiation at the radiometric station of the renewable energies research unit in the Saharan environment URER’MS of Adrar. The results obtained showed a very good agreement between the calculated values using the computational codes developed and those measured by the radiometric station of the URER’MS during the typical day.
An Improved 30 Gbps-Class Large-Capacity Packet Processing Method Using Core Isolation Technology
Authors: Kwon Youngsun , Son Moonhee , Chang Hoon
Published: July 2022

With the spread of 5G services and the development of IoT technology, network traffic for information delivery is increasing in capacity. As network traffic increases, cyber threats also increase, resulting in an increasing importance on traffic analysis. The existing packet processing engine generates a signature by analyzing the characteristics of the attack after the occurrence of suspicious traffic, and based on this, it is difficult to properly respond to new and variant attack traffic because a manual response method is performed to detect the same attack. In addition, even during a network operation, only analysis results generated by passive filtering appear, and when abnormal or suspicious traffic is observed, the quality of the report is often affected by the analysis capability of the administrator. The packet processing method proposed in this paper applies the core isolation method to the NUMA structure applied to the existing 20 Gbps packet processing engine to increase the accessibility of the existing NUMA memory structure and lower the packet drop rate to enable high-capacity 30 Gbps traffic processing. Using the proposed processing engine, it is possible to determine the degree of possibility of abnormal traffic, preferentially by a quick analysis of suspicious traffic rather than a detailed analysis of traffic.
Editorial
Authors: Alampi Maria Elena , Graça André Rui , Sticchi Francesco
Published: July 2022

The following introduction to the Special Issue addresses the problematic definition of the notion of precarity by highlighting its multifaceted value and possible interpretation in relation to the moving image. It also aims, at the same time, to show some directions in which, in accordance
with the work of many scholars, it is possible to come with effective transversal modes of adopting and applying the concept. In this sense, the introduction also shows how the various papers of the Special Issue are capable to contribute to this understanding in unique and productive ways.
Teamwork Approach in Management of Zygomaticomaxillary Complex (ZMC) Fracture with Globe Rupture: A Case Report
Authors: Ratna Martina Nungki , Manalu Ester P Andyni , Ramadhania Adilla , Simbolon Bony P
Published: July 2022

Introduction : Zygomaticomaxillary complex (ZMC) fractures are one of the most common fractures of the facial skeleton. Zygomatic fractures can cause ocular and mandibular functional impairment, along with cosmetic defects. The characteristic clinical signs of zygomatic bone fracture include diplopia, infraorbital nerve paraesthesia, flattening of the cheek, and trismus, whereas maxillary fracture may typically cause flattening of the midface and malocclusion. Therefore, surgical reconstruction is required to restore the function and appearance.Case Report : A 31-year-old man with ZMC fracture and globe rupture underwent open reduction and internal fixation using plate and orbital mesh. We collaborated with an ophthalmologist who performed enucleation and tarsorrhaphy.Discussion : The reconstruction improved functional and physical aspects and therefore psychological wellbeing. The main goal of the ZMC fracture treatment is to reconstruct the face in terms of functions and aesthetic. Furthermore, reconstruction of the left orbit (orbital rims and walls) as a secondary objective despite the blind eye, improved his appearance enabling formation of a pocket into which an eye implant was inserted. Satisfying functional and aesthetic outcome was achieved in this patient.Conclusion: A teamwork approach in surgical reconstruction for this case with ZMC fracture which always has an orbital component, was recommended to obtain an effective and optimal result. Both plastic surgeon and ophthalmologist can elaborate patient needs for facial reconstruction especially orbital region with good result.
Repair of Enophthalmus in Neglected Tetrapod Zygoma Fracture with Diced Cartilage Graft and Fascia Lata Sling Graft: A Case Report
Authors: Bangun Kristaninta , Halim Jessica , Handayani Siti
Published: July 2022

Introduction: Zygoma fractures with orbital involvement, are the most common midfacial traumas, which cause severe aesthetic and functional sequelae. Late reduction of orbital floor fracture may result in entrapment of orbital soft tissue, predisposing the occurrence of enophthalmos. This article aimed to report enopthalmus correction in neglected tetrapod zygoma fracture case with autologous diced cartilage graft and fascia lata graft.Case Presentation: A 42-year-old female was injured in a traffic accident 8 years ago. Facial fracture was not repaired surgically, resulting in facial asymmetry and diplopia. Physical examination revealed right-sided zygoma deformity, 5mm dystopia, depressed malar eminence, gaze restriction and enophthalmus on the right eye. 3D CT scan confirmed a malunited neglected tetrapod zygoma fracture.Result: Corrective osteotomy was performed to reconstruct the tetrapod zygoma fracture using combination of bicoronal, infracilliary, and maxillary vestibular approach. 4-point fixation and stepladder modification was used. 1.6 cc of cartilage-derived diced bone graft was inserted on the posterior orbital floor to repair enophthalmos. Six months follow-up revealed improved dystopia and malar prominence. Additional surgery was done to repair scleral show and smoothen and augment lower lid volume using 4.5x0.6 cm fascia lata graft hammocked from the medial canthus to lateral orbital bone.Discussion & Conclusion: Long neglected zygoma fracture possessed a difficulty in reconstructing malunited zygoma articulation. Good aesthetic and functional outcome are achievable following use of diced cartilage and fascia lata graft for enophthalmus correction in neglected zygoma-orbital fracture, suggesting the role of fascia lata sling graft for treatment of scleral show and lower lid volume replacement.
Comparison Study of Bacterial Profile, Wound Healing, and Cost Effectiveness in Pressure Injury Patients Using Treatment Honey Dressing and Hydrogel
Authors: Putri Nandita Melati , Margareta Lumbuun Ruth Fitri , Kreshanti Prasetyanugraheni , Saharman Yulia Rosa , Tunjung Narottama
Published: July 2022

Background : Pressure injury is a localized soft tissue injury caused by prolonged pressure over bony prominence. Most published papers used Manuka honey as dressing, while this product is expensive. As this reason, this study will use local product honey called Nusantara honey, to prove the use of local honey has better healing process, bacterial profile, and cost effectiveness, compared to the standard dressing, hydrogel.Method : This is a one-month experimental study conducted in patients with pressure injury that referred to our division. Parameter of the bacterial profile was taken from deep-tissue specimen. The healing process was examined with Pressure Ulcer Scale for Healing (PUSH) Tool. Cost was accumulated after all the treatment. Data was analysed with t-Test or Mann Whitney (if the distribution is not normal), with statistical significance was define as p<0.05..Result : Of 26 wounds, 12 were randomized to hydrogel and 14 to honey dressing. Characteristics were determined by sex, age, body mass index, level of consciousness, mobilization status, immobilization etiology, comorbidities, grade and location of ulcer, hemoglobin, leukocytes, and albumin level. There was clinically significant wound size reduction in honey dressing according to PUSH Tool (p=0.118). The bacterial profile and reduction were similar. Honey dressing appeared to be more cost effective in terms of dressing cost (p<0.001) and lower total cost.Conclusion: The local honey dressing has better wound healing outcome, although it is not statistically significant. Its capability of decreasing pathogens is similar with hydrogel, with lower cost, particularly the dressing cost. This local honey dressing could be a good choice as wound dressing in areas where the modern dressings are not available.
Paramedian Forehead Flap for Nasal Tip Reconstruction Related to Barbed Suture Infection
Authors: Ariani Yuni , Wicaksono Bambang
Published: July 2022

Introduction : The nasal tip abscess is a rare pathology that affects the soft tissue of the nasal tip, with risk of damaging the cartilaginous framework with the resulting alteration of the anatomy and function of the nose, if not treated properly.Case Presentation : A 22-year old female patient developed progressive defect with pain sensation at her nasal tip after bumping her nose 2 months ago and she admitted that she underwent a thread rhinoplasty 1 year ago. The reconstructive surgery was performed by excision of the ulcer, threads evacuation, and closing the defect with paramedian forehead flap procedure.Summary: In this case, the problem can be treated very well with the paramedian forehead flap procedure which is an excellent option for nose reconstruction.
EFFECT OF DRUG ABUSE ON THE ACADEMIC PERFORMANCE OF UNDERGRADUATE STUDENTS IN EDO STATE
Authors: ABIKWI DR. MARGARET , OKAFOR DR. CHUKUJINDU
Published: July 2022

The study determined the effect of drug abuse on the academic performance of undergraduate students in Edo state. Two research questions and two hypotheses were raised to guide the study. The study adopted descriptive survey research design. The population of the study was made of 9,805 final year undergraduate students from seven universities in Edo State. The simple random sampling technique was used to select 245 final year undergraduates students used for the study. The instrument for data collection was a structured questionnaire on a four (4) point rating scale. The instrument was validated by two experts from Benson Idahosa University, Benin City. Spearman rank order was used to determine the reliability of the instrument which yielded a reliability coefficient of 0.86. Out of the 245 questionnaires administered to the undergraduate student respondents, 218 copies were retrieved and used for analysis. Mean and standard deviation were the descriptive statistical tools were used to analyze the two research questions while t-test was the inferential statistics used to test the null hypotheses at 0.05 level of significance. For the research questions, the decision was based on the criterion mean of 2.50. For the hypotheses, since the calculated value of t (t-cal) was less than the table value of t (t-crit), the null hypotheses were accepted. The findings of the study revealed that the causes of drug abuse among undergraduate students are psychological, social and biological; and these have effect on studentsâ€™ academic performance. The study recommended among other things that Government should make drug education compulsory at all levels of the educational system as this will reduce the ignorance level of what essentially constitute drug abuse and the likely causes and effects of it among undergraduate students. Keywords: Drug, Drug Abuse, Academic Performance, Undergraduate Students.
Drug repurposing for the treatment of Type 2 Diabetes and Gestational Diabetes Mellitus
Authors: Kumar Akshay , Sharma Amarish Kumar
Published: July 2022

Currently, repurposing an existing medicine for treatment of a different disease is a good and lucrative choice because of the long and time-consuming research and development process of new drugs and the high attrition rate. The utilization of low-risk chemicals, lower overall research costs, and shorter development timelines are all contributing to its growth and appeal. Ideal repurposed medication candidates have been found using a variety of date- and experimental-driven methodologies. However, there are a number of technological and legislative issues that must be addressed. Type 2 and gestational diabetes mellitus are both forms of diabetes mellitus, although gestational diabetes mellitus is a transitory condition that can lead to type 2 diabetes in the future. About 90% to 95% of diabetic people have type 2 diabetes, which is the most common form of the disease. Currently medications used for the treatment of these two diabetes is basically Metformin which often regarded as first line of treatment for Diabetes, but it is not affective too much and just control the condition. In order to identify a more effective therapy for Type 2 diabetes and gestational diabetes, we are going to use the Drug repurposing approach to look at novel pharmaceuticals and treatments and alternative combinations of current drugs. Medicine repurposing strategies and their usage in the search for a better drug or combination of drugs for the treatment of Type 2 Diabetes and Gestational Diabetes have been addressed in this review article.
Analysis and Improvement of Performance Criteria in Vehicular Communication
Authors: Helmi Rasa Iffat
Published: July 2022

A vehicular ad hoc network is one of the spontaneous engenderments of a wireless network of mobile contrivances. This is the maximum developing studies area within the discipline of telecommunication. Resulting from rapid topology converting and common disconnection, it miles immensely difficult to layout a green routing protocol for routing statistics among cars, known as the car to conveyance conversation and conveyance to roadside infrastructure. VANET will inaugurate a brilliant revolution in Wi-Fi communique of speedy facts transmission, network availability, protection, and safety by using a superior application phase. VANET faces several challenges in phrases of Quality of Service and its Overall Performance which relies upon several parameters including conveyance density, throughput, packet delivery ratio, end-to-end delay, emergency message inter-arrival time, packet loss ratio, average cluster time, protocol overhead, delay, broadcast count, and so forth. Performance evaluation and amelioration of the C2C communique associated with packet delivery ratio and throughput is the concern in this research. Furthermore, the destiny of the C2C communique; advantages, and barriers also are discussed right here. Eventually, the top demanding situations of destiny paintings on VANETs are presented. I evaluate the performance metrics which include packet delivery ratio and throughput utilizing the OMNET++ simulator.
Embracing with Urban Transport
Authors: Chachondia Ar. Himanshi
Published: July 2022

Article gives an outline of urban transportation and issues in India and it will focus on essentially centers around those spaces that are significant according to a strategy perspective and will be explaining the patterns of vehicular development and accessibility of transport. Indian urban areas ought to be planned as multimodal Transportation which diminishes the need of customized modes and lifts public vehicle framework and increase urged to walk and cycle which requires administration measures.
Reading the Cold War through Outer Space: The Past and Future of Outer Space
Authors: Yang Pachankis,
Published: July 2022

The article takes a history based technical analysis on the governing activities by outer space laws. It outlined the spirit of the outer space law and treaty by the scientific development of the earthâ€™s orbits & solar objectsâ€™ orbits. It focuses on the contamination of outer space by human activities in large scale structure with concluding scientific evidence. It analyzed geopolitical conflicts in terms of satellite technologies. They are analyzed based on the utility-science dichotomy, and the subject(s) that ultimately benefit from and control the utility. The texts are arranged by the contrast between the American led globalization and Russian hegemony with dictatorial powers. The technical analysis is nuclear science based with epistemology.
Transperineal ultrasonography for treatment response evaluation in children with perianal Crohn’s disease
Authors: Jung Jae Hyeop , Ryu Young Jin , Kim Ji Young , Yang Hye Ran
Published: July 2022

Purpose: This study assessed the performance of transperineal ultrasonography (TPUS) in evaluating the treatment response in children with perianal Crohn’s disease (PACD) compared with pelvic magnetic resonance imaging (MRI).Methods: This retrospective study was approved by the Institutional Review Board of our institution, which waived the requirement for informed consent. Twenty-nine patients (19 boys and 10 girls; median age, 14 years [range, 8 to 18 years]) with 56 fistulas were examined. Each fistula’s thickness and abscess size were measured using both modalities, and treatment response was classified as positive or negative based on each modality. The concordance of the classifications was compared between TPUS and pelvic MRI. A receiver operating characteristic curve (ROC) was used to evaluate the performance of TPUS.Results: TPUS found 80.4% (45/56) of the fistulas. On MRI, 39 fistulas (70%) were classified as having positive treatment responses, and the remaining 17 as having no response. The agreement of the classifications between TPUS and MRI was moderate (κ=0.486; P<0.001; Spearman ρ=0.573; P<0.001). Based on the ROC analysis with the MRI findings as a reference to distinguish positive from negative treatment responses, TPUS exhibited sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of 63.3%, 93.3%, 95.0%, 56.0%, and 73.3%, respectively.Conclusion: TPUS can be an appropriate adjuvant imaging modality for pelvic MRI to evaluate the treatment response of PACD in children when initial TPUS detects PACD with a location and imaging features comparable to those visualized on MRI.
Repository Networks: Past, Present and Future
Authors: Shearer Kathleen
Published: July 2022

Repositories represent critical infrastructure for open science / open scholarship. They preserve and provide access to a wide range of valuable research and educational resources, including articles, pre-prints, research data, images, software, and so on. However, the value of any individual repository is greatly enhanced when it becomes part of a distributed network, enabling resources to be more discoverable, linked with other related content, and part of the larger international corpus of international research. This article discusses the evolution of repository networks since the early 2000s and presents the current vision of the COAR Next Generation Repository Initiative to significantly enhance the networking capabilities of repositories.
Repositorien und Forschungsinformationssysteme bilden keine Dichotomie
Authors: Schirrwagen Jochen
Published: July 2022

Dieser Beitrag zeichnet gemeinsame Entwicklungslinien von Forschungsinformationssystemen und Repositorien nach. Beide Systemwelten haben sich zunächst unabhängig voneinander entwickelt, was ihrer Verankerung in unterschiedlichen Verwaltungseinheiten wissenschaftlicher Einrichtungen geschuldet ist. Im Zuge von Open Access und Open Science sowie steigenden Anforderungen an die Forschungsberichterstattung haben sich zunehmend Schnittmengen ergeben. In dessen Folge treiben Initiativen auf europäischer und nationaler Ebene die Konvergenz und Integration über Grundsatzvereinbarungen, Roadmaps, Leitlinien und Implementierungen beider Systemwelten voran.
Innovative Deviance in a Rule-Bound City-State
Authors: Yeo Wayne , Han Ling , Jiang Winnie , Natrajan Nitin
Published: July 2022

Funding and service provision are fundamental tenets of nonprofit organizations in Singapore. The advent of the COVID-19 pandemic has challenged the resilience of the nonprofit sector and beckoned the government to respond with digitalization programs that blend into the innovative capacity of the nonprofit sector. Consequently, digitalization has produced different versions of innovation that have helped tide nonprofits over this difficult time, in which crowdfunding has played an important role. In this article, we use two case studies to examine how nonprofits approach and situate crowdfunding in Singapore against the backdrop of the pandemic. One organization utilizes crowdfunding as the core of their fundraising model and views it as an essential part of their operation. During the pandemic, they even used this crowdfunding model to reach marginalized communities that tend not to be the target beneficiaries of the registered nonprofit organizations in Singapore. The other organization finds itself innovating within existing fundraising mechanisms, though it has experimented with crowdfunding. We argue that this case represents the strategy that most nonprofits are using during the pandemic by developing new and existing digital programs to attract potential donors. At the core of our argument, crowdfunding has the potential to expand the type of services and reach communities that tend to be overlooked or forgotten by present nonprofit structures in Singapore. By doing so, crowdfunding provides an outlet for these groups to voice their issues.
Ієрархія еволюційних рівнянь для кореляцій плинів твердих сфер
Authors: Гап’як І.В. , Герасименко В.І.
Published: July 2022

Обговорюється підхід до опису кореляцій у системі багатьох твердих сфер на основі ієрархії еволюційних рівнянь для кореляційних функцій. Встановлено, що побудована динаміка кореляцій лежить в основі опису динаміки як скінченного, так і нескінченного числа твердих сфер, яка описується ієрархіями рівнянь ББГКІ для редукованих функцій розподілу або редукованих кореляційних функцій.
Біфуркації максимальних атракторів неідеальних маятникових систем
Authors: Донецький C.В. , Швець О.Ю.
Published: July 2022

Вивчені сценарії переходу до хаосу для максимальних атракторів динамічних систем типу “сферичний маятник — електродвигун обмеженої потужності”. Встановлено, що перехід до хаосу максимальних атракторів відбувається за звичними у нелінійній динаміці сценаріями, попри те, що максимальні атрактори не є атракторами у традиційному розумінні цього поняття.
Збіжність однокрокового ітераційного процесу в задачах механіки непружного деформування, в яких враховується історія навантаження
Authors: Чирков О.Ю.
Published: July 2022

Розглядається однокроковий ітераційний процес розв’язання нелінійних крайових задач механіки непружного деформування, в яких враховується історія навантаження. За таких умов напружено-деформований стан залежить від історії навантаження і процес деформування повинен простежуватися на всьому досліджуваному інтервалі часу. Процес навантаження розбивається на окремі розрахункові етапи і для кожного з них крайова задача формулюється у вигляді нелінійного операторного рівняння в гільбертовому просторі. Початкові деформації в цьому рівнянні включають температурні, структурні та накопичені незворотні деформації на початок етапу навантаження. Незворотні деформації залежать від процесу деформування і визначаються з урахуванням історії навантаження. Аналіз збіжності ітераційних методів розв’язання нелінійних крайових задач, в яких враховується деформаційна історія навантаження, обмежуються зазвичай доведенням збіжності послідовних наближень для поточного етапу навантаження. Відомі оцінки збіжності методів пружних розв’язків і змінних параметрів пружності не враховують похибку обчислення початкових деформацій, які залежать від історії непружного деформування і визначаються на основі наближеного розв’язання крайової задачі на попередніх етапах навантаження ітераційними методами. Фактично на кожному етапі навантаження замість вихідної крайової задачі, сформульованої у вигляді нелінійного операторного рівняння, розв’язується наближене рівняння, в якому враховується похибка обчислення незворотних деформацій за результатами розрахунків на попередніх етапах навантаження. Отже, відомі апріорні оцінки збіжності методів пружних розв’язків і змінних параметрів пружності встановлюють збіжність послідовних наближень саме до розв’язку цього наближеного рівняння. У цьому повідомленні викладено деякі аспекти, пов’язані з аналізом збіжності однокрокового ітераційного процесу, а також доведено оцінку збіжності послідовних наближень з урахуванням історії навантаження.
Influence of solar activity on water clusters. Annual variations 2015—2019
Authors: Shevchenko I.V.
Published: July 2022

The variations of solar activity and distribution of solar energy due to the rotation of the Earth around its axis and around the Sun exert a strong influence on water clusters, as a result of which their chemical reactivity in hydrolytic processes can vary in a very wide range. This phenomenon is well manifested in the hydrolysis of the phosphoric acid esters. The 5-year regular investigations (2015—2019) of the hydrolysis of triethylphosphite in acetonitrile show that the rate of this reaction with all other conditions being equal displays diurnal, very large annual variations, and is also modulated by the 11-year cycles of solar activity. Since water is a necessary constituent in all forms of life, the discovered diurnal and annual variations of water clusters’ reactivity may underlie the biological circadian and circannual rhythms. The results obtained also point to the fact that the chemical reactivity of water clusters depends on the geographic latitude, and, in summer and winter, it can be significantly different at the same time in the Northern and Southern hemispheres. At the equator, where there should be no seasonal differences, measurements of the rate of triethylphosphite hydrolysis may become an independent method for assessing the solar activity.
Синтез нової гетероциклічної системи [1,3]оксазоло[4,5-с][1,5,2]оксазафосфепіну
Authors: Бруснаков М.Ю. , Шишацька Ю.О. , Головченко О.В. , Броварець В.С. , Потіха Л.М.
Published: July 2022

Досліджено властивості діетилових естерів 2-арил-1,3-оксазол-4-ілфосфонових кислот, що містять (2-гідроксіетил)аміногрупу в положенні 5 оксазольного циклу, корисну для подальших структурних перетворень. Ацилюванням діетил 2-арил-5-[(2-гідроксіетил)аміно]-1,3-оксазол-4-ілфосфонатів мезилхлоридом у тетрагідрофурані у присутності триетиламіну отримані 2-{[2-арил-4-(діетоксифосфорил)-1,3-оксазол-5-іл]аміно}етилметансульфонати. N-Метил  заміщені метансульфонати у разі нагрівання з триетиламіном в ацетонітрилі, на відміну від стійких у вказаних умовах N-незаміщених похідних, перетворюються на продукти внутрішньомолекулярної циклізації 7-арил-1-етокси-5-метил-1,3,4,5- тетрагідро-1λ5-[1,3]оксазоло[4,5-с][1,5,2]оксазафосфепін-1-они – похідні нової гетероциклічної системи. Будову нових сполук доведено даними елементного аналізу, мас-спектрометрії, ІЧ спектрів і спектрів 1H, 13C, 31P ЯМР.
Синтез і кристалічна структура двошарових скандатів BaLa2–xDyxSc2O7
Authors: Тітов Ю.О. , Чумак В.В. , Тимошенко М.В.
Published: July 2022

Методами рентгенівської порошкової дифракції встановлені умови ізовалентного заміщення атомів La на атоми Dy в А-позиції двошарової перовськітоподібної структури BaLa2Sc2O7 за типом BaLa2–xDyxSc2O7: 0 ≤ x ≤ 1,0. Методом Рітвельда визначена тетрагональна (пр. група P42/mnm) кристалічна структура фаз BaLa2–xDyxSc2O7 з x = 0,2, 0,4, 0,5, 0,6, 0,8 та 1,0. Основою кристалічної структури BaLa2–xDyxSc2O7 є двовимірні (нескінченні в площині XY) перовськітоподібні блоки з двох шарів сполучених вершинами деформованих октаедрів ScO6. Cуміжні блоки зміщені один відносно одного на півребра перовськітового куба і чергуються один з одним у напрямку осі Z. За результатами розрахунку сум валентності зв’язків атомів Ba, La і Dy в поліедрах BaО9, BaО12 та (La2–xDyx)O9 і (La2–xDyx)O12 встановлено упорядкований розподіл атомів Ba і РЗЕ у шаруватій перовськітоподібній структурі BaLa2–xDyxSc2O7. Атоми Ва локалізовані лише в позиції 4f всередині перовськітоподібного блока, а атоми РЗЕ — лише в позиції 8j на межі блоків.

Сусідні перовськітоподібні блоки розділені шаром поліедрів (La,Dy)О9 та утримуюься разом міжблоковими зв’язками —O—(La,Dy)—O—. Встановлено, що ізовалентне заміщення атомів La на атоми Dy спричиняє зменшення довжини міжблокової відстані (La,Dy)—O2, збільшення ступеня деформації міжблокових поліедрів (La,Dy)О9 і зменшення ступеня деформації октаедрів ScO6.
Пригнічення термоіндукованої денатурації бичачого сироваткового альбуміну пропоксазепамом і його фармакологічні наслідки
Authors: Ларіонов В.Б. , Акішева В.С. , Головенко М.Я. , Макаренко О.А. , Борисюк І.Ю.
Published: July 2022

Сироватковий альбумін відіграє важливу роль у багатьох фізіологічних процесах. Останнім часом показано його безпосередню участь у реалізації протизапальних процесів. Багато нестероїдних протизапальних засобів, зокрема, виявляють захисний ефект проти теплової денатурації сироваткого альбуміну. У роботі наведено результати вивчення протизапальної активності in vitro пропоксазепаму та ряду похідних 1,4-бенз-діазепіну за ефектом протективного впливу на стабільність сироваткого альбуміну в умовах термічної денатурації. Протективний ефект сполук розраховували як ІС50, фізико-хімічні параметри визначали за допомогою програм ACD/Labs 12.01 та Chem Axom (Marvin Sketch 21.7). Встановлено, що за величинами ІС50 діазепам і пропоксазепам майже вдвічі перевищують референтний препарат ібупрофен. Сполуки з вільною гідроксигрупою в положенні 3 (оксазепам та 3-гідроксипропоксазепам) виявляли менший ефект, що може бути пов’язано з їх здатністю до зв’язування з бичачим сироватковим альбуміном. Поляризованість молекули похідних 1,4-бенздіазепіну більшою мірою впливає на їх зв’язування з бичачим сироватковим альбуміном та прояв їх захисної дії, ніж ліпофільність, що дає підставу припустити значний внесок індукційної взаємодії у цей процес.
Розроблення гідрофітної споруди типу біоплато для цілей фіторемедіації
Authors: Міхєєв О.М. , Лапань О.В. , Маджд С.М. , Черняк Л.М.
Published: July 2022

Розроблено плавучу конструкцію біоплато, біотичною складовою якої є наземні рослини, для очищення водних об’єктів від токсичних речовин. Для конструювання біоплато як субстрат використано інертні в хімічному відношенні плавучі матеріали: перліт, керамзит, гранульований пінопласт, вермикуліт, коркову пробку. У результаті випробування субстратів з’ясовано, що найбільш оптимальним у використанні є гранульований пінополістирол (полістирол). Дослідження різних варіантів пророщування насіння в конструкції біоплато показало, що його розміщення поверх субстрату є найкращим варіантом. Для оптимізації гідрофітної споруди використовували сітку, що дало змогу збільшити загальну щільність біоплато. Проведено порівняльне дослідження ефективності очищення водного середовища від іонів радіоцезію біоплато з рослинами пшениці різного сорту. Підтверджено, що ефективність сорбції наземними рослинами іонів 137Cs залежить від природи і концентрації макрокатіонів у водному середовищі.
PosterBot: A System for Generating Posters of Scientific Papers with Neural Models
Authors: Xu Sheng , Wan Xiaojun
Published: July 2022

Posters are broadly used to present the important points of academic papers and can be seen as a special form of document summarization. However, the problem of automatic poster generation is under-investigated. In this paper, we present PosterBot, an automatic poster generation system for academic papers. Given a scholarly paper, PosterBot takes three steps to generate the poster. It first selects the most important sections, and then generates corresponding panels from them. Finally, all panels are integrated to get the complete poster. The demonstration shows the efficacy of our proposed system.
A New Biomarker in The Distinction Between Stable Coronary Artery Disease and Acute Coronary Syndrome:Thiols
Authors: ERGÜN Gökhan , KELEŞOĞLU Şaban , TEKİN Kemal , ÇALAPKORUR Bekir , BALCI Fatih , EREL Özcan , NEŞELİOĞLU Salim , ELCİK Deniz
Published: July 2022

Backraund; Thiols are important elements for oxidation reactions and under oxidative stress. The aim of this study was to determine thiole levels, an antioxidative marker in CAD patients with stable and acute coronary syndrome.
Methods; 210 of the patients included in the study were diagnosed with acute coronary syndrome (ACS), 205 consisted of patients with stable angina pectoris (SAP). Thiol groups levels and thiol/disulphide homeostasis was measured by spectrophotometrically.
Results: Native thiol and total thiol levels, disulfide/natural thiol and disulfide/total thiol ratios were decreased in the ACS groups compared to the SAP groups
Conclusions: Thiol levels and thiol / disulfide ratios can be used as markers to evaluate acute coronary syndrome.
Relación entre variables psicosociales y actitud hacia el envejecimiento
Authors: Pozo Bardera Cristina , Madrid Vegas Kareen Eleeng , Fernández Cezar Raquel , Solano Pinto Natalia
Published: July 2022

Los estereotipos asociados a las personas mayores y los procesos de envejecimiento constituyen una preocupación sanitaria y social relacionada con el envejecimiento activo (OMS, 2016). Las personas mayores han sido objeto de preocupación en la pandemia por la COVID-19, no solo por su mayor riesgo de mortalidad y contagio, sino por el riesgo a ser discriminado y desarrollar sentimientos de tristeza e insatisfacción. Además, las mujeres mayores de 50 años han sido uno de los grupos que más ha consultado y pedido ayuda durante la pandemia (Cruz Roja Española). Los objetivos de este estudio han sido: conocer la actitud hacia el envejecimiento en mujeres mayores de 50 años, estudiar la relación entre la actitud hacia el envejecimiento, el funcionamiento ejecutivo, la depresión y la satisfacción con la vida. Los participantes han sido 139 mujeres mayores de 50 años. Los instrumentos utilizados han sido: Attitudes to Ageing Questionnaire (Laidlaw, et al., 2007), Satisfacción con la vida (Dienner, 1985), Funcionamiento prefrontal (ISP-20, Pedrero-Pérez, et al., 2015), y A Self-Report Depression (Radloff, 1977). Los datos fueron recogidos en noviembre de 2020 mediante un formulario on line. Se han obtenido correlaciones que indican que una actitud negativa hacia el envejecimiento se relaciona con menor satisfacción con la vida, mayor puntuación en depresión y peor funcionamiento ejecutivo. Se discuten las implicaciones de los resultados en la programación e inclusión de variables neuropsicológicas en los programas de atención a mujeres mayores en tiempos de crisis sanitarias.
Voluntariado y desarrollo generativo en jóvenes universitarios chilenos: un estudio exploratorio
Authors: Sandoval Obando Eduardo , Cabrera Iturra María Cristina , Catalán Paineñanco María Pía
Published: July 2022

La participación en actividades de voluntariado estaría relacionada con el desarrollo potencialmente generativo en sujetos que se encuentran viviendo la etapa de la adultez emergente, influyendo positivamente en su desarrollo a lo largo del ciclo vital. Objetivo: explorar biográficamente las pautas de comportamiento, las dinámicas relacionales, los motivos y los tipos de actividades de voluntariado que realizan los jóvenes universitarios pertenecientes a la carrera de Psicología en una Universidad Privada en el sur de Chile. Método: desde un enfoque interpretativo cualitativo, se adoptó un diseño descriptivo, exploratorio y transversal. Para la recolección e interpretación de los datos, se utilizaron las Entrevistas Semiestructuradas desde el enfoque Narrativo Generativo y el Análisis de Contenido. Resultados: las pautas de comportamiento de los jóvenes universitarios que participan en actividades de voluntariado demuestran flexibilidad, compromiso y perseverancia frente a los desafíos y tareas que enfrentan cotidianamente, permitiéndoles complementar positivamente su formación profesionalcon las tareas de cuidado y desarrollo de otros, destacándose la actitud positiva, apertura a la experiencia y proactividad. Asimismo, evidencian el despliegue de relaciones interpersonales positivas con sus pares, caracterizadas por la colaboración mutua, el apoyo, la empatía, la solidaridad y el respeto. Discusión: inferimos que el voluntariado y la generatividad son conceptos estrechamente vinculados que se complementan dialógicamente, posibilitándole a los jóvenes desplegar nuevos conocimientos y adquirir una visión crítica de la realidad, transformándose en una fuente de desarrollo que trasciende los intereses propios y va más allá de sólo querer ayudar, sino que de asegurar un legado que perdure en la sociedad y en las futuras generaciones.