bluuebunny/crossref_metadata_2025 huggingface dataset:
Plasticization of Alumina Toughened Zirconia Ceramics with the Silica Addition
Authors: Ovchinnikov P.N. , Efremova N.Yu. , Zhigacheva D.G. , Vasyukov V.M. , Rodaev V.V. , Dmitrievskiy A.A.
Published: March 2023

The purpose of this work is to study features of deformation at the room temperature by the method of uniaxial compression of alumina toughened zirconia ceramics (stabilized with calcium oxide) with different content of the silicon dioxide (CaO-ATZ+SiO2). It was found that SiO2 addition to the CaO-ATZ-ceramic ensured manifestation of the signs of plasticity at the room temperature, i.e., yield stage in the loading diagrams. The most pronounced plasticization was manifested at the silicon dioxide content of 4 mol. %. In this case, plastic deformation (calculated as the difference between deformations corresponding to the tensile strength and conditional yield strength) reached the 0.79 % value. In addition, introduction of the SiO2 additive (2 mol. % concentration) caused an increase in the ultimate compressive strength to the value of 2.66 GPa and ultimate strain to the value of 1.79 %. It was shown that exceeding the threshold value of the SiO2 concentration (by more than 4.5 mol. %) caused a sharp embrittlement of the CaO-ATZ+SiO2-ceramics. Discovered ceramics plasticity at the room temperature is explained by an increase in the tetragonal phase transformability of zirconium dioxide, which enhances the role of the transformation toughening mechanism. Plasticity margin of the composite ceramics based on the zirconium dioxide was achieved at the room temperature and provides a prospect for expanding the area of its practical applications
Iranian Intermediate ESP Students’ language learning beliefs and their language learning strategies
Authors: Najafi Seyedeh Khadijeh , Dehghani Ali Panah
Published: March 2023

The aim of the study is to examine the relationship between ESP students' language learning beliefs and strategy use. 68 Iranian female students studying in midwifery and nursing departments were selected. Study participants received the Quick Oxford placement, and 51 intermediate participants were selected from among them. Language Learning-Related Beliefs Inventory, and Language Learning Strategy-Inventory were used. Chi-square was used to find the relationship. The results showed that Iranian midwifery students are moderate in their beliefs about language learning, they generally use language learning strategies at a moderate level, and their preferences for language learning strategies are compensatory, metacognitive, memory, cognitive, social and affective. The results also showed that there is a positive relationship between ESP students' language learning beliefs and their use of language learning strategies. The findings of this study can also be fruitful for language learners and teachers, curriculum designers and material developers.
Keywords: ESP students, language learning beliefs, language learning strategies
Content analysis of blended learning about Russian language articles in Scopus
Authors: Uzunboylu Huseyin , Bolatovna Absalyamova Aida
Published: March 2023

It has been observed that there have been important developments in educational technologies in recent years/particularly, «COVIT - 19» has made these developments compulsory. The aim of this study is to analyze the published articles on blended learning in Russian language, scanned in Scopus, according to the content analysis. Content analysis model was used. In this context, 25 articles related to Blended learning in Russian language in the Scopus database were analyzed. The articles were read by the researchers one by one and analyzed by “classifying them by certain variables.” Analyzed data’ are explained by Tabulating. It has been concluded that articles on blended learning have increased in recent years. There has also been an increase in the number of articles and their authors in recent years.
Keywords: blended learning, modernization, online learning, content analysis’ education;
STEM-PjBL learning incorporates local knowledge to improve science literacy
Authors: Muskania Ricka Tesi , Maksum Arifin , Astra I Made
Published: March 2023

Integrating local knowledge into the STEM (science, technology, engineering, and mathematics) learning process through PjBL (project-based learning) can help learners develop themselves as a whole that is oriented toward adequate science literacy skills. The study aims to examine the effectiveness of STEM-PjBL learning using BAJARDI (digital IPA teaching materials) to improve the science literacy of learners. This is a quasi-experimental study with two groups of control experiments. Experimental classes use BAJARDI in the STEM-PjBL learning process, while control classes use conventional learning models. The research sample consisted of 120 students from a Class IV elementary school. The sample technique used is a random sampling. Scientific literacy test instruments are used to collect data. The validity of an instrument is determined by the Aiken index, while the reliability of the instrument is measured by the alpha Cronbach coefficient. Independent-Samples T The information is analyzed using test and quantitative descriptive statistics. This research identified a substantial difference in the average value of science literacy between the experimental and control groups (sig =. 00). The results of this research indicate that STEM-PjBL learning with BAJARDI is extremely effective in improving student science literacy.
Keywords: STEM, Project based learning, local knowledge, scientific literacy.
The Relation between Fear of Missing Out and Subjective Well-Being: The Mediating Role of Social Comparison and Loneliness.
Authors: ÇİFÇİ Süleyman , KUMCAĞIZ Hatice
Published: March 2023

The aim of this study was to examine the mediating role of social comparison and loneliness in the relationship between the fear of missing out (FoMO) and subjective well-being (SWB) in adolescents. 1000 adolescent individuals (505 female and 495 male) participated in this research. An online questionnaire was used to facilitate the participation of students. This questionnaire consisted of four tests, namely the Fear of Missing Out Scale, Adolescent Subjective Well-Being Scale, Social Comparison Scale and UCLA Loneliness Scale-Short Form and sociodemographic questions. Pearson product-moment correlation analysis and path analysis which is one of the structural equation model techniques were used for data analyses.

Correlation analysis’ results showed that there was a significant positive correlation between FoMO, SWB, social comparison and loneliness. Path analysis’ results showed that social comparison had a mediating role in the relationship between FoMO and SWB in adolescents. Path analysis’ results showed that loneliness also had a mediating role in the relationship between FoMO and SWB in adolescents.
Effect of Time, pH, and Yeast Concentration on Bioethanol Levels in the Ulva sp. Fermentation Process
Authors: Aina Christalia Rinastiti  , Dianita Ivana Permata  , Bekti Palupi  , Zuhriah Mumtazah  , Meta Fitri Rizkiana  , Atiqa Rahmawati
Published: March 2023

Bioethanol is a form of renewable energy that is used to reduce dependence on the use of fossil fuels which cause various negative impacts on the environment. Ulva sp. contains high carbohydrates so it has the potential as a raw material for bioethanol production. This study aims to determine the optimum conditions of the fermentation process with the variables used time, pH, and yeast concentration. This study used the results of hydrolysis of Ulva sp. with optimum operating conditions of 0.1 N HCl concentration, 80 mesh particle size, and 450 watt microwave power. Measurement of bioethanol levels was carried out using an alcoholmeter. The results showed that the optimal conditions for fermentation were 7 days of fermentation, pH 5.5, and yeast concentration of 1.5% which resulted in a bioethanol content of 7.55%.
Microwave Assisted Hydrolysis Ulva sp. Using HCl for the Production of Bioethanol Raw Materials
Authors: Bekti Palupi  , Nadia Ayumna Fa’iqoh  , Alifia Rahma Putri Neysella  , Boy Arief Fachri  , Ditta Kharisma Yolanda Putri  , Lukman Nulhakim  , Maulida Septiyana
Published: March 2023

The challenges faced by the Indonesian state are increasing greenhouse gases, climate change, and depleting fossil fuel reserves. This requires the exploration of alternative energy that is environmentally friendly and sustainable. Algae biomass, especially Ulva sp. is one of the resources that have the potential for bioethanol production as an alternative energy producer. The purpose of this study is to determine the potential of Ulva sp. as raw material for bioethanol and to determine the effect of particle size, solvent concentration, and power on the hydrolysis process. This study used Ulva sp. as raw material. hydrolyzed with HCl solvent using the microwave assisted hydrolysis method. Hydrolysis with HCl concentrations of 0.1 N, 1 N, 2 N, variations of microwave power 150 watts, 300 watts, 450 watts, and particle sizes of 60 mesh, 80 mesh, and 100 mesh. Measurement of reducing sugar levels was carried out using the dinitro salicylic acid (DNS) method. The results showed that the best conditions for hydrolysis were when the HCl concentration was 0.1 N, the microwave power was 450 watts, and the particle size was 80 mesh which resulted in a reducing sugar content of 20.751 mg/mL.
Nadzór Komisji Nadzoru Finansowego nad działalnością zarządzających alternatywnymi spółkami inwestycyjnymi
Authors: Balcarek Szymon
Published: March 2023

Celem artykułu jest przedstawienie zagadnienia nadzoru Komisji Nadzoru Finansowego nad działalnością zarządzających alternatywnymi spółkami inwestycyjnymi (ZASI). Nadzór sprawowany jest na podstawie kryterium legalności, a jego nadrzędnym celem jest zapewnienie prawidłowego funkcjonowania rynku kapitałowego. Autor dokonał klasyfikacji środków nadzoru, dzieląc je na środki nadzoru prewencyjnego oraz środki nadzoru bieżącego. Spośród środków nadzoru bieżącego wyróżnił informacyjne oraz represyjne środki nadzoru. Środki represyjne podzielił na środki ad rem oraz środki in personam. Zdaniem autora należy co do zasady w pierwszej kolejności stosować środki nadzoru możliwie najmniej dolegliwe, a dopiero gdy okażą się one nieskuteczne można skorzystać ze środków bardziej uciążliwych.
Zasady proceduralne udostępniania (przekazywania) informacji w celu ponownego ich wykorzystywani
Authors: Tomaszewska Katarzyna
Published: March 2023

Postępowanie o udostępnienie informacji sektora publicznego w celu ponownego jej wykorzystywania, mimo nawiązywania do regulacji dostępowych i oparcia się na uregulowaniach ustawy o dostępie do informacji publicznej, rządzi się własnymi regułami. Większość z nich została wyodrębniona przez ustawodawcę i określona jako wzorce postępowania. Znaczna część tych zasad wykazuje podobieństwo do zasad dostępowych (zasad z uregulowań u.d.i.p.). Nierzadko jednak jest ono pozorne, albowiem sprowadza się wyłącznie do zastosowania przez ustawodawcę identycznej nomenklatury. Sam zaś sposób uregulowania, zawartość merytoryczna, a w szczególności ich interpretacja dają odmienne rezultaty niż analiza uregulowań u.d.i.p, determinujących zasady postępowania. Niniejsze opracowanie poświęcone jest klasyfikowaniu i omówieniu proceduralnych zasad postępowania w sprawie udostępnienia informacji w celu ponownego wykorzystywania.
Sprzeciw wobec opinii albo orzeczenia lekarza — autonomia lekarza i autonomia pacjenta w procesie udzielania świadczeń zdrowotnych
Authors: Zoń Katarzyna Maria
Published: March 2023

Celem artykułu jest rozważenie prawa pacjenta do zgłoszenia sprzeciwu wobec opinii albo orzeczenia lekarza w kontekście autonomii lekarza i autonomii pacjenta w procesie udzielania świadczeń zdrowotnych. Skorzystanie z powyższego uprawnienia, które umożliwia weryfikację decyzji lekarza, wymaga spełnienia przesłanek przewidzianych w ustawie z dnia 6 listopada 2008 roku o prawach pacjenta i Rzeczniku Praw Pacjenta (tekst jedn. Dz.U. z 2022 r. poz. 1876 ze zm.). Z przeprowadzonej analizy wynika, że obecny kształt regulacji prawnej utrudnia pacjentom realne korzystanie z przyznanych im ustawowo uprawnień. Uproszczenie procedury wnoszenia sprzeciwu mogłoby przyczynić się do skuteczniejszej realizacji praw pacjentów, a tym samym zagwarantowania odpowiedniego poziomu ich ochrony.
Status funkcjonariuszy Straży Marszałkowskiej — zagadnienia wybrane
Authors: Mazurczak Eliza
Published: March 2023

Przedmiot opracowania stanowi charakterystyka wybranych elementów statusu funkcjonariuszy Straży Marszałkowskiej w aspekcie pozostawania przez nich w niepracowniczych stosunkach o charakterze administracyjnoprawnym. Skoncentrowano się na instytucji nawiązania tego rodzaju więzi prawnej, uprawnieniach i obowiązkach funkcjonariuszy tej formacji oraz na ustaniu ich zatrudnienia. Analiza regulacji pragmatycznych w tym zakresie stanowi dodatkowy argument uzasadniający stanowisko, zgodnie z którym Straż Marszałkowska może zostać zakwalifikowana do kategorii służby zmilitaryzowanej.
O okolicznościach wyłączających podleganie ubezpieczeniom społecznym obywateli państw obcych na tle poglądów judykatury (art. 5 ust. 2 ustawy o systemie ubezpieczeń społecznych)
Authors: Stopka Karolina
Published: March 2023

W opracowaniu dokonano analizy i oceny poglądów Sądu Najwyższego (SN) sformułowanych na tle art. 5 ust. 2 ustawy o systemie ubezpieczeń społecznych określającego, kiedy obywatele państw obcych wyłączeni są spod zakresu obowiązywania tej ustawy. Szerszej ocenie poddano stanowisko SN, zgodnie z którym przepis art. 5 ust. 2 ustawy systemowej wyłącza z podlegania polskim ubezpieczeniom społecznym dwie grupy obywateli państw obcych — po pierwsze: obcokrajowców, których pobyt na obszarze Rzeczypospolitej Polskiej (RP) nie ma charakteru stałego i po drugie: obywateli państw obcych, którzy są zatrudnieni w placówkach „dyplomatycznych” w nim wymienionych, a także pogląd, przypisujący użytemu w tym przepisie pojęciu pobyt o charakterze stałym swoiste, autonomiczne na gruncie ubezpieczeń społecznych znaczenie, determinowane sytuacją stanowiącą tytuł do ubezpieczenia społecznego, jak i stanowisko, wskazujące na potrzebę dynamicznej, operatywnej interpretacji zwrotu „nie ma charakteru stałego”. Oceny wskazanych wyżej poglądów SN dokonano z punktu widzenia znaczenia normatywnego przepisu art. 5 ust. 2 dla regulacji ustawy i oczekiwań co do brzmienia i wykładni przepisów wyznaczających zakres podmiotowy aktu normatywnego. Przy ocenie tych poglądów wzięto również pod uwagę wpływ zasady personalizmu na kształtowanie systemów zabezpieczenia społecznego, ewolucję regulacji prawnej ubezpieczeń społecznych w tym zakresie a także sposób rozstrzygnięcia o ubezpieczeniu społecznym w Konstytucji RP jak i istotę ochrony ubezpieczeniowej.
Data mining tools for complex socio-economic processes and systems
Authors: Obelets Tetyana
Published: March 2023

The paper considers discovering new and potentially useful information from large amounts of data that actualizes the role of developing data mining tools for complex socio-economic processes and systems based on the principles of the digital economy and their processing using network applications. The stages of data mining for complex socio-economic processes and systems were outlined. The algorithm of data mining was considered. It is determined that the previously used stages of data mining, which were limited to the model-building process, can be extended through the use of more powerful computer technology and the emergence of free access to large amounts of multidimensional data. The available stages of data mining for complex socio-economic processes and systems include the processes of facilitating data preparation, evaluation, and visualization of models, as well as in-depth learning. The data mining tools for complex socio-economic processes and systems in the context of technological progress and following the big data paradigm were identified. The data processing cycle has been investigated; this process consists of a series of steps starting with the input of raw data and ending with the output of useful information. The knowledge obtained at the data processing stage is the basis for creating models of complex socio-economic processes and systems. Two types of models (descriptive and predictive) that could be created in the data mining process were outlined. Algorithms for estimating and analyzing data for modeling complex socio-economic processes and systems in accordance with the pre-set task were determined. The efficiency of introducing neural networks and deep learning methods used in data mining was analyzed. It was determined that they would allow effective analysis and use of the existing large data sets for operational human resources management and strategic planning of complex socio-economic processes and systems.
Application of beam theory for the construction of twice differentiable closed contours based on discrete noisy points
Authors: Orynyak Igor , Koltsov Dmytro , Chertov Oleg , Mazuryk Roman
Published: March 2023

The smoothing of measured noisy positions of discrete points has considerable significance in various industries and computer graphic applications. The idea of work consists of the employment of the technique of beam with spring supports. The local coordinates systems are established for beam straight line segments, where the initial angles between them are accounted for in the conjugation equations, which provide the angular continuity. The notions of imaginary points are introduced, the purpose of which is to approach the real length of the smoothed contour to the length of the straight chord. Several examples of closed denoised curve reconstruction from an unstructured and highly noisy 2D point cloud are presented.
TOUR BUS CRASHES FROM THE PERSPECTIVE OF TOUR GUIDES
Authors: ARSLAN Aytug , AKKUS Gulsah
Published: March 2023

Purpose – This study aims to understand the causes of tour bus crashes (TBCs) and related injuries, which are considered in the context of work-related accidents (WRAs). Design/Methodology/Approach – Five categories were obtained under occupational safety and health (OSH) by adopting qualitative and quantitative methods. Content analyses were employed by MAXQDA, 2020 for both open-ended survey questions and focus group interviews. Findings – TBCs and resulting injuries substantially result from i) negligence and unintentional faults of tour guides, ii) physical faults of drivers such as fatigue and insomnia, iii) physical conditions such as the environment and roads, iv) cost-orientation by travel agencies and intensive tour programs v) structural reasons such as night travels. A significant relationship was determined between the physical faults of drivers and intensive tour programs of travel agencies. Therefore, it was determined that unsafe conditions have a much higher impact than expected on TBCs. Originality of the research – TBCs were studied in the context of OSH for the first time. The study unveils the reasons behind fatal and non-fatal injuries of the TBCs by focusing on unsafe behavior and unsafe conditions.
The Cornea and the Oxygen of the Atmosphere
Authors: Solis Herrera Arturo , Arias Paola E. Solís
Published: March 2023

The cornea is an avascular tissue which has attracted much attention by the uniqueness of its anatomical characteristics, it has, in proportion, an enormous size, in relation to the number of vessels, because on average few cells in the organism are away more than 30 microns of a blood vessel. However, the cornea, with a diameter of between 11 and 12 mm, is a unique example. It has been tried to explain the notable absence of blood vessels in the cornea, arguing that corneal tissues are able to take oxygen directly from the air. In this article we are explaining that based on the physicochemical characteristics of molecular oxygen and the cell membrane, cytoplasm, water, and cellular metabolism, it is not possible that epithelial corneal cells directly take oxygen from the air, instead, corneal cells have molecules that can dissociate the water molecules thereby these cells, like any other eukaryotic cells, take the oxygen from the intracell water, like plants.
Comparing the Effects of Differential and Visuo-Motor Training on Functional Performance, Biomechanical, and Psychological Factors in Athletes after ACL-Reconstruction: A Randomized Controlled Trial
Authors: Gholami Fatemeh , Letafatkar Amir , Moghaddas-Tabrizi Yousof , Gokeler Alli , Rossettini Giacomo , Ghanati Hadi Abbaszadeh , Schöllhorn Wolfgang Immanuel
Published: March 2023

Variable during practice is widely accepted to be advantageous for motor learning and therefor a valuable strategy to effectively reduce high-risk landing mechanics and prevent primary anterior cruciate ligament (ACL) injury. Few attempts have examined the specific effects of variable train-ing in athletes who have undergone ACL reconstruction. Thereby it is still unclear to what extent the variations in different sensor areas lead to different effects. Accordingly, we compared the effects of versatile movement variations (DL) with variations of movements with emphasis on disrupting visual information (VMT) in athletes who had undergone ACL reconstruction. For-ty-five interceptive sports athletes after ACL reconstruction were randomly allocated to a DL group (n= 15), VT group (n= 15) or control group (n= 15). The primary outcome was functional performance (Triple Hop Test). The secondary outcomes included dynamic balance (Star Excur-sion Balance Test (SEBT)), biomechanics during single-leg drop-landing task hip flexion (HF), knee flexion (KF), ankle dorsiflexion (AD), knee valgus (KV), and vertical ground reaction force (VGRF), and kinesiophobia (Tampa Scale of Kinesiophobia (TSK)) assessed before and after the 8-weeks of interventions. Data were analyzed be means of 3×2 repeated measures ANOVA fol-lowed by post hoc comparison (Bonferroni) at the significance level of p≤0.05. Significant group × time interaction effects, main effect of time and main effect of group were found for triple hop test, all eight directions of SEBT, HF, KF, AD, KV, VGRF and TSK. There was no significant main ef-fect of group in HF and triple hop test. Also, significant differences in triple hop test, seven direc-tions of SEBT, HF, KF, KV, VGRF and TSK were found between control group with the DL and VMT groups. Between group differences in AD and medial direction of SEBT were not signifi-cant. Also, there was no significant differences between VMT and control groups in triple hop test and HF variables. Both motor learning (DL and VMT) programs improved outcomes in patients after ACL reconstruction. Findings suggest that DL and VMT training programs lead to compa-rable improvements in rehabilitation.
ANALYSIS OF SUITABILITY LAND FOR FLOOD-FREE SETTLEMENT IN BAOLAN DISTRICT TOLITOLI REGENCY
Authors: Ferdi Ferdi , Saputra Iwan Alim , Rahmawati Rahmawati , Budianta Aziz
Published: March 2023

Baolan District, Tolitoli Regency, as a urban area is quite worrying, because it is often hit by floods. The settlement area is an area that is often affected, because the settlement area of Baolan District is in the vulnerable to very vulnerable class. This research was conducted in Baolan District from April to August 2021. The tools and materials used in this study were: a laptop, ArcGis 10.4 software, and secondary data (rainfall data, DEM data or Digital Elevation Model, soil type maps, and maps). RBI scale 1:50000). This type of research is quantitative descriptive with a spatial approach and using saturated sampling rules obtained from the entire population. The purpose of this study was to determine the distribution and level of suitability of land designated for flood-free settlements in Baolan District. The results of the analysis show that the suitability class that has the largest distribution area is the QS class (Quite Suitable) with an area of 31570.148 or 79.97%. Class S (Suitable) is the class with the smallest area of distribution, which is 538.892 or 1.37%, while the other class is class that is not suitable (N) with an area of 7368.287 or 18.66%. Class S (Suitable) indicates that the class is very wide good if it is developed for a useful area and inversely proportional to class N (Not Suitable). While QS (Quite suitable) is a class that is good enough to be developed into a useful area, but there are several things to consider. the condition of the area is quite steep and the topography is high, as a result it will cause natural hazards such as erosion and land slides. Another thing to consider is the area that covers the rain catchment area which should be predominantly functioned as a buffer zone.

 
PERCEPTION OF THE ONLINE LEARNING PROCESS OF SEBELAS MARET UNIVERSITY STUDENTS IN THE COVID-19 PANDEMIC ERA
Authors: Ronggowulan Lintang , Subarno Anton , Sutarno Sutarno , Lelono Sarjoko , Saputro Hikari Dwi , Kartika Fitria Dewi
Published: March 2023

The impact of pandemic Covid-19 is requires all of humanity to carry out social distancing and maintain a distance. As a result of these restrictions, many sectors are affected. One of the most significantly affected sectors is the education sector. In the learning process in the education sector distance learning is applied with the Online system.This distance learning system has also been implemented at Sebelas Maret University Surakarta (UNS) since March 2020. This study aims to determine the perception of the online learning process of UNS students. The method used in this research is a qualitative descriptive method using purposive sampling (active students who take part in learning at UNS). As for the results of this study, it can be seen that from a total of 13 questions in the online learning perception instrument, 62% of the total questions stated that students had difficulties in online learning and there were 38% of the total questions regarding the ease of online learning. So it can be said that the respondents found it difficult and experienced problems in carrying out online learning at UNS like difficult for me to understand the concept and didn’t have good internet access.
ANALYSIS OF MATERIAL LOSS DUE TO FLOOD DISASTER IN THE SUB-DISTRICT OF SILAT HULU, KAPUAS HULU REGENCY
Authors: Nurfitri Holifah , Rintia Florensia , Francista Francista , Rianingsih Ayu , Ramdhania Nurul , Purwanto Ajun , Andrasmoro Dony , Eviliyanto Eviliyanto
Published: March 2023

A flood is a frequent disaster during the rainy season and causes many losses, good materials, treasure objects, and casualties. The study aims to know the loss of materials caused by disasters that flood Bandang in the Silat Hulu Sub-district. The method of research used is descriptive quantitative. Collected data is secondary data, including damaged buildings, facilities and infrastructure, and land. The method analysis used is descriptive. The study results show that The Silat Hulu Sub-district experienced twice the floods successively. The first occurred on 18-19 October 2021 and 22-23 October 2021. A total of 11 villages of 14 villages experience a flood. Consequently, the flood and loss of materials, including dozens of house inhabitants of Village Selangkai and Entebi, were damaged, collapsed, and swept away. A total of 1,813 families were evacuated, and the total loss consequence flood around Rp. 20,000,000.00-30,000,000.00.
STUDI EKSPERIMENTAL PENGARUH JUMLAH SUDU DAN PENGGUNAAN END PLATE TERHADAP CUT IN SPEED TURBIN ANGIN SAVONIUS HELIKS
Authors: Prasetya Hermawan Yudha , Wijayanto Danar Susilo , Saputra Taufik Wisnu
Published: March 2023

This study aims to analyze the effect of variations in the number of blades and the use of end plates on the cut in speed of Helical Savonius wind turbine. The method used in this research is the experimental method. The variables used in this study are variations in wind speed from 1 to 5 m/s with intervals of 0.5 m/s. Variations in the number of blades are 2,3, and 4 blades. Variations in the use of end plates and without end plates. The results of this study was found that variations in the number of blades and the use of end plates affect the cut in speed of helical Savonius wind turbine. The fewer the number of turbine blades, the better the turbine's cut in speed will be. 2 blade’s Helical Savonius wind turbine with end plate is turbine variation that is able to produce best cut in speed of 1.97 m/s, compared to other variations.
INVESTIGASI EKSPERIMENTAL PEMANAS AIR TENAGA SURYA SISTEM TRICKLE BERBAHAN POLIKARBONAT VARIASI LAJU ALIRAN 2 LPM
Authors: Putri Alisya Eka , Pambudi Nugroho Agung , Bugis Husin
Published: March 2023

Solar energy is one of the most impactful renewable energy sources and has great potential compared to other energy sources. The use of solar energy can be maximized by using solar panel technology and solar collectors. One example is a solar water heater. Polycarbonate is a good material to be applied to solar water heaters because it has good mechanical properties and is corrosion resistant. This study aims to analyze the performance of a polycarbonate solar water heater with a trickle system using a flow rate of 2 l/m. This type of research is quantitative with experimental research methods. This research was conducted by flowing water through a solar water heater and taking data from 08.00-15.00 with 3 repetitions to obtain accurate results. Data were collected by recording the temperature at the inlet, outlet, collector, top collector, environment, intensity of solar radiation, and wind speed. The data obtained were analyzed to find collector efficiency, fluid efficiency and total efficiency. Based on the research results, this solar water heater is capable of producing water temperatures up to 40.5°C with temperature changes of up to 7.2°C. This solar water heater is able to produce a collector efficiency of up to 52%, and a total efficiency of 37%.
PENGARUH PELAYANAN TERHADAP KEPUASAN KONSUMEN DI BENGKEL RASWO SOLO BARU
Authors: Iswanto Andrian , Pratama Topik , Perdana Krisna Adhi , Vernanda Ayu , Imania Khofifah
Published: March 2023

In order to improve the quality of service at Raswo's workshop, this study aims to determine customer satisfaction at Raswo's Solo Baru Workshop. Research is reviewed from the quality of service and services provided. This research was also conducted to identify other factors that influence the decline in customer satisfaction at Bengkel Raswo Solo Baru. To measure customer satisfaction, explanatory research or often called causal research is used. The population of this study were all customers of Raswo Solo Baru Workshop with a sample size of 30 customers with 24 questions on each questionnaire sheet. Based on the data results, it can be seen that service and service have a positive effect on customer satisfaction. This is indicated by the weighted Average Value (NRR) of 3.8567 from the range (1.00-4.00) and the value of the Community Satisfaction Index (IKM) resulting in a score of 96.418 from the range (25.00-100.00).
Memorias del X Congreso Nacional de Alconpat México 2022
Authors:   Cinvestav Unidad Mérida, Castro Borges Pedro , Aloso Guzmán Elia Mercedes ,   Universidad Michoacana, Pérez López Tezozomoc ,   Universidad de Campeche
Published: March 2023

Alconpat México fue creada en abril del año 2002. Fue la primera delegación de Alconpat Internacional. Desde aquella época, y en cada año par, se ha llevado a cabo el Congreso Nacional de Alconpat México, que de cariño es llamado el Pre-Conpat. Desde aquel entonces, numerosas delegaciones nacionales se han creado año con año. En esta ocasión el comité organizador quizo hacer una celebración académica por los primeros 20 años. Esto implicó darle al congreso una imagen mística que incluye la presentación de una obra alusiva del famoso pintor Guido Farina y que engalana este libro de memorias. La obra consiste en una mano que evoca el mando de las diferentes directivas bajo la tutela del consejo fundador ilustrado con los nombres de las personas de éste en la forma de un halo. La mano sostiene una brújula que indica el camino de nuestra asociación, donde se encuentra el logo de Alconpat México y un Katun maya que representa el número 20, alusivo al 20 aniversario. Estamos muy contentos de compartir contigo ésta celebración académica.
Распространение вариантов вируса SARS-COV-2, вызывающих интерес (VOI) и субвариантов Omicron, находящихся под наблюдением (VUM), на основе количества их геномов, депонированных в базу данных GISAID за неделю с 11.03.2023 г. по 17.03.2023 г.
Authors: Дмитриева Людмила , Краснов Ярослав , Чумачкова Елена , Осина Наталья , Зимирова Анастасия , Иванова Александра , Карнаухов Игорь , Караваева Татьяна , Щербакова Светлана , Кутырев Владимир
Published: March 2023

В обзоре представлена информация по циркулирующим в настоящее время вариантам вируса SARS-COV-2 вызывающих интерес (VOI) и субвариантов Omicron, находящихся под наблюдением (VUM), геномные последовательности которых размещены в международной базе данных GISAID за неделю с 11 по 17 марта 2023 г.
Experimental Investigation on the Performance of Polymer-Coated Clay/Polyacrylamide Hydrogel for Water Shutoff Treatment
Authors: Roslan A. A. , Aziz N. A. A. , Dzulkarnain I. , Tewari R. D. , Jaafar M. Z.
Published: March 2023

Polymer gel system has been identified as having the potential for blocking and diverting water flow. However, the current polymer reported an inability to maintain its mechanical strength, limited penetration depth, and instability in reservoir conditions of high temperature and high pressure. A distinctive bentonite nanomer clay (PGV)/acrylamide (AM)-co-2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) preformed particle gel with poly(ethylene glycol-b-tetramethylene oxide) (PEGTMO) coating to control the swelling kinetics is formulated. The in-house formulated gel’s ability to block and divert water flow in a porous medium is studied. The formation recipe of the gel was achieved by numerous swelling tests as induced by brine solution under reservoir conditions. Through the swelling tests, the long-term thermal stability of the gel solution was demonstrated. The incorporation of PGV clay particles improves the swelling and mechanical properties of the gel. Premature swelling can be avoided with PEGTMO coating as it slows the swelling rate over a 10-minute period, which gives the advantage of controlling the swelling before reaching the intended site of action during coreflood experiments. The rheological behavior of the hydrogel features rubber-like mechanical behavior with a viscosity value of 1.17 cp, which displayed water-like characteristics. Further, significant permeability reduction of large fractures is demonstrated by the coreflooding experiment with a calculated result of 96.2%. This formulated gel could offer the solution as a blocking agent in void space channels containing reservoirs that leads to a reduction of water cut due to thief zones.
An optimized protocol to detect high-throughput DNA methylation from custom targeted sequences
Authors: Iannuccelli Nathalie , Serre Rémy-Félix , Vandecasteele Céline , Lee Alonzo , Merlet Yann , Donnadieu Cécile , Demars Julie
Published: March 2023

The protocol describes a targeted methylation library preparation upstream short read sequencing with an Illumina instrument. The protocol includes the New England Biolabs Next Enzymatic Methyl-seq Library Preparation workflow combined with the Twist Bioscience Targeted Methylation Sequencing workflow. The protocol is divided into 8 steps: fragmentation, library preparation, enzymatic conversion, indexing, pooling, hybridization, capture and amplification. Main advantages are (i) the limitation of DNA degradation using enzymatic conversion, (ii) both the specificity and efficiency of the capture especially in CpG highly rich regions although this step is the critical step due to the temperature control, and (iii) the pooling of samples into 8-plex reducing handling time and experimental costs. However, the workflow takes three working days with several break points. This protocol can be performed in standard molecular biology laboratories and it’s suitable for 96 samples. This approach can be adapted to any interesting regions using a custom panel for agronomic species and model organisms but also in human as a diagnostic tool.
Multi-objective optimization of Electric Vehicle Routing Problem using Bat Algorithm
Authors: Vani Veena , D Kishan , Ahmad Waseem , REDDY B NARESH KUMAR
Published: March 2023

The authors have requested that this preprint be removed from Research Square.
Optimal Relay Selection Strategy for Efficient and Reliable Cluster based Cooperative Multi Hop Transmission in Vehicular Communication
Authors: potula sravani , Ijjada Srinivasa Rao
Published: March 2023

Routing is the key issue for Vehicular Networks since each node in the network has mobility. Dynamic nature of vehicular networks increases with the mobility and the consequence is reflected over control traffic overhead. As a result, the routing technique and the type of node mobility information are completely dependent on building dependable end-to-end communication links. To address these challenges, a Reliable Cluster based Multi Hop Cooperative Routing (RCCR) strategy was proposed by using velocity, distance and link quality parameters. This algorithm obtains the tradeoff between Quality of Service (QoS) and mobility constraints over link parameters. It improves routing scalability by electing cluster-heads and selecting Multi-Point Relays (MPRs) while considering mobility constraints and QoS needs. The proposed technique determines the link quality for every pair of nodes based on values of signal strength and distance parameters. The relay vehicles are chosen based on the highest possible QoS value, which is calculated to assure route stability, reliability, and durability. The heuristic limitations of the multi-point relay selection strategy are handled by considering the link quality, distance from source vehicle, and cluster-head coverage area to enhance the Packet Delivery Ratio (PDR) of multi-hop network with tolerable End-to-End transmission delay. Further, we optimize and obtained optimal number of cooperative vehicles in every hop with the objective to minimize the end-to-end energy consumption. Finally, simulation results demonstrate the effectiveness of proposed algorithm compared to other state of art algorithms.
A Compact Microstrip Patch Antenna for X-Band
Authors: Borel Touko Tcheutou Stephane , Priyadarshini Rashmi
Published: March 2023

Nowadays, microstrip antennas are widely used in wireless applications. We have so many bands of frequency and we can list out L, S, X, Ka etc. For this work, we will be focusing on X bands only. The range of frequency of X bands is from 8 to 12 GHz. Design and simulate a compact microstrip patch antenna for X band applications are our main goals for this topic so that we will find out good results of antenna. The software used in this paper is HFSS 15 (High Frequency Structure Simulator 15). The proposed antenna is a rectangular microstrip patch with the dimensions of 6mm x 5mm using as substrate material FR4, dielectric constant 4.4 and operating frequency 11 GHz. After simulation, we got a gain equal to 2.8 dB, bandwidth equals to 700 MHz, directivity equals to 3.96 dB, VSWR (Voltage Standing Wave Ratio) equals to 1.24. These results show that antenna is very suitable for X bands applications (satellite communication, wireless computer networks, etc.)
Optimal Control of Computer virus Spreading model with partial immunization
Authors: Muthukumar Sumathi , Muthukrishnan Senthilkumar Senthil , Chinnadurai Veeramani
Published: March 2023

Nowadays, viruses and worms create the most critical problems in computer security issues. Hence, the spreading behavior of computer viruses and the investigation of their control measures are crucial since they will prevent massive economic losses and social panic. This study explores computer virus transmission with a partial immunization based on the Susceptible - Infected - Susceptible - Recovered - Susceptible (SISRS) model. Also, the virus spreading process is analyzed using the reproduction number R_0and stability analysis. The developed model is justified through stochastic simulations and compared with the existing SIRS model. Furthermore, the optimal control measures are found analytically and numerically. Numerically substantiated that the spread of infected nodes and the immunity loss can efficiently be managed when using an optimal control technique.
Clustering-based Energy-Efficient Resource Allocation in Cognitive Radio Based Smart Grid
Authors: Anbuselvi Cynthia , G Ananthi , T Aruna
Published: March 2023

Cognitive Radio (CR) has been recognized as one of the intellectual solutions for Smart Grid environment to transmit high volume data over various environments and distribute the electricity to the customers. The inspiration of this work is to reduce the interference and allocate channels efficiently that improves the and utilization fairness of the Smart Grid (SG) network through a clustering-based EnergyEfficient Power Allocation algorithm among Secondary Users. Mathematical equations have been developed for the performance parameters such as channel reward, user reward, Jain’s fairness index, throughput and power calculation which has been simulated using MATLAB R2020b.
Breaking Two Provably-Secure Certificateless Signcryption Schemes for Internet of Things
Authors: Du Hongzhen , Ma Shaoyi , Wen Qiaoyan , Zhang Shanshan
Published: March 2023

Recently, Gong et al. put forward a certificateless signcryption (CLSC) scheme suitable for Internet of things. The authors demonstrated that their scheme is confidential, unforgeable and forward secure, and it meets known session-specific temporary information security under the attacks of two Types of adversaries. More recently, Xu et al. constructed a CLSC mechanism suitable for edge computing on the basis of blockchain, and proved that their mechanism satisfies unforgeability and confidentiality. In this article, we first demonstrate Gong et al.’s scheme can be totally broken: every user can calculate the master secret key from the partial private key sent by Key Generation Center. Moreover, we prove that Gong et al.’s scheme is not confidential, unforgeable and forward secure, and it cannot enjoy known session-specific temporary information security, either. Next, we declare that Xu et al.'s mechanism is able to be universally forged by anyone, that is, everyone can forge valid signcryption ciphertexts of a sender on any message without knowing the sender’s secret information. Furthermore, Xu et al.’s mechanism is not CCA2 secure against two Types of adversaries.
A Gain Embedded V-Integrated Rectangular Slotted Triangular Edged (EVI-STE) Design for Wireless 5G Mobile Applications
Authors: N porchelvi , S Titus
Published: March 2023

This paper presents a new nonlinear ground fractal antenna design, named as, Embedded V-Integrated Rectangular Slotted Triangle Edged (EVI-STE) antenna for wireless communications. In this proposed design slots of different shapes have been loaded to optimize the characteristics of an antenna such as return loss, impedance matching, gain and radiation pattern. The proposed antenna is employed with defected ground to reduce the return loss and the antenna is fed by microstrip line. The peak gain is 3dB with VSWR < 2 which shows that there is good impedance matching throughout the circuit. Antennas are designed on low-cost FR-4 glass epoxy substrate with relative permittivity of 4.4 and overall dimension 21×25mm2 Comparison among antennas have been made and found that the proposed antenna exhibit better results in the fourth iteration in terms of bandwidth, impedance matching, number of frequency bands, and gain. The antenna is designed and simulated using HFSS and obtained good output response at 3.8, 5.6, 8.2 GHz which makes it suitable for 5G applications.
Adoption of Service-Oriented Architecture for Biophilic Service Provisioning Processes:Limitations and Possibilities
Authors: Daneshgar Farhad , Foroughi Rahim , Abedin Babak , Mehr Nava Tavakoli , Youhangifard Atefa
Published: March 2023

Many governments have recently shown strong interest in providing more green spaces for the benefit of their citizens. These benefits include recreational enjoyment, health and wellbeing, and biophilic assets/economy. This study analyses the nature of biophilic services as a pre-cursor for identifying high-level requirements of an ICT application for managing biophilic service-provisioning processes in biophilic cities. To achieve the above goal the study adopts a functionalist research paradigm that views biophilic services as part of the biophilic city the latter being a complex network of ecosystems that together promote and sustain solidarity, stability, and sustainability. With its macro-level orientation, the functionalist approach focuses on the needs of its citizens.
Child and Adult Faces: Facial Mimicry and Emotion Perception Are Influenced by the Interaction of Target Age and Face Masks
Authors: Kastendieck Till , Dippel Nele , Asbrand Julia , Hess Ursula
Published: March 2023

Emotional mimicry, the imitation of others’ emotion expressions, is related to both interpersonal closeness and better perceived interaction quality. Yet, little research has focused on the effect of face masks on emotional mimicry and none on masked child faces. To address this gap, we conducted an online experiment (N=235, German sample, adult perceivers). Masks reduced emotion recognition accuracy for all expressions, except in the case of anger in masked child faces, where perceived anger was even increased. Perceived interpersonal closeness was reduced for masked happy and sad faces. For both child and adult expressers, masks reduced facial mimicry of happy expressions, with no mask effects for sadness and anger expression. A stronger mask effect on facial happiness mimicry of child faces was mediated by the degree to which recognition accuracy of these faces. Smiles shown by masked children were not recognized well, likely due to the absence of wrinkles around the eyes in child faces. Independent of masks, sadness shown by children was mimicked even more strongly than when shown by adults. These results provide evidence for facial mimicry of child expressions by adult perceivers and show that the effects of face masks on emotion communication may vary when children wear them.
Oxymatrine mediated prevention of amyloid β-peptide induced apoptosis on Alzheimer's model PC12 cells an in vitro cell culture studies and in vivo cognitive assessment in rats
Authors: Wang Zhuo , Gao Chao , Zhang Lei , Sui Rubo
Published: March 2023

Alzheimer’s disease (AD) is a major neurological disease affecting elder people worldwide. Existing drugs only reduce the symptoms of the disease. Commonly, Aβ25–35 peptide aggregation is the main reason for AD development. Recently, the discovery of multiple protein-targeting molecules is a new strategy for AD treatment. This study demonstrates the neuroprotective potential of oxymatrine against multiple mechanisms like acetylcholinesterase, mitochondrial damage, and β-amyloid induced cell toxicity. The in vitro cell culture studies showed that oxymatrine possesses significant potential in the inhibition of the Acetylcholine esterase enzyme. Treatment of oxymatrine enhanced the antioxidant, antiapoptotic, and Aβ25–35 peptide aggregation prevention mechanism in PC12 cells. Furthermore, oxymatrine has the competence to protect the PC12 cells against Aβ25–35 induced cytotoxicity and down-regulates the ROS generation. The in vivo acute toxicological studies confirmed that the oxymatrine did not induce any organ damage or death in test animal groups. Overall, the study evidenced that, oxymatrine as an efficient neuroprotective agent, might be a multifunctional drug for Alzheimer’s disease treatment. We believed that this is a reliable and synergistic approach to Alzheimer’s treatment strategy.