bluuebunny/crossref_metadata_2025 huggingface dataset:
The Impact of IoT on The Storing Process of Leather Raw Material
Authors: Antonius Franciskus , Saepudin Asep
Published: June 2023

A critical step in processing leather raw material is the storing that keeps them in good condition and not easily damaged through the right temperature and humidity level, as otherwise the quality of leather raw material would not be consistent and its economic value would be low. This particular study, therefore, is to conduct an experiment that uses the Internet of Things (IoT) which allows proactive monitoring in keeping a specific temperature and humidity level in their storing process. Hence the subsequent leather processing can be done at the optimal level. The experimentation showed positive results as the use of IoT made storing process of leather raw materials became more proactive and run three times more effective, from just 8 hours to 24 hours, and also brought about a positive effect on the economic efficiency and effectiveness as it enable users to produce more consistent quality of leather raw material whilst the total operating costs remained and even lower. Besides its economic impact, IoT has increased the workers' and their relatives' welfare and social life driven by better income and less time consuming. It also brings about some positive environmental effects as it reduced carbon emissions by keeping energy waste at a lower level.
Implementation of Self-Organizing Map (SOM) Algorithm for Image Classification of Medicinal Weeds
Authors: Mayatopani Hendra , Handayani Nurdiana , Septarini Ri Sabti , Nuraini Rini , Heriyani Nofitri
Published: June 2023

Wild plants or weeds often become enemies or disturb the main cultivated plants. In its development, wild plants or weeds actually have ingredients that are beneficial to the body and can be used as medicine. However, many people still need knowledge about the types of weed plants that have medicinal properties, especially the leaves. The purpose of this research is to classify the image of weed leaves with medicinal properties based on color and texture characteristics with an artificial neural network using a Self-Organizing Map (SOM). To improve information in feature extraction, RGB and HSV color features are used as well as texture features with Gray Level Co-occurrence Matrix (GLCM). Furthermore, the results of feature extraction will be identified as groups or classes with the Self-Organizing Map (SOM) algorithm which divides the input pattern into several groups so that the network output is in the form of a group that is most similar to the input provided. The test produces a precision value of 91.11%, a recall value of 88.17% and an accuracy value of 89.44%. The results of the accuracy of the SOM model for image classification on medicinal weed leaves are in the good category.
Development of a Reflective Learning Program in Online Tutorials for the Biology Education Department
Authors: Sekarwinahyu Mestika , Sapriati Amalia , Rahayu Ucu
Published: June 2023

This study aims to produce a reflective learning program that can be applied to the online tutorial in the Biology Education Department which can improve the reflective thinking skills of Biology Education students. The study was conducted in three years with using the research and development (R & D) which adapts the 4 D model from Thiagarajan et al. The research steps carried out preliminary studies, program design, program development -which includes program trials and program revisions-, and program implementation. What will be discussed in this paper is limited to how the program development process goes from the start until the right prototype is obtained to help students hone their reflective thinking skills. Reflective learning programs in online tutorials require several stages to arrive at the most appropriate prototype that is able to increase student participation in reflection which has the potential to increase reflective thinking skills. After going through several stages of testing and revising the placement of the most appropriate reflection activities, reflection activities are given every two sessions, namely in the second, fourth and sixth sessions
Study of Biomass in Two Mangrove Ecosystems
Authors: Rumanta Maman , Aji Sandra Sukmaning , Kunda Rony Marsyal , Selano Frenly Marvi , Rahayu Ucu
Published: June 2023

This study aims to determine the storage of biomass in the mangrove ecosystem of Jakarta Bay compared to Ambon Bay. This research used descriptive quantitative method. Sampling technique using the Point Center Quarter Method (PCQM) which was measured around the chest height of mangrove trees (DBH). Data analysis was performed using an allometric equation where each mangrove plant has a specific gravity. The results of this study indicated that the composition of mangrove species in Ambon Bay consists of 6 mangrove species, namely: Bruguiera cylindrica (L.) Bl, Rhizophora apiculata Bl, Sonneratia alba Smith, Aegiceras corniculatum (L.) Blanco, Avicennia officinalis L, Ceriops tagal. In the ecosystem, Rhizophora apiculata Bl and Sonneratia alba Smith had higher biomass values compared to the other four species. Meanwhile, in Jakarta Bay, the composition of mangrove plants is dominated by Sonneratia alba Smith. The subsurface biomass in the Jakarta Bay and Ambon region is lower than the aboveground biomass.
LUDICIDADE E IDENTIDADE ÉTNICO-RACIAL NAS BRINQUEDOTECAS: UMA ANÁLISE DA PRODUÇÃO CIENTÍFICA A PARTIR DAS MATRIZES EPISTEMOLÓGICAS
Authors: Loiola Karen Setenta , Pinto Nayla Júlia Silva , Silva Renan Mota
Published: June 2023

A brinquedoteca representa um contexto imprescindível no vir-a-ser da criança, cujas dinâmicas relacionais ali circunscritas se mostram essenciais para a compreensão de diversos fenômenos que atravess
Análise sobre as mudanças e tendências de gerenciamento de projetos aplicados às paradas de manutenção
Authors:   , Brandão Amanda
Published: June 2023

A tecnologia, característica da Era da Informação, trouxe mudanças significativas na sociedade e organizações, aceleradas pela pandemia. Isso levou a uma transformação digital que afetou a gestão de projetos, incluindo os de manutenção. O presente trabalho utiliza uma metodologia exploratória e pesquisa bibliográfica e documental para analisar as mudanças na gestão de paradas de manutenção. A ciência do gerenciamento de projetos surgiu na década de 60 e se desenvolveu com novas ferramentas e institucionalização da profissão de gerente de projetos, o que permite com que avanços na gestão de projetos ocorram mesmo em ambientes de cultura estabelecida como é o caso da indústria.
Representasi Idiologi Berita Kekerasan Seksual Dalam Postingan Akun Instagram Kalis Mardiasih
Authors: M Muhana Nurkhalishah , Fakihuddin Lalu , Muttaqin Zainul , Masud Lalu
Published: June 2023

Penelitian ini bertujuan untuk mengungkap representasi idiologi Kalis Mardiasih dalam berita kekerasan seksual dan melihat wacana seksualitas dicanangkan. Data yang digunakan dalam penelitian ini yaitu 18 postingan berita kekerasan seksual dengan metode deskriptif kualitatif. Menggunakan analisis wacana Sara Mills untuk mengungkap posisi subjek-objek dan posisi pembaca. Hasil yang diperoleh dari kajian ini menunjukan bahwa mayoritas subjek pada berita dipengaruhi oleh pihak laki-laki selaku pelaku dan pihak kepolisian, sedangkan perempuan korban kekerasan dijadikan objek dalam berita, baik perempuan dewasa maupun anak-anak. Dalam representasi idiologi berita kekerasan seksual, Kalis Mardiasih menggunakan perspektif perempuan yang menjadikan pembaca melihat dari sudut pandang korban, dari kekhawatiran, rasa cemas, bahkan tekanan psikologis.Representasi, kekerasan seksual, wacana Sara Mills, Instagram.
Implementasi Pembelajaran Inklusi: Studi Kasus di SDN 1 Kuta
Authors: Rizal Lalu , Nursaly Baiq Rismarini , Padlurrohman Padlurrohman
Published: June 2023

Penelitian ini bertujuan untuk mengetahui penerapan pembelajaran model inklusi di SDN 1 Kuta dan dan kasus yang muncul dalam penerapan pembelajaran model inklusi.  Jenis penelitian ini adalah Penelitian Kualitatif dengan metode studi kasus. Populasi dalam penelitian ini adalah siswa SDN 1 Kuta yang dikategorikan berkebutuhan khusus. Jumlah sampel dalam penelitian ini adalah 12 orang siswa yang diketahui sebagai ABK (Anak Berkebutuhan Khusus) melalui metode assesmen ABK. Data tentang anak berkebutuhan khusus diperoleh dari hasil asesmen anak berkebutuhan khusus yang dilakukan oleh guru guru di SDN 1 Kuta, dari orang tua siswa, guru, dan telaah dokumen pendukung pelaksanaan pembelajaran model Inklusi Di SDN 1 Kuta. Analisis data menggunakan metode reduksi. Setelah melaksanakan analisis data, diperoleh hasil : 1) Ditemukan anak berkebutuhan khusus di SDN 1 Kuta dan sebagian besar anak dalam kategori Kesulitan Fungsional khusus;  2) dukungan dan perhatian orang tua anak berkebutuhan khusus sangat kurang untuk membimbing anaknya belajar di rumah; 3) Guru belum maksimal dalam mengelola pembelajaran model inklusi; dan 4) Sarana pendukung pembelajaran model inklusi masih sangat kurang. Penerapan pembelajaran model inklusi di SDN 1 Kuta sudah dilaksanakan dari tahun 2019 namun masih ada masalah yang harus dibenahi dalam rangka lancarnya pelaksanaan pembelajaran model inklusiKata Kunci: Pembelajaran Inklusi, Anak Berkebutuhan Khusus, SDN 1 Kuta
Peristiwa Alih Kode dan Campur Kode di Kolom Komentar Video “Nostalgia Hal-Hal Gila” Youtube Rahmet Ababil Serta Relevansinya Terhadap Pembelajaran Bahasa Indonesia
Authors: Purwanto Mahendra Azis
Published: June 2023

Artikel ini mengkaji campur kode dan alih kode yang terdapat pada kolom komentar Youtube Channel Rahmet Ababil tentang kisah kenakalan anak STM. Penelitian ini berfokus pada bentuk, faktor, dan jenis campur kode yang terdapat di kolom komentar channel Youtube Rahmet Ababil. Pengumpulan data dilakukan dengan menggunakan metode mendengarkan dengan memanfaatkan teknik percakapan terbuka, screen recording, dan note-taking, dan analisis data meliputi teknik penentuan elemen sorting (PUP), menulis perbedaan urutan, dan menyusun elemen. . Hasil penelitian di kolom komentar beberapa bentuk campur kode Youtube Channel Rahmet Ababil: (1) Campur Kode yang berwujud frasa, (2) Campur Kode yang berwujud klausa, (3) Campur Kode yang berwujud kata, (4) Campur Kode yang berwujud pengulangan kata. Faktor yang melatarbelakangi terjadinya campur kode yaitu: keterbatasan kode, penggunaan istilah yang lebih populer, pembicara dan mitra pembicara serta pribadi pembicara, tempat tinggal dan waktu pembicara berlangsung, modus, fungsi, dan tujuan ragam dan tutur bahasa, hadirnya pihak ketiga, pokok pembicaraan untuk membangkitkan rasa humor, dan untuk sekedar bergengsi. Hubungannya dalam pembelajaran yakni seorang guru atau pendidik sering kali menggunakan proses alih kode dan campur kode yang bertujuan agar para siswa atau peserta didik lebih mudah menangkap apa yang hendak pendidik atau guru utarakan dalam proses pembelajaran mengenai materi yang hendak disampaikan.Kata kunci: Alih Kode dan Campur Kode, Komentar Youtube, Pembelajaran Bahasa Indonesia
Wann und wie wendet sich Zeit?
Authors: Küchenhoff Joachim
Published: June 2023

Die Arbeit will einen Beitrag dazu leisten, Zeitenwenden zu verstehen. Es ist nicht ohne weiteres klar, wie sich Zeit überhaupt wenden kann und wohin sie sich wendet. Die objektive Zeit wendet sich niemals, sie schreitet nur voran. Hingegen wendet sich die erlebbare Zeit, ob sie nun individuell oder kollektiv erlebt wird. Sie wendet sich zwischen den Zeitmodi Vergangenheit, Gegenwart und Zukunft hin und her. Von dynamischen oder reziproken Zeitenwenden können wir sprechen, wenn das Wechselspiel der Zeitmodi erhalten bleibt, von erstarrten Zeitenwenden hingegen, wenn sich das Erleben auf einen Modus fixiert; klinisch wird dies in der Depression, der Manie und manchen Formen psychotischen Erlebens deutlich. Im kollektiven Erleben kann eine reziproke Zeitenwende unmöglich werden, wenn die objektiven Verhältnisse einzelne Zeitmodi blockieren. Das lässt sich am Verlust von Zukunft in der Klimakatastrophe zeigen.
The Effectiveness of Hypnobirthing Practices and the Use of Whatsapp Groups in Increasing Pregnant Women's Knowledge of Hypnobirthing
Authors: Ritonga Paruhum Tiruon , Siburian Urhuhe Dena
Published: June 2023

Approaching childbirth, physiologically, the mother experiences fear, anxiety and worry which, if excessive, can increase the risk that can harm the mother and fetus, so the mother needs relaxation, one of which is hypnobirthing. During a pandemic, social media can be utilized, namely the WhatsApp Group. This study aims to find out whether there are differences in the effectiveness of hypnobirthing practices compared to using WhatsApp Groups in increasing pregnant women's knowledge about hypnobirthing. The type of research is experimental, namely quasi-experimental (quasi-experimental) by giving treatment to hypnobirthing practices and using WhatsApp Groups, each consisting of 15 pregnant women. Data collection was carried out during the class of pregnant women in Sitompul Village, Panggabean Village and Simorangkir Village. Univariate analysis method by looking at the factors and distribution of the independent and dependent variables. Bivariate analysis to determine the relationship between the two variables. The effectiveness of the treatment is known by the T test to see which factors are most effective in influencing knowledge. The results showed that the majority of respondents were of healthy reproductive age (20-35 years), third trimester of pregnancy, primi para and multipara, housewife occupations. Hypnobirthing practice is effective in increasing knowledge with p-value = 0.000 <0.05. The use of WhatsApp groups is effective in increasing knowledge with p-value = 0.009 <0.05. There is no difference in the effectiveness of hypnobirthing practices and the use of WhatsApp Groups in increasing knowledge with the Mann Whitney T test where p-value = 0.446 >0.05). It was concluded that there was an increase in knowledge about hypnobirthing after implementing hypnobirthing practices and after becoming a member of the WhatsApp Group. There is no difference in increasing knowledge of hypnobirthing practices by using WhatsApp Groups.

 

Keywords: Hypnobirthing, Knowledge, Practice, WhatsApp Group
Analysis Of The Relationship Between HBA1C and Serum Galectin-3 Levels in Subjects With Type 2 Of Diabetes Mellitus
Authors: Firayanti Zaifah , Widaningsih Yuyun , Kurniawan Liong Boy , Sanusi Himawan , Zainuddin Andi Alfian , Esa Tenri
Published: June 2023

Type 2 diabetes mellitus is a disease characterized by increased blood glucose levels known as hyperglycemia. This disease can be diagnosed by examining HbA1c (glycated hemoglobin). Hemoglobin A1c is a minor component of hemoglobin related to glucose. Meanwhile, galectin-3 is a protein encoded in humans by the LGALS3 gene. This study aimed to clarify the relationship between HbA1c and serum galectin-3 levels in patients with type 2 diabetes. This study was conducted using an observational analysis technique with a cross-sectional study design. This research was conducted at the Clinical Pathology Laboratory, Hasanuddin University State University Hospital, and Laboratorium Universitas Hasanuddin Medical Research Center State College Hospital Universitas Hasanuddin Makassar. This research was conducted from January to March 2023. The population in this study were all patients with type 2 DM who visited the Hasanuddin University Hospital (RSPTN-UH) for treatment a total of 112 patients. Research sampling technique with non-probability purposive sampling. The sample of this study was 60 patients. Data analysis with the Independent T-test or Mann-Whitney test. The results of the study were that serum Galectin-3 levels in uncontrolled type 2 diabetes mellitus had a higher average value of 20.18 ± 6.15 ng/mL compared to controlled type 2 diabetes mellitus, namely 14.80 ± 6.41 ng/ mL although there was a statistically significant difference (p=0.012) but no significant correlation was found between HbA1c and serum Galectin-3 levels in type 2 diabetes mellitus subjects (r=0.176 p=0.179) with the distribution of data in the Scatterplot not forming a linear relationship pattern. It is recommended that type 2 Diabetes Mellitus patients carry out an HbA1c examination as an effective test to control glucose levels, reduce the risk of complications, and maintain a healthy lifestyle to avoid type 2 DM.

Keyword: HbA1c, Serum Galectin-3, Type 2 Diabetes Mellitus
Psychological Well-Being of Mental Health Nurses in the Time of Covid 19: Systematic Literature Review
Authors: Hardi Aswin , Mustikasari Mustikasari , Panjaitan Ria Utami , Susanti Herni
Published: June 2023

During the COVID-19 pandemic, the psychological well-being of nurses is at stake. As nurses, especially mental health nurses, the stressful environment around day-to-day care and additional work in addition to nursing care and inaccuracies in how to cope with problems that arose during the pandemic, left mental health nurses psychologically burdened. The research method used in this study is a systematic approach adopted for the literature review. Databases searched include SCIENCE DIRECT, SCOPUS, SPINGERLINK, TAYLOR & FRANCIS, and WILEY. The search was conducted from September 2022 to December 2022. Strict criteria were given that the study must examine the psychological well-being status of mental health nurses during COVID-19; It must be stated that the mental health nurse in question is a nurse who works in mental health services, including in hospitals and communities; using quantitative and qualitative methods as well as mix methods must be published in English: and the required studies were published in March 2020 to 2022. All 10 articles were included in the review to be assessed for quality. For data analysis, a deductive approach is carried out according to the theory of psychological well-being, and content analysis is carried out, namely grouping categories after the integration of quantitative evidence, qualitative, mixed methods, and then categorial synthesis is carried out. The results of this study stated that the initial search resulted in a total of 7,752 publications, ultimately resulting in 10 studies reviewed, in the form of 6 quantitative studies, 3 mixed methods studies, and 1 qualitative study. Six (6) categories are arranged according to Ryff's theory of psychological well-being: autonomy, environmental mastery, self-development, positive relationships with others, purpose in life, and self-acceptance. The studies reviewed show that the efforts made by mental health nurses in providing nursing care in accordance with COVID-19 prevention and control programs have shown success in maintaining the psychological well-being status of mental nurses

 

Keyword: COVID-19, Nurse Mental Health, Psychological well-being
Analysis of the Implementation of Non-Smoking Area Policy in Madiun Middle Schools and High Schools
Authors: Kahendra Fariz , Widjanarko Bagoes Bagoes , Agushybana Farid
Published: June 2023

Indonesia became the second largest cigarette market in the world. Based on the 2018 Riskesdas data, the prevalence of smokers aged over 15 years was 33.8 percent Based on Madiun Regency Regional Regulation Number 10 of 2020 Concerning Non-Smoking Areas. The aim of this research is to find out about smoking-free area policies in junior high schools and high schools in Madiun City. The implementation of this research was carried out in January-February 2023 in the Madiun City Middle School and High School environment with the research subjects being 35 school principals or persons in charge of smoking-free areas in Middle and High Schools in Madiun City. The sampling procedure was proportional random sampling. collection of research data with primary data collected using a questionnaire Implementation of policies according to van horn and van meter theory. Data analysis in this study is multivariate analysis with multiple regression tests..The results showed that there was influence from the social, economic and political environment (p value 0.012), there was an influence on the implementor's position (p value 0.016), and there was no influence on the character of the executing agent (p value 0.837) in the Madiun City Middle School and High School environment. There is a need for support from the Education Office and the school itself, such as providing visual media as facilities and infrastructure that support the implementation of smoking-free areas and continuously socialize the dangers of smoking at every school meeting and ceremonial activities or morning assembly. This will play a role in making a policy easier to remember in the school community.

 
Keyword:  Implementation, No-Smoking Areas, Policy, Schools, Smoking
Acceptance of COVID-19 Vaccination during the COVID-19 Pandemic in Sei Penuh City
Authors: Sitanggang Hendra Dhermawan , Kalsum Ummi , Butar Butar Marta
Published: June 2023

The incidence of COVID-19 has shown a downward trend in recent months, but transmission is still possible; it is because COVID-19 is still a pandemic, and there may be new variants that can cause an increase in cases. Countermeasures are carried out not only through prevention efforts by health protocols but also through vaccination efforts. Vaccines have proven to impact efforts to deal with the COVID-19 pandemic positively. Accepting the COVID-19 vaccine is one of the keys to fulfilling vaccination achievements. Sei Penuh City is one of the areas in Jambi Province where COVID-19 vaccination coverage is still low, at 53.6% as of August 28, 2022. Therefore, this study aimed to determine the determinants of COVID-19 vaccine acceptance in Sei Penuh City. A cross-sectional design study was applied and conducted in Sei Penuh City in July 2022. The population of this study were all people aged ≥18 years who live in Sei Penuh City, with a sample of 300 people. Sampling used a 2-stage cluster method using Probability Proportional to Size (PPS). Villages in this PPS are villages with COVID-19 vaccine coverage second dose less than 50%. Data were analyzed descriptively and analytically. The results showed that respondents who received a second dose or more of the vaccine were 54.7%. Multivariate analysis showed that health protocols (aPR=1.64; 95%CI: 0.99-2.70) and education level (aPR=1.38; 95%CI: 1.02-1.86) were associated with receiving a second dose of vaccines. This study found that health protocol was the most dominant risk factor for COVID-19 vaccine acceptance. Socialization and education still need to be carried out, especially about the urgency of the COVID-19 vaccine in facing the COVID-19 pandemic. In addition, people with low education levels need more attention in increasing the achievement of COVID-19 vaccination.

 

Keywords: COVID-19 vaccine, education level, health protocol, preventive behaviour
The Relationship between Knowledge and Attitudes of Food Handlers with the Implementation of Food Hygiene Sanitation at Restaurants in Minas District in 2022
Authors: Sembiring Haesti , Perangin-Angin Susanti Br , Silitonga Lely Mayanti
Published: June 2023

Food and drink are the most important necessities of life and have the potential to be contaminated with pathogenic bacteria. Factors that influence food quality are the behavior of food handlers in the application of personal hygiene and food sanitation. This study aims to determine the relationship between the knowledge and attitudes of food handlers and the application of food sanitation hygiene in restaurants in Minas District. This research is a quantitative research with cross sectional research design. The location in the research is a restaurant in Minas District. The time of this research was conducted from March to May 2022. The research population was all food handlers at restaurants in Minas District, 18 restaurants in Minas District consisting of 36 food handlers. The sampling technique is total sampling. The sample in this study were 36 people. The type of data in this study is primary data obtained by direct observation Primary data obtained from surveys to locations in restaurants in Minas District and direct interviews with respondents using questionnaires and observation sheets. Data collection was carried out by direct observation and interviews with food handlers using a questionnaire. Data analysis with chi square test. The results showed that there was a significant relationship between the knowledge of food handlers and the application of food sanitation hygiene (p-value = 0.005) and there was a significant relationship between the attitudes of food handlers and the application of food sanitation hygiene (p-value = 0.002). It is recommended that food handlers should wash their hands with soap and running water before doing work, wear masks and not chat while processing food.

 

Keywords: Attitude, Food Handlers, Hygiene, Knowledge, Sanitation
THE RELATIONSHIP BETWEEN THE MECHANICAL PROPERTIES OF ARMOR STEEL AND ITS BALLISTIC RESISTANCE (overview)
Authors: KONONENKO G.A. , KIMSTACH T.V. , SAFRONOVA О.А. , PODOLSKY R.V.
Published: June 2023

The relevance of the work. Today the industry is actively developing in the field of manufacturing means for protection of all types of armored vehicles against fire damage by small arms and artillery weapons. At present, ensuring high dynamic resistance of armor against modern weapons without increasing its thickness and, accordingly, the mass of the structure as a whole is achieved due to the use of various non-metallic materials (armor ceramics, high-strength fabrics, etc.) as part of compositions with traditional steel armor. The development and design of workable materials and structures of armor protection is a complex scientific and technical problem. To ensure high stability and survivability of armor, it is necessary to establish a relationship between the mechanical properties of armor steel and its ballistic characteristics. Purpose. Based on the analysis of literary sources, determine the relationship between the mechanical properties of steel armor and its ballistic characteristics. Methodology. The method of scientific and technical literature analysis regarding the requirements for armored obstacles is applied. The results. Analytical investigations of the relationship between the main mechanical properties of steel armor and its ballistic characteristics are conducted in the work, which will allow predicting the optimal combination of mechanical properties’ values that will ensure high ballistic resistance. Increasing the hardness of armor steel usually reduces the impact toughness of steels. It is noted that the ballistic characteristics of structural and armor steels are correlated with the tensile strength limit. The existence of a correlation between the strength properties of materials and their resistance to crack propagation under high-speed (explosive) loading is shown. For a number of materials, there is a close relationship between predicted and measured ballistic characteristics at high deformations associated with ballistic impact, when compressive flow stress is used as a measure of material strength. Increasing impact toughness, especially in high and ultra-high hardness classes, is an important task in the development of armor steel. Hardness limits are therefore set for specific grades of steel armor to control impact toughness during production and reduce the risk of fracture or other brittle damage for specific steel compositions and applications.
THE INFLUENCE OF WELDING TYPE ON THE STRENGTH CHARACTERISTICS OF CONNECTIONS OF REINFORCING BARS WITH A METAL PLATE
Authors: KONOPLIANYK O.Yu. , KOTOV М.А. , VOLCHUK V.M. , ILIEV І. М.
Published: June 2023

Introduction. In reinforced concrete structures, the ends of reinforcing bars are anchored in the concrete by launching the reinforcement beyond the considered section for the length of the force transfer zone from the reinforcement to the concrete as well as by using anchoring devices. If the required design length of the reinforcement cannot be ensured, special measures to anchor the reinforcement bars are applied [1, p. 5.36]. One of these measures is to install special anchoring devices in the form of plates at the ends of the longitudinal bars. When anchoring devices in the form of plates, special attention is paid to the welding type of the plate with the bar, which should prevent the bar from being pulled out when longitudinal forces from external load are applied. Materials and methodology. The material to be investigated was reinforcing bars of class A500C with diameters of 25 and 32 mm, connected at the ends to metal plates by means of contact welding. Holes with a diameter equal to the diameter of the reinforcement were drilled in the metal plates. The bars were inserted into the holes flush with the surface of the plates and welded to the plates by one and double sided welding. A total of two bars were used per welded joint. The strength of welded connection of reinforcing bars with plates was determined on the tensile testing machine HMS-100 by applying maximum tensile force to reinforcing bars. The fracture pattern of each reinforcing bar to plate joint was noted. The results of the experiment. As a result of the experiment, it was found that the destruction of the connection between the two reinforcing bars of 25 mm and 32 mm diameter and the metal plate during one-sided welding occurred by destroying the welding connection and pulling the bars out of the plate. When the bars were joined on both sides, there was no pulling out of the plate. In this case, one 25-mm-diameter bar joint is out of service due to bar breakage in the area of contact with the weld and the other is due to the exhaustion of its physical yield strength. The destruction of the 32mm diameter bars and metal plate joint in the two-sided welding process was due to the rupture of one bar in the area of its contact with the weld and the cracking of the other bar's contact with the weld. Conclusions. As a result of the experiment, it was found that the strength values of the welded connection between reinforcing bars 25 mm and 32 mm in diameter and a metal plate at bilateral welding were 1,33−1,36 times higher than those at one-sided welding.
THE INFLUENCE OF CHEMICAL COMPOSITION, HEATING TEMPERATURE AND COOLING RATE ON THE FORMATION OF STRUCTURAL COMPONENTS OF STEELS
Authors: FILONENKO N.Yu. , BABACHENKO O.I. , KONONENKO G.A. , VOLCHUK V.M.
Published: June 2023

Problem statement. The formation of structural components starts with the hardening of steels. Therefore, it is important to investigate the influence of chemical composition, temperature of additional heating and cooling rate of the melt on the formation of structural components of steels. The purpose of the research – to compare the influence of the chemical composition, heating temperature and cooling rate on the formation of structural components in steels. Methods. To determine the features of the structural state of steels, we use microstructural analysis, X-ray microanalysis, X-ray diffraction method and surface etching of specimens with nital and hot solution of sodium picrate. Results. In the work, a study of steel specimens with different carbon, manganese and silicon content was carried out. We compared the structural state of steel in the cross-section of continuous cast steel billet and steel of a similar chemical composition after additional heating above the liquidus line at 50 °C, 150 °C and cooling at rates of 10–104 °C/s. Scientific novelty. It was found that in the process of manufacturing of continuous cast steel billets, when cooling in a crystallizer at the rate of ~104 ºС/s in the surface zone of the billet of steels with a carbon content of ≥ 0.5 wt.%, manganese ≥ 0.75 wt.% and silicon ≥ 0.45 wt.% the δ-ferrite formation and γ-iron dendrites formation from the melt are completely suppressed. For the first time, the effect of heating temperature above the liquidus line up to 150 °С and cooling rate of 10–103 °С/s on the structure formation of experimental carbon steels was investigated. It was established that additional heating above the liquidus line and cooling at rates of 102–103°C/s almost completely inhibits the formation of ferrite along the grain boundaries, enhances formation of a more uniform structure, an increase in the dispersion of structural components, simultaneous solid-solution and dispersion hardening of steel, and improvement of mechanical properties of steels. In addition, a decrease in the volume fraction of the areas containing liquation elements (manganese and silicon) was observed. The areas were distributed more evenly, which suggests that there could be a decrease in the difference in the content of chemical elements, compared to the condition without additional heating of the melt. Practical value. The use of the obtained results could allow to develop technologies for obtaining steels with a more uniform structure.
An Experiential Engineering Learning Model for Knowledge and State of Flow Creation
Authors: Habash Riadh
Published: June 2023

Education in professional degree programs is charged with serious responsibilities in the classroom and practice spaces. To meet these responsibilities, educators must serve as both teachers and learners in both spaces. This article demonstrates an experiential project-based learning model to enhance the teaching of an undergraduate engineering course on mechatronics. An important aspect of this model is an experiential learning model that complements the well-known international CDIO™ Initiative which is an innovative educational framework for producing the next generation of engineers. This model reflects on challenges of experiential learning for group-based design projects and faculty competition teams where learners including faculty and students collaborate to create their community of design and practice to physically and virtually share knowledge, perspectives, and opinions. The model reveals the impact of collaboration, practice spaces and exhibitions, and open educational resources in the enhancement of engineering education. The experience of adopting the model for several years recommends a number of practical approaches instructors may embrace to enable knowledge creation and enhance the effect of flow experience. Keywords: experiential learning, knowledge creation, reflective practice, state of flow, community of design and practice, open educational resource
Embodied Energy and Carbon Footprint of Concrete Compared to Other Construction Materials
Authors: Estrada Hector , Lee Luke
Published: June 2023

The main objective of infrastructure design codes is to protect the public’s welfare, health, and safety, none of which appear directly related to the current sustainability movement that has focused on protecting the natural environment, conserving resources, and minimizing the toxicity of construction materials and processes. Some United States jurisdictions have adopted language related to sustainability based on the United States Green Building Council to curtail adverse effects of global climate change, minimize environmental impact of new construction of built assets (i.e., buildings and infrastructure), and in some cases, improve air quality in the community. The focus of this paper is to compare the embodied energy and carbon footprint of various construction materials: concrete, steel, timber, masonry, and fiber reinforced composites. To properly compare these materials from a sustainability standpoint, we propose an index that characterizes material ecological properties by dividing strength and stiffness by embodied energy. The index is similar to the structural specific properties index used to characterize the mechanical properties of materials (i.e., strength and stiffness divided by density). Using this ecological index, concrete and steel appear to be the most sustainable materials. As a result of their higher strength and stiffness, concrete and steel require less embodied energy to satisfy specific structural demands. Keywords: embodied energy, carbon footprint, LEED, specific embodied energy
Utilising Magnus Effect to Increase Downforce in Motorsport
Authors: Lin Mark , Lewis Patrick , Papadopoulos Periklis
Published: June 2023

The Magnus effect is the generation of a sidewise force on a spinning cylindrical or spherical solid immersed in a fluid (liquid or gas) when there is relative motion between the spinning body and the fluid. This is most commonly seen in baseball, tennis, or European football where the ball’s trajectory is curved due to its rotation. The idea of using the Magnus effect in an airfoil to produce lift was proposed in 1941 in a patent application by Massey. This is also known as Kutta–Joukowski lift, first analyzed by Kutta and Joulowski in the late 19th century. In maritime applications, it is known as Flettner rotor sails, first used in the 1920's. Although Magnus effect is not new, the idea of using it on a racecar wing to improve downforce has not been extensively studied. The concept is to replace the front leading-edge of the wing with a rotating cylinder of the same diameter to produce additional circulation around the foil. This idea was born out of discussion at San Jose State University’s Formula SAE team as a way to create variable downforce on their wings. Although the idea was proposed but it was never built because of the complexity in the construction and a lack of rigorous analysis. Subsequently from our CFD simulation, it shows that by imposing a +2U angular velocity to the front LE cap (i.e., rotating upwards in the negative-x direction), we could gain 4.25% of downforce. Since the leading edge cap is roughly cylindrical, physically replacing it by a cylinder would not cause a visible change to the race car’s geometry while improving the aerodynamics using Magnus effect. This CFD data show promise to take the next step of building a physical prototype and perform aerodynamic experiments to validate this finding. Keywords: Magnus effect, aerodynamics, downforce, CFD, motorsport.
Miskonsepsi Mahasiswa dalam Menyelesaikan Masalah Standar Deviasi Ditinjau dari Tipe Kepribadian Influence
Authors: Afnenda Adinda Beauty , Sukoriyanto Sukoriyanto , Parta I Nengah
Published: June 2023

Dibutuhkan kemampuan dan pemahaman mendalam dalam menanggapi, dan menyelesaikan masalah matematika. Perbedaan pemahaman konsep oleh siswa dengan para ahli disebut dengan miskonsepsi. Setiap individu memiliki cara tersendiri dalam menanggapi, dan memahami suatu permasalahan, hal tersebut dipengaruhi oleh adanya perbedaan tipe kepribadian masing-masing siswa. Tujuan penelitian ini adalah mendeskripsikan miskonsepsi mahasiswa matematika dalam menyelesaikan masalah standar deviasi ditinjau dari tipe kepribadian influence. Instrumen pada penelitian ini adalah angket tipe kepribadian, soal tes tulis, dan pedoman wawancara. Berdasarkan teknik purposive sampling, data hasil angket tes tipe kepribadian, dan soal tes yang diberikan kepada 35 mahasiswa matematika offering H mata kuliah metode statistika, terdapat 3 mahasiswa tipe kepribadian influence yang mengalami miskonsepsi sebagai subjek dari penelitian ini. Hasil dari penelitian ini mengungkapkan bahwa terdapat tiga miskonsepsi yang dialami mahasiswa, yakni (1) range dan variasi data mempengaruhi ukuran standar deviasi; (2) histogram dengan penyebaran paling dekat mean, memiliki standar deviasi yang besar; dan (3) histogram dengan mean tertinggi, memiliki standar deviasi yang tinggi pula. Temuan ini diharapkan dapat memperbaiki cara pendidik dalam mengajarkan statistika deskriptif, terutama konsep standar deviasi yang sedemikian hingga miskonsepsi tersebut dapat diminimalisir.
In Memoriam. Juan Pajares (1959 - 2020)
Authors: Álvarez Gonzalo , Gemeno César
Published: June 2023

In Memoriam. Juan Pajares
Factores determinantes del reclutamiento de encinas (Quercus ilex) en mosaicos agroforestales. Dispersión de bellotas por urracas (Pica pica) y establecimiento de plántulas
Authors: Martínez de Baroja Villalón Loreto
Published: June 2023

La restauración forestal de tierras agrícolas abandonadas es uno de los grandes retos ecológicos actuales. Diversos factores pueden acelerar o limitar esta restauración en ambientes mediterráneos. El objetivo general de la Tesis Doctoral fue evaluar el efecto de diferentes factores que determinan el reclutamiento de encinas (Quercus ilex) en campos agrícolas abandonados, centrándose en la dispersión de bellotas por urracas (Pica pica) y el establecimiento de plántulas.

La urraca es una dispersora masiva y efectiva de bellotas. Los adultos reproductores, especialmente los machos, fueron los individuos que más bellotas dispersaron, almacenando el 86% de las bellotas removidas. El almacenamiento de bellotas por la urraca es un proceso jerárquico de toma de decisiones a diferentes escalas espaciales dirigido primero por la territorialidad y después por la preferencia de sitios para esconderlas, seleccionando las zonas aradas antes que la plantación arbórea y estas antes que el herbazal. Esta preferencia de hábitats coincidió con la densidad de plántulas emergidas en ellos.

La depredación de bellotas y plántulas emergidas es el principal factor limitante del reclutamiento de encinas en campos agrícolas abandonados en ambientes mediterráneos. La variabilidad climática interanual, la orientación y la distancia a islotes de encinas plantados para asistir la regeneración natural afectaron a la emergencia y la supervivencia temprana de las plántulas de encinas. Además, redujeron el crecimiento de las hierbas, facilitando indirectamente la emergencia y la supervivencia temprana cerca de los islotes. Los islotes de encinas plantados son una fuente de bellotas clave donde no hay remanentes de vegetación natural.
Estudio de la alimentación de la Nutria (Lutra lutra) en el alto Tormes y su selección con respecto a la comunidad ictiológica.
Authors: Jiménez Corbacho Carlos
Published: June 2023

La nutria (Lutra lutra) es uno de los depredadores principales en los ecosistemas fluviales europeos y peninsulares. En el centro peninsular, y en el ri?o Tormes en su totalidad, y en el valle del alto Tormes (Sierra de Gredos, A?vila) en concreto, poseen una de las poblaciones de nutria mejor conservadas de toda la cuenca del Duero, en un entorno natural y bien conservado. El objetivo principal fue detectar una posible selectividad con respecto a la comunidad pisci?cola en la dieta de este animal, en e?poca estival, a lo largo de 16 kms de ri?o, dividido en subtramos. Se desarrollo? un estudio para comprobar la composicio?n y proporciones de la dieta, analizando 127 excrementos recogidos. De forma paralela, se realizaron censos indirectos por medio del buceo a lo largo del tramo estudiado, para determinar la estructura y composicio?n de la comunidad pisci?cola. En ambos grupos de datos se anotaron variables de nu?mero, frecuencias relativas y totales, y distancia de cada subtramo. La dieta en esta e?poca fue muy variada, los peces (Osteichthyes) (52 %) fue el grupo mas consumido, otros taxones importantes en la dieta en esta estacio?n fueron: los Invertebrados (17%) en su mayori?a insectos y deca?podos, reptiles (10%) con Natrix sp. como componente principal, anfibios (6%) con Bufo sp. en su mayori?a, y presas ocasionales como las aves y los mami?feros. Se ha detectado la presencia y consumo significativos del cangrejo sen?al (Pascifastacus leniusculus). La fauna pisci?cola en este tramo del ri?o estuvo dominada por los cipri?nidos, mayormente boga del Duero (Pseudochondrostoma duriense) y cacho (Squalius carolitertii) en menor medida, al igual que la trucha comu?n (Salmo trutta). Los ana?lisis arrojaron patrones de seleccio?n con respecto a la comunidad pisci?cola: el cacho (Squalius carolitertii) estuvo seleccionado de forma muy positiva, hubo un rechazo significativo hacia la boga (Pseudochondrostoma duriense), y una ligera seleccio?n positiva hacia la trucha comu?n (Salmo trutta). La nutria puede desempen?ar el papel de especie paraguas, y debe ser tenida en cuenta a la hora de realizar planes de gestio?n y conservacio?n fluviales.
Policy Brief: P-12 leadership and university partnerships
Authors: Edwards Wesley
Published: June 2023

In this brief, we highlight specific state policy goals for the funding and development of stronger university leadership and school district partnerships. We note that legislative efforts should support evidence-based practices and, where appropriate, we draw on recent research to support the components of highlighted partnerships.
The Role of Palliative Care in Cancer Treatment
Authors: Kalpoli Zumaira
Published: June 2023

The Role of Palliative Care in Cancer Treatment
Exploring the Intersection of Criminal Laws and Technological Advances: Challenges and Implications
Authors: tabish hassan
Published: June 2023

Exploring the Intersection of Criminal Laws and TechnologicalAdvances: Challenges and Implications
On Embedded Normativity - An Active Inference account of agency beyond flesh
Authors: GUÉNIN--CARLUT Avel , Albarracin Mahault
Published: June 2023

We introduce and motivate the concept of \emph{embedded normativity} to account for the externalization of social norms in the material environment through human social activity. We ground this notion in the Active Inference framework, and more specifically through the derived Skilled Intentionality framework of ecological perception and action. This framework considers that skilled agent experience the world as a landscape of affordances, or opportunities for action. This landscape is inherently normative, as its experience is tied to the agent's anticipations over its own behaviour (and therefore, indirectly, to its motivations). We emphasize that given this framework, normativity does not exist inside or outside the agent's boundaries, but is brought about by its engagement with the world. We discuss the dynamics of \emph{internalization} and \emph{externalization} by which agents come to project normativity onto elements of their environment, and experience this normativity as a simple attraction toward favoured states. Given this account, we revisit earlier descriptions of the shared material and sociocultural niche enable the broadcasting and integration of norms. Finally, we discuss how embedded normativity can be brought into existence by the perception of humans, and relate our discussion to the ontological stance of participatory realism.
Tutorial Buku Digital Berbasis EPUB
Authors: USK Penerbit FKIP , Awalyatun Rafiqah
Published: June 2023

Ebook berbasis epub ini dapat dibuat dengan menggunakan aplikasi Sigil, dan dapat dibaca dengan android menggunakan aplikasi Gitdenreader sedangkan pada laptop atau komputer harus memasang readium pada chrome atau epubreader pada firefox. Pada proses pembuatan ebook ini, dapat ditambahkan dengan bahan video atau audio khususnya bagi para guru yang ingin mengembangkan proses pembelajaran berbasis media paperless.
The Role of Artificial Intelligence in Cancer Diagnosis and Treatment: Current Applications and Future Perspectives
Authors: Kubarat Basneer
Published: June 2023

The Role of Artificial Intelligence in Cancer Diagnosis andTreatment: Current Applications and Future Perspectives
Reporting of T1520I and F1534C knockdown resistance (kdr) mutations in Aedes albopictus from northern West Bengal (India) by Modak & Saha (2022) is a probable case of Aedes aegypti contamination or misidentification
Authors: Singh Om Prakash , Kaur Taranjeet
Published: June 2023

Recently, Modak & Saha (2022)1 reported the presence of two knockdown resistance (kdr) mutations—T1520I and F1534C, in the voltage-gated sodium channel of Aedes albopictus collected from northern West Bengal (India). Here, we provide plausible evidence that the reported DNA haplotypes (wild, and with T1520I+F1534C mutations) are originated from Aedes aegypti, not from Ae. albopictus.