bluuebunny/crossref_metadata_2025 huggingface dataset:
Heavy metals contamination in sediments of Bharalu river, Guwahati, Assam, India: A tributary of river Brahmaputra
Authors: Bhuyan Rajashree , Brahma Pinki , Chabukdhara Mayuri , Tyagi Neha , Gupta Sanjay Kumar , Malik Tabarak
Published: April 2023

This study aimed to assess heavy metals in the surface sediments of the Bharalu river, India. Metal concentrations ranged from 6.65−54.6 mg/kg for Ni, 25.2−250.0 mg/kg for Zn, 83.3−139.1 mg/kg for Pb, and 11940.0−31250.0 mg/kg for Fe. The level of metal contamination was assessed using sediment quality guidelines, geo-accumulation index (Igeo), enrichment factor (EF), pollution Load Index (PLI),Nemerow’s pollution index (PIN), and potential ecological risk index. Pb exceeded the sediment quality guidelines at all sites indicating a potential threat to the river ecosystem. (Igeo) and EF also showed moderate to severe enrichment for Pb. Potential ecological risk (RI) showed low risk in the sediments, and Pb is the major contributor to ecological risk. Overall, pollution indices revealed comparably higher contamination of the sediments in the downstream sites than in the upstream site. PCA and correlation matrix analysis indicated both anthropogenic and natural origins for metals. Among anthropogenic sources, urban discharges and waste dumping could be mainly attributed to metal contamination in the river sediments. These findings may aid in developing future river management methods explicitly aimed at tackling heavy metal pollution to prevent further damage to the river ecosystem.
Exploratory study on tissue ablation with cryoelectrolysis
Authors: Lugnani Franco , Ye Jianfei , Yuan Ling , Zhao John G. J. , Zhang Diana , Rubinsky Boris
Published: April 2023

This is an exploratory study on the effect of electrolysis, delivered during the thawing stage of a cryoablation protocol, on tissue ablation. This treatment protocol, that combines freezing and electrolysis, is named “cryoelectrolysis”. In cryoelectrolysis the cryoablation probe is also used as the electrolysis delivering electrode. The study was performed on the liver of Landrace pigs and the tissues were examined 24 hours after treatment (two pigs) and 48 hours after treatment (one pig). The cryoelectrolysis device and different cryoelectrolysis ablation configurations tested are described. This exploratory, non-statistical study shows that the addition of electrolysis expands the ablated area in comparison to cryoablation alone and that there is a substantial difference between the histological appearance of tissue treated by cryoablation alone, tissue treated by cryoablation and electrolysis at the anode and tissue treated by cryoablation and electrolysis at the cathode.
The internationalisation process: an opportunity for meaningful intercultural interaction or segregation in one UK university?
Authors: Corazzi Suzanne
Published: April 2023

This research was prompted by a perceived lack of meaningful interaction between home and international students in one UK university that has a long history of internationalisation. The study sits within an interpretative paradigm, and it explores the perceptions and experiences of academics and home students. Five focus groups were held with undergraduate home students, and 19 interviews were carried out with academics, 10 interviews with home students and 2 with recent graduates. Home students report feeling that international students have a group identity from which they are excluded. This sense of exclusion and their perceptions of being marginalised in comparison to their international peers appear to lie at the heart of a lack of mixing on campus. These findings imply that academics and institutions can only bring about meaningful intercultural interaction when the different groups of students come to realise that they have shared goals and equal status, with a learning environment that embraces who they are and who they are becoming.
Blue Earth Innovation Reduce Emission of Aircraft
Authors:   ivil Aviation Training Center/Affiliated Institute of Suranaree University of Technology, Sirisingha Sittha , Klueameephol Theppitak ,   Civil Aviation Training Center/Affiliated Institute of Suranaree University of Technology, Mangmool Piyawit ,   Civil Aviation Training Center/Affiliated Institute of Suranaree University of Technology
Published: April 2023

This academic paper focuses on the future of clean energy that will be used to propel aircraft in the future. The new type of clean energy will have significant positive impact on the environment as the current source of fuel generated from aircraft engine and from the aerospace industry. This study serves to promote awareness and to inspire research and development of new energy alternatives that can be utilized in the aerospace industry with the intention of reducing pollution. The resulting pollution emitted by aircraft engine during flight contributes to the higher year on year overall global temperature and the changes in seasonality from years before are causes for concern and the aerospace industry should take to heart the significance of impact that air travel has on the global environment. It is therefore very important for the major players in the aeronautical industry to take action to find ways to cut emissions to lower environmental impact. This means that manufacturers and engineers need to rethink their design and material use to enable the aeronautical industry to be more environmentally friendly which means innovative use of alternative sources of fuel or clean energy such as electric or hybrid engines while vehicles used in the airports should also be changed from combustion to electric. This will have a positive impact on the environment within the airport and the environment in general going forward. Improve engine performance and/or alternative fuel, aircraft parts to lower weight and thus pollution, airports must have ways to better manage traffic to improve fuel efficiency of aircraft.
Study of Learning Activities in Astronomy and Space of Primary School by Using Collaborative Learning
Authors:   Faculty of Education,Rajabhat Rajanagarindra University Chachoengsao, Kulsirirat Kathawut , Punyawattanakul Thanin ,   Faculty of Education,Rajabhat Rajanagarindra University Chachoengsao
Published: April 2023

This research used collaborative learning management model in organizing astronomy learning activities to develop learning outcomes and teamwork for primary school. There were two objectives of the study as. 1) To study the results of cooperative learning activities in astronomy, in knowledge and self-evaluation on the astronomy activity., 2) To compare the learning achievement before and after organizing collaborative learning activities. The samples in this study were grade 4–6 students of the Demonstration School. The Instrument in dependent study was learning activities in astronomy at the elementary level that used collaborative learning. The collected data were. 1) The characteristic of working as teamwork. The result yielded that the students who were receiving collaborative learning by the self-assessment survey they had teamwork skills. The overall score was 91.93/125. The average score was 3.57. The standard deviation was 1.08 which was very high level. Most of the students 32.64% reported they moderately work as team meanwhile 27.73% of them regularly work as team. For the remaining, 24% of them. Sometimes work as team 11.64% and 4% of them rarely and never work as team respectively. 2) Fourty multiple choices learning achievement test were administrated measured before and after the experiment or a single group, measured 2 times. The data were analyzed by T-tests dependent. The research results found that students who received collaborative learning get higher academic achievement, which significantly higher than the pre-test at .05 level, statistical of (t = 14.36).
Marketing Mix Factors Related to The Elderly Behavior Regarding Consumption of Suki Food in Bangkok
Authors:   Faculty of Home Economics Technology, Rajamangala University of Technology Phra Nakhon, Klanpolrang Thanatchaporn , Suttha Walaiporn ,   Rajamangala University of Technology Phra Nakhon
Published: April 2023

The objectives of this study were : 1) to investigate the marketing mix factors influencing sukiyaki consumption among the elderly in Bangkok, 2) to explore behavior of the elderly in sukiyaki consumption, and 3) to study the relationship between marketing mix factors and the behavior of the elderly in sukiyaki consumption in Bangkok. The sample was 400 elderly people aged 60 years and over who have lived in Bangkok and consumed sukiyaki food. A questionnaire was used as a research instrument. Data were analyzed using statistics, including frequency, percentage, mean and standard deviation as well as Chi-Square for hypothesis testing. The results of this study indicated that : 1) overall opinion of the sample towards the marketing mix factors influencing sukiyaki consumption in terms of six aspects, namely: people, place, price, product, process, and physical evidence were at a high level while promotion was at a moderate level. 2) In terms of sukiyaki consumption behavior, the most popular ingredient in sukiyaki was fresh vegetables, followed by meat, and meat products, noodles and flour products, eggs and mushrooms, respectively. The most popular place for sukiyaki consumption was eating in a restaurant. The most commonly reasons for sukiyaki consumption were the taste, quality, freshness, various menus, and reasonable price for quality and quantity. The most commonly frequency for sukiyaki consumption was less than once a month, followed by once a month. An average consumption cost per time per person was 201-300 baht. Most of the sample preferred consuming sukiyaki during Saturday - Sunday from 1.01 PM - 4.00 PM. The number of people eating at one time was 4 people or more. Most of them were family members. 3) Marketing mix factors and the sukiyaki consumption behavior, it was found that product, price, place, promotion, people, process, and physical evidence were related with sukiyaki consumption behavior in terms of consumption reason, monthly frequency consumption, average consumption cost per time per person, and time of consumption with a statistical significance level of .05.
Entrepreneurial Orientation Of Women Entrepreneur: A Bibliometric Analysis
Authors: Damayanti Reza , Purnomo Margo , Purbasari Ratih
Published: April 2023

This paper wants to provide knowledge about the distribution of research on women entrepreneurs in the world, both at the country and organization levels. This research uses the VOSviewer 1.6.18 data processing application, namely co-authorship by countries and organizations. Women entrepreneurs encounter a number of hurdles while starting and running businesses, particularly in emerging and developing markets. Studies on women's motives for establishing a business, their capacity to acquire money, and varied success levels among men and women entrepreneurs demonstrate that the disparity between involvement and business performance appears to be similar across cultures and countries. Future research should look into women entrepreneurs at the organizational level, according to the recommendations.
Factors influencing farmers' forestland-use changes over 15 years (2005–2020) in Thua Thien Hue province, Vietnam
Authors: Pham T.P.T. , Tran N.T. , Kull C.A. , Shackleton R.T. , Cochard R. , Nguyen T.H.M. , Ngo T.D. , Nguyen T.H.V. , Tran Q.C. , Vu T.T.T.
Published: April 2023

Over the last decades, Vietnam has seen substantial shifts in forest landscape uses and associated livelihoods. We document the livelihood transformations in Nam Dong, a mountainous district of Central Vietnam, where land uses have changed from the utilisation of products from natural
forests and shifting cultivation (swidden agriculture) to acacia tree-dominated plantation forestry. Forestry policies (forestland allocation, plantation development agendas), the increase in the economic value of acacia, and household livelihood assets are the primary factors driving these
changes. We also found that there are differences in the access to and ownership of forestland with regard to households of different communities and between poor vs wealthy households. Therefore, careful attention needs to be paid to guide future land use policies in the area to foster social
and ecological sustainability.
Synthesis of Al–Sn alloys by direct chill casting under the effect of mechanical stirring: an experimental and simulation optimization study
Authors: Patel Deepak , Biswas Prasenjit , Mallik Archana , Das Sanjeev
Published: April 2023

Aluminium–tin (Al–Sn) immiscible alloys for bearing materials are difficult to cast by the conventional direct chill casting method. At higher concentrations, Sn accumulates at the bottom of the as-cast solid due to a significant density difference in Al and Sn. In the present investigation, Al–Sn alloys were fabricated by the direct chill (DC) casting method under the influence of mechanical forced convection (MFC). A computer-based simulation approach has been implemented to study the effect of MFC device position and impeller speed on melt flow and solidification. Optimized parameters were experimentally validated and the quality of as-cast ingots was evaluated. Hence, this optimization approach can be used to produce better quality Al–Sn bearing materials with uniformly distributed Sn phase in Al-matrix by the direct chill casting route.
Desde la documentación activa a la revitalización contextualizada: experiencias con comunidades kichwahablantes en Ecuador
Authors: Haboud Bumachar Marleen
Published: April 2023

Durante los últimos 30 años, Ecuador ha visto transformaciones importantes con respecto a las políticas relacionadas con las lenguas indígenas en el país. Por otra parte, estudiosos extranjeros y locales han llevado a cabo numerosas investigaciones lingüísticas y antropológicas sobre varias de las lenguas indígenas habladas en el país; sin embargo, estas han tenido bajo o ningún impacto en el mantenimiento de las lenguas, las mismas que muestran una tendencia persistente al desplazamiento. Enmarcado en prácticas de documentación activa-revitalización, este artículo se propone mostrar brevemente las tendencias de desplazamiento del kichwa en Ecuador, ilustrar y analizar procesos de investigación que basados en el quehacer colaborativo entre hablantes y no hablantes, pasan de ser una documentación que beneficia exclusivamente a la comunidad científica lingüística, para centrarse en los hablantes como los primeros agentes-beneficiarios de procesos revitalizadores; y describir algunas de las estrategias de revitalización que emergen de activistas kichwahablantes. Finalmente, reflexionaré brevemente sobre las metodologías utilizadas y la necesidad de avanzar hacia verdaderas prácticas de interculturalidad basadas en interrelaciones más equitativas que lleguen a impactar en los niveles micro, meso y macro.
Should Wrongfulness be Required or is Fault Enough? Arts 1:101, 4:101 ff PETL
Authors: Knetsch Jonas
Published: April 2023

When drafting the Principles of European Tort Law (PETL), the members of the European Group on Tort Law decided to omit wrongfulness as a specific requirement for civil liability, considering it as a concept underlying the notions of interference with legally protected interests and the standard of conduct. This paper tends to demonstrate that this terminological and conceptual choice is still valid eighteen years after the publication of the PETL. On the basis of two case studies examined under German and French law, it is suggested that national traditions are too disparate to adopt a common understanding of what wrongfulness exactly means to a tort lawyer in Europe. The irreconcilability of the different interpretations becomes particularly apparent in mixed tort law systems, such as Japan or Belgium, where the French and the German approach struggle to coexist.
Recent advances in the genetics of alopecia areata
Authors: Buket Basmanav F. , Betz Regina C.
Published: April 2023

Alopecia areata (AA) is a common autoimmune-mediated hair loss disorder in humans with an estimated lifetime risk of approximately 2 %. Episodes of hair loss usually begin with isolated hairless patches that may progress to complete hair loss over the entire body. A familial occurrence of AA is well established, with recurrence risks of about 6–8 % in first-degree relatives. AA is a multifactorial disorder involving both environmental and genetic risk factors. Previous research has identified 14 susceptibility loci, most of which implicate genes involved in the immune response. The following review presents a summary of the latest findings from genome-wide association, sequencing and gene expression studies of AA, as well as their contribution to the recent therapeutic developments.
Syndromic ichthyoses
Authors: Fischer Judith , Hotz Alrun , Komlosi Katalin
Published: April 2023

Inherited ichthyoses are classified as Mendelian disorders of cornification (MEDOC), which are further defined on the basis of clinical and genetic features and can be divided into non-syndromic and syndromic forms. To date, mutations in more than 30 genes are known to result in various types of syndromic ichthyoses, which, in addition to mostly generalised scaling and hyperkeratosis of the skin, also show additional organ involvement. The syndromic ichthyoses are generally very rare and are classified based on the mode of inheritance, and can be further subdivided according to the predominant symptoms.

In our review we provide a concise overview of the most prevalent syndromic forms of ichthyosis within each subgroup. We emphasize the importance of the clinical assessment of complex syndromes even in the era of genetic testing as a first-tier diagnostic and specifically the need to actively assess potential organ involvement in patients with ichthyosis, thereby enabling efficient diagnostic and therapeutic approaches and timely access to specialized centers for rare disorders of cornifications. As part of the Freiburg Center for Rare Diseases a Center for Cornification Disorders was recently established with collaboration of the Institute of Human Genetics and the Department of Dermatology.

An early diagnosis of syndromes will be of direct benefit to the patient regarding interventional and therapeutic measures e. g. in syndromes with cardiac or metabolic involvement and allows informed reproductive options and access to prenatal and preimplantation genetic diagnosis in the family.
PERANCANGAN HEAT EXCHANGER SHELL AND TUBE UNTUK PREHEATER FEED WATER MEMANFAATKAN GAS BUANG BOILER PABRIK GULA TASIKMADU
Authors: Pangestu Aura Danar , Al-Janan Dony Hidayat
Published: April 2023

Boiler adalah salah satu mesin thermal yang menghasilkan uap, uap tersebut dihasilkan dariair yang dipanaskan hingga mendidih. Boiler sering digunakan pada industri secara luas, peningkatanefisiensi boiler perlu dilakukan untuk mengurangi kerugian kalor dan menekankonsumsi bahan bakar boiler. Penggunaan heat exchanger untuk memanaskan air denganmemanfaatkan gas buang boiler merupakan metode yang tepat untuk menghemat bahan bakarboiler serta mempercepat pembentukan uap dan dapat mengurangi kerugian kalor padaboiler Pabrik Gula Tasikmadu. Penelitian kali ini bertujuan untuk membuat rancangan heatexchanger yang dapat memanfaatkan gas buang boiler untuk mempercepat pemanasan airumpan boiler dan menghemat konsumsi bahan bakar boiler berdasarkan data boiler PabrikGula Tasikmadu. Perhitungan perancangan menggunakan standar TEMA. Hasil penelitian iniadalah spesifikasi dan desain heat exchanger, serta perhitungan simulasi menggunakan softwaresolidworks.
STUDI EKSPERIMENTAL PENGARUH KECEPATAN SUPERFISIAL ALIRAN SEARAH TERHADAP KARAKTERISTIK DAN PARAMETER ALIRAN STRATIFIED PADA PIPA HORIZONTAL
Authors: Mahadiputra Adolvin Arnol , Karnowo Karnowo , Anis Samsudin
Published: April 2023

Penelitian ini bertujuan untuk mengetahui pengaruh kecepatan superfisial liquid (VSL) dan kecepatan superfisial gas (VSG) terhadap karakteristik (visualisasi pola aliran stratified, frekuensi hydraulic jump dan kecepatan hydraulic jump) dan parameter (fraksi hampa, liquid holdup dan gradien penurunan tekanan) pola aliran stratified pada aliran airudarapipa horizontal. Metode yang digunakan adalah eksperimental dengan pengujian variasi kecepatan superfisial liquid (VSL) dan kecepatan superfisial gas (VSG) yang dianalisa menggunakan metode image processing. Pengambilan data menggunakan high speed video camera dengan kecepatan 400 fps. Penelitian ini menggunakan pipa acrylic transparan berdiameter dalam 19 mm dan mempunyai penampang berbentuk lingkaran. Posisi pipa dalam keadaan horisontal dengan fluida air sebagai liquid dan udara sebagai gas. Penelitian ini dilakukan dengan asumsi temperatur ruang konstan. Hasil penelitian diperoleh kecepatan superfisial liquid dan gas yang optimal untuk menghindari hydraulic jump pada  pengaplikasian industri dengan peningkatan maksimal kecepatan superfisial liquid (VSL) adalah 0,064 mâ„s dan kecepatan superfisial gas (VSG) adalah 3,254 mâ„s, untuk peningkatan VSL= 0,050 mâ„s maksimal peningkatan VSG = 4,140 mâ„. Penelitian ini menjelaskan perubahan kecepatan superfisial liquid (VSL) dan kecepatan superfisial gas (VSG) mempengaruhi karakteristik dan paramater pola aliran stratified. Hal ini ditunjukkan dengan berubahnya visualisasi bentuk pola aliran, nilai frekuensi hydraulic jump, kecepatan hydraulic jump, fraksihampa, liquid holdup dan gradien tekanan.
PENGARUH VARIASI KOMPOSISI BAHAN PEREKAT TERHADAP KARAKTERISTIK FISIK DAN MEKANIK BRIKET LIMBAH ORGANIK
Authors: Fahlevi Muhammad Riza , Aryadi Widya , Sunyoto Sunyoto
Published: April 2023

Tujuan dari penelitian ini adalah untuk mengetahui pengaruh variasi perekat tepung kanji, tetes tebu dan kotoran sapi terhadap, nilai kalor, densitas, nilai tekan aksial, dan drop test briket dan komposisi bahan perekat tepung kanji, tetes tebu dan kotoran sapi pada briket limbah organik yang menghasilkan nilai kalor, densitas, nilai tekan aksial,dan drop test briket secara maksimal. Bahan baku diarangkan dengan furnace bertemperatur suhu 400oC selama 2 jam. Selanjutnya diberi variasi perekat dengan memberi perekatkemudian dicampurkan dengan bahan baku dengan ukuran 60 mesh. Hasil dari penelitian variasi komposisi perekat menunjukkan adanya pengaruh terhadap karakteristikbriket melalui spesimen yang diberikan perlakuan perbandingan variasi perekat tepung tapioka 3 %, tetes tebu 3 %, dan kotoran sapi 4 % dengan nilai kalor tertinggi sebesar 5879,76 kal/gr, Densitas 0,7087 gr/cm3, Kuat Tekan 2,87 kg/cm2, drop test 0,17 %.
Pengaruh Tekanan Injektor Terhadap Performa Mesin Diesel Multi Silinder Dengan Bahan Bakar Biodiesel (B30)
Authors: Setiawan Lutfi Hery , Karnowo Karnowo , Aryadi Widya
Published: April 2023

Penelitian ini bertujuan untuk mengetahui besarnya torsi, daya dan konsumsi bahan bakar, terhadap variasi injektor 17 MPa, 18 MPa, 19 MPa dan 20 MPa dengan menggunakan bahan bakar B0S100 dan B30S70. Hasil penelitian variasi tekanan injektor menggunakan bahan bakar B0S100terhadap daya, torsi dan konsumsi bahan bakar terbaik terdapat pada tekanan 19 MPa, sebesar 45,574 kW, 144,795 Nm dan 40,705 cc/menit. Sedangkan Hasil penelitian variasi tekanan injektor menggunakan bahan bakar B30S70terhadap daya, torsi dan konsumsi bahan bakar terbaik terdapat pada tekanan 20 MPa sebesar 45,539 kW, 143.27 Nm dan 40,066 cc/menit
Pengaruh Penggunaan Fender-Frame-Drone dan Beban Terhadap Konsumsi Arus Baterai
Authors: Wicaksono Cahyo Budi , Aryadi Widya , Anis Samsudin
Published: April 2023

Tujuan dari penelitian ini yaitu mengetahui pengaruh beban dan konsumsi daya baterai menggunakan frame F450 dengan frame fender. Variasi penambahan beban yaitu 0,5 Kg, 1 Kg, 1,5 Kg, dan 2 Kg dan dengan durasi terbang sama yaitu 2 menit dalam ketinggian 1 meter.Metode penelitian yang digunakan adalah eksperimen. Pengujian konsumsi daya baterai menggunakan multimeter. Data hasil penelitian dianalisis dengan cara mengamati secara langsung. Setelah mendapatkan hasil eksperimen kemudian mengolah data dan menyimpulkan hasil penelitian yang telah dilakukan, selanjutnya di tampilkan dalam bentuk grafik dan tabel. Hasil penelitian menunjukkan bahwa penggunaan baterai dari Frame F450 tanpa beban yaitu 0,625 miliamper dan 1,45833 miliamper dengan penambahan beban 2 Kg. Frame fender tanpa beban yaitu 0,444 miliamper dan penambahan beban 2 Kg yaitu 1 miliamper. Penggunaan daya baterai di buat sama dengan gram per menit. Dari data yang di dapat Jadi konsumsi daya baterai pada frame fender lebih irit dibandingkan frame F450.
Pengaruh Variasi Sudut Potong Utama dan Sudut Buang Pahat HSS Terhadap Kekasaran Permukaan Baja ST 60 Hasil Proses CNC Turning
Authors: Indriyani Devi , Sumbodo Wirawan
Published: April 2023

Tujuan penelitian ini untuk mengetahui pengaruh dari variasi sudut potong utama dan sudut buang terhadap kekasaran permukaan menggunakan mesin CNC Turning. Metode yang digunakan yaitu eksperimen dengan teknik analisisa data secara deskriptif dari hasil pengujian. Pahat yang digunakan yaitu pahat HSS Bohler Â½ X 4 dengan variasi sudut potong utama 80Ëš, 75Ëš dan 70Ëš serta variasi sudut buang 18Ëš, 15Ëš dan 12Ëš. Spesimen yang digunakan adalah baja ST 60 dan alat pengujian kekasaran permukaan menggunakan Surface RoughnessTeaster Mitutoyo SJ-301. Hasil penelitian menunjukkan semakin besar sudut potong utama dan sudut buang yang semakin rendah menghasilkan nilai kekasaran permukaan semakin rendah. Nilai kekasaran permukaan rata-rata aritmatik (Ra) tertinggi sebesar 6,98 Î¼m dari parameter sudut potong utama 70Ëš dan sudut buang 18Ëš Nilai kekasaran permukaan rata-rata aritmatik (Ra) terendah dihasilkan dari parameter sudut potong utama 80Ëš dan sudut buang 12Ëš sebesar 3.15 Î¼m.
PENGARUH CAMPURAN BAHAN BAKAR SOLAR DENGAN BIODIESEL MINYAK LEMAK SAPI (BEEF TALLOW) TERHADAP KONSUMSI BAHAN BAKAR PADA MESIN DIESEL
Authors: Winarko David Bayu , Karnowo Karnowo , Aryadi Widya
Published: April 2023

Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi biodiesel yang ditambahkan pada tiap variasi campuran bahan bakar terhadap konsumsi bahan bakar pada motor diesel. Variasi campuran bahan bakar antara solar dengan biodiesel yang digunakan adalah B0, B5, B10, B15 dan B20 Sedangkan variasi putaran mesin yang digunakan sebesar 2000, 3000,4000 rpm. Metode yang digunakan pada penelitian ini adalah eksperimen. Proses produksi biodiesellemak sapi menggunakan metode transesterifikasi. Pengujian konsumsi bahan bakar menggunakan buret. kemudian menyimpulkan hasil dari penelitian dalam bentuk tabel dan grafik. Campuran B20 merupakan campuran yang paling efisien. tiga variasi putaran B20 menghasilkan rata-rata konsumsi bahan bakar terendah dari rata-rata campuran lainnya yaitu sebesar 1,410kg/j, sedangkan untuk B0 konsumsi bahan bakar rata-rata tertinggi yaitu sebesar 1,860 kg/j. Hasil daya yang dihasilkan campuran B20 menghasilkan daya rata-rata 47,20 kW dibandingkan solar murni yang menghasikan daya sebesar 49,86 kW. Lebih besar daripada campuran B20, namun hasil torsi menghasilkan rata- rata terbesar pada campuran B5 sebesar78,7 Nm.
Analisis Aliran Udara Pada Ruang Pengering Low Temperature Dryer Dengan Simulasi CFD
Authors: Huda Miftachul , Saputro Danang Dwi
Published: April 2023

Food drying technology in maintaining food quality has become an attraction for the food industry. Low temperature drying was the option for drying food while maintaining the nutritional value of food remain intact. The purpose of this study was to determine the air and temperature distribution that occurred in the drying chamber using Computational Fluid Dynamic (CFD) simulations. Geometry of the drying chamber has been done previously in 3D design drawings using software. Various parameters for simulation have been used. The result showed air flowed unevenly in some shelves of drying chamber so that some adjustments were made to the geometry of the drying chamber. After several changes, the geometry of drying chamber could distribute air and heat flow evenly. The air flow into the drying chamber at 2 m/s dropped to 1 m/s upto 1,2 m/s when flow on the drying rack. While the initial air temperature of 50oC was distributed evenly on a drying rack with temperatures ranging from 45oC to 50oC.
PENGARUH VARIASI MAINTENANCE AXIAL FAN COOLING TOWER DI PT. GEO DIPA ENERGU DIENG
Authors: Widyarsa I Wayan Adi , Bahatmaka Aldias
Published: April 2023

In an effort to overcome the problem of damage to the machine, it is necessary to have a maintenance process, so as to minimize the impact of the damage, repair the damage, and prevent the damage itself. Maintenance is the process of maintaining or caring for an object which aims to ensure the operation of machines, equipment or other assets can be used continuously and efficiently in the long term. According to the results of research conducted by micromain, maintenance can save up to 545% of the return on costs required during maintenance. PT Geodipa Energi, in an effort to prevent greater damage due to damage to the axial fan, carries out maintenance on the axial fan cooling tower. Taking into account various factors, the blades were replaced on several fans and the slope of the blades on the axial fan was corrected. This was done so that the service life of the axial fan increased, the performance was more efficient, and to avoid damage such as the axial fan breaking.
ВИКОРИСТАННЯ ІНФОРМАЦІЙНИХ ТЕХНОЛОГІЙ ДИСТАНЦІЙНОГО НАВЧАННЯ У ПІДГОТОВЦІ МАЙБУТНІХ УЧИТЕЛІВ БІОЛОГІЇ ПІД ЧАС ПАНДЕМІЇ COVID-19
Authors: ГРАМАТИК НАДІЯ
Published: April 2023

У статті охарактеризовано кілька прикладних методів, які формують методологію дослідження, а також було проведено з використанням теоретичних методів: системний аналіз і синтез, індукцію і дедукцію, порівняння, класифікацію, узагальнення та систематизацію, ідеалізацію та абстрагування. Сучасний етап розвитку педагогічної освіти у світі переживає інтенсивні і масштабні перетворення, зумовлені не тільки актуальними завданнями формування у студентів особистості, а й залучення системи освіти до світових інтеграційних процесів, що відбуваються в умовах інформатизації та глобалізації. Доведено, що цілеспрямоване набуття знань, умінь і навичок майбутніх учителів біології є важливим компонентом освіти у зв'язку з глобальним викликом через пандемію, спричинену поширенням коронавірусу SARS-CoV-2 так як більшість країн виявилися не готовими до цього.
ПЕРСПЕКТИВИ ВПРОВАДЖЕННЯ ІДЕЙ ВИХОВАННЯ ТОЛЕРАНТНОСТІ В ДОШКІЛЬНИКІВ ЗАСОБАМИ СУЧАСНОЇ ДИТЯЧОЇ ЛІТЕРАТУРИ В ОСВІТНІЙ ПРОЦЕС ЗАКЛАДУ ДОШКІЛЬНОЇ ОСВІТИ
Authors: ДЕЛЕНКО ВАЛЕНТИНА
Published: April 2023

У статті висвітлено ідеї виховання толерантності в дошкільників засобами дитячої літератури (друга пол. ХХ – поч. ХХІ ст.), визначено основні умови та ефективніметоди їх упровадження в освітній процес закладу дошкільної освіти (ЗДО). Запропоновано критерії відбору й перелік творів для дітейна тему толерантності. Окреслено деякі методичні аспекти опрацювання оповідань і казок В. Сухомлинського, Н. Гербіш, К. Бабкіної. Доведено дієвість різних методів і форм роботи, зокрема читання, розказування, бесіди на основі прочитаного, інсценізації, сюжетно-рольові гри та ін.)
ПОГЛИБЛЕНЕ ВИВЧЕННЯ РОБОТОТЕХНІКИ У ШКОЛІ ВПРОВАДЖЕННЯМ ВИБІРКОВИХ НАВЧАЛЬНИХ КУРСІВ
Authors: МЕЛЬНИЧУК ЛІЛІЯ , ЯШАН БОГДАН , КОНДУР ОКСАНА
Published: April 2023

У статті на основі аналізу модельних навчальних програми з інформатики для 5–6 класів, рекомендованих Міністерством освіти і науки України, визначено місце теми "Робототехніка" у шкільному курсі інформатики НУШ. Обґрунтовано актуальність запровадження вибіркового інтеграційного курсу "Основи робототехніки". Запропоновано розроблений та апробований курс з основ робототехніки на базі конструкторів серії RoboKit, який спрямований на: формування базових знань і навичок учнів з метою полегшення подальшого вивчення мов програмування, їх застосування; розвиток здібностей до дослідницької, аналітичної роботи, експериментування, критичного мислення; розвиток в учнів відповідальності, терплячості, організова ності, посидючості та інших позитивних якостей особистості.
ПРОБЛЕМА РОЗВИТКУ СОЦІАЛЬНО-ЕМОЦІЙНОГО ІНТЕЛЕКТУ МАЙБУТНІХ УЧИТЕЛІВ ПОЧАТКОВИХ КЛАСІВ У ПЕРІОД ВІЙНИ
Authors: ЦЮНЯК ОКСАНА , ДОВБЕНКО СВІТЛАНА
Published: April 2023

Стаття присвячена проблемі розвитку соціально-емоційного інтелекту майбутніх учителів початкових класів у період війни. Зокрема, розкрито сутність понять "емоційний інтелект", "соціальний інтелект", "соціально-емоційний інтелект майбутніх учителів початкових класів". Визначено, що специфічною особливістю професійної підготовки майбутніх учителів початкових класів у закладах вищої освіти в період війни є те, що засвоєння комплексу необхідних загальнотеоретичних знань, умінь і навичок для успішного виконання професійних функцій повинно відбуватися з використанням різних хвилинок рефлексії, вправ і технік, що спрямовані на формування емпатії, довірливого ставлення усіх учасників освітнього процесу один до одного. Розвиток соціально-емоційного інтелекту майбутніх учителів початкових класів пов'язаний з оптимізацією мотиваційної сфери, формуванням уміння саморегуляції, посиленням адаптивних можливостей, соціальної активності, професійної майстерності, цілеспрямованості, вмотивованості на якісне виконання професійних обов'язків у різних умовах, зокрема, і у період воєнного часу.
Pronóstico de consumo de energía eléctrica residencial de corto plazo utilizando algoritmos de aprendizaje automático y profundo
Authors: Yajure Ramírez César Aristóteles
Published: April 2023

El objetivo de esta investigación es crear modelos de predicción de consumo de energía eléctrica para el corto plazo, utilizando el algoritmo de regresión lineal múltiple y una red neuronal artificial. Es una investigación de tipo descriptiva-explicativa, y se usa la metodología de la ciencia de datos para alcanzar el objetivo planteado. Los modelos se entrenan y evalúan utilizando los datos de energía eléctrica facturada mensual en Uruguay, durante el período 2000-2022, además de las mediciones de temperatura ambiente y humedad relativa, así como la variación porcentual del índice de protección al consumidor. A través de un análisis de correlación y de un análisis de componentes principales, se verifica la importancia de las variables explicativas seleccionadas, previo a la obtención de los modelos. El modelo de regresión lineal tuvo un R2 de 0,782 y el modelo de la red neuronal de 0,797, los residuos se distribuyeron normalmente para ambos modelos, y las métricas RMSE, MAE, y MAPE tuvieron valores similares también en ambos modelos. El modelo de la red neuronal tuvo un mejor desempeño, en comparación con el modelo de regresión lineal, en lo que respecta a la predicción de la energía eléctrica para los meses de julio y agosto del año 2022.
Modelo de visión artificial para la apertura de puerta de acceso a una oficina
Authors: Petrlik Azabache Ivan Carlo , Rodriguez Rodriguez Ciro
Published: April 2023

El objetivo de este trabajo es presentar una propuesta de Modelo de Arquitectura Cognitiva Artificial SOAR basada en el proceso de visión, reconocimiento de patrones y toma de decisiones que realiza el ser humano. El entorno debe garantizar ciertas condiciones previas para su correcto funcionamiento. Nuestro prototipo de sistema de arquitectura artificial cognitiva está bioinspirado en la forma en que los humanos trabajan para determinar si una persona es conocida o no.
Case report: right sided endocarditis in pediatric patient after surgical treatment of tetralogy Fallot
Authors: Mirza Halimic , A Kadic , Z Begic , S Dizdar , S Cepic-Kapic
Published: April 2023

Right-side endocarditis is a well-defined clinical entity, rarer than left-side endocarditis. Infective endocarditis in children has multiple challenges. A history of congenital heart disease is the most common risk factor, although other emerging predisposing conditions have important relevance. We report the clinical presentation, diagnosis and management in a pediatric patient with isolated native pulmonary valve endocarditis one year after surgical treatment of Tetralogy Fallot.
T-sejtes nagy granuláris lymphocytás leukémia ezer arca és sikeres kezelése
Authors: Kovács Szilamér , Szabó Zsuzsanna , Iványi János László , Szendrei Tamás , Plander Márk
Published: April 2023

Bevezetés

A T-sejtes nagy granuláris lymphocytás leukémia egy ritka, rett T-sejtes neoplázia, mely változatos klinikai lefolyást mutat és gyakran társul autoimmun szövődményekkel.

Esetismertetés

Idős férfi betegünknél lymphocytosis és neutropenia hátterében igazolt T-LGLL mellett több autoimmun betegség is kialakult, mint gluténérzékenység, primer biliáris cirrhosis, tiszta vörösvértest-aplázia. A súlyos, rendszeres vörösvértest-transzfúziót igénylő tiszta vörösvértest-aplázia a standard immunszuppreszív gyógyszerekre refrakternek bizonyult, végül alemtuzumab hatására remisszióba került.

Megbeszélés

Bemutatjuk a T-LGLL-ben előforduló autoimmun szövődmények pathomechanizmusát, illetve röviden tárgyaljuk a refrakter esetek kezelési lehetőségeit.
Azithromycin in the clinic of infectious diseases
Authors:   Bogomolets National Medical University, Kyiv, Ukraine, Kramarov S.O. , Seriakova I.Yu. ,   Bogomolets National Medical University, Kyiv, Ukraine
Published: April 2023

Infectious diseases are extremely common among children, characterized by a severe course and are the leading cause of death among young children. Purpose - to increase the awareness of medical workers regarding the current trends in the therapy of infectious diseases and highlight the feasibility of using azithromycin, based on the latest international recommendations. This review presents the main characteristics of the most common infectious diseases, as well as modern approaches to their treatment. Antibiotic therapy is an integral part of the treatment of most infections. Azithromycin is an antibacterial drug from the group of macrolides, characterized by a wide range of applications in pediatric practice. We considered the mechanisms of its bacteriostatic, antimicrobial, immunomodulatory activity and presented the results of numerous studies on the effectiveness of azithromycin use in infectious diseases. Conclusions. Azithromycin is an effective and proven antibacterial agent for various pathological conditions, such as diseases of the lower respiratory tract (pneumonia, acute bronchitis, bronchiolitis), acute intestinal infections and Lyme borreliosis. Studies of this drug show good tolerability, low rate of adverse reactions and high safety profile, which allows it to be prescribed to young children, and bacteriostatic, antimicrobial, immunomodulatory and bactericidal activity contribute to a wide range of applications in pediatric practice. No conflict of interests was declared by the authors.
Assessment of quality of life in children with a combination of functional dyspepsia and irritable bowel syndrome
Authors:   Kharkiv Medical Academy of Post-graduate Education, Ukraine, Belousova O.Yu. , Zimnytska T.V. ,   V.N. Karazin Kharkiv National University, Ukraine, Kazaryan L.V. ,   Kharkiv Medical Academy of Post-graduate Education, Ukraine
Published: April 2023

The prevalence of functional gastrointestinal disorders (FGID) in children ranges from 19% to 40%, depending on age. The combination of functional dyspepsia (FD) and irritable bowel syndrome (IBS) is detected in 15-44.6% of patients with FGID. Their course is characterized by more pronounced clinical symptoms: abdominal pain, which is combined with flatulence, nausea, difficulty in defecation or diarrhea, impaired stool consistency, feeling of incomplete bowel movement and deterioration in quality of life. Purpose - to assess the quality of life in children with a combination of FD and IBS to optimize therapy. Materials and methods. The study included 44 children with a combination FD and IBS aged 6 to 18 years (the main group). The control group consisted of 30 practically healthy children of the same age. Diagnoses of FD and IBS were made on the basis of clinical symptoms according to the Rome criteria IV (2016). A survey of children and their parents was conducted using the international questionnaire PedsQL™ 4.0 (Pediatrics Quality of Life Inventory), which is one of the most popular questionnaires in the world, has proven to be a simple, reliable, sensitive method for studying the quality of life of healthy and sick children of different ages (2-17 years). The questionnaire has general scales, but there is a separate version of the PedsQL™4.0 Generic Core Scales, which describes physical, emotional, social, and role functioning. Results. It was established that indicators of physical, emotional, social and school functioning and, as a result, indicators of psychosocial functioning and the overall quality of life assessment are significantly reduced in children with combined FD and IBS compared to the control group. Conclusions. Quality of life studies are an important component of a comprehensive assessment of the overall condition of a child with comorbid FD and IBS to prevent the development of these disorders, to improve quality of life, to reduce the time and cost of assessment, and to optimize therapy. The research was carried out in accordance with the principles of the Declaration of Helsinki. The Local Ethic Committee of the institution specified in the work adopted the study protocol. Informed consent of the children’s parents was obtained for the research. No conflict of interests was declared by the authors.
Hormone levels in adolescents with physiological and pathological course of puberty at different intensity of physical activity
Authors:   SI «Institute of Children and Adolescents Healthcare of the NAMS of Ukraine», Kharkiv, Rak L.I. , Kashkalda D.A. ,   SI «Institute of Children and Adolescents Healthcare of the NAMS of Ukraine», Kharkiv, Vodolazhskyi M.L. ,   SI «Institute of Children and Adolescents Healthcare of the NAMS of Ukraine», Kharkiv
Published: April 2023

Scientific evidence suggests a global pandemic of motor inactivity in adolescents that contributes to a number of chronic diseases. At the same time, regular physical activity has a favorable effect on the growth and sexual development of children and adolescents. Purpose - to evaluate the influence of physical activity (PA) on the hormonal blood spectrum of adolescents with physiological and pathological course of puberty. Materials and methods. We examined 55 boys and 46 girls aged 11-17 years old. Concentration of total testosterone, estradiol, cortisol, prolactin was determined by enzyme immunoassay, serotonin content was determined by fluorometric method. PA was studied using the questionnaire of IPAQ (International Physical Activity Questionnaire). Depending on the course of pubertal period adolescents were divided into 2 groups: the Group 1 - with physiological course of puberty; the Group 2 - with pathological course of puberty (boys with delayed puberty and girls with menstrual disorders). Adolescents were divided into 2 groups according to their PA level: low (<7 points) and high (>9 points) levels of PA. Results. It was found that in boys with a physiological course of puberty high PA compared with low activity leads to an increase in testosterone concentration and has a positive effect on physical development. High PA, on the contrary, decreases the content of testosterone in the pathological course of puberty and possibly aggravates puberty in boys. In girls high PA against the physiological course of puberty leads to an increase in serotonin, an indicator of the stress-limiting system. In the pathological course of puberty high PA has a positive effect, reducing the levels of testosterone and prolactin compared with low activity, which may contribute to the normalization of menstrual function, as well as reducing stress levels. Conclusions. Physical activity in adolescents should continue to be encouraged, given its positive effect on the hormonal blood spectrum. However, gender differences, pubertal development status and different mechanisms of adaptation to PA of girls and boys should be taken into account. It is very important to determine the optimal level of PA to meet the needs of children and adolescents, which would have a beneficial effect on both physical and psycho-emotional development. The research was carried out in accordance with the principles of the Helsinki Declaration. The study protocol was approved by the Local Ethics Committee of the participating institution. The informed consent of the patient was obtained for conducting the studies. No conflict of interests was declared by the authors.
Pathomorphosis of chronic gastroduodenitis in children against the background of selenium deficiency
Authors:   Bukovynian State Medical University, Chernivtsi, Ukraine, Sorokman T.V. , Sokolnyk I.S. ,   Bukovynian State Medical University, Chernivtsi, Ukraine, Ostapchuk V.G. ,   Bukovynian State Medical University, Chernivtsi, Ukraine
Published: April 2023

Purpose - to investigate the clinical and paraclinical features of the course of chronic gastroduodenitis (CGD) in children against the background of selenium deficiency. Materials and methods. Clinical and laboratory examination of 63 children (main group) aged from 7 to 18 years old, patients with CGD and 20 healthy children (comparison group) of the appropriate age was carried out. Quantitative determination of selenium in blood plasma was carried out using inductively coupled plasma mass spectrometry (ICP-MS) on an Optima 2000 DV spectrometer (Perkin Elmer, USA). Results. The average level of selenium in the blood plasma of children with inflammation of the gastric mucosa and duodenum was 73.45±4.21 μg/l, in children of the comparison group - 85.42±5.44 μg/l (p<0.05). 14 children had a selenium concentration within the normal range, and 49 patients had a significantly reduced selenium level (p<0.05), while 9 had the lowest level and was 57.2±3.5 ng/ml. Moderate erythema was recorded 3 times less often and a pronounced degree of erythema was recorded 4.6 times more often, in 4 people (8.1%) atrophy of the mucous membrane of the stomach and/or duodenum was detected, subatrophy was more often recorded (16.3%), 36.7% were diagnosed with the second degree of granularity. Was typicalhad nocturnal and «hungry» pain (22.4%). Conclusions. In the vast majority of children (77.7%), CGD occurs against the background of selenium deficiency in blood plasma. A direct correlation between the concentration of selenium in the blood plasma of sick children and the stage and activity of gastroduodenitis was established. The longer the course of the disease, the lower the levels of selenium in children's blood plasma. There is a pathomorphosis of CGD in children against the background of selenium deficiency: night and «hungry» pain, diffuse damage to the mucous membrane with erosions and subatrophy, a long course with high inflammatory activity are more common. The research was carried out in accordance with the principles of the Helsinki Declaration. The study protocol was approved by the Local Ethics Committee of the participating institution. The informed consent of the patient was obtained for conducting the studies. No conflict of interests was declared by the authors.