bluuebunny/crossref_metadata_2025 huggingface dataset:
Operational Verification of DC-DC Converters Used in Ecologically Sound Non Polluting Renewable Systems
Authors: Pasrija Raghav , Banerjee Sandeep , Tharani Kusum , Wadhera Tanmay , Joshi Saumyae , Sharma Sandeep
Published: July 2024

This research delves into the intricate control mechanisms governing renewable energy sources through the application of three distinct DC-DC converter technologies: the buck, boost, and buck-boost converters. Renewable energy sources like wind and solar can be pivotal in the future and become the primary source of energy for global energy requirements. Renewable sources are pollution-free and have minimal impact on the environment. This research illuminates the efficacy of these converters in orchestrating the optimal utilization of renewable energy sources, offering valuable contributions to the advancement of sustainable power systems. Open and closed loop control of a buck converter is studied along with its operation for the voltage regulation of an emulated PV panel. For the boost converter, a comprehensive exploration ensues through two closed-loop control methods: Perturb and Observe (P&O) algorithm and the incremental conductance method. Simulations are meticulously executed in MATLAB Simulink, interfacing with PV arrays and directing power toward battery charging. Meanwhile, the buck-boost converter undergoes simulation and evaluation, fed by a DC source and delivering power to a resistive load. Experimental validation is conducted for the buck converter, providing tangible insights into real-world performance. Conventional sources, primarily coal, which is the most used source of energy in Asian countries, including India, have adverse effects on the environment. Coal contributes to a huge proportion of pollutants in the environment and also the release of large quantities of greenhouse gases. Renewable energy resources can play a huge role in addressing the energy demands of Asian countries. They hold the ability to alleviate the environmental burden caused by conventional energy sources. Renewable energy sources also mitigate pollution and eliminate various hazardous effects of conventional energy sources. This study emphasises the adoption of such sources and underscores the pivotal role of DC-DC converter technologies in this adoption.
The Impact of Sewage Water Overflow (SWO): An Analysis of Zandspruit River in Cosmo City, Johannesburg, South Africa
Authors: Mavhungu T.C. , Mankga L.T.
Published: July 2024

Cosmo City, situated in Johannesburg, Gauteng, has been experiencing sewage water overflows (SWO) for several years, and this raises concerns about the water quality of Zandspruit River. The study aimed to investigate the impacts of SWO on the Zandspruit River, and the perceptions of the community towards SWO. Water samples were collected from three sampling sites of Zandspruit River. Some water quality parameters were measured in the field using a multi-parameter water quality meter while other parameters were analyzed at a SANAS accredited laboratory. Results were compared with South African water quality guidelines and most water quality parameters were within permissible set standards. However, COD, E. coli and turbidity were above permissible set standards which indicates a highly polluted river. Furthermore, we assessed perceptions of the Cosmo City community towards SWO through questionnaires. The community ascribed the main causes of SWOs to population growth, blocked, and broken sewers. This study revealed that SWO around Cosmo City has a negative impact on the quality of river water and poses health risks. The combined evidence from both the experimental analysis and the community perception survey underscores the urgent need for effective management strategies to address the negative environmental and human health implications of SWO in the Zandspruit River. By integrating these findings and considering the broader implications of pollution on both the ecosystem and community well-being, policymakers and stakeholders can work towards implementing sustainable solutions to mitigate the risks associated with sewage water overflows.
Mercury Contamination from Artisanal Small-scale Gold Mining Activities in Simpenan District, Sukabumi Regency, West Java, Indonesia
Authors: Nuryanty Cut-Dian , Riani Etty , Abidin Zaenal , Sutjahjo Surjono-Hadi , Riyadi Agung
Published: July 2024

Mercury is still used in the amalgamation process in small-scale gold processing. This study aims to evaluate the mercury contamination of various environmental media in the artisanal small-scale gold mining (ASGM) area in the Simpenan District, Sukabumi Regency. The ecological media examined in this study included groundwater, river water, soil, sediment, biota, and plants. The threshold number was determined using APHA 3125 and Indonesian National Standard (SNI) 7387:2009. Meanwhile, the mercury concentration in the ambient air was measured directly using a mercury analyser. Mercury concentrations in the water, soil, sediment, biota, and plant matrices were calculated using a calibration curve. The study found that the levels of mercury in groundwater, river water, and sediment were all below the applicable quality standards of <0.0001, <0.0001 and 0.001 mg/L, respectively. However, the levels of mercury in soil and plants were 27.28 and 0.52 mg/kg, respectively. Additionally, the levels of mercury in four types of fish found in a river adjacent to the ASGM location, namely beunteur (0.33 mg/kg), snakehead (0.05 mg/kg), catfish (0.26 mg/kg) and eel (0.20 mg/kg), exceeded the specified quality standards. In conclusion, mercury contamination is present in the soil, plants, and aquatic biota (fish) in the ASGM area in the Simpenan District, Sukabumi Regency.
Predictive values of cervix length measurement based on transvaginal ultrasonography
Authors: Wu Qian , Zang Ruiqi , Zhang Yong
Published: July 2024

BACKGROUND: Pregnancy is an important process in women’s life, which is widely concerned by women. In recent years, the incidence of premature delivery (PTD) becomes more and more higher due to the development of auxiliary reproduction and ovulation induction technologies and the changes of pregnant women’s lifestyle and physical quality. PTD not only affects postpartum recovery and causes great physical pains, but it also has adverse effects on the birth state of neonates and even leads to neonatal death OBJECTIVE: The predictive values of cervix length (CL) measurement based on transvaginal ultrasonography (TVUS) and pathological examination of placenta for premature delivery (PTD) were investigated and the correlation between PTD and infection was analyzed. METHODS: 120 pregnant women with PTD or high-risk factors for PTD admitted to The Affiliated Hospital of Southwest Medical University between February 2020 and March 2022 were included as the subjects and underwent pathological examination of placenta and TVUS for CL measurement. The final gestational age was set as the standard for the evaluation on the predictive values of pathological examination of placenta and TVUS. What’s more, 36 subjects in PTD group and 84 in normal delivery group (control group) underwent pathological examination of placenta for the analysis of the correlation between PTD and infection. RESULTS: The joint inspection method showed significantly better sensitivity, specificity, PPV, and NPV compared to single CL or pathological examination of the placenta (P< 0.05). Among pregnant women, those with CL ⩽ 30 mm and positive placental pathology had a higher proportion compared to those with CL > 30 mm and negative placental pathology (P< 0.05). Furthermore, the incidence of Ureaplasma Urealyticum (UU), Chlamydia Trachomatis (CT), and Chorioamnionitis (CA) in vaginal discharge of the preterm delivery (PTD) group was significantly higher than that of the control group (P< 0.05). CONCLUSION: The combination of CL ⩽ 30 mm and positive placental pathology could effectively predict PTD and placental infection was notably correlated with the occurrence of PTD.
Penyuluhan dan Pemeriksaan Kesehatan Pada Mahasiswa Indonesia di Kairo, Mesir
Authors: Nurhayati Eka , Rahimah Santun Bhekti , Garina Lisa Adhia
Published: July 2024

Menjadi mahasiswa di negara asing, bukanlah hal yang mudah. Banyak tantangan dan kendala yang harus dihadapi, termasuk salah satunya adalah masalah kesehatan. Mahasiswa Indonesia yang berada di Kairo, Mesir, banyak mengalami gangguan kesehatan terutama yang menyerang organ paru-paru seperti pneumonia dan tuberculosis. Mereka juga mengalami masalah penyakit tidak menular. Salah satu upaya yang bisa dilakukan adalah dengan menambah wawasan mereka dan melakukan pemeriksaan kesehatan sebagai upaya screening terhadap penyakit tidak menular. Tujuan kegiatan ini adalah menambah wawasan mengenai pneumonia dan tuberculosis serta melakukan pemeriksaan kesehatan kepada mahasiswa Indonesia di Kairo, Mesir. Kegiatan dilakukan dengan memberikan penyuluhan dalam bentuk kuliah 2 arah dan pemeriksaan kesehatan sederhana yaitu tekanan darah, nadi, gula darah sewaktu, kolesterol dan asam urat. Kegiatan diikuti oleh 39 orang mahasiswa. Penyuluhan mendapatkan respon positif dan diskusi berjalan dinamis. Hasil pemeriksaan menunjukkan bahwa nadi dan gula darah sewaktu seluruh mahasiswa berada pada tingkat normal. Kadar tekanan darah, kolesterol dan asam urat pada beberapa mahasiswa berada pada tingkat yang lebih tinggi dari normal.
The dimensions of uncertainty and ambiguity in adolescents and young adults' romantic relationships: A systematic review
Authors: Chiara Colombo Camilla , Confalonieri Emanuela , Cuccì Gaia
Published: July 2024

Contemporary romantic relationships in adolescence and young adulthood no longer follow a linear trajectory but come to be increasingly characterized by high heterogeneity. Social networks have also constituted a new context for interaction, which has given rise to the tendency to enact behaviors characterized by uncertainty and ambiguity. This study aims at providing a framework of the existing literature contributions on the dimensions of relational uncertainty and relational ambiguity in adolescents and young adults' romantic relationships. A state-of-art systematic review was performed on PsycInfo, Google Scholar, Scopus, and Science Direct, adopting the PRISMA statement. Through a qualitative analysis, four themes emerged from the 23 included articles: (a) the definitions of relational uncertainty and relational ambiguity, (b) the impact on the quality of the romantic relationship, (c) communicative and individual outcomes, and (d) coping strategies.
PERAN E-COMMERCE DALAM MENGEMBANGKAN BISNIS DI ERA DIGITAL
Authors: Mel Melati Melati
Published: July 2024

In the digital era, business actors must identify the potential and opportunities available to expand their business. Advancements in the digital era present increasingly sharp challenges and competition in capturing markets. E-commerce, as an online transaction system, facilitates business actors in interacting with customers through the internet. This research utilizes a qualitative method, namely through library research, by referencing several journals obtained from Google Scholar. The research concludes that e-commerce plays a role in developing businesses in the digital era. This role includes expanding market reach, facilitating product marketing and payment, improving operational efficiency, saving costs, providing easy access to website features, and providing customer data. Business actors also need to address challenges in business such as fraud, hacking, and price competition.
APAKAH BUDAYA ORGANISASI, KEPEMIMPINAN DAN DISIPLIN KERJA MEMPUNYAI PENGARUH TERHADAP KINERJA PEGAWAI KANTOR PELAYANAN KEKAYAAN NEGARA DAN LELANG SURABAYA
Authors: Kustiningsih Nanik , Munawwarah Raudatul , Rahayu Sri
Published: July 2024

Penilaian Kinerja dari suatu organisasi merupakan hal yang sangat penting mengingat melalui penilaian tersebut dapat diketahui sejauh mana organisasi tersebut mampu menyelesaikan tugas dan fungsinya dengan mengerahkan segenap sumber daya yang dimiliki. Ketika sebuah organisasi mengalami pencapaian kinerja yang baik, maka perlu diketahui variable-variabel apa saja yang melatarbelakangi keberhasilan tersebut. Untuk itu, penulis melakukan penelitian terkait kinerja yang dihubungkan dengan budaya kerja, kepemimpinan dan disiplin kerja di KPKNL Surabaya. Tujuan dilakukannya penelitian ini adalah untuk menganalisis dan mengetahui apakah budaya kerja, kepemimpinan, dan disiplin kinerja berpengaruh secara parsial maupun simultan terhadap kinerja pegawai KPKNL Surabaya.Penelitian ini menggunakan sampel jenuh yaitu semua pupulasi pegawai di KPKNL Surabaya dijadikan sampel dalam penelitian ini. Metode yang digunakan adalah pendekatan kuantitatif.Teknik analisis yang digunakan adalah regresi linier berganda dengan variabel bebas Budaya organisasi (X1), Kepemimpinan (X2), Disiplin Kerja (X3), dan variabel terikat adalah kinerja pegawai (Y).Hasil penelitian menunjukkan simpulan bahwa pengaruh budaya organisasi, kepemimpinan dan disiplin kerja terhadap kinerja pegawai pada Kantor Pelayanan Kekayaan Negara dan Lelang (KPKNL) Surabaya secara parsial maupun simultan teruji memiliki pengaruh yang signifikan terhadap kinerja pegawai, dengan variabel disiplin sebagai variabel yang mempunyai pengaruh dominan terhadap kinerja.
IMPACTO FUNCIONAL DA COVID-19: UMA ANÁLISE TRANSVERSAL POR MEIO DA ESCALA FUNCIONAL ESPECÍFICA DO PACIENTE
Authors: Rodrigues Josiane , Isolde Constantini Marina , Danielevicz Angelica , De Moraes Sirydakis Maria Eduarda , De la Rocha Freitas Cíntia , Sudatti Delevatti Rodrigo
Published: July 2024

Os benefícios da atividade física estão relacionados à sua prática e seus efeitos na saúde surgem de imediato e longo prazo. Alterações metabólicas, físicas, imunológicas e inflamatórias promovidas pelo exercício físico proporcionam melhora da capacidade funcional e da qualidade de vida. A COVID-19 trouxe diversas consequências para as funções fisiológicas humanas, principalmente nos pulmões, espalhando-se de forma sistêmica e as consequências relacionadas ainda são estudadas. Cabe ressaltar que o comprometimento no sistema musculoesquelético, devido ao tempo prolongado dos pacientes na UTI, durante a pandemia e também, os efeitos pós-infecção trouxe limitação de funcionalidade na realização de atividades da vida diária. Desta forma, o estudo analisa as atividades autorrelatadas por 29 pacientes que apresentaram quadros moderados à graves na fase aguda da doença COVID-19 que apresentaram quadros moderados à graves na fase aguda da doença COVID-19 ou apresentaram fadiga crônica pós acometimento pela doença, que participaram de um Ensaio Clínico Randomizado, através da Escala Funcional Específica do Paciente, como atividades limitadas pós infecção por COVID-19. Essas atividades se distribuem pelos domínios de locomoção, exercício físico, atividades laborais e descansar e dormir, sendo as atividades de locomoção de maior dificuldade de execução. A Escala Funcional Específica do Paciente pode ser de grande valia para direcionar o treinamento e reabilitação pós-COVID-19.
SISTEM INFORMASI PEMERINTAH DAERAH (SIPD) DALAM UPAYA MENCEGAH TERJADINYA FRAUD
Authors: Hayat Usep Saepul , Dhea Yulianti
Published: July 2024

Penelitian ini bertujuan untuk melihat implementasi penggunaan Sistem Informasi Pemerintahan Daerah (SIPD) dalam mencegah terjadinya fraud di Dinas X Kabupaten Bandung. Metode penelitian yang digunakan adalah pendekatan kualitatif dengan metode deskriptif. Teknik pengumpulan data yaitu dengan cara observasi lapangan dan melakukan wawancara dengan informan. Hasil penelitian menunjukan bahwa Sistem Informasi Pemerintahan Daerah (SIPD) sudah diterapkan di Dinas X Kabupaten Bandung. Namun dalam penerapannya masih terdapat kendala yang menyebabkan penggunaan SIPD belum optimal. Penggunaan SIPD dapat meningkatkan pengendalian internal  sehingga mempersempit ruang lingkup terjadinya fraud. SIPD sudah diterapkan di Dinas X Kabupaten Bandung dari tahun 2020, namun kendala koneksi dan kebiasaan menggunakan aplikasi sebelumnya menjadi hambatan dalam penerapan SIPD. Penggunaan SIPD meningkatkan kontrol belanja daerah karena setiap pengeluaran kas daerah harus diimbangi dengan di uploadnya bukti pengeluaran. Penelitian ini memiliki kebaruan jika dibandingkan dengan peneliti terdahulu, yaitu berfokus pada penerapan SIPD dalam meningkatkan pengendalian internal untuk mencegah penyalahgunaan dalam pengelolaan keuangan negara di Pemerintah Daerah.
A study of gamma-ray emission from OJ 287 using Fermi-LAT from 2015-2023
Authors: Pasumarti Vibhavasu , Desai Shantanu
Published: July 2024

We search for gamma-ray emission from OJ287 in the energy range from 0.1-300 GeV during 2015-2023, in coincidence with an extensive observing campaign to monitor the optical flux variability and polarization, as discussed in arXiv:2311.02372. We present results for eight segments in the aforementioned period, with each segment corresponding to an observing season. We report non-zero gamma-ray flux (with >10σ significance) for all the eight segments. The photon and energy flux observed during this period is and , respectively, while the SED can be fitted with a power law with a slope of 2.12±0.02. The observed luminosity is between 1045−1046 ergs/sec.
Influence of Discipline Related Factors on Career Choice of Medical Students, Intern Doctors and Recent Graduates in Bangladesh
Authors: Mujahid Abdullah Al , Alam Kazi Khairul , Razzaque S M Abdur , Khan Md Kamrul Ahsan , Hoque Mohammad Mahabubul , Moon Umme Taskia
Published: July 2024

Background: The decisions made by graduates affect the workforce planning for the healthcare delivery system and higher education programs. This study sought to evaluate the elements impacting the career choices of MBBS final year medical students, intern doctors, and recent graduates in Bangladesh.
Methods: This cross-sectional study was conducted from July 2022 to June 2023 after getting institutional ethical approval. It was conducted upon 640 respondents form conveniently selected six medical colleges of Bangladesh. After taking consent from the college authorities and respondents, data were collected by administering a self-administered semi-structured questionnaire from 300 students, 200 interns and 140 recent medical graduates. Data were analyzed by SPSS 24.0 and presented by tables and graphs. Convenience sampling technique was used for selection of the respondents and medical colleges.
Results: This study showed that, (85.7%) MBBS final year students, (67%) intern doctors and all  recent medical graduates wanted post-graduation qualification for their future career. On the other hand, (14.3%) MBBS final year students and (33%) intern doctors did not want post-graduation for their future career. The popular choice among respondents was physical medicine and rehabilitation (7.2%) as 1st choice and Ophthalmology (6.8%) as 2nd choice. After summing up all choices the overall first three ranked choices were Pediatrics, Pathology and Orthopaedic surgery. The leading reasons for selecting a future career were due to family influence (67.8%), influenced by practicing doctor (54.8%) and other senior medical students (53.1%). Majority of respondents expressed that they developed interest during enrolling in the subject in the respective field (mean score = 3.41 out of 5). Other contributing factors that influence respondents on choosing their future career due to high demanding career path (mean score = 3.36 out of 5) and availability of the course subject (mean score = 3.12 out of 5).
Conclusion: In this regard, the study stated that a variety of impacts and factors at various points in medical education may assist students and future doctors in selecting their career specialization in accordance with the requirements of the local healthcare delivery system.
BJME, Volume-15, Issue-02, July 2024: 27-35
AN ANALYSIS OF HIGHER ORDER THINKING SKILL (HOTS) IN MERDEKA CURRICULUM ENGLISH TEXTBOOK “PATHWAY TO ENGLISH” PUBLISHED BY ERLANGGA FOR GRADE X OF SENIOR HIGH SCHOOL
Authors: Arisman Arisman , Maisarah Ira , Yunita Wisma , Sujarwati Iis , Sofyan Dedi
Published: July 2024

Higher order thinking skills (HOTS) refer to the more advanced mental processes outlined in Anderson and Krathwohl's updated version of Bloom's taxonomy (2021), comprising analysis, evaluation, and creation.". This research aimed to investigate the composition of HOTS (Higher Order Thinking Skill) in language tasks and knowledge of the English textbook on titled “Pathway” To English For SMA/MA Grade X and to explain the dominant cognitive dimension used in this textbook. The design of this research was descriptive qualitative. This research is classified as a content analysis. A table checklist based on the cognitive domain of the revised Bloom’s taxonomy was the instrument of this research. The findings of the research indicate that for language skills, this book is more concerned with HOT than LOTS with the percentage of HOTS at 58,34% and LOTS at 41,66%.  The result showed The most dominant level of thinking skill of language skill in this book is analyze (C4), followed by apply (C3), remember (C1), create (C6), evaluate (C5), and understand (C2).  For knowledge, it can be concluded that the composition of the Higher Order Thinking Skill (HOTS) presented in the instruction question on the English Textbook is not lower than the Lower Order Thinking Skill (LOTS) with the percentage of HOTS at 20,83% and LOTS at 79,17%. The dominant composition is Apply (C3), followed by Remember (C1), Apply (C4), and Understand (C2).   The researcher concludes that for language skill and knowledge, the cognitive dimension of each instruction question is present in the imbalance portion. Based on the result, this book has followed the ministry of education regulation and mereka curriculum in providing HOTS material in the teaching and learning process for language skills and proving LOTS material for knowledge because grammar and vocabulary teach the basics of language. It is suggested for teachers who use this book to be innovative, and creative, even teachers can adapt from other sources in giving instruction to develop students’ critical thinking.
Dampak Model Pembelajaran Discovery Learning Terhadap Keterampilan Proses Sains Dan Hasil Belajar Kognitif Siswa Sekolah Dasar
Authors: Tamalene Asri S. , Jusuf Ridwan
Published: July 2024

Science learning in elementary schools is given to students to practice science process skills. Through science learning, students can produce a conceptual understanding of material through scientific work. This research aims to determine students' science process skills and cognitive learning outcomes through the Discovery Learning learning model in elementary schools. This research method is experimental research with a Posttest-Only Control Design. The results showed that the cognitive learning outcomes and skills of experimental class students were higher than those of control class students. Based on the results of the first hypothesis test, it was found that Fcount= 131.266 while Ftable= 3.44. This means FcountFtable and sig. = 0.05 so H0 is rejected and Ha is accepted. So it can be concluded that there are differences in cognitive learning outcomes between students who take part in learning using the discovery learning model and students who take part in conventional learning. The results of the second hypothesis test showed that the value of Fcount = 128.380 while Ftable = 3.44. This means FcountFtable and sig. = 0.05 so H0 is rejected and Ha is accepted. So it can be concluded that there are differences in science process skills between students who take part in learning using the discovery learning model and students who take part in conventional learning.
Remarks on Fixed Point Approaches to Insurance and Finance
Authors: Voutilainen Raimo
Published: July 2024

Fixed point theory has been applied to various practical problems of insurance and finance during several decades. In our earlier paper (Voutilainen, 2022) we have presented problem classes tackled in the literature by fixed point methods. In Voutilainen (2023) we study fixed point problem solution methods with the help of solutions of equilibrium problems in several classes. For this paper we have gathered and commented on some specific fixed point applications to the insurance and finance areas. Many of them also adopt other interesting theoretical areas. It turns out that fixed point theory really has a number of important applications both to insurance and finance and to theoretical mathematics.
ANALISIS FAKTOR USIA, PENDIDIKAN, PARITAS DAN JENIS PERSALINAN TERHADAP KEBERHASILAN INISIASI MENYUSU DINI (IMD)
Authors: Puspadewi Yuniar Angelia
Published: July 2024

Breasfeeding Early Initiation  is an activity of allowing a newborn baby to breastfeed immediately within the first hour of birth, along with contact between the baby's skin and the mother's skin. If IMD is not carried out in less than an hour or there is a fabric barrier between the baby's skin and the mother's skin so that they do not touch each other, then IMD is said to be imperfect. In Indonesia, this IMD policy has been socialized since August 2007. Nationally in 2021, the percentage of newborns within the first hour who have received IMD is 82.7%. The aim of this research is to determine the factors of age, education, parity and type of delivery on the success of IMD in TPMB Malang City. This type of research is quantitative with a cross sectional design. The total sample was 30 people who gave birth at TPMB or were referred to the hospital. Questionnaire was used to collect data. This research used chi-square test for bivariate and logistic regression for multivariate. The results  showed  a relationship between parity (p value 0.028 and OR 5.500) and delivery type (p value 0.040 and OR 9.333) on the success of IMD. There is no relationship between age (p value 0.674) and education (p value 1.000) on the success of IMD. The most influenced factor was the delivery type with an OR of 9.333, which means that normal birth had a success rate of IMD 9 times higher than those who give birth via caesarean section. Therefore, it is hoped that whatever type of birth will be carried out, you should still be able to carry out IMD.
Implementasi Strategi Koperasi Baitul Mall Wattamwi (K-BMT) Muamalah Syari’ah Dalam Mengatasi Pembiayaaan Bermasalah Akibat Covid-19
Authors: Nurul Nurul Hikmah , Ninik Azizah
Published: July 2024

Artikel ini membahas tentang bagaimana implementasi strategi Koperasi Baitul Mall Wattamwi (K-BMT) muamalah syariah dalam mengatasi pembiayaan bermasalah akibat covid-19. K-BMT muamalah merupakan sebuah lembaga keuangan suatu segmen dari bank syari’ah yang berfungsi seperti koperasi simpan pinjam syari’ah dengan pengistimewaan untuk ukuran yang kecil dan tidak memiliki keleluasaan ke pasar uang. Untuk merealisasikan sistem ekonomi berdasarkan syariat Islam guna meningkatkan kesejahteraan masyarakat yang ekonominya lemah. K-BMT muamalah syariah berperan dalam kemajuan ekonomi dengan mengalokasikan anggaran dalam aliran pengkreditan bagi individu atau badan usaha untuk mencukupi kebutuhan konsumsinya atau untuk mengoptimalkan produksinya. Mayoritas masyarakat Indonesia mengalami persoalan ekonomi karena adanya pandemi covid-19 yang terjadi di Indonesia yang menyebabkan terjadinya pembiayaan bermasalah dan terganggunya laju perekonomian masyarakat serta dapat mempengaruhi stabilitas keuangan pada K-BMT muamalah syariah.
 
Kata kunci: K-BMT Muamalah Syariah, pembiayaan bermasalah, covid-19
 
 
Abstract
 
This article discusses how the implementation of the baitul mall wattamwi cooperative (K-BMT) muamalah syariah strategy in overcoming problematic financing due to covid-19. K-BMT muamalah is a financial institution that is part of a shariah bank that operates like a shariah savings and loan cooperative with the exception of its small size and lack of access to the money market. To realize an economic system based on Islamic law to improve the welfare of economically weak people. K-BMT muamalah shari'ah plays a role in economic development by allocating funds in the form of credit for individuals or business entities to meet their consumption needs or to increase production. Most of the Indonesian people have economic difficulties due to the covid-19 virus that has occurred in Indonesia which has caused non-performing financing and disruption of the community's economic pace and can affect financial stability at K-BMT muamalah syari'ah.
Amine-reactive crosslinking enhances type 0 collagen hydrogel properties for regenerative medicine
Authors: Salthouse Daniel , Goulding Peter D. , Reay Sophie L. , Jackson Emma L. , Xu Chenlong , Ahmed Rochelle , Mearns-Spragg Andrew , Novakovic Katarina , Hilkens Catharien M. U. , Ferreira Ana Marina
Published: July 2024

Introduction

Collagen is extensively utilised in regenerative medicine due to its highly desirable properties. However, collagen is typically derived from mammalian sources, which poses several limitations, including high cost, potential risk of immunogenicity and transmission of infectious diseases, and ethical and religious constraints. Jellyfish-sourced type 0 collagen represents a safer and more environmentally sustainable alternative collagen source.

Methods

Thus, we investigated the potential of jellyfish collagen-based hydrogels, obtained from Rhizostoma pulmo (R. pulmo) jellyfish, to be utilised in regenerative medicine. A variety of R. pulmo collagen hydrogels (RpCol hydrogels) were formed by adding a range of chemical crosslinking agents and their physicochemical and biological properties were characterised to assess their suitability for regenerative medicine applications.

Results and Discussion

The characteristic chemical composition of RpCol was confirmed by Fourier-transform infrared spectroscopy (FTIR), and the degradation kinetics, morphological, and rheological properties of RpCol hydrogels were shown to be adaptable through the addition of specific chemical crosslinking agents. The endotoxin levels of RpCol were below the Food and Drug Administration (FDA) limit for medical devices, thus allowing the potential use of RpCol in vivo. 8-arm polyethylene glycol succinimidyl carboxyl methyl ester (PEG-SCM)-crosslinked RpCol hydrogels preserved the viability and induced a significant increase in the metabolic activity of immortalised human mesenchymal stem/stromal cells (TERT-hMSCs), therefore demonstrating their potential to be utilised in a wide range of regenerative medicine applications.
Device-enabled neighborhood-slot allocation for the edge-oriented Internet of Things
Authors: Khan Rahim , Khan Mushtaq , Shah Nadir , Al-Rasheed Amal , Khan Aftab Ahmad
Published: July 2024

Internet of Things (IoT) has become an interesting research domain as numerous devices, preferably equipped with sensors, communication, and actuator modules, are deployed to capture real-time data in the different application areas, such as smart healthcare and industries. These devices have the built-in capacity to directly interact with the physical phenomenon and report any unusual situation within their respective coverage areas, i.e., monitoring a critical patient in the smart hospital but direct communication with a common destination module is not guaranteed and could possibly be very challenging if two or more devices, preferably those in closed proximity, are interested to transmit simultaneously. Therefore, in this manuscript, we are going to present a hybrid slot allocation approach, which is specifically designed for those devices resided in neighborhood and are eager to communication concurrently with a common destination device, i.e., server. In the beginning, the k-mean clustering algorithm is used to group these devices into clusters where server is forced to collect data from devices deployed in the respective coverage areas. Thus, every server generates dedicated slots for active devices and an additional slot for server(s). Similarly, the proposed neighborhood-enabled time division multiple access (TDMA) has the flexibility of assigning multiple slots to a requesting device if available, which is needed in scenarios, such as detection of pest in the field. Additionally, a member device is allowed to migrate (if needed and possible) from one server's coverage region to another. Simulation results confirmed that the proposed approach is better than the existing algorithms (opportunistic TDMA, hybrid TDMA, and non-orthogonal multiple access), particularly in terms of bandwidth, end-to-end delay, and empty slot utilization. The proposed scheme has improved bandwidth and empty slot utilization, which are approximately 15% and 12%, respectively, whereas it has achieved approximately 94.89% utilization of the available slots which was previously 93.4%.
The clinical characteristics analysis of serum markers for the cardiovascular system in early-stage COVID-19 patients
Authors: Cao Xi , Xie Yong-Li , Yi Jian-ying , Liu Zhi-li , Zhang Dong-dong , Yue Ying-ying , Li Tian-ning , Zhou Chun-lei , Mu Hong
Published: July 2024

Background

This study aimed to investigate alterations in serum markers [creatine kinase-MB (CKMB), cardiac troponin T (cTnT), myoglobin (Myo), B-type natriuretic peptide (BNP), D-dimer (DD), procalcitonin (PCT) and interleukin-6 (IL6)] in early Omicron variant infection and analyzed their correlation with clinical parameters.

Methods

Retrospective analysis of 1,138 mild/asymptomatic cases at Tianjin First Central Hospital, including age, gender, serum markers and nucleic acid test results. Statistical analysis used SPSS software, version 24.0.

Results

Elevated cTnT, BNP (125–400), and DD (0.55–1.10) levels were prevalent at 12.92%, 15.64%, and 14.50%, respectively. Females had significantly higher proportions with slightly elevated BNP (19.34%) and DD (19.69%) levels. Patients over 35 had a higher proportion of slight elevation in BNP (20.00%). Abnormal levels of serum markers were significantly associated with older age, increased PCT and IL6 levels, as well as delayed nucleic acid clearance. Additionally, levels of immunoglobulin G (IgG) were notably reduced in these cases. Patients with prolonged nucleic acid clearance (>14 days) had higher BNP and DD levels upon admission. Logistic regression identified PCT (OR = 237.95) as the most significant risk factor for abnormal serum markers for cardiovascular system injury.

Conclusion

Early Omicron infection might do subclinical damage to the cardiovascular system. Elevated cTnT, BNP and DD levels were correlated with age, gender, inflammatory factors, and IgG. Notably, high PCT level emerged as the most robust predictor of abnormal serum biomarkers.
Genetic testing for familial hypercholesterolemia in a Finnish cohort of patients with premature coronary artery disease and elevated LDL-C levels
Authors: Jokiniitty Antti , Eskola Markku , Metso Saara , Bogsrud Martin , Huhtala Heini , Saarela Tanja
Published: July 2024

Background

Based on Finnish LDLR-founder variations, the prevalence of familial hypercholesterolemia (FH) in Finland is estimated to be at least 1:600. Patients with FH have increased risk of premature coronary artery disease (CAD) and thus the prevalence of FH is expected to be higher in this subgroup.

Objective

To assess the prevalence of monogenic FH in a Finnish cohort of patients with premature CAD and elevated low-density lipoprotein cholesterol (LDL-C) levels.

Methods

Among 28,295 patients undergoing angiography at Heart Hospital at Tampere University Hospital between 2007 and 2017, we identified 162 patients diagnosed with premature CAD (men aged <55 years and women aged <60 years) and history of high LDL-C (≥5 mmol/L) levels without secondary causes of hypercholesterolemia. Clinical probability of FH was estimated, and genetic testing of FH was carried out in 80 patients with informed consent.

Results

Of the 80 patients with premature CAD and history of high LDL-C levels, 70% were men; the age at diagnosis of CAD for male and female patients was 48 and 53 years, respectively. In total, 58 (73%) patients had probable (n = 54) or definite (n = 4) FH based on Dutch Lipid Clinic Network criteria. A pathogenic variant of FH was found in five (6%) patients. Prevalence of the genetically verified FH was 1:16. The FH variant was found in 75% of patients with definite FH.

Conclusions

The prevalence of genetically verified FH was 1:16 among patients with premature CAD and elevated LDL-C level, which is 38 times higher than the estimated prevalence of 1:600 in the general Finnish population.
Relationship between caries indexes and obesity in a sample of Puerto Rican adolescents
Authors: Lopez del Valle Lydia M. , Nieves-Plaza Mariely , Rivas-Tumanyan Sona , Hanke-Herrero Rosana
Published: July 2024

Background

Obesity and caries have become increasingly prevalent. As of yet, research results on the relationship between obesity and caries in children and adolescents have been inconclusive. This study aimed to evaluate the association between caries and obesity in adolescents.

Methods

This was a cross-sectional study of a convenience sample of 187 Puerto Rican adolescents aged 13–19 years, attending, among them, five high schools. Each participant received dental exams for caries using the criteria of the International Caries Detection and Assessment System (ICDAS), had his or her body mass index (BMI) determined, and took a 19-item risk factor questionnaire. The Significant Caries (SiC) index (for DMFT) was calculated to compare obese and healthy adolescents. Statistical analysis was performed using descriptive and inferential statistics.

Results

Nearly 60% of the sample population was female, with a mean age of 15.7 (±1.25). The mean BMI percentile was 72.24 (±28.78); 48.66% of the participants had a healthy weight, 19.79% were overweight, and 30.48% were obese. Dental caries was observed in 68% of the participants; the mean caries index D3-6MFS was 5.17(±5.92) and the mean D3-6MFT was 3.59 (±3.97). No significant differences were found between caries indexes and obesity status (P > 0.05). The median (p25, p75) SiC index among overweight/obese adolescents was 9.5 (7, 12), whereas for healthy weight/underweight participants was 7 (5, 8) (p < 0.005).

Conclusions

Based on the limited number of participants, no association was found between dental caries (D3-6MFS and D3-6MFT) and obesity (BMI) among adolescents.
Light-absorbing capacity of volcanic dust from Iceland and Chile
Authors: Koivusalo Taru F. A. , Dagsson-Waldhauserová Pavla , Gritsevich Maria , Peltoniemi Jouni
Published: July 2024

It is increasingly recognized that light-absorbing impurities (LAI) deposited on snow and ice affect their albedo and facilitate melting processes leading to various feedback loops, such as the ice albedo feedback mechanism. Black carbon (BC) is often considered the most important LAI, but some areas can be more impacted by high dust emissions. Iceland is one of the most important high latitude sources for the Arctic due to high emissions and the volcanic nature of the dust. We studied optical properties of volcanic dust from Iceland and Chile to understand how it interacts with the Sun’s radiation and affects areas of deposition as LAI. Optical properties of dust samples were measured at the laboratory of the Finnish Geospatial Research Institute (FGI) using the latest setup of the FGI’s goniospectrometer. We found that, depending on the particle size, the albedo of dry volcanic dust on the visible spectrum is as low as 0.03, similar to that of BC, and the albedo decreases with increasing particle size. Wet dust reduces its albedo by 66% compared to dry sample. This supports the comparability of their albedo reducing effects to BC as LAIs, and highlights their significant role in albedo reduction of snow and ice areas. The potential use of the results from our measurements is diverse, including their use as a ground truth reference for Earth Observation and remote sensing studies, estimating climate change over time, as well as measuring other ecological effects caused by changes in atmospheric composition or land cover.
An L1-and-L2-regularized nonnegative tensor factorization for power load monitoring data imputation
Authors: Luo Xing , Hu Zijian , Ma Zhoujun , Lv Zhan , Wang Qu , Zeng Aoling
Published: July 2024

As smart grid advance, Power Load Forecasting (PLF) has become a research hotspot. As the foundation of the forecasting model, the Power Load Monitoring (PLM) data takes on great importance due to its completeness, reliability and accuracy. However, monitoring equipment failures, transmission channel congestion and anomalies result in missing PLM data, which directly affects the performance of the PLF model. To address this issue, this paper proposes an L1-and-L2-Regularized Nonnegative Tensor Factorization (LNTF) model to impute PLM missing data. Its main idea is threefold: (1) combining L1 and L2 norms to achieve effective feature extraction and improve the model’s robustness; (2) incorporating two temporal-dependent linear biases to describe the fluctuations of PLM data; (3) adding nonnegative constraints to precisely define the nonnegativity of PLM data. Extensive empirical studies on two publicly real-world PLM datasets with 1,569,491 and 413,357 known entries and missing rates of 93.35% and 96.75% demonstrate that the proposed LNTF improves 14.04%, 59.31%, and 71.43% on average over the state-of-the-art imputation models in terms of imputation error, convergence rounds, and time cos, respectively. Its high computational efficiency and low imputation error make practical sense for PLM data imputation.
Ecological niche modelling: a global assessment based on bibliometric analysis
Authors: Javeed Banafsha , Ridwan Qamer , Huang Delin , Wani Zishan Ahmad , Siddiqui Sazada , Yassin Habab Merghani , Othman Gehan Ahmed Mohamed
Published: July 2024

In the present study, a bibliometric analysis of the published literature on Ecological Niche Modelling (ENM) topic from 1992 to 2023 was carried out using Web of Science (WoS) as a data source. Analysis of the data was carried out using bibliometrix tool in R software. Additionally, VOS Viewer software was used to provide visualization of the bibliometric analysis through network maps. The results of the study revealed that a total of 3, 595 scholarly documents in the English language were published on ENM from 1992–2023, originating from 564 sources. Furthermore, a significant increase in publications was observed over the years. A total of 13,122 authors have contributed to the field, with “Peterson AT” from the University of Kansas being the most prolific author. Journal of Biogeography emerges as the most relevant source with 290 documents published, while Ecography as the most cited source with 8,485 citations. Collaboration analysis revealed that only 109 documents were single-authored, with an average of 5.07 co-authors per document and an international co-authorship rate of 50.96%. Additionally, our analysis shows that the USA leads in Multiple Country Publications (MCP). The development of sophisticated software tools and algorithms coupled with remote sensing data has democratized ENM research, enabling scientists from diverse backgrounds to contribute to the field’s growth. However, like any other model ENMs have some limitations and thus the entire procedure used to create an ENM must be reliable, transparent, and repeatable in order for it to be used effectively in conservation, management and decision-making.
Application of GM (1,1) to predict the dynamics of stand carbon storage in Pinus Kesiya var. langbianensis natural forests
Authors: Gu Chunxi , Zhou Zhenyan , Liu Chang , Zhang Wangfei , Yang Zhengdao , Zhou Wenwu , Ou Guanglong
Published: July 2024

Amid global carbon reduction and climate action, precise forest carbon storage estimation is crucial for comprehending the carbon cycle. This study forecasts P. kesiya var. langbianensis forests’ 2030 stand carbon storage using data from 81 permanent plots across three Yunnan Province forest surveys and remote sensing. Findings: (1) In 2000, storage ranged from 26 to 38 t·hm−2. Central areas had higher values; southwest and southeast exceeded northwest and northeast. By 2010, storage grew eastward, receded northward. By 2020, east storage declined, southwest rose. (2) GM (1,1) model: posterior difference C 0.001, R2 power function model 0.945, GM (1,1) p value 0.999, power function model p value 0.997. (3) Predictions: Cosivarang border forest’s 2030 carbon stock 2850.804 t·hm−2, up 103.463 t·hm−2 from 2000. At 2022’s certified Emission Reduction carbon price of 60 yuan/ton, 2030’s carbon asset value per unit (t·hm−2) approx. 6207.78 Yuan, compared to 2000. Integrating gray system theory, especially GM (1,1) model, robustly addresses “small data and uncertainty” system challenges. Introducing GM (1,1) gray theory in forestry research offers fresh insight into forest carbon sink dynamics.
GWSM4C-NS: improving the performance of GWSM4C in nearshore sea areas
Authors: Zhang He , Jin Quan , Hua Feng , Wang Zeyu
Published: July 2024

Predicting nearshore significant wave heights (SWHs) with high accuracy is of great importance for coastal engineering activities, marine and coastal resource studies, and related operations. In recent years, the prediction of SWHs in two-dimensional fields based on deep learning has been gradually emerging. However, predictions for nearshore areas still suffer from insufficient resolution and poor accuracy. This paper develops a NS (NearShore) model based on the GWSM4C model (Global Wave Surrogate Model for Climate simulations). In the training area, the GWSM4C -NS model achieved a correlation coefficient (CC) of 0.977, with a spatial Root Mean Square Error (RMSE), annual mean spatial relative error (MAPE), and annual mean spatial absolute error (MAE) of 0.128 m, 10.7%, and 0.103 m, respectively. Compared to the GWSM4C model’s predictions, the RMSE and MAE decreased by 59% and 60% respectively, demonstrating the model’s effectiveness in enhancing nearshore SWH predictions. Additionally, applying this model to untrained sea areas to further validate its learning capability in wave energy propagation resulted in a CC of 0.951, with RMSE, MAPE, and MAE of 0.161m, 12.9%, and 0.137m, respectively. The RMSE and MAE were 43% and 39% lower than the GWSM4C model’s interpolated predictions. The results shown above suggest that the newly proposed model can effectively improve the performance of GWSM4C in nearshore areas.