bluuebunny/crossref_metadata_2025 huggingface dataset:
Das Gruppenklima in der Heimerziehung. Eine empirische Untersuchung in Nord- und Mittelhessen
Authors: von Langsdorff Nicole
Published: December 2023

Die Bedeutung von Gruppenprozessen und -klima in der Heimerziehung nimmt aktuell nur wenig Raum in den Fachdiskursen der Kinder- und Jugendhilfe ein. Die Autorin beleuchtet das soziale Klima in der stationären Unterbringung aus der Perspektive von Kindern und Jugendlichen. Für die Praxis der Heimerziehung werden Handlungsperspektiven für die Einzel- und Gruppenarbeit in Heimen und Wohngruppen entwickelt.
Approximation of Dirichlet-to-Neumann operator for a planar thin layer and stabilization in the framework of couple stress elasticity with voids
Authors: Abdallaoui Athmane , Kelleche Abdelkarim
Published: December 2023

In this paper, we start from a two dimensional transmission model problem in the framework of couple stress elasticity with voids which is defined in a fixed domain Ω − juxtaposed with a planar thin layer Ω + δ . We first derive a first approximation of Dirichlet-to-Neumann operator for the thin layer Ω + δ by using the techniques of asymptotic expansion with scaling, which allows us to approximate the transmission problem by a boundary value problem doesn’t take into account any more the thin layer Ω + δ , called approximate impedance problem; after that, we prove an error estimate between the solution of the transmission problem and the solution of the approximate impedance problem.
Modulation of the capillary leakage by exogenous albumin in a rat model of endothelial glycocalyx damage
Authors: Astapenko David , Zrzavecky Marek , Gorskaja Diana , Hyspler Radomir , Ticha Alena , Radochova Vera , Lehmann Christian , Malbrain Manu L.N.G. , Cerny Vladimir , Hahn Robert G.
Published: December 2023

BACKGROUND:

Endothelial glycocalyx (EG) plays a crucial role in maintaining the plasma proteins within the intravascular space.

OBJECTIVE:

We studied whether exogenous albumin protects the EG in an experimental model of EG enzymatic damage in rats.

METHODS:

Rats were divided into three groups of 10 animals that received (1) Evans blue (2) Evans blue + hyaluronidase, or (3) Evans blue + hyaluronidase + 20% human albumin via the tail vein. Spectrophotometric analysis was performed 2 h later to quantify the leakage of Evans blue-labeled albumin into the heart, lungs, brain, kidneys, liver, small intestine, spleen, and skeletal muscle.

RESULTS:

Administration of hyaluronidase numerically increased the capillary leakage of Evans blue in all examined tissues. Co-administration of albumin decreased the leakage of albumin in all tissues except the heart. In the lungs, the ratio between the absorbance and dry organ weight decreased from 5.3 ± 2.4 to 1.7 ± 0.5 (mean ± SD) ( P < 0.002), and in the liver, the absorbance decreased from 2.2 ± 0.7 to 1.5 ± 0.4 ( P < 0.011).

CONCLUSION:

Exogenous albumin decreased the capillary leakage of albumin which was interpreted as a sign of maintained EG integrity.
A bibliometric review of job satisfaction and organizational commitment in businesses area literatures
Authors: Abu Orabi Tareq , Al-Hyari Hadeel Sa’ad Muhammed , Almomani Hanan Mohammad , Ababne Ahmad , Abu Huson Yazan , Ahmed Emad , Albanna Hussein
Published: December 2023

BACKGROUND: The bibliometric analysis and systematic appraisal of research on job satisfaction and organizational commitment in administrative and technical studies in the study show substantial efficacy, opening the path for future research in this subject. OBJECTIVE: The goal of this literature review is to identify important ideas that have the potential to influence job satisfaction and organizational commitment, as well as to provide the groundwork for future research in this field using bibliometric analysis. METHODS: This study used a bibliometric review approach to examine Web of Science papers on job satisfaction and organizational commitment. RESULTS: Performance, Impact, Transformational Leadership, Citizenship Behavior, Employee Performance, Organizational Justice, Job Satisfaction, Turnover, Psychological Empowerment, Organizational Commitment, Normative Commitment, Empowerment, and Turnover Intentions were the most frequently used terms in research on job satisfaction and organizational commitment, according to the survey. The bulk of these publications were published in the United States, China, Turkey, South Korea, Canada, Indonesia, Pakistan, Taiwan, and Jordan. IMPLICATIONS: The findings of the research may be used to generate articles on work satisfaction and organizational commitment in the field of market discipline, notably in the domains of business and technology.
Lung cancer detection using RF-K-means and classification with optimized ANN algorithm
Authors: Kalaipriya O. , Dhandapani S.
Published: December 2023

Lung cancer is one of the leading causes of mortality from cancer. Lung cancer is a kind of malignant lung tumor characterized by uncontrolled cell proliferation in lung tissues. Even though CT scans are the most often used imaging technology in medicine, clinicians find it challenging to interpret and diagnose cancer from CT scan pictures. As a result, computer-aided diagnostics can assist clinicians in precisely identifying malignant cells. Many computer-aided approaches were explored and applied, including image processing and machine learning. A comparison of the various classification methodologies will assist in enhancing the accuracy of lung cancer detection systems that employ robust segmentation and classification algorithms presented in this research. This research proposed to enhance existing segmentation and classification-basedmethodsof human lung cancer detection with optimization in techniques. The workflow includes initial preprocessing of medical images, for segmentation a novel hybrid methodology is developed by combining enhanced k-means clustering and random forest and classification with an Artificial neural network enhanced with PSO parameter and feature optimization.
Identifying neonatal intensive care (NICU) admissions using administrative claims data
Authors: Vance A.J. , Bell S. , Tilea A. , Beck D. , Tabb K.M. , Zivin K.
Published: December 2023

BACKGROUND:

To define a method for identifying neonatal intensive care unit (NICU) admissions using administrative claims data.

METHODS:

This was a retrospective cohort study using claims from Optum’s de-identified Clinformatics® Data Mart Database (CDM) from 2016 –2020. We developed a definition to identify NICU admissions using a list of codes from the International Classification of Diseases, 10 th Revision, Clinical Modification (ICD-10-CM), Current Procedural Terminology (CPT), and revenue codes frequently associated with NICU admissions. We compared agreement between codes using Kappa statistics and calculated positive predictive values (PPV) and 95% confidence intervals (CI).

RESULTS:

On average, revenue codes (3.3%) alone identified more NICU hospitalizations compared to CPT codes alone (1.5%), whereas the use of CPT and revenue (8.9%) and CPT or revenue codes (13.7%) captured the most NICU hospitalizations, which aligns with rates of preterm birth. Gestational age alone (4.2%) and birthweight codes alone (2.0%) identified the least number of potential NICU hospitalizations. Setting CPT codes as the standard and revenue codes as the “test,”, revenue codes resulted in identifying 86% of NICU admissions (sensitivity) and 97% of non-NICU admissions (specificity).

CONCLUSIONS:

Using administrative data, we developed a robust definition for identifying neonatal admissions. The identified definition of NICU codes is easily adaptable, repeatable, and flexible for use in other datasets.
A rare case of hepatic sinusoidal occlusive syndrome in a premature neonate with trisomy 21
Authors: Alenchery A.J. , Yeaney N.K. , Chen C.B. , Talati R. , Vogelius E. , Tan C. , Radhakrishnan K.
Published: December 2023

Trisomy 21 (Down Syndrome) may lead to multiple hematological and hepatobiliary manifestations including the development of transient abnormal myelopoiesis. While many cases resolve, transient abnormal myelopoiesis may lead to significant morbidity and mortality in a small percentage of patients. This condition may present a diagnostic challenge for physicians and currently there is only limited data on effective treatments, particularly with low blast percent transient abnormal myelopoiesis. We present a case of a neonate with trisomy 21 and multiple congenital anomalies who consequently developed hepatic failure with evidence of non-cirrhotic portal hypertension likely due to transient abnormal myelopoiesis. This clinical scenario highlights the need for additional evaluation for transient abnormal myelopoiesis associated hepatic disorder and possibly hepatic sinusoidal occlusive syndrome among trisomy 21 neonates particularly with low blast percentage.
Causes of death among people with myelomeningocele: A multi-institutional 47-year retrospective study
Authors: Szymanski Konrad M. , Adams Cyrus M. , Alkawaldeh Mohammad Y. , Austin Paul F. , Bowman Robin M. , Castillo Heidi , Castillo Jonathan , Chu David I. , Estrada Carlos R. , Fascelli Michele , Frimberger Dominic C. , Gargollo Patricio C. , Hamdan Dawud G. , Hecht Sarah L. , Hopson Betsy , Husmann Douglas A. , Jacobs Micah A. , MacNeily Andrew E. , McLeod Daryl J. , Metcalfe Peter D. , Meyer Theresa , Misseri Rosalia , O’Neil Joseph , Rensing Adam J. , Routh Jonathan C. , Rove Kyle O. , Sawin Kathleen J. , Schlomer Bruce J. , Shamblin Isaac , Sherlock Rebecca L. , Slobodov Gennady , Stout Jennifer , Tanaka Stacy T. , Weiss Dana A. , Wiener John S. , Wood Hadley M. , Yerkes Elizabeth B. , Blount Jeffrey
Published: December 2023

PURPOSE: This study aimed to analyze organ system-based causes and non-organ system-based mechanisms of death (COD, MOD) in people with myelomeningocele (MMC), comparing urological to other COD. METHODS: A retrospective review was performed of 16 institutions in Canada/United States of non-random convenience sample of people with MMC (born > = 1972) using non-parametric statistics. RESULTS: Of 293 deaths (89% shunted hydrocephalus), 12% occurred in infancy, 35% in childhood, and 53% in adulthood (documented COD: 74%). For 261 shunted individuals, leading COD were neurological (21%) and pulmonary (17%), and leading MOD were infections (34%, including shunt infections: 4%) and non-infectious shunt malfunctions (14%). For 32 unshunted individuals, leading COD were pulmonary (34%) and cardiovascular (13%), and leading MOD were infections (38%) and non-infectious pulmonary (16%). COD and MOD varied by shunt status and age (p < = 0.04), not ambulation or birthyear (p > = 0.16). Urology-related deaths (urosepsis, renal failure, hematuria, bladder perforation/cancer: 10%) were more likely in females (p = 0.01), independent of age, shunt, or ambulatory status (p > = 0.40). COD/MOD were independent of bladder augmentation (p = >0.11). Unexplained deaths while asleep (4%) were independent of age, shunt status, and epilepsy (p >= 0.47). CONCLUSION: COD varied by shunt status. Leading MOD were infectious. Urology-related deaths (10%) were independent of shunt status; 26% of COD were unknown. Life-long multidisciplinary care and accurate mortality documentation are needed.
100 Years since Robert Barany’s visit to the Zaragoza medical faculty
Authors: Cisneros-Gimeno A.I. , Garcia-Barrios A. , Fraile J. , Alarcia E. , Whyte J.
Published: December 2023

In December 1923, a twelve-day course took place at the University of Zaragoza, specifically at the Faculty of Medicine, given by Professor Róbert Bárány, who was awarded the Nobel Prize for Medicine in 1914 for his discoveries on the vestibular apparatus. Professor Robert Bárány came to the faculty at the invitation of Professor Victor Fairén through the University Exchange programme. This course consisted of four lectures and twelve lessons a day in which he presented his knowledge of the physiopathology of the vestibule and cerebellum, as well as practical demonstrations of the physical examination of nystagmus and cerebellar pathology. Lorente de Nó, a doctorate student of medicine, was one of the most outstanding students on the course. His intellect was already outstanding in those years, which helped him to discuss the physiopathology of nystagmus with Professor Bárány. The relationship he forged with the Nobel laureate in Zaragoza would be decisive for his future as a researcher. The aim of this work is to compile and integrate the available information on the course that Professor Bárány took in the city of Zaragoza, consulting official documents from the university and the city, articles, books and the press of the time.
Environmental aspects of using artificial photosynthesis technology for environmental decarbonization
Authors: Тykhenko Оksana M. , Deineka Karina S.
Published: December 2023

The increasing levels of carbon dioxide (CO2) in the atmosphere have been recognized as a major contributor to global climate change. As a result, there is a pressing need to develop sustainable and eco-friendly methods for mitigating CO2 emissions. CO2 recycling has emerged as a promising solution, aiming to convert CO2 into valuable products while reducing its impact on the environment. This work uses the CO2 recycling approach, which involves the conversion of CO2 emissions into useful organic compounds. An experiment with artificial photosynthesis is carried out with the help of a special installation, where CO2 undergoes photochemical reactions that contribute to the formation of organic compounds. Photocatalytic conversion of CO2 is environmentally friendly as it uses light energy and renewable raw materials to produce valuable chemicals without producing harmful by-products or waste. It has been established that TiO2 in the form of anatase and rutile is the most common CO2 photocatalyst. As a result of the experiment, the main output products were methanol, acetate aldehyde and acetone. The use of ultraviolet radiation and an electric field significantly affected the synthesis of organic substances and their quantity. It can be used in various industries such as fuel, chemical and pharmaceutical industries. In particular, methanol, acetate aldehyde and acetone are promising substances for the use and production of biofuels.
Bilingualism’s Influence on Individual’s Cultural Perceptions
Authors: Castro Sebastián
Published: December 2023

This study aims to investigate the link between bilingualism, identity development, and language development is examined in this research study. It underlines the contrast between bilingualism and language acquisition and defines bilingualism as the usage of two languages within a linguistic community. The investigation of early and late bilingualism looks at how culture affects bilingualism. Additionally, it explores the idea of identity, taking linguistic and cultural ties into account. The study uses a case study design and a qualitative methodology with bilingual subjects. To collect data on language origins and cultural impressions, surveys and interviews are used. The study focuses on language development, responsibilities in the household and at school, and the cultural and linguistic identities of the participants. The purpose of the study is to comprehend how culture affects identity development, language learning, and bilingualism. In general, it advances knowledge of the complexity of bilingualism and its effects on both persons and societies.
МЕТОД ПРОЕКТУВАЛЬНОГО РОЗРАХУНКУ НА МІЦНІСТЬ ПОПЕРЕЧНОГО СТИКУ ПАНЕЛЕЙ ВІД'ЄМНОЇ ЧАСТИНИ КРИЛА ТА ЦЕНТРОПЛАНА ТРАНСПОРТНОГО ЛІТАКА
Authors: Yifang Sun , Василевский В. Є. , Вендін О. О. , Гребеніков О. Г.
Published: December 2023

Due to the limitation in the dimensions of the structural elements of the modeled wing contour and the possibility of increasing their cross-sections in the area of the transverse joint, only on the inside, there is a need to find an effective solution for the design, mass of the joint, as well as its statical strength at the modeling stage. The article presents the method and its application using the example of a preliminary analysis of the design calculation of the design of the flange connection of the center section with the outer wing section (OWS) of a transport aircraft. The method is based on the calculation of stresses caused by the discrete transmission of forces between elements. In the calculation method, a simplified statically indeterminate joint model is obtained according to the geometric characteristics and force transmission characteristics of each node section in the flange joint structure. During the calculations, the following are determined: diagrams of the bending moment and axial forces obtained using the force method, the distribution of force loads in each section of the model for subsequent analysis of the static safety factor. The resulting calculation results are compared with the airworthiness requirements to determine whether they meet the design requirements. For components with greater static strength, or those that do not meet the requirements, it is recommended to further modify the design parameters to ensure an effective design of the center section joint with the outer wing section and subsequent re-calculation. The calculation method used has practical value as a preliminary engineering analysis.The geometric characteristics of the junction of the center section with the negative part of the wing were modeled using the CAD/CAMCAE CATIA system.
Daily life of the students and teaching corporation of Kyiv higher educational institutions in the years of the First World War: increasing abuse of authority
Authors:   Taras Shevchenko National University of Kyiv, Chutkyi Аndrii
Published: December 2023

The purpose of the study is to investigate the changes in the situation in Kyiv higher education during the First World War as one of the indicators of the approaching collapse of the Russian Empire. The obtained results can be used to analyze the current situation in the Russian-Ukrainian war. It is planned to do this by showing the subsequent position of higher education and especially studentship in the politics of the Russian Empire in 1914 – at the begin- ning of 1917. Th e research methodology is based on general and special scientifi c methods, in particular: structural-systemic, comparative-historical, problem-chronological and historical- typological, etc. Th e principles of research are objectivity and scientifi city. Th e scientifi c novelty lies in the identifi cation of the approaching collapse of the Russian Empire in the First World War (cuts in higher education funding, complete subordination of educational institutions to the interests of the military due to their compulsion to evacuate and mobilize students), which have not previously been analyzed in this context. Conclusions. It is proved that the higher school oc- cupied a secondary position in the politics of the Russian Empire, as this state neglected the fi eld of education and considered students a revolutionary element. Therefore, under the conditions of the war, this branch was cut in funding and completely subordinated to the will of the military, and the student body underwent forced mobilizations. All this undermined the development of higher education (and subsequently deprived the empire of necessary specialists) and at the same time contributed to an even greater revolutionization of studentship. At the same time, the growth of anti-government sentiments in higher education was a “bell” for corresponding changes in the sentiments of the entire society and indicated the approaching collapse of the Russian Empire. Th is was signaled by its attempts to make up for military losses at the expense of mobilized students and its inability to fi nancially support a higher school. Since at the present stage, the heiress of that empire pursues the same policy, it allows us to assume that the fate of modern Russia is similar to the fate of the Russian Empire at the end of the First World War.
Perbandingan Ketelitian Koordinat 3-D Antara Hasil Pengolahan Data GNSS Menggunakan Perangkat Lunak Hi-Target Geomatics Office dengan Trimble Business Center
Authors: Wijonarko Wijonarko , Kuncoro Henri
Published: December 2023

The Global Positioning System (GPS) data processing method is a key to obtaining the accuracy of the 3-D coordinates. Therefore, there is commercial software issued by tool vendors and can be accessed by users. Among the software are Hi-Target Geomatics Office (HGO) and Trimble Business Center (TBC). Both of these software can be used to process GPS data by post-processing and can be accessed by users. In this study, a comparison of the results of GPS data processing using the two software will be carried out by comparing the accuracy of each software for processing GPS data at baseline of 5 â€“ 10 m and 5 â€“ 20 km. The results of data processing that was carried out in this study found that GPS data processing using both software at a baseline of 5 â€“ 10 m did not show significant differences with the two having a difference of 1 mm in each coordinate component. However, at 5 â€“ 20 km baseline the results of GPS data processing using TBC are more accurate with a difference of -0.0050 m in Northing, -0.0800 m in Easting and -0.0550 m in Elevation compared to the actual coordinates. With these results, the TBC software is more recommended.
Efektivitas Ferrofluid dalam Penurunan Parameter Limbah Laundri
Authors: Ega Bernadheta Donabella , Hendrasarie Novirina
Published: December 2023

One of the new applications of ferrofluid, a colloidal compound containing magnetic nanoparticles, is the removal of microplastics from water. Laundry waste has a high concentration of microplastics, but this wastewater contains other substances besides microplastics, such as TSS, COD, surfactants, etc. Therefore, it is necessary to analyze the effectiveness of this method directly from wastewater to determine the total amount. The following is the highest percentage reduction obtained for each parameter: microplastic content of 66.16% is reduced. Then for the TSS parameter, ferrofluid reduces TSS by 70%. As for TDS, the ferrofluid method has the highest percentage reduction of 50.3%. Furthermore, for surfactants or detergents, the highest decrease in ferrofluid was only 10.37%. Lastly, in COD, the biggest decline reached 30%.
Optimasi Rasio Refluks Kolom Distilasi terhadap Kemurnian Distilat dan Kebutuhan Energi Proses (incomplete)
Authors: Fitriah Fitriah , Agustina Sari Dessy
Published: December 2023

Artikel ini tidak direvisi oleh penulisnya dan penulisnya tidak melakukan proses pencabutan artikel secara benar.
Perbandingan Mutu Air di Bendungan yang Berada di Provinsi Jawa Timur
Authors: Wardhani Eka , Irmansyah Athaya Zahrani , Oktaviani Syania Budi , Rindiantika Aulia Ulfie
Published: December 2023

A dam is a body of water that is relied upon in raw water supply. Many dams have deteriorated due to human activities in their catchment areas. East Java Province Government is currently trying to improve the function of the dam as a water reserve in the dry season. This study aims to compare water quality in nine dams located in East Java Province. The Telaga Pasir and Gonggang Dams are in Magetan Regency. The Notopuro, Saradan, Kedung Brubus, and Dawuhan dams are in Madiun Regency. Kedung Bendo, Pondok, and Sangiran dams are in Ngawi Regency. The method for determining water quality is based on KepMenLH No 115/2003 concerning guidelines for determining water quality status. Water sampling was carried out on January 24 to February 7, 2022, representing the dry season by grab sampling. Water samples were taken from the part of the dam with a pool of water. The results showed that the water quality of all dams was categorized as good to slightly polluted, with index values ranging from 0.80 to 3.10. The cause of water quality being lightly polluted is the BOD, COD, Free Chlorine, Arsenic, Cadmium, Copper, Ammonia, and Nitrite, which do not meet quality standards. The presence of these parameters is predicted to originate from the activities of residents around the catchment area, such as settlements and agriculture.
Implementasi Metode House Of Risk Pada Evaluasi Keterlambatan Proyek Cable Tray Support di PT.SSS
Authors: Fauzi Muhammad Dany , Salim Dahda Said
Published: December 2023

PT SSS is a company in the field of steel construction. In the Cable Tray Support project, delays occurred that affected the duration outside the contract. Projects have cost, quality, and time objectives that must be achieved. It requires good management of finance, equipment, materials, labor, and time. Therefore, project management is critical to the smoothness and success of the project. This research aims to identify delay problems through the House of Risk method, which analyzes risks, causative agents of delay, and mitigation strategies. There are 18 risks of delay with 21 causes identified, resulting in ten prioritized strategies, namely applying the material requirement planning method to find out more details of the lead time of each material, buying a lot at a lower price, looking for suppliers closer, overestimating the procurement index of certain types of materials, conducting strict and structured supervision to ensure the supply of appropriate goods from suppliers, evaluating the causes of delays and applying new methods to plan the arrival of materials, making a checklist of design drawings that have / have not been sent, making procedures for making and changing designs, updating the material list to facilitate material selection, improving coordination between consultants and field workers so that the design drawings can be said to be valid.
Community Satisfaction with the SEPEKAN System at Bappeda Service Quality Gresik Regency
Authors: Azharuddin Ahmad , Hidayat Hidayat , Pandu Negoro Yanuar
Published: December 2023

Service Quality which is provided by the Regional Development Planning Agency (Bappeda) of Gresik Regency. Service quality is considered a crucial element in carrying out public service functions. This research focuses on analyzing Aspects of quality of service such as reliability, responsiveness, security, empathy, and physical aspects. The research method used is a case study approach with a qualitative approach. Data was obtained through direct observation and interviews with staff and consumers on the SEPEKAN System service at Bappeda and related parties. The data is carefully analyzed to identify the extent of the current quality of service. The results of the study illustrate the general picture of the quality of services provided by Bappeda Gresik Regency including the highest level of importance, namely the X8 attribute regarding the fairness of costs/tariffs in services with a value of 3,708. The dimension of service quality that most affects community satisfaction in the SEPEKAN Bappeda System of Gresik Regency is the dimension of Responsiveness with a gap level of 0.169, which is an attribute of the speed of time in providing services. These findings have important implications for relevant parties in identifying areas of improvement and developing policies to improve the quality of public services in the future. It is hoped that this research can make a positive contribution to efforts to improve better public services in the regions.
Solar Corn Sheller Machine Design Based on Ergonomics Principles
Authors: Prihastono Endro , Yohanes Antoni , Ekoanindiyo Firman Ardiansyah
Published: December 2023

The existing sheller machine on the market still uses diesel fuel and electricity, even though diesel fuel has increased. Solar is a non-renewable energy. In addition, there is a new modification of the corn sheller machine with solar power to replace diesel fuel. The fuel replacement is focused on the utilization of sunlight. This corn sheller machine can replace the use of fossil raw materials and electricity with solar power and obtain faster, more ergonomic product results. The data required in this study are body dimension data or shoulder height anthropometry in an upright standing position to determine the height of the corn sheller that will be done standing when the farmer does the corn shelling process. With the existence of a solar-powered corn sheller machine, it is expected to be more productive than before. The transition to the use of environmentally friendly (pollution-free) corn sheller machines so as to reduce air pollution that previously used motor engines with fossil fuels, namely diesel, corn farmers can understand about work comfort, are able to operate environmentally friendly corn sheller machines and can carry out maintenance procedures for solar corn sheller machines.
Modifikasi Serat Kenaf (Hibiscus cannabinus L.) Menggunakan Anhidrida Propionat
Authors: Mistar Eka Marya , Muhammad Muhammad
Published: December 2023

Kenaf is a local crop that has great potential as a polymer composite reinforcement. However, the main weakness in strengthening composites using kenaf fiber is its hydrophilic or water-absorbing properties. To improve composite properties, surface modification of kenaf fiber is needed to enhance the structure and chemical properties of kenaf fiber. This study aims to explore the potential of chemical modification of kenaf fiber for use in composites. Chemical modification treatment of kenaf fibers was intended to improve the hydrophobicity that the compatibility between the fiber and matrix bonds are enhanced. In this study, chemical modification of kenaf fiber was performed using propionic anhydride. The modification process was done through a three-variation of retention time; 100, 200, 300 minutes at 100 °C. This research also compared the kenaf fiber properties with and without the modification process, including the analysis of the weight percent gain and surface morphological structure. The results showed that the optimal weight gain and morphological structure was at a retention time of 200 minutes.
Evaluasi Kinerja Struktur Gedung Terhadap Gempa Dengan Analisis Time History (Studi Kasus: Sekolah Nasional Global Nusantara Sampit Kab. Kotawaringin Timur)
Authors: Novyeremia Dwitiun , Baru Fransisco Happy Riadi Haputra , Meilawaty Okta
Published: December 2023

Indonesia ditetapkan terbagi menjadi dalam 6 wilayah gempa, hal tersebut dikarenakan Indonesia secara geografis yang berada di antara 3 lempeng tektonik yakni lempeng Indo Australia, yang menunjukkan pergerakan ke utara lalu lempeng Eurasia, yang menunjukkan pergerakan ke selatan dan lempeng Pasifik, yang menunjukkan pergerakan ke timur ke barat. Dengan melihat peristiwa gempa di berbagai lokasi di Indonesia sepanjang tahun 2022, total 217 gempa bumi dengan magnitudo di atas 5 SR. Penelitian ini dilakukan supaya bisa mengetahui kinerja struktur dari Gedung Sekolah Global Nusantara Sampit menurut parameter displacement, drif, serta base shear. Selanjutnya, hasil yang diperoleh dari penelitian ini akan di analisis dengan menggunakan kinerja batas layan dan kinerja batas ultimit, dengan menggunakan metode time history sesuai dengan aturan SNI-1726-2019. Menurut kinerja struktur pada Gedung Sekolah Global Nusantara Sampit diperoleh hasil bahwasanya partisipasi massa struktur terpenuhi pada waktu getaran 0,685 detik dan kontrol kinerja struktur yang dianalisis menggunakan 5 rekaman gempa diperoleh simpangan yang terjadi pada struktur gedung hanya Gempa Manjil yang memenuhi syarat batas layan sebesar (0,03/R)xH = 40 mm. dan batas ultimate sebesar 0,02xH =80 mm dan kinerja pada sendi plastis masuk kedalam immediate occupancy.
Prediksi Performansi Mahasiswa dengan Mempertimbangkan Motivasi Intrinsik Menggunakan Machine Learning
Authors: Achmad Andi Muhammad Fiqri
Published: December 2023

One of the factors that influence the success of an undergraduate student is learning motivation. Students are required to learn and develop themselves independently and actively find the source of knowledge, not just getting knowledge from the lecturers alone. One type of motivation is intrinsic motivation. Intrinsic motivation can be in the form of satisfaction in undergoing learning and gaining knowledge, the existence of appreciation of the achievements achieved, and the existence of life goals to be achieved. Thus it is necessary to do research to predict student learning performance by considering the intrinsic motivation of students. Primary data was obtained from the motivational questionnaire of 100 students, while secondary data includes attendance data, quiz data, assignments, mid-term exam, and final exam. Furthermore, the two types of data are combined. The first stage uses the Logistics Regression Algorithm, Support Vector Classifier, Decision Tree, Random Forest, Gaussian NaÃ¯ve Bayes, and K-Nearest Neighbors. The quality of the algorithm is measured using the level of accuracy. Cross validation test with 5 K-Fold was carried out, and the Decision Tree algorithm was obtained with the highest yield of 0.898051. The second stage is to do a tuning hyperparameter using a Grid Search and obtained a value of 0.927206. The third stage is to predict data test as much as 21 data and obtained accuracy of 0.904761.
Modifikasi Kombinasi Elektrokoagulasi â€“ Adsorpsi untuk Menyisihkan Fosfat dan TSS pada Limbah Laundry
Authors: Pramastya Cello Raka
Published: December 2023

The home industry laundry has grown rapidly. However, the growth of this industry has also led to an increase in the volume of laundry wastewater that is discharged into water bodies. This can affect the condition of water bodies, especially since the waste contains phosphates as detergent builders. Therefore, an effective wastewater treatment technology is needed. This research aims to analyze the efficiency of the modified electrocoagulation-adsorption reactor in reducing the concentration of phosphate and TSS in laundry wastewater. Laundry wastewater was flowed at a rate of 0.2 L/minute in the electrocoagulation process with a current strength of 5 A for 60 minutes, followed by column adsorption for 90 minutes conducted in one experimental reactor. Aluminum electrodes and zeolite adsorbent media were used in this experiment. The variables measured were the sampling time intervals between 150-300 minutes with a 30-minute interval. The research results show that the modification of the electrocoagulation-adsorption reactor is capable of reducing the concentration of phosphate and TSS in laundry wastewater. The best efficiency for phosphate reduction occurred at 210 minutes with an efficiency of 97.67%. Meanwhile, the optimal TSS reduction occurred at 300 minutes with an efficiency of 84.26%.
Pembuatan Grease Dari Palm Fatty Acid Distillte (PFAD) dengan Variasi Komposis Base Oil, Thickening Agent dan Asam Asetat Sebagai Zat Aditif
Authors: Pratiwi Ryu Indah , Junaidi Robert , Meidinariasty Anerasari
Published: December 2023

Substitusi minyak bumi dengan nabati sebagai bahan pelumas dilakukan untuk menghasilkan minyak pelumas yang ramah lingkungan. PalmÂ FattyÂ AcidÂ DistillateÂ (PFAD) menjadi salah satu produk turunan minyak kelapa sawit yang dapat dimanfaatkan sebagai bahan pembuatan grease. GreaseÂ adalah bahan semi padatan campuran antara minyak baseÂ oilÂ dengan bahan pengentalnya (ThickeningÂ Agent) yang berfungsi mengurangi gesekan dan keausan antara dua bidang yang saling bergesekan. penelitian ini bertujuan untuk mendapatkan karakteristik greaseÂ menurut SNI dan mendapatkan tingkat NLGI terbaik. Penelitian ini dilakukan dengan komposisi antara baseÂ oilÂ dan thickeningÂ agent dan zat aditif.Â Grease terbaik yang diperoleh termasuk dalam spesifikasi greaseÂ dan parameter kinerja untuk tingkat kualitas NLGI grade A dengan formulasi baseÂ oil : thickeningÂ agent 80:20 dengan penambahan zat aditif 3,5 ml, densitas 0,9057 gr/ml dan droppingÂ point 98Â°C yang telah sesuai dengan SNI dengan penetrasi 241 mm yang mengindikasikan grease ke dalam kelas NLGI 3Â
Pembuatan Gas Metana Dari Gas Karbon Dioksida (CO2) Menggunakan Katalis Ni/Al2O3 Dengan Promotor Logam Fe
Authors: Putri Tiara Manda , Junaidi Robert , Meidinariasty Anerasari
Published: December 2023

Carbon dioxide (CO2) is one of the most critical greenhouse effect causes. One method that can reduce the problem of global warming is by converting CO2 and utilizing it into a CO2 hydrogenation reaction into methane. This research aims to obtain methane gas from CO2 gas using a Fixed Bed Reactor for the CO2 methanation process. This research uses Ni/Al2O3 catalyst as support and Fe metal as a promoter with in situ method by varying the amount of Fe metal promoter up to 1gr - 5gr and time variation of 30 minutes, 45 minutes and 60 minutes. The highest methane gas yield was obtained in sample 15 with more Fe metal promoter 5 gr (variation 1-5 gr) for 60 minutes (variation 30, 45, and 60 minutes), which amounted to 12.54%. The amount of Fe metal promoter and the length of time used is directly proportional to the methane gas (CH4) produced. This is because the addition of Fe as a promoter can increase catalyst activity and catalyst stability, so that the catalyst can work well in converting CO2 into methane thermal gas.Keywords: Carbon Dioxide, CO2 Methanation, Catalyst Ni/Al2O3, Promoter Fe, Methane (CH4).
Analisis Potensi Bahaya Dengan Metode Hazard Identification and Risk Assesment dan Failure Mode Effect Analysis Pada PT.XYZ
Authors: Biarto Muhammad Riski , Ismiyah Elly , Rizqi Akhmad Wasiur
Published: December 2023

PT. XYZ is a manufacturing company that specializes in making food and soft drinks. According to the company, there have been no reports of incidents during the production process. However, based on empirical findings obtained from observations in the maintenance section, especially in the field of assembly work, many near misses or near misses occur during the implementation stage. Efforts that need to be made to overcome this are by identifying activities that are at risk of causing work accidents. In this research, work accidents were identified using the HIRA method, which then based on the results of the HIRA, improvements were then carried out based on priorities using the FMEA methodology. In the grinding machine assembly process, it is known that there are six work activities including material selection, grinding, welding, painting, assembly, and machine trial. The HIRA identification results show that there are 8 activities that have a medium risk of work accidents, for which FMEA analysis will be carried out. The results of the FMEA analysis show that the motor selection activity for the grinding drive has the highest RPN value so the control in the work is carried out using the help of a chain block, ensuring the chain block is in prime condition, using complete personal protective equipment, carrying out work according to SOP, and using chain block according to capacity.
Usulan Urutan Penjadwalan Produksi dengan Metode Run-Out Time Pada PT National Assemblers
Authors: Ramadhani Ramadhani , Wahyudin Wahyudin
Published: December 2023

Saat ini PT National Assemblers sedang melakukan kerja sama dengan PT TVS Motor Company Indonesia untuk memproduksi dan merakit berbagai jenis kendaraan roda tiga (bajaj). Terdapat berbagai macam jenis bajaj TVS yang dirakit oleh PT National Assemblers. Di mana permintaan produksi jenis bajaj per minggunya berbeda-beda, sehingga membutuhkan urutan penjadwalan produksi yang tepat agar permintaan setiap minggunya dapat tercapai dengan memperhatikan kapasitas produksi. Penelitian ini bertujuan untuk memberikan usulan penentuan penjadwalan produksi untuk memenuhi permintaan produksi mingguan PT National Assemblers. Penelitian dilakukan dengan metode Run-Out Time (ROT) yaitu suatu pendekatan sederhana yang dimanfaatkan dalam perhitungan dan penentuan produk mana yang terlebih dahulu diproduksi agar semua permintaan dapat dipenuhi sejalan dengan jumlah produksi. Data-data yang diperlukan untuk mencari nilai ROT di antaranya adalah jenis produk, persediaan (unit), permintaan (unit/minggu), ukuran lot (unit), produksi (unit/minggu). Hasil studi menunjukkan bahwa urutan penjadwalan produksi berdasarkan perhitungan nilai ROT adalah sebagai berikut: jenis bajaj FI (Nilai ROT = 13,9), Carbu Deluxe Plus (Nilai ROT = 16,3), Cargo Carbu (Nilai ROT = 27,7), Carbu Deluxe (Nilai ROT = 34,1), dan Cargo FI (Nilai ROT = 88,3).
Optimalisasi Pengendalian Persediaan Biji Kopi Dengan Metode EOQ (Studi Kasus Kopi Bubuk Eyang Kakung)
Authors: Nugraha Satria Bayu , Jufriyanto Moh. , Wasiur Rizqi Ahmad
Published: December 2023

Kopi Bubuk Eyang Kakung is one of the micros, small and medium enterprises (MSMEs) in Gresik which operates in the field of coffee bean processing. This company often faces a situation where raw material supplies are close to running out, which is often referred to as stockout. To solve these challenges related to inventory management, Kopi Bubuk Eyang Kakung tries to use the economic order quantity (EOQ) methodology. EOQ is an important technique in procuring raw materials in a company, which aims to determine the most economical order quantity for each purchasing cycle, while determining the order frequency and optimal time for reordering. The use of the EOQ method is helpful in reducing costs associated with inventory, thereby ensuring effective operation of the inventory system. This method facilitates achieving optimal order quantities while minimizing costs. Specifically, the EOQ method determines the most efficient order quantity by considering the costs per period related to raw materials for BM coffee beans of IDR 140,724, JM of IDR 213,065, and BA of IDR 88,228.
Pengendalian Kualitas Material Kapur pada PT. AJG dengan Metode SQC dan FMEA
Authors: Firmansyah Fatih , Jufriyanto Mohammad
Published: December 2023

PT. Aneka Jasa Grhadika merupakan perusahaan yang menerapkan sistem produksi Make to Order (MTO), Assembly to Order (ATO), dan Engineer to Order (ETO). Dalam memproduksi produknya sangat mempertahankan kualitas dalam memberikan kepercayaan dan kepuasaan kepada customer. Hal ini didukung dengan ketersediaan ISO 9001:2015 yang berkaitan dengan quality management system. PT. AJG juga merupakan perusahaan yang bergerak di bidang Engineering, Procurement, dan Contruction (EPC). Pada proses pengadaan seringkali terjadi ketidaksesuaian antara material kapur yang diterima dengan standar spesifikasi yang telah ditetapkan oleh perusahaan. Hal tersebut dijadikan topik pembahasan oleh peneliti dengan tujuan untuk mengetahui faktor apa saja yang menyebabkan ketidaksesuaian material kapur dan pengendalian kualitas yang tepat. Dalam penelitian ini menggunakan metode Statistical Quality Control (SQC) dan Failure Mode Effect Analysis (FMEA). Hasil penelitian diperoleh temuan bahwa material kapur berada di luar batas kendali, dan faktor penyebab ketidaksesuaian material kapur meliputi faktor mesin, manusia, metode, pengukuran, dan lingkungan. Usulan tindakan perbaikan yang direkomendasikan yakni melakukan penjadwalan maintenance mesin, memberikan penugasan sertifikasi keahlian kepada karyawan, melakukan identifikasi terkait supplier dengan kriteria pelayanan terbaik, menstruktur metode penerimaan material kapur, melakukan mediasi dengan pihak rekanan terkait kondisi aktual kualitas material kapur, dan melakukan uji sampling terkait area yang akan diambil material kapur secara periodik.
Review of Belfast Punk and the Troubles: An Oral History, by Fearghus Roulston
Authors: Gemrichová Marie
Published: December 2023

Review of Belfast Punk and the Troubles: An Oral History, by Fearghus Roulston (Manchester: Manchester University Press,  2022), 208 pp., ISBN: 978-1-5261-5223-7,  £85.00 (Hardcover)
Symbolic, Social and Territorial Boundaries: Paradoxes of Groupness and Potentials for Change in Northern Ireland
Authors: Todd Jennifer
Published: December 2023

This article focusses on social, symbolic and territorial boundaries in Northern Ireland, and the group relationships that they define. It asks how the social and symbolic boundaries have been renewed despite so much political and popular effort to move beyond them since the Good Friday Agreement of 1998. Theoretically, the question is a foundational one: how group boundaries go beyond individual intent. Frank Wright addressed this question nearly forty years ago, showing the role of violence as a mechanism that worked behind the backs of those who wanted change. Northern Ireland, he argued, is the sort of ‘ethnic frontier’ where there is no way out, short of revolutionary force which overthrows one group and thereby creates new borders and new scapegoats. I will argue that this conclusion pays too little attention to the socio-cultural mechanisms that reproduce group division as a quasi-institutional inertial phenomenon that is also open to everyday change. I argue that quite radical transformation of group division is possible and also difficult, and that liberal consociational institutions are much less important in promoting or hindering such change than is often supposed. This revises Wright’s argument and it suggests a way forward – radical interventionism – that is neither violent upheaval, impossible reconciliation, or stabilised constraint. In conclusion, I ask if and how change in the territorial boundaries would help or hinder this.
Критерии оценки качества изготовленных адгезивных шинирующих конструкций
Authors: Новак Н.В. , Старовойтова В.С.
Published: December 2023

В данной статье описываются критерии оценки качества изготовленных адгезивных шинирующих конструкций, применяемых при различных нозологических формах. Их разработка стала возможной благодаря тщательному изучению функциональных и структурных особенностей зубов и зубочелюстной системы в целом, а также свойств стоматологических материалов, которые используются при шинировании подвижных зубов. Цель исследования. Разработать критерии оценки качества адгезивных шинирующих конструкций. Объекты и методы исследования. Для оценки качества исследовали 100 ранее изготовленных нами адгезивных шинирующих конструкций, применяемых при острых и хронических травмах зубов. Результаты исследования и их обсуждение. Проведен анализ изготовленных адгезивных шин, а также ошибок и осложнений, возникающих при иммобилизации зубов. Разработаны критерии оценки качества адгезивных шинирующих конструкций. Заключение. Практическое применение предложенных критериев оценки изготовленных адгезивных шинирующих конструкций позволит повысить эффективность лечения, а также снизить число осложнений, связанных с ошибками на всех этапах работы.