bluuebunny/crossref_metadata_2025 huggingface dataset:
THE PRESENCE OF SYUBHAH IN THE PROCUREMENT PROCESS AND PROVISIONS OF CONSTRUCTION CONTRACTS
Authors: Abdul Rashid Khairuddin , Hasan Sharina Farihah , Sahari Noorul Huda
Published: December 2024

In the procurement of Islamic philanthropic-funded religious and socio-economic infrastructures and facilities perhaps there exist elements of Syubhah or “uncertain” or “doubtful” matters. Consequently, a qualitative study – combining desk research and discussions with Shariah and construction industry experts – was carried out. The study critically examines whether the construction procurement processes, and contract provisions used therein are consistent with the requirements of the Shariah or otherwise. The outcome of the study suggests the majority of the procurement processes and contract provisions are consistent with the principles of the Shariah, but some are not outright non-compliance hence, suggesting the presence of syubhah. The study and its findings are considered significant in the following ways: (i) a breakthrough for the construction industry’s effort to practice Shariah compliance in its dealings, (ii) a reference for the authorities responsible for the procurement of Islamic philanthropic-funded religious infrastructures and facilities to be more aware of the requirements of the Shariah and (iii) acts as a prelude in the effort to establish Shariah-compliant standards and guidelines on the procurement of  Islamic philanthropic-funded religious and socio-economic infrastructures and facilities.
The effect of flag leaf defoliation on grain morphology in wheat after drought stress kolistin
Authors: Španić Valentina , Varnica Ivan , Plavšić Hrvoje , Duvnjak Jurica
Published: December 2024

It is known that flag leaf influences grain yield potential in wheat (Triticum aestivum L.). However, little is known regarding the influence of defoliation of flag leaf after drought stress. The effect of flag leaf defoliation and drought stress on the grain’s weight, area, width, length, and circularity was investigated in six bread wheat varieties. Drought treatment, genotypes and their interaction significantly influenced investigated traits while weight and length of the grain were not significantly affected by flag leaf defoliation. However, the interaction of drought treatment and flag leaf defoliation showed a significant effect only on grain circularity. The results showed that drought applied after anthesis significantly reduced mature grain weight in wheat, whilst the effect of flag leaf defoliation after anthesis was insufficient to cause significant differences. However, drought tolerance of some varieties (Bubnjar) might mitigate the drought and defoliation effects as they could have a compensatory increase in the photosynthesis of spikes. Other morphological traits of grain showed less pronounced differences under stress treatments that were also genotypic-specific characteristics. Generally, genetic influence was observed among wheat varieties when they were imposed on source restriction (flag leaf defoliation) and drought stress.
Ukrainian dictionary. Noun. Letter
Authors:   Ukrainian Lingua-Information Foundation of the National Academy of Sciences of Ukraine, Verbynenko Iu. I.
Published: December 2024

Contains a lexicographical description of Ukrainian nouns beginning with the letters "Г" and "Ґ", with a detailed analysis of meanings, grammatical forms, and examples of usage. Intended for linguists, teachers, students, and anyone who studies the Ukrainian language.
O
još jednom srednjovjekovnom groblju Vinodola
Authors: Konestra Ana
Published: December 2024

U radu se donose preliminarni podaci prikupljeni tijekom zaštitnih istraživanja srednjovjekovnoga groblja na lokalitetu Štale u Bribiru u Vinodolu. Istraživanjima je potvrđeno postojanje većega groblja, ranije pretpostavljenoga na temelju slučajnih nalaza iz grobova koji su uništeni 1949. godine prilikom građevinskih radova. Analiziraju se značajke položaja i samoga groblja, tipologija grobova i pokapanja te se sumarno donosi pregled nalaza, mahom nakita. Na temelju potonjega te dosada provedenih 14C analiza, groblje se datira u razdoblje 11. – 15. stoljeće. Nadalje, groblje na Štalama promatra se u kontekstu srednjovjekovnih groblja Vinodola i njemu susjednih prostora te prostora Dalmacije i Istre, čime se ističu specifičnosti ovoga groblja te potvrđuju značajke vinodolskih groblja općenito.
The material provenance of stone artefacts from the Novooleksandrivka kurgan
Authors: Nikitenko I. S , Teslenko D. L , Netecha M. V
Published: December 2024

Purpose. To establish the origin of the rocks used to produce ancient stone tools and goods found as a result of Novooleksandrivka Kurgan “Sura-Oba” excavations (Dnipropetrovsk Region, Ukraine).

Methodology. The research was carried out using the method of petrographic analysis of the materials of stone artefacts in thin sections. The chemical composition of the studied rocks was determined using X-ray fluorescence analysis. The obtained data was compared to the features of similar rocks from different occurrences, using thin sections of rocks from natural outcrops and previously studied stone artefacts, as well as the data of geological reports and appropriate literature.

Findings. Thirteen stone artefacts, represented by an altar stone, hammerstones, whetstones, a hammer-axe and different polyfunctional tools found in the burials of the Novooleksandrivka Kurgan “Sura-Oba” dated back to the Chalcolithic, Bronze Age and Early Iron Age were analyzed. As a result of the conducted research, it was ascertained that sandstones, granite, amphibolite, quartz rock, dolerite-basalt, actinolitite, and epidosite represent their materials. Most of the studied collection samples have similar analogues among the rocks found in the Middle Dnipro Area and may be of local provenance. The specimen of dolerite-basalt microporphyry may originate from the East Azov Sea Area, and the oligomictic sandstone, most likely, was delivered from the occurrences of the Donets Coal Basin Carboniferous system.

Originality. For the first time, stone tools and goods discovered during the excavations of the “Sura-Oba” mound in the village of Novooleksandrivka were studied using petrographic analysis; the probable places of their origin were established.

Practical value. The results obtained can be used in conducting research on history and archaeology, as well as in popular science works and excursion activities.
Quantum mechanical model of interaction of charges of metal atoms during creation of chrome coatings
Authors: Sereda B. P , Udod A. M , Baskevych O. S , Sereda D. B
Published: December 2024

Purpose. To determine the dependence of the change in chemical bond energy, using a quantum mechanical model of the interaction of dopant ions with a metal substrate in the form of a chain of N-finite centers located along a straight line.

Methodology. Numerical calculation of the analytical expressions of a quantum mechanical system consisting of the interaction between metal ions of doping elements and a chain of N-finite centers.

Findings. By solving the Schrödinger equation for a charge moving in the field of a chain with N-finite centers, expressions for calculating the energy of chemical bonding of dopant ions with metal substrates were obtained. The analytical expressions for calculating the energies of chemical bonds are obtained. The most probable types of chemical bonds during the formation of protective coatings under non-stationary temperature conditions were determined.

Originality. Schrödinger’s equation in ellipsoidal coordinates for the motion of electric charges in a field of N-finite centers located along a straight line was solved and expressions for calculating the energies of chemical bonds were obtained. The solution of the Schrödinger equation is reduced to solving a two-center problem with a perturbation. The model allows us to understand the dynamics of interaction of metal ions with a substrate in the form of chains of atoms. The tendency of change in the energy of chemical bonding of metal ions with substrates depending on the distance between them and the charge value is established.

Practical value. The developed method for calculating the energy of chemical bonding between metal ions of alloying elements with a chain of N-finite centers will allow one to qualitatively establish the tendency of formation of certain compounds in the process of obtaining protective coatings under non-stationary temperature conditions. The method can be used to calculate the energies of chemical bonds when selecting alloying elements for other methods of creating protective coatings.
Active power regulation in wind turbines
Authors: Liabahova T. V , Ivanov O. B
Published: December 2024

Purpose. To develop a methodology and determine rational parameters of wind energy installations with doubly fed induction generator to ensure maximum efficiency, taking into account changes in wind flow speed and power regulation to maintain stable and efficient operation of the installation.

Methodology. This study used a combination of theoretical analysis and mathematical modeling. Analytical models for estimating wind turbine power were developed through regression analysis, incorporating key parameters such as wind speed, blade pitch angle, and the generator’s synchronous rotation speed.

Findings. Parameters and conditions ensuring maximum power of a wind turbine with a doubly fed induction generator were established and analyzed. It was determined that the efficiency of the wind turbine installation with a doubly fed induction generator depends on the nature of the wind flow. Active power regulation allows for an increase or stabilization of output power with changes in wind speed. The established dependencies allowed for determining the optimal conditions for ensuring maximum power. Mathematical modeling confirmed the theoretical conclusion regarding the increase in electricity generation efficiency with the rational selection of the specified parameters of the wind turbine.

Originality. The influence of key wind turbine parameters on the conditions for realizing the maximum power mode as well as the possibilities of using the speed regulation range of the wind turbine to limit excessive mechanical loads during wind gusts were determined. The study enhances the understanding of how synchronous torque affects the stability of wind generator operations, emphasizing the need for its control to maximize output power under various wind load levels.

Practical value. The established dependencies between key parameters of the wind turbine and their impact on operational efficiency allow for more allow for more precise tuning of wind turbines to achieve maximum productivity during wind gusts. This is crucial during the design and operational phases. The developed methodology for regulating the rotor speed can help reduce operational costs by ensuring stable operation of wind turbines over a wide range of wind speed. The data obtained may also facilitate the development of control systems that automatically adapt wind turbine parameters to changing conditions. This will contribute to increased efficiency of wind energy use and reduced impact of wind turbines on the stability of the power grid.
Technogenic hazards coefficient of sand-resin mixtures in foundry manufacturing
Authors: Solonenko L. I , Uzlov K. I , Repiakh S. I , Prokopovich I. V , Bilyi O. Р
Published: December 2024

Purpose. To carry out a comparative quantitative assessment of environmental and sanitary-hygienic hazards of utilizing synthetic resins for manufacturing molds and rods in foundry production.

Methodology. Quarry quartz sand brand 1K2O202, furan resin brand Permaset 839 and catalyst Permacat 128, aluminum alloy AL2, gray cast iron SCh200, carbon steel 30L, bronze BrА9Zh3L were used in the work. Chromel-alumel thermocouples completed with electronic potentiometer were used for thermography. Molds were made from quartz sand, furan resin and catalyst mixture. Casting mold heating depth determination from casting to temperatures above 400 °C was carried out by its thermogram graphical processing, which was obtained after casting mold pouring with aluminum alloy, bronze, gray cast iron and carbon steel.

Findings. Among those studied, the most dangerous are urea-phenol-formaldehyde, urea-formaldehyde and urea-furan resins, and the least dangerous are phenol-formaldehyde and phenol-formaldehyde-furan resins. Ecological and sanitary-hygienic hazard level when using resin mixtures increases with increasing resin amount in mixture, castings walls thickness, their surface area, as well as with increasing temperature of melt poured into the mold.

Originality. For the first time, in relation to foundry molds and rods in foundry production manufacturing, technogenic hazard coefficient (THC) has been developed and its value has been calculated. This, in fact, is air volume (m3) containing maximum permissible concentration of carcinogenic or poisonous substances released as a result of mold organic binder material destruction when pouring aluminum alloy, bronze, cast iron or steel.

Practical value. The use of the research results makes it possible to increase the level of predicting accuracy of technogenic (sanitary, hygienic and environmental) hazards, accuracy level of calculating ventilation systems capacities in foundries, taking into account the serial castings production, castings structural features, as well as binding materials nature for foundry molds and rods for such castings.
The relationship between the development of a safety culture and the implementation of safety requirements in organisations
Authors: Tsopa V. A , Cheberiachko S. I , Yavorska O. O , Deryugin O. V , Aleksieiev A. A
Published: December 2024

Purpose. To establish the relationship between the development of a safety culture in an organisation and the fulfilment of occupational safety requirements.

Methodology. To solve the tasks set, we use the method of scientific synthesis, which allows us to obtain new knowledge as a result of combining previously dismembered parts of the subject into a single whole, to determine mutual expectations in occupational health and safety (OHS) management systems (MS).

Findings. It is proposed to determine the level of safety culture of an organisation on the basis of five stages: indifference, reaction, dependence, independence, interdependence, which characterises a change in the awareness of employees of the organization to fulfil the requirements for OHS of employees. A process for determining the level of safety culture is proposed by identifying the attitude to the fulfilment of OHS requirements by an OHS specialist, a manager of a unit (organisation), employees’ self-awareness and mutual assistance of employees to fulfil OHS requirements. The coefficient of fulfilment of the requirements for OHS of employees in a conditional unit was calculated, which allows determining the stage of development of safety culture and the contribution of each employee to the development of safety culture. A distribution of preventive measures to improve OHS level, based on the level of development of safety culture, is proposed.

Originality. The relationship is identified between the coefficient of compliance with occupational safety requirements and employee health and the stages of development of safety culture, taking into account the impact on employee compliance from managers of a units, OHS specialists, self-awareness and mutual assistance through weighting coefficients.

Practical value. Recommendations are developed to increase the effectiveness of OHS MS by strengthening the implementation of OHS requirements by changing their attitude to OHS issues, by introducing preventive measures in accordance with the development of safety culture.
Model for optimal control of charge loading parameters of metal-reducing plants
Authors: Moroz B. I , Shvachych H. H , Selehei A. M , Krekoten M. A , Olishevskyi I. H , Zhamanbayev B. U
Published: December 2024

Purpose. The study’s main objective is to consider two main factors simultaneously when optimizing the blast furnace loading process. The first is to maximize the potential use of gases in the blast furnace’s “dry zone”, which increases the efficiency of the ore recovery process. The second is to increase the melting productivity by optimizing the temperature regimes and uniform distribution of the charge over the furnace space, which ensures the stability of the furnace. Achieving a balance between these factors is critical to improving the overall efficiency of blast furnace production.

Methodology. The study used regression analysis to investigate the quantitative dependencies between the utilization degree of reducing gases and the efficiency of blast furnace melting. Evaluation of the results allowed us to create a predictive model to determine the main characteristics of the process.

Findings. The research results allowed us to create a predictive model to determine the main characteristics of the process. The analysis was carried out based on experimental data obtained from industrial blast furnaces, considering different modes of loading and distribution of raw materials.

Originality. The developed model is a new approach to optimizing control influences on blast furnace loading, considering the dynamic change in ore load. This allows including current changes in technological parameters and promptly adjust the smelting process. This approach improves the process’s technical and economic performance and effectively predicts further development.

Practical value. The proposed methodology for controlling the loading process provides more accurate control over reducing gases use and the effectiveness of their impact on the ore. That leads to a decrease in fuel losses, a reduction in the environmental burden, and an increase in the overall productivity of the blast furnace by optimizing gas-dynamic processes.
Anti-hyperglycemic and anti-hyperlipidemic effects of chia seed extract in alloxan-induced diabetic mice
Authors: Moon R J , Alam O , Kazal M K H , Khatun M K , Haque M R , Chacrabati R , Kader H A , Goswami C
Published: December 2024

Diabetes is a chronic and debilitating metabolic disorder that gradually impairs the body's ability to regulate blood sugar levels, leading to complications that can affect multiple organs and systems, including the heart, kidneys, nerves, and eyes. Chia seed contains a high concentration of dietary fiber, omega-3 fatty acids, and essential amino acids, which may have hypotensive, hypoglycemic, and anticholesterolemic benefits. The objective of this research was to investigate whether administration of chia seed extract (CSE) may reduce the frequency of metabolic diseases in mice with or without diabetes. The experimental mice were divided into four groups such as normal control group, normal mice with 50 mg/ kg body weight of CSE, diabetic control group (no CSE) and diabetic mice with 50 mg/ kg body weight of CSE. In order to induce diabetes, 2% alloxan solution was used. The results showed that CSE administration led to a significant reduction in food intake in normal mice, but it did not exhibit a notable decrease in diabetic mice. While the extract did not affect the body weight of diabetic mice, a slight reduction was observed in the normal mice treated with chia. In comparison to the normal and diabetic mice, the blood glucose level was lower in chia-treated groups at all-time points of glucose tolerance test. Additionally, CSE showed a tendency to reduced LDL, TC, TG and HDL concentrations. Furthermore, CSE treated groups showed reduced liver and kidney weight in comparison to the normal and diabetic mice, but the weight of the heart was almost similar in all groups. The above findings suggest that CSE exhibits anti-hyperglycaemic, and lipid-lowering properties. These effects could potentially be used to reduce the risk of metabolic disorders and assist diabetic subjects in maintaining lipid and glucose homeostasis.
Bangladesh Journal of Animal Science 53(4): 144-153, 2024
Positron-emission tomography (PET) and single-photon-emission computed tomography (SPECT) Diagnosis of Neurological disorders
Authors: Rahman Aminur
Published: December 2024

Functional neuroimaging is a major tool in the study of neurological illnesses. It plays a role in diagnosis, therapy, and surgical planning. It can aid in the identification and understanding of functional movement impairments, as well as their differentiation from other diseases. It can also aid in detecting co-morbid organic illnesses. Positron-emission tomography (PET) and single-photon-emission computed tomography (SPECT) are well-known nuclear-medicine imaging techniques utilized in current neurological diagnostics. PET (Positron Emission Tomography) and SPECT (Single Photon Emission Computed Tomography) are two imaging procedures that use radioactive tracers to analyze the brain and other organs. They are essential in both clinical research and treatment development, and can aid in the early detection and treatment of neurological diseases. So, the combination of PET with 18F-fluorodeoxyglucose (FDG) and SPECT with a 111 In-labeled ligand provides clinicians with information an other kind of neurological disorders.
Bangladesh J Medicine 2025; 36: 3-14
The Reve’s Puzzle with a single cheat of the Divine rule
Authors: Majumdar Abdullah Al Kafi
Published: December 2024

A new variant of the Reve’s puzzle, which allows (at most) one violation (or, “cheat”) of the “divine rule”, has been introduced in an earlier paper. Letting S(n) be the minimum number of moves required to solve the new generalization with n discs, this paper finds an explicit expression of S(n), taking into account all the possible schemes. Some results related to the generalization to the general case of c cheats are derived.
J. Bangladesh Acad. Sci. 48(2); 251-264: December 2024
Modified Cramer's rule for solving a fully fuzzy system of linear equations with a nonsquare coefficient matrix
Authors: Khatun Fatema , Hossain Md Sahadat , Akter Mst Monjuara
Published: December 2024

In this modern technological world, several problems arise daily, whose maximum problems have been unsolved in a classical way because of their ambiguity. To solve those problems, the applications of fuzzy mathematics are increasing rapidly, whereas traditional classical methods have failed. Here, we have modified Cramer's rules method for solving the non-square coefficient matrix of the fully fuzzy system of linear equations (FFSLE) using triangular and trapezoidal LR fuzzy numbers. This modified method is compared with another method that can only solve the square coefficient matrix using fuzzy triangular and trapezoidal numbers. At last, we observe that our modified method is more general than others. This process is illustrated with numerical examples.
J. Bangladesh Acad. Sci. 48(2); 147-160: December 2024
Avifauna of Noakhali Science and Technology University premises and adjacent areas
Authors: Mahmud Humayra , Sultana Sadia , Akter Nasrin , Talukder Rasel
Published: December 2024

A study was carried out from September 2021 to September 2023 to estimate the diversity, seasonal variation, and relative abundance of avifauna of Noakhali Science and Technology University and its adjacent areas. One hundred fourteen bird species were recorded from the study site belonging to 18 different orders. Of these, one species, Grey-headed Fish Eagle Haliaeetus ichthyaetus, has been rated globally as Near Threatened (BirdLife International 2021). The distribution of birds among habitat types was significantly different (f=7.153, p<0.05, df=2). The walking trail was inhabited with the highest species diversity (H'= 3.45) with the highest evenness (J= 0.84), while grassland was recorded with the lowest species diversity (H'= 2.69) but had almost similar evenness index (J= 0.84); it could have a relation to the food availability. Considering the richness of bird species, the existing habitats will be restored.
J. Bangladesh Acad. Sci. 48(2); 237-250: December 2024
Quản lý rủi ro biến đổi khí hậu trong hoạt động tín dụng tại các ngân hàng thương mại Việt Nam
Authors: Phạm Thị Tuyết Trinh , Nguyễn Thị Hồng Vinh
Published: December 2024

Nghiên cứu này tìm hiểu quản lý rủi ro biến đổi khí hậu trong hoạt động tín dụng tại các ngân hàng thương mại Việt Nam. Phân tích nội dung và phân tích chủ đề được sử dụng để xem xét các báo cáo hàng năm của 23 ngân hàng thương mại Việt Nam từ 2019-2023. Kết quả nghiên cứu cho thấy hoạt động tín dụng của ngân hàng thương mại Việt Nam chưa phản ánh đầy đủ rủi ro biến đổi khí hậu. 70% ngân hàng thương mại được nghiên cứu đã ban hành quy định quản lý rủi ro môi trường và xã hội trong hoạt động cấp tín dụng. Quản lý rủi ro liên quan đến khí hậu và môi trường đang được các ngân hàng thương mại tiếp cận từ trách nhiệm xã hội. Các ngân hàng thương mại cũng chưa quan tâm đầy đủ đến rủi ro biến đổi khí hậu ở cả tác nhân rủi ro vật chất và rủi ro chuyển đổi. Việc đo lường và đánh giá rủi ro biến đổi khí hậu trong hoạt động tín dụng một cách tổng thể cũng chưa được thực hiện.
EFEK PEMANASAN AGGREGAT EPS MODIFIKASI TERHADAP KUATTEKAN BETON RINGAN PASIR BATU APUNG
Authors: Kusnadi Kusnadi , Rauf Ichsan , Imran Imran
Published: December 2024

Using lightweight materials as construction materials reduces the weight of the structure, thereby reducing earthquake loads. Pumice sand is a light local material which is quite abundant on Tidore Island and has been used as a substitute for sand in making lightweight cement bricks (tela). To minimize the weight of lightweight concrete that uses pumice sand as fine aggregate, full substitution of the coarse aggregate with aggregate from EPS waste (white cork) is carried out. This effort is also made to reduce waste generation which damages the environment. The use of EPS waste to replace some or all of the aggregate in the concrete mixture reduces the weight significantly, but also causes a very large reduction in quality. To improve the quality of lightweight concrete using pumice sand and EPS waste, the EPS aggregate is modified by heating. Heating EPS aggregate aims to increase its density. This research aims to improve the quality of lightweight concrete using pumice sand and aggregate from EPS waste. EPS waste aggregate heating is carried out at varying temperatures of 100oc, 110oc, 120oc, 130oc, 140oc. The concrete mixture is made in volume measurements with a composition of 1 part cement, 2 parts pumice sand and 3 parts modified EPS aggregate with a cement water factor of 0.45. The quality tests carried out include compressive strength tests, tensile strength tests and collapse modulus tests. The test results show that the effect of heating in the process of making modified EPS aggregates increases the density value which has an impact on increasing the compressive strength value of the resulting concrete.
ANALISIS TINGKAT PENERAPAN RMPK DALAM RANGKA PENERAPAN SISTEM MANAJEMEN MUTU (SMM) PADA PROYEK PRESERVASI JALAN DAN JEMBATAN
Authors: Radjeb Surahman A. , Sabaruddin Sabaruddin , Marsaoly Nuramaiyasa
Published: December 2024

Studi ini menganalisis hubungan antara Rencana Mutu Pekerjaan Konstruksi (RMPK) dan Sistem Manajemen Mutu (SMM) dalam konteks proyek preservasi jalan dan penggantian jembatan Sagea-Patani I dan II. Analisis melibatkan metode statistik seperti korelasi, uji t, dan regresi untuk mengevaluasi pengaruh RMPK terhadap implementasi SMM. Hasil menunjukkan korelasi positif antara RMPK dan SMM, namun dengan dampak yang masih perlu diperjelas. Pelatihan tim dan pengelolaan mutu yang teliti menjadi faktor kunci dalam meningkatkan efektivitas SMM. Implikasi praktis dari studi ini adalah perlunya perbaikan RMPK untuk meningkatkan kualitas implementasi SMM. Penelitian lanjutan diperlukan untuk memahami faktor-faktor tambahan yang dapat memengaruhi efektivitas SMM dalam proyek konstruksi.
IDENTIFIKASI MELAYU DALAM PERSPEKTIF HISTORIS
Authors: Widjayengrono Pheres Sunu
Published: December 2024

This article attempts to show the meaning of Malay, especially in Riau Archipelago, in historical perspective with mean theoretical framework divided in three periods (modern, medieval, and classic periods). It’s study of intellectual history methodology and applies history method with using of related secondary sources. Comparative analysis and cultural approach’s applied to data interpretation so that useful for historical analysis. Each period has characteristic meaning depended on mentality situation and bias of ideas from previous period. This article assumes that each dominantly formal or governing power in each period is primary element and cause for cultural meaning and people’s acceptance of Malay definition. Keywords: Malay, ethnic, society, cultural, identification.
ANALISIS KESTABILAN LERENG MENGGUNAKAN METODE BISHOP PADA PENGGALIAN PASIR DI KELURAHAN KALUMATA KECAMATAN TERNATE SELATAN
Authors: Muzdalifah Nurul , Haya Arbi , Firman Firman , Sahetapy George Belly
Published: December 2024

Pada Penggalian Pasir di Kelurahan Kalumata Kecamatan Ternate Selatan terdapat lereng dengan kondisi tidak aman yakni diketahui dari kenampakan langsung lereng tersebut yang memiliki kemiringan dan ketinggian yang sangat besar. Kestabilan lereng dapat diketahui dengan menghitung nilai faktor keamanan terhadap pengaruh muka air tanah. Metode analisis kestabilan lereng yang digunakan dalam penelitian ini adalah metode bishop. Metode Bishop bekerja berdasarkan prinsip keseimbangan batas yaitu menghitung kekuatan geser yang akan mempertahankan kemantapan, dibandingkan dengan besarnya tegangan geser yang bekerja. Hasil dari perhitungan faktor keamanan lereng berdasarkan pendekatan muka air tanah dari Hoek dan Bray kondisi lereng kering memperoleh FK perhitungan slide 0.826 sedangkan FK perhitungan manual 0.844, kondisi lereng setengah jenuh memperoleh FK perhitungan slide 0.825 sedangkan FK perhitungan manual 0.830 dan kondisi lereng jenuh memperoleh FK perhitungan slide 0.800 sedangkan FK perhitungan manual 0.806 menunjukan bahwa lereng pada lokasi penggalian pasir di Kalumata berada pada kondisi tidak aman karena nilai FK 1.3 berdasarkan ESDM Nomor 1827 K/30/MEM/2018 Tentang Pedoman Pelaksanaan Kaidah Teknik Pertambangan Yang Baik.Kata kunci: Kondisi Lereng, Faktor Keamanan, Bishops, Kalumata
Kajian Perubahan Kualitas Air di Kawasan Lingkar Tambang Halmahera Tengah Provinsi Maluku Utara
Authors: Haya Arbi , Alkatiri Hilda , Halil Amrih
Published: December 2024

Kajian perubahan kualitas lingkungan pada kawasan pertambangan di wilayah Halmahera Tengah perlu dilakukan untuk mengetahui sejauh mana perubahan kualitas lingkungan sebelum industri pertambangan beroperasi (rona lingkungan awal) yang dibandingkan dengan kualitas lingkungan setelah operasi pertambangan, termasuk industri pengolahan beroperasi (kondisi eksisiting). Metode penelitian yang dilakukan dengan cara pengambilan data primer kualitas air melalui pengamatanÂ langsung lapanganÂ dan analisisÂ laboratorium. Prosedur pengambilan contoh air dilakukan dengan mengacu kepada standar analisis laboratorium yang berlaku (SNI 06-2412-1991)Â TentangÂ Metode Pengambilan ContohÂ Uji Kualitas Air danÂ (SNI 03-7016-2004)Â TentangÂ Tata Cara Pengambilan ContohÂ Air dalam rangka Pemantauan Kualitas Air pada suatau daerah pengaliran air. Parameter yang diatur diantaranya, pH, TSS, Cu terlarut, Cd terlarut, Zn terlarut, Pb terlarut, Ni terlarut, Cr6+, Cr total, Fe terlarut, Co terlarut. Selain itu parameter fisik diukur di lapangan berupa pH,TDS, EC atau DHL, ORP serta suhu (T). Hasil pengukuran pH air berkisar 6,32-7,4; TDS 140-680 ppm; EC 280-1363 ÂµS/cm; temperatur 27,4-35oC.Â  Berdasarkan pengujian laboratorium air sungai dari dua lokasi untuk parameter logam seng (sampel SK-01 dan SK-02) dan tembaga (sampel SK-02) sudah melewati baku mutu. Kandungan nitrat dari pinggir pantai bermuaranya limbah perusahaan sudah sama dengan baku mutu, 0,008 mg/L.Kata kunci: Kualitas lingkungan, kondisi eksisting, pH, rona awal
KARAKTERISTIK FISIKOKIMIA DAN ORGANOLEPTIK KERUPUK AMPAS TAHU DENGAN PENAMBAHAN IKAN NILA (Oreochromis niloticus)
Authors: Aziz Muhammad , Albaar Nurjanna , Rasulu Hamidin
Published: December 2024

Tofu dregs are byproducts generated during the manufacturing of tofu, derived from the pressing and compressing of soybean pulp. A byproduct of tofu production is tofu dregs. The physicochemical and organoleptic characteristics of tofu dregs crackers with the addition of tilapia (Oreochromis niloticus) are the subject of this research. A completely randomized design (CRD), which used 1 factor, 5 treatments and 3 replications, used a mixture of tofu dregs and tilapia fish. The concentrations of tofu dregs and tilapia meat (P) are as follows: 90%: 10%; 80%: 20%; 70%: 30%; 60%: 40%; and 50%:50%. The results indicated that tofu dregs crackers significantly influenced each characteristic assessed: physical (fracture strength and swelling volume), chemical (water, ash, protein, fat, and carbs), and organoleptic (color, taste, scent, and texture) at p 0.05. In this study, treatment P1, which contained 90% tofu dregs and 10% tilapia, had physical test results such as a breaking force of 2.16 N/s and a swelling volume of 14.16%. On the other hand, organoleptic tests of color 3.79, taste 4.28, aroma 4.05, and texture 4.14 were obtained by treatment P1. The panelists found that the tofu dregs crackers treated in treatment P1 were more preferred. Because it meets the SNI requirements for fried crackers, the water content of 11.57% in P3 is the best result. Keywords: Tofu dregs, crackers, physicochemistry, organoleptic, tilapia
Karakteristik Mikrobiologi dan Orgaoleptik Air Mineral Dalam Kemasan (AMDK) Merek Khairunqu pada Kemasan Botol dengan Penggunaan Berbagai Cartridge Filter
Authors: Kamaluddin Abdul Kadir , Mansur Sukri , Rasulu Hamidin
Published: December 2024

Drinking water is one of the most essential human need. As society advances and living standards rise, the amount of water available keeps growing. Purchasing clean water for domestic purposes, such drinking and bathing, must adhere to national and local laws as well as international standards (APHA and WHO). Determining consumer preference for Khairunqu Bottled Mineral Water (AMDK) goods and the degree of microbiological contamination present in bottled AMDK products are the two main objectives of this study. In compliance with SNI 3553:2015, cartridge filter type treatment was used in this study.  A quantitative descriptive method is used in this study. This study investigated five different therapies. Using cartridge filters to create Khairunqu Bottled Mineral Water (AMDK) in bottles with organoleptic and microbiological characteristics is one of these methods. The findings indicate that the mineral water's organoleptic properties in Khairunqu bottles with different filter cartridges are as follows: color 5.63-5.87 (neutral), taste 5.71-6.0 (slightly), and odor 5.57-5.75 (neutral). The initial ALT temperature was 36°C ±2°C (1.0 x 101).Keywords: Bottled Mineral Water, Cartridge Filter
PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING (PBL) TERHADAP HASIL BELAJAR SISWA PADA MATERI HUKUM DASAR KIMIA DI SMA NEGERI 10 HALMAHERA SELATAN
Authors: Ramadhan Sahrul , Ibrahim Fitriana , Mauraji Ilham SW , - Merlin , Umar Sudir
Published: December 2024

AbstrakPenelitian ini dilakukan untuk mengetahui pengaruh dari model pembelajaran Problem Based Learning (PBL) terhadap hasil belajar siswa pada materi hukum dasar kimia di SMA Negeri 10 Halmahera Selatan. Jenis dari penelitian ini adalah penelitian eksperimen dengan desain one group pretest posttest. Populasi dalam penelitian ini adalah seluruh siswa kelas X, sampel dalam penelitian ini terdiri dari 18 siswa dengan teknik penentuan sampel menggunakan teknik sampling purposive. Instrumen yang digunakan dalam penelitian ini berupa tes menggunakan soal essay sebanyak 12 soal. Data yang diperoleh kemudian dianalisis menggunakan SPSS 21. Hasil uji hipotesis dalam penelitian ini diperoleh menggunakan uji paired sample T test dengan hasil Thitung Ttabel (8,915 1,734) maka Ha diterima dan Ho ditolak sehingga model pembelajaran problem based learning berpengaruh terhadap hasil belajar siswa dengan nilai gain 0,31 dalam kategori sedang. AbstractThis study was conducted to determine the effect of the Problem Based Learning (PBL) learning model on student learning outcomes on basic chemical law material at SMA Negeri 10 South Halmahera. This type of research is experimental research with a one group pretest posttest design. The population in this study were all class X students, the sample in this study consisted of 18 students with the sampling technique using purposive sampling technique. The instrument used in this study was a test using essay questions as many as 12 questions. The results of hypothesis testing in this study were obtained using the paired sample T test with the results of Tcount Ttable (8.915 1.734) then Ha was accepted and Ho was rejected so that the problem-based learning model had an effect on student learning outcomes with a gain value of 0.31 in the medium category.
Analisis Hasil Belajar Siswa Kelas X SMA Negeri 1 Sanana Pada Materi Struktur Atom
Authors: La Muhammad Haryani , Limatahu Nur Asbirayani , Merlin Meriln , Sriwahyuni Elsa
Published: December 2024

ABSTRAKPenelitian ini dilakukan untuk mengetahui hasil belajar dan faktor-faktor yang mempengaruhi hasil belajar siswa kelas X SMA Negeri 1 Sanana dalam memahami materi Struktur Atom. Jenis penelitian adalah deskriptif. Populasi dalam penelitian ini adalah seluruh siswa kelas X SMA Negri 1 Sanana yang terdiri 189 siswa dan sampel dalam penelitian ini adalah siswa kelas X-6 SMA Negeri 1 Sanana berjumlah 20 siswa. Teknik pengambilan sampel yang digunakan adalah Cluster Random Sampling. Instrumen penelitian ini menggunakan instrumen tes dan nontes, berupa soal essay yang berjumlah 10 item dan angket berjumlah 15 item. Hasil penelitian menunjukkan bahwa hasil belajar kimia siswa kelas X SMA Negeri 1 Sanana pada materi struktur atom tiap siswa berada pada kategori sangat rendah dengan persentase 85%. Faktor-faktor yang mempengaruhi hasil belajar siswa kelas X SMA Negeri 1 Sanana setelah mempelajari materi  struktur atom sangat rendah adalah faktor internal yang berada pada aspek minat dan konsentrasi belajar dengan nilai persentase 65%, sedangkan untuk faktor eksternal terletak pada aspek fasilitas sekolah dengan persentase terendah 65%. Kata Kunci : Hasil Belajar, Faktor-Faktor yang Mempengaruhi, Struktur Atom. ABSTRACTThis study was conducted to determine the learning outcomes and factors that affect the learning outcomes of grade X students of SMA Negeri 1 Sanana in understanding the material of Atomic Structure. This type of research is descriptive. The population in this study was all grade X students of SMA Negri 1 Sanana consisting of 189 students and the sample in this study was grade X-6 students of SMA Negeri 1 Sanana totaling 20 students. The sampling technique used is Cluster Random Sampling. This research instrument uses test and non-test instruments, in the form of essay questions totaling 10 items  and questionnaires totaling 15 items. The results showed that  the chemistry learning outcomes of grade X students of SMA Negeri 1 Sanana on atomic structure material for each student were in the very low category with a percentage of 85%. The factors that affect the learning outcomes of grade X students of SMA Negeri 1 Sanana after studying atomic structure material are very low internal factors that are in the aspect of interest and concentration of learning with a percentage value of 65%, while for external factors lie in the aspect of school facilities with the lowest percentage of 65%.Keywords : Learning Outcomes, Influencing Factors, Atomic Structure.
Some Fixed Point Theorems for the New Generalizations of $P$-Contractive Maps
Authors: Şahin Aynur , Demir Buse
Published: December 2024

In this paper, we introduce the enriched $P$-contractive and the enriched Suzuki-type $P$-contractive maps, and for such maps, we establish the existence and uniqueness of fixed points (fps) in the setting of normed spaces. Also, we introduce the generalized Suzuki-type $P$-contractive map and prove some fp theorems for this map in compact metric spaces. These results unify, generalize, and complement various comparable results in the literature.
A framework for the management of distributed energy resources to address the imbalance between electricity supply and demand based on social welfare maximisation
Authors: Yamazaki Tamaki , Takano Hirotaka , Asano Hiroshi , Tuyen Nguyen Duc
Published: December 2024

The authors propose a calculation method of parameters to manage distributed energy resource (DER). The proposed method takes into account the balance between power supply and demand. This paper, first, formulates the power transaction between retail electricity suppliers, especially those with the function of energy resource aggregators, and their customers under a framework of social welfare maximisation (SWM). In theory, the customers consume electricity to maximise their economic surplus under given retail electricity prices. The SWM framework enables us to measure the value of changes in the customers’ surplus resulting from cooperation in the DER management. On the basis of this characteristic, second, the authors derive rebate levels as the parameters in the DER management. The authors’ proposal benefits both the retailers and the customers.
Wireless inchworm using small tapped-inductor converter
Authors: Takashima Hayata , Torii Akihiro , Doki Kae , Mototani Suguru
Published: December 2024

This paper describes a wireless inchworm with a small battery and a control circuit which eliminate the effect of wiring tension. The inchworm consists of piezoelectric actuators and electromagnets. A converter with a high boost ratio is required to boost the voltage from the battery to the maximum applied voltage of the piezoelectric actuators. The boost converter with a tapped inductor achieves a high boost ratio of approximately 16.7. The input and output voltage for the resistive and capacitive load are measured experimentally. The wireless inchworm loads an onboard microprocessor which operates the electromagnets and piezoelectric actuators. The operation of the wireless inchworm powered by a small battery is described, and the linear displacement is measured. The experimental results show that the small battery can drive the wireless inchworm.
Hímen imperfurado com formação de hematocolpo: Relato de caso
Authors: Souza Gabriela Ewerling , Oliveira Neto Benedito de
Published: December 2024

Introdução: O hímen imperfurado é uma anomalia congênita rara que impede o fluxo menstrual normal, levando ao acúmulo de sangue no útero (hematometra) e na vagina (hematocolpo). Esta condição pode resultar em complicações graves, como dor pélvica intensa, distensão abdominal e retenção urinária. Objetivo: Relatar o caso de uma paciente adolescente com hímen imperfurado, destacando a importância do diagnóstico precoce e o uso de uma técnica cirúrgica não tradicional. Métodos: Coleta de dados foi realizada por meio de revisão do prontuário e exames de imagem da paciente. Resultados: Paciente do sexo feminino, 14 anos, apresentou sintomas de dor pélvica cíclica, distensão abdominal e retenção urinária. O diagnóstico foi confirmado por ultrassonografia e ressonância magnética, revelando hematometra e hematocolpo. A paciente foi submetida a uma himenectomia, sendo utilizada cirurgia de alta frequência para ressecção da membrana himenal em sua base. Esta técnica geralmente elimina a necessidade de pontos, pois a cauterização sela os vasos sanguíneos. No entanto, devido à permanência de uma área cruenta, foi necessário suturar a base do anel himenal com pontos simples. A cirurgia foi bem-sucedida, resultando na drenagem do sangue, com recuperação sem complicações. Conclusão: O diagnóstico precoce e o tratamento adequado do hímen imperfurado são essenciais para prevenir complicações graves e melhorar a qualidade de vida das pacientes. A conscientização e educação contínua dos profissionais de saúde sobre essa condição são fundamentais para assegurar que anomalias congênitas raras sejam reconhecidas e tratadas prontamente.
Endodontia minimamente invasiva
Authors: Spenassatto Janaina Ahmann , Ribeiro Rodrigo Gonçalves
Published: December 2024

Com a crescente preocupação a respeito da resistência de dentes tratados endodonticamente, bem como a devolução de sua função e estética e sua longevidade, esse artigo teve como principal objetivo realizar uma revisão literária com o intuito de reunir informações e comparar análises sobre preparos tradicionais, conservadores e ultraconservadores. Foram realizadas buscas por artigos em sites como Bireme, Scielo e PubMed com intuito de coletar informações para uma revisão literária. A preservação da estrutura dental é de grande importância para a longevidade do dente tratado endodônticamente. Porém alguns pontos devem ser levados em consideração, sendo um deles a capacitação do profissional para que seja realizada a técnica corretamente, bem como a limpeza efetiva do canal radicular. Concluiu-se, com essa revisão, que existe pouca diferença de acesso endodôntico conservador e ultraconservador em relação a resistência do dente. Além disso é necessário a conservação de dentina na porção cervical do dente, pois é a área que mais fragilizada, apresentando maior índice de fratura.
Prática de exercício físico e estado emocional em praticantes de CrossFit® durante a pandemia da COVID-19
Authors: Castro Nathalia Carneiro Christino Viana de , Santos Heliny Alves dos , Pimentel Clarice Fernandes , Santana Jessé Castelo Souza , Oliveira Franassis Barbosa de
Published: December 2024

A pandemia da COVID-19 trouxe diversas mudanças de hábitos devido às restrições estabelecidas por ordens governamentais. A prática de exercício físico foi afetada e trouxe impactos em diferentes níveis na vida das pessoas, entre elas, os praticantes de CrossFit. O presente estudo tem como objetivo avaliar o nível de atividade física e o estado emocional de praticantes de CrossFit durante a pandemia da COVID-19. A pesquisa foi realizada por meio de questionário enviado via link do Google Formulários em que o questionário tinha dados sociodemográficos, exercícios físicos e IPAQ-SF (International Physical Activity Questionnaire - Short Form) e DASS-21 (Depression Anxiety and Stress Scale - Short Form). Os resultados da pesquisa demonstraram que consumo de álcool e cigarro eletrônico foram afetados pela pandemia, redução mesmo que pequena no nível de atividade física e o estado emocional atingido negativamente devido o trauma proporcionado pelas diversas restrições e sentimentos desenvolvidos durante esse período.
PENGARUH PERHATIAN ORANG TUA DAN PERGAULAN TEMAN SEBAYA TERHADAP HASIL BELAJAR SISWA PADA MATA PELAJARAN PAI KELAS X DI SMK GEMA NUSANTARA BUKITTINGGI
Authors: Gifra Gifra , Yulia Rahman
Published: December 2024

Penelitian ini dilatar belakangi oleh terdapatnya kesenjangan nilai hasil belajar PAI yang mencolok antara siswa yang memiliki perhatian orang tua dan pergaulan teman sebaya yang bagus dan siswa yang meliki perhatian dan pergaulan teman sebaya yang kurang bagus. Berdasarkan latar belakang tersebut peneliti tertarik untuk melakukan penelitian mengenai pengaruh perhatian orang tua dan pergaulan teman sebaya terhadap hasil belajar siswa mata pelajaran PAI. Tujuan penelitian ini untuk mengetahui pengaruh perhatian orang tua terhadap hasil belajar PAI, untuk mengetahui pengaruh pergaulan teman sebaya terhadap hasil belajar PAI, untuk mengetahui signifikansi pengaruh perhatian orang tua dan pergaulan teman sebaya terhadap hasil belajar PAI. Hipotesis penelitian ini adalah terdapat pengaruh perhatian orang tua dan pergaulan teman sebaya terhadap hasil belajar PAI. Jenis penelitian ini adalah kuantitatif dengan menggunakan korelasi (angket) .Populasi dalam penelitian ini adalah 49 orang siswa kelas X di SMK Gema Nusantara Bukittinggi. Hasil  penelitian ini adalah  terdapat pengaruh  signifikansi perhatian orang tua dan pergaulan teman sebaya terhadap hasil hasil belajar siswa pada mata pelajaran PAI kelas X di SMK Gema Nusantara Bukittinggi