bluuebunny/crossref_metadata_2025 huggingface dataset:
Damages and Repairs of Voided Concrete Precast Slab Bridge Girder
Authors: Abrar Aidil Abrar , Halimatusadiyah  , Yanti Gusneli
Published: August 2024

Tulisan ini mencakup analisis kerusakan retakan pada slab gelagar jembatan. Kerusakan diperkirakan terjadi pada sewaktu penanganan di transportasi, yaitu dengan menggunakan angkutan laut (kapal), dan/atau darat (trailer). Kerusakan tersebut berupa retakan pada bagian tengah bentang mulai dari serat-serat di atasnya. Seperti diketahui, komponen pada beton prategang menggunakan sistem di mana area komponen yang ditarik disusun  berdasarkan dengan memberikan tegangan tekan kepada kawat atau tendon, kemudian ditarik kembali ke bentuk semula. Artinya, tegangan tekan yang disebabkan oleh kawat atau tendon adalah gaya tekan yang aktif, berlawanan dengan beton bertulang. Tulangan bekerja secara pasif, karena hanya bekerja setelah beton ditarik dan retak. Desain beton prategang didasarkan pada kondisi elastis, dimana tegangan akibat gaya prategang, beban mati dan beban hidup dapat dijumlahkan secara matematis/aljabar. Artinya, kondisi tegangan dapat dipantau dengan pasti berdasarkan prinsip elastisitas. Hanya di beberapa area kritis kapasitas penampang perlu diperiksa; misalnya kapasitas momen pada pusat bentang dan kapasitas geser pada tumupuan/penempatan. Dengan demikian, komponen balok beton prategang merupakan komponen yang “hidup”, dalam arti distribusi tegangan sangat bergantung pada urutan pembebanan. Termasuk pada saat mengangkat, memindahkan dan membawanya dengan transportasi. Dari analisis yang diperoleh hasil total momen kawatnya pada saat transfer = 723,23 kN-m. Dengan demikian tegangan pada serat bagian atas adalah ftt = -1,94 MPa, Tegangan tarik ijin pada saat transfer (f)tt= -1,37 MPa , tegangan tarik pada serat bagian atas lebih kecil dari tegangan tarik yang diijinkan, keretakan terjadi dari serat bagian atas ke bawah secara vertikal. Perbaikan girder ini dapat dilakukan dengan material atau component utama setelah di lakukan perhitungan analisa beban.  Menggunakan epoxy Sikadur – 752 yang memiliki kualitas dan kekuatan prima, retakan yang terjadi kurang dari 2,0 mm dapat di epoksi dengan material ini. Dengan meggunakan perbaikan girder seperti ini, kekuatan kabel pratekan tidak berkurang secara signifikan.
Leaf functional traits and ecological strategies are important for the formation of subalpine fens and tall-herb plant communities
Authors: Gulov D. M. , Elumeeva T. G. , Fedorov N. I. , Poloshevets T. V. , Klink G. V. , Logvinenko O. A. , Dzhatdoeva T. M. , Onipchenko V. G.
Published: August 2024

Plant functional traits are important for the formation of plant communities and for plants’ ability to dominate there. The comparison of mean trait values of organisms within community with that for the random samples of the local biota allows estimating the importance of the trait for the formation of the community composition. The comparison of mean and community weighted mean values allow estimating their role for the dominance in any given community. We studied leaf functional traits (leaf area, mass, specific leaf area — SLA, leaf dry matter content — LDMC), as well as the contribution of Grime’s CSR strategies scores (competitors — stress-tolerators — ruderals) in two subalpine communities at the Teberda National Reserve (the North-Western Caucasus, Russia). Many leaf functional traits and plant strategies differ significantly in the fens and tall-herb communities from the random set of the species belonging to the local high mountain flora. The tall-herb community species have larger size (area and mass) of leaves, higher SLA and lower LDMC, as well as higher contribution of C and lower contribution of S and R strategies. The dominants of this community differ from the subordinate species by even larger leave size, lower SLA, higher LDMC higher C and lower R strategy scores. The plants of subalpine fens, in compare with random set of species, have smaller leaf size, lower SLA and higher LDMC, higher contribution of stress-tolerancy (S) and lower contribution of C and R strategies scores. In compare with subordinate species, the dominants of subalpine fens have even lower SLA and higher LDMC, higher S and lower R strategy scores. Thus, under the same climate conditions in depressions of mesorelief, but under the different hydrological conditions, in the subalpine belt of mountains there are plant communities with the contrasting functional structure. This underpins the important role of moisture conditions for the establishment of the spatial pattern of high mountain communities.
On the Equilibria of a Heavy Hoop Suspended on a Nail
Authors: Burov A. A. , Nikonov V. I.
Published: August 2024

We consider the plane problem of the equilibrium of a homogeneous heavy thin elliptical hoop suspended on a thin horizontal nail. Under the assumption that a dry friction force acts between the nail and the hoop, the dependence of the set of equilibrium positions on the friction coefficient and the semi-axes of the ellipse is studied. The results obtained apply to the following problem: to describe the equilibrium positions of a heavy solid (“gun”) suspended on a nail using a rope, both ends of which are fixed in the body. It is shown how such a distribution of results can be carried out directly in the case when the center of mass of the body is located in the middle between the suspension points.
Two Ways to Control a Pendulum-Type Spherical Robot on a Moving Platform in a Pursuit Problem
Authors: Mikishanina E. A.
Published: August 2024

We consider the problem of controlling a spherical robot with a pendulum actuator rolling on a platform that is capable of moving translationally in the horizontal plane of absolute space. The spherical robot is subject to holonomic and nonholonomic constraints. Some point target moves at the level of the geometric center of the spherical robot and does not touch the moving platform itself. The motion program that allows the spherical robot to pursue a target is specified through two servo-constraints. The robot can follow a target from any position and with any initial conditions. Two ways to control this system in absolute space are proposed: by controlling the forced motion of the platform (the pendulum oscillates freely) and by controlling the torque of the pendulum (the platform is stationary or oscillates inconsistently with the spherical robot). The equations of motion of the system are constructed. In the case of free oscillations of the pendulum, the system of equations of motion has first integrals and, if necessary, can be reduced to a fixed level of these integrals. When a spherical robot moves in a straight line, for a system reduced to the level of integrals, phase curves, graphs of the distance from the geometric center of the spherical robot to the target, the trajectory of the selected platform point when controlling the platform, and the square of the control torque when controlling the pendulum drive are constructed. When the robot moves along a curved path, integration is carried out in the original variables. Graphs of the squares of the angular velocity of the pendulum and the spherical robot itself are constructed, as well as the trajectory of the robot’s motion in absolute space and on a moving platform. Numerical experiments were performed in the Maple software package.
Studi Penambahan Serat Alam Daun Nanas Raja Pada Kuat Tekan dan Tarik Beton
Authors: Kaselle Hermana , Trisnawathy Trisnawathy , Asgar Ali , Ramadhan Azhar
Published: August 2024

Dengan menggunakan berbagai jenis serat yang berasal dari daun Nanas Raja (Agave Canula Roxb), penelitian ditujukan untuk menentukan kekuatan tekan dan kekuatan tarik beton Metode yang digunakan untuk perencanaan campuran beton adalah Department Of Environment (DOE) dengan material agregat kasar berasal dari Bili-bili, agregat halus dari Kabupaten Pinrang dan daun Nanas Raja dari Kabupaten Enrekang. Panjang serat ditentukan sebesar 12 milimeter mengikuti panjang serat sintetis yang biasanya digunakan pada campuran beton. Hasil penelitian menunjukkan kekuatan beton dapat meningkat pada kadar penambahan serat tertentu. Pada variasi 0,3% penggunaan serat pada beton diperoleh kuat tekan dan tarik belah  beton tertinggi dengan nilai masing-masing 31,655 MPa dan 3,23 MPa, lebih tinggi 5,51% untuk kuat tekan dan 26,17% untuk kuat tarik belah.dari kekuatan beton normal.
Meta-Analisis: Validitas Pengembangan E-Booklet Pembelajaran Biologi untuk Peserta didik SMA
Authors: Ayunda Sonia Nurul , Lufri
Published: August 2024

Perkembangan teknologi informasi dan komunikasi yang pesat telah membawa dampak signifikan terhadap sektor pendidikan di Indonesia. Pembelajaran saat ini menuntut guru untuk menggunakan media pembelajaran yang memanfaatkan teknologi dengan tepat. Salah satu media yang dapat digunakan adalah e-booklet. Penelitian ini bertujuan untuk menganalisis validitas e-booklet sebagai media pembelajaran biologi yang dihasilkan pada penelitian pengembangan yang telah dipublikasikan. Penelitian ini menggunakan metode meta-analisis dengan menelusuri artikel-artikel sumber melalui Google Cendekia. Sampel yang digunakan terdiri dari 10 jurnal yang berhubungan dengan pengembangan e-booklet. Komponen validitas yang dianalisis meliputi isi, bahasa, penyajian, dan kegrafikan. Hasil meta-analisis menunjukkan bahwa e-booklet memiliki tingkat validitas sebesar 90,12%, yang dikategorikan sangat valid. Oleh karena itu, e-booklet layak digunakan dalam pembelajaran biologi dan direkomendasikan untuk digunakan pada pembelajaran biologi.
The Moderating Effects of Urban Design on Willingness to Walk in a Tropical City
Authors: Zacharias John
Published: August 2024

Walkability and the willingness to walk (WTW) are enhanced with supportive urban design in temperate climate cities. Walking in a tropical city is challenged by the physiological stresses brought on by high air temperature, intense sunlight and humidity but it remains unknown to what extent urban design compensates for these stressors in walking behaviour. In this study, the relative impacts of the walking environment and microclimate on WTW and on walking distance were measured in a field study in Singapore. Participants executed a planned walk and reported assessments of 10 environmental factors, as well as WTW, at assigned locations. Restoration in WTW was observed at certain points on the itinerary across participants, while total voluntary walked distance equalled that of an indoor, air-conditioned walk at the same location. All environmental design variables showed a positive relationship with WTW, but not with objectively measured temperature and humidity. Urban design has a significant impact on willingness to walk in a tropical city.
Time Series Model Using Autoregressive Integrated Moving Average (ARIMA) Method For Inflation In Indonesia
Authors: Safwandi
Published: August 2024

Inflation are related to changes in the price of an item that have the potential to change the market in the short term and create a certain monetary policy. Inflation data tends to fluctuate from time to time, so it is interesting to make useful predictions to provide information on future inflation rates. The consumer price index indicator, which is the best benchmark for inflation, is the main inflation indicator. This research focuses on time series modeling using the autoregressive integrated and moving average (ARIMA) method. Fluctuating data results in the desired model determination and forecasting is carried out so that it is likely to occur in the future. The results showed that inflation predictions for the period January 2010 to December 2022 were obtained using the autoarima model (0,1,1)(1,0,2)[12] with an error value of MAPE 6.61%, RMSE of 0.42 with a p-test level value α=5%. From the prediction results, it is obtained that the average in the first quarter is 5.44% in the coming year and gradually decreases with a range of 3% - 4%.
Faktor-Faktor Yang Mempengaruhi Tingkat Kesejahteraan Masyarakat Nelayan Kampung Kuala Peunaga Aceh Tamiang
Authors: Sumarni Mutia , Ade Fadillah FW Pospos  , Suriani
Published: August 2024

Tujuan penelitian ini adalah untuk mengetahui apakah tingkat pendapatan (x1), pengeluaran konsumsi(x2) dan cuaca (x3) mempengaruhi kesejahteraan masyarakat nelayan (Y). Metode penelitian ini menggunakan metode kuantitatif dengan analisis regresi linear berganda, sampel dalam penelitian ini 69 orang. Hasil penelitian ini menyatakan bahwa pendapatan berpengaruh positif dan signifikan terhadap tingkat kesejahteraan masyarakat nelayan dengan nilai thitung  3.132 dan nilai signifikan  0.003, pengeluaran konsumsi tidak berpengaruh positif dan tidak signifikan terhadap tingkat kesejahteraan masyarakat nelayan dengan nilai thitung  1.301 dan nilai signifikan 0.198 dikarenakan masyarakat nelayan Kampung Kuala Penaga mempunyai pola konsumsi yang konsumtif, dan ketika penghasilan mereka banyak, mereka tidak berfikir menyimpan uang tersebut, selagi mereka ada uang mereka membeli apa yang mereka inginkan, ketika musim paceklik mereka pada berhutang. dan cuaca berpengaruh positif dan signifikan terhadap tingkat kesejahteraan masyarakat nelayan dengan melihat nilai thitung 2.209 dan nilai signifikan 0.31. dan secara uji simultan tiga variabel independen berpengaruh terhadap variabel dependen dengan F Hitung  15.388 dan nilai signifikan 0.000 dan dapat dilihat dari nilai adjusted R Square (koefisien determinasi) sebesar 0.388 yang artinya pengaruh variabel independen (X) terhadap variabel (Y)  sebesar 38.8%.
Hubungan Capital Adequacy Ratio, Inflasi dan Kurs Terhadap Non Performing Financing Sektor UMKM Pada Perbankan Syariah
Authors: Runa Wardani  , Muhammad Yahya
Published: August 2024

This study aims to determine the relationship in causality, short-term and long-term relationships as well as the variable response of Capital Adequacy Ratio, inflation, exchange rates and Non-Performing Financing of the MSME sector in Islamic banking in Indonesia. The data sources used in this study are secondary data sources obtained from OJK and BI which were published for 6 consecutive years as many as 72 samples. The data analysis method in this study uses Vector Error Correction Model (VECM) analysis for short-term and long-term analysis of the influence between variables. The results revealed that there is a long-term influence of Capital Adequacy Ratio and Inflation variables on Non-Performing Financing. Meanwhile, in the short term, the variable Capital Adequacy Ratio and inflation do not affect Non-Performing Financing. On the other hand, in the long and short term, there is no influence of exchange rate variables on Non-Performing Financing. Furthermore, Capital Adequacy Ratio, Inflation and exchange rates simultaneously affect Non-Performing Financing in the MSME sector in Islamic banking in Indonesia. The implications of these findings can be the basis for Islamic banks and regulators to develop more effective policies in managing NPF risk and supporting the growth of the MSME sector.
 
 
Penelitian ini bertujuan untuk mengetahui hubungan secara kausalitas, hubungan secara jangka pendek dan jangka panjang serta respon variabel Capital Adequacy Ratio, inflasi, kurs dan Non Performing Financing sektor UMKM pada perbankan syariah di Indonesia. Sumber data yang digunakan dalam penelitian ini adalah sumber data sekunder yang diperoleh dari OJK dan  BI yang di publish selama 6 tahun berturut-turut sebanyak 72 sampel. Metode analisis data dalam penelitian ini menggunakan analisis Vector Error Correction Model (VECM) untuk analisis jangkan pendek dan jangka panjang pengaruh antar variabel. Hasil penelitian mengungkapkan bahwa terdapat pengaruh secara jangka panjang variabel Capital Adequacy Ratio dan Inflasi terhadap Non Performing Financing. Sedangkan dalam jangka pendek variabel Capital Adequacy Ratio dan inflasi tidak berpengaruh terhadap Non Performing Financing. Di sisi lain, secara jangka panjang maupun jangka pendek, tidak terdapat pengaruh variabel kurs terhadap Non Performing Financing. Selanjutnya, Capital Adequacy Ratio, Inflasi dan kurs secara simultan berpengaruh terhadap Non Performing Financing sektor UMKM pada perbankan syariah di Indonesia. Implikasi dari temuan ini dapat menjadi dasar bagi perbankan syariah dan regulator untuk mengembangkan kebijakan yang lebih efektif dalam mengelola risiko NPF dan mendukung pertumbuhan sektor UMKM.
The Impact of Mudharabah Sukuk and Foreign Exchange on the Profitability of Islamic Commercial Banks in Indonesia
Authors: Safarida Nanda , Muhammad Alfian , Fahriansah  , Sabda Aulya
Published: August 2024

This study aims to determine the effect of Sukuk Mudharabah and Foreign Exchange on the profitability of Islamic commercial banks in Indonesia from 2014 to 2021. The data analysis technique used is panel data regression with the assistance of Econometric Views (Eviews). The results of the study indicate that Sukuk Mudharabah has a negative and insignificant effect on profitability (sig value. 0.413 > 0.05).  Foreign exchange has a positive and significant effect on profitability (sig value. 0.024 <0.05). Additionally, sukuk mudharabah and foreign exchange both have a positive and significant effect on the profitability of Islamic Commercial Banks in Indonesia (sig value. 0.00 <0.05). These results demonstrate the impact of foreign exchange on Islamic Commercial Banks in Indonesia.
Effect of thermal processing on the synthesis of the phenolic resin from rice husk
Authors:   Department of Silicate Materials, Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), 269 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam, Kieu Kien Do Trung ,   Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam, Huynh Minh Ngoc ,   Department of Silicate Materials, Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), 269 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam; Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam, Nguyen Thuy Cam ,   Department of Silicate Materials, Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), 269 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam; Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam
Published: August 2024

Rice is a product that plays a vital role in our country's agriculture. In recent years, rice exports have contributed over 3.5 billion USD annually. However, the rice production industry also releases more than 9 million tons of rice husks annually. Part of the waste rice husk is processed by burning. Most of the remaining rice husks are not processed and are released into the natural environment. Disposing of rice husks has low economic efficiency and can cause environmental pollution. Therefore, taking advantage of this waste source for circular agriculture is a matter of concern. This study investigated the thermal processing for synthesizing phenolic resins from rice husks. The differential scanning calorimetry results show that the resin-forming reaction temperature is 150 oC. Different heat retention times (120, 150, 180, 210, and 240 minutes) at 150 oC were also investigated. The visual evaluation and determination of rice husk residue indicated that 180 minutes was the appropriate time to make phenolic resin from rice. husks at 150 oC. Under this condition, the formed plastic is solid and can be ground into fine particles; the remaining rice husk residue is low, accounting for 9.66% of the weight. The plastic reaction efficiency is almost unchanged if the heat retention time is longer than 180 minutes (210, 240 minutes). The Fourier Transform Infrared Spectroscopy spectrum analysis results show that the main functional groups of the resin are CHn, C=C, C-H, OH, and aromatic rings. These functional groups are similar to the functional groups in the structure of commercial phenolic resins. Liquefied wood can be applied to treat rice husk waste in our country. This treatment method can also contribute to improving the value of rice trees.
Manufacturing Thermal-resistant Aluminum Alloy Wire for Overhead Line Conductor
Authors:   Faculty of Materials Technology, HCMUT–VNUHCM, 268 Ly Thuong Kiet, Ward 14, District 10, Ho Chi Minh City, Vietnam, Huynh Cong Khanh , ly Thai Phap ,   Faculty of Materials Technology, HCMUT–VNUHCM, 268 Ly Thuong Kiet, Ward 14, District 10, Ho Chi Minh City, Vietnam, Do Thanh Toan ,   Faculty of Materials Technology, HCMUT–VNUHCM, 268 Ly Thuong Kiet, Ward 14, District 10, Ho Chi Minh City, Vietnam
Published: August 2024

One of the overhead line conductor’s tasks is to ensure high electrical conductivity and high tensile strength after repeated heating to 180 oC. However, conventional aluminum conductor steel reinforced (ACSR) does not meet the above requirements (operating temperature ≤ 90 oC). To solve this problem, foreign countries have used Zr-bearing aluminum alloy, adding other alloying elements, such as Si and Fe, to manufacture thermal-resistant wire for overhead line conductors. This paper aim is to study the manufacturing process of thermal-resistant Al-Zr-Si-Fe alloy wire for overhead line conductors. Al-Zr-Si-Fe alloy was manufactured in the electric furnace and then cast in the permanent mold. Al-Zr-Si-Fe alloy billets were extruded to a diameter of 4.5-4.7 mm at 470 oC. After that, the extruded rods were cold-drawn to a diameter of 2.5 mm. The wire samples were annealed for 10 hours in an electric furnace at a temperature ranging from 350 oC to 450 oC. The as-cast Al-Zr-Si-Fe alloy microstructures show that the alloy grain morphologies are fine and equiaxed, and there are no Al3Zr crystals in the alloys. The electrical resistivity of the as-drawn Al-Zr-Si-Fe alloy wire is high because zirconium completely dissolves in an aluminum solid solution. After annealing the wire at 350 oC, the tensile strength of the wire decreases, and elongation slightly increases due to the reduction of lattice distortions. Resistivity slightly decreases because the metastable Al3Zr particle precipitation from aluminum solid solution is relatively slow at temperatures < 400 °C. At an annealing temperature of 400–450 oC, the tensile strength increases significantly, the elongation slightly decreases, and the resistivity noticeably decreases due to the precipitation of metastable Al3Zr (L12) particles. After annealing at 450 oC for 10 hours, the mechanical, electrical, and thermal-resistant properties of the wire meet the AT1 type requirements of standard IEC 62004.
Crosslinked hydrogel based on Polyvinyl alcohol/chitosan/glyoxal for the removal of Crom(VI) ions from aqueous solution
Authors:   Faculty of Materials Technology - Ho Chi Minh City University of Technology - Vietnam National University Ho Chi Minh City, Viet Nam, Nguyen Thi Thao Bui , Nguyen Giao Thi Quynh ,   Faculty of Materials Technology - Ho Chi Minh City University of Technology - Vietnam National University Ho Chi Minh City, Viet Nam, Nguyen An Duc ,   Faculty of Materials Technology - Ho Chi Minh City University of Technology - Vietnam National University Ho Chi Minh City, Viet Nam, Nguyen Tru Nhi ,   Faculty of Materials Technology - Ho Chi Minh City University of Technology - Vietnam National University Ho Chi Minh City, Viet Nam
Published: August 2024

This article describes an effective method to remove pollutants from wastewater using crosslinked hydrogels based on polyvinyl alcohol and chitosan. Glyoxal was used as the crosslinker for the hydrogels. The reaction between glyoxal and PVA as well as chitosan was conducted at 80oC for 90 minutes, contributing to the formation of the hydrogels which act as absorbents for removing Cr(VI) ions from the aqueous solution. The adsorption process was progressed at about 32oC and pH 7, in which the hydrogel samples were soaked in the Cr(VI) solution until the adsorption reached equilibrium state. The characterization of hydrogels was discovered with using various analytical techniques, including scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), UV–visible spectrophotometry (UV-Vis), and energy dispersive X-rays (EDX). The equilibrium adsorption isotherm analysis for Cr(VI) ions was researched by using Langmuir and Freundlich equilibrium isotherm models. The pseudo-first and pseudo-second-order kinetic models were studied for investigating adsorption kinetics. The microstructural surface of the hydrogel with the pores of 10 – 50 m was revealed by SEM images. EDX analysis confirmed the existence of Cr(VI) ions on the hydrogel surface after adsorption. The adsorption capacity and removal efficiency were studied with the various initial concentrations of Cr(VI) solutions, from 10 - 50 (mg.L-1). The maximum adsorption capacity was about 344 (mg.g-1) and the removal efficiency was from 82.35 % to 89.99 %. About adsorption isotherm and kinetics, the experimental data were consistent with Langmuir isotherm model and agreed with the pseudo-second-order kinetics. These results showed the presence of the Cr(VI) ions monolayer on the hydrogels and existence of chemical interaction between metal ions and the hydrogels during the adsorption process. Therefore, the PVA/chitosan/glyoxal hydrogels could be effectively used as an application in removing Cr(VI) from wastewater.
Study on the fabrication and investigation of the structural, optical and photocatalytic properties of Co2+, Ni2+ co-doped ZnO nanomaterials
Authors:   School of Chemistry and Life Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, Vietnam, Ta Ngoc Dung , Nguyen Mai Thi Tuyet ,   School of Chemistry and Life Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, Vietnam, Nguyen Dang Chinh ,   School of Chemistry and Life Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, Vietnam
Published: August 2024

In this study, Co2+, Ni2+ co-doped ZnO nanomaterials (Co,Ni-ZnO NMs) were successfully fabricated by hydrothermal method at low temperature at 90oC for 12 hours. Co2+ and Ni2+ ions were doped into the ZnO nanomaterials at ratios of 1 mol% and 2 mol%, respectively (calculated compared to the number of moles of Zn2+). The methods used to study on the structure and properties of materials such as XRD, SEM/ EDX and UV-vis spectra. The results showed that the fabricated materials were in the form of wurtzite single-phase and nanometer structure. The optical band gap energy (Eg) of Co, Ni-ZnO NMs was determined based on to the Kubelka–Munk equation and achieved a the value of 3.17 eV. The Eg of undoped ZnO was about of 3.34 eV. Reducing this optical gap energy of the material is desirable in research on semiconductor materials with the aim to improve the applicability of materials that are responsive under irradiation of light shifted to visible region. Besides, the results also showed that the ZnO nanomaterials co-doped with Co2+ and Ni2+ achieved a photocatalytic efficiency for degradation of the methylene blue (MB) dye solution in the visible light regions. Thus, ZnO material co-doped with Co2+ and Ni2+ ions has achieved superiority in optical applications stimulated by visible light (undoped ZnO material only achieves optical applications in the ultraviolet light region). The rate constant for the MB dye photocatalytic decomposition reaction had been determined according to the Langmuir Hinshelwood (L-H) kinetic model. This decomposition rate constant of the fabricated samples all complied with the first-order kinetic model with a high R2 correlation coefficient (achieved above of 0.92). The rate constant of the Co,Ni-ZnO NMs sample was approximately 17.8 times larger than that of the undoped ZnO sample (achieved 0.006204 and 0.0003471 min-1, respectively).
Ciri makroskopis dan sifat fisis kayu lontar (Borassus flabellifer Linn.) asal Pulau Timor berdasarkan posisi batang
Authors: Davinsy Rynaldo , Pobas Melkianus , Adrin Adrin
Published: August 2024

Lontar (Borassus flabellifer Linn.) adalah salah satu jenis pohon daerah tropis yang termasuk family palmae atau Arecaceae yang tumbuh terutama di daerah kering. Lontar dikenal memiliki banyak manfaat seperti bahan konstruksi bangunan alternatif pengganti kayu solid khususnya di Pulau Timor, Provinsi Nusa Tenggara Timur. Kendala sekarang pemanfaatan kayu lontar asal Pulau Timor sebagai bahan bangunan masih belum diketahui kelas kekuatan. Oleh karena itu, ciri makroskopis dan sifat fisis menjadi tujuan penelitian ini. Posisi batang (pangkal, tengah, ujung) akan mempengaruhi kekuatan kayu. Kayu lontar berumur ±30 tahun, batang yang sehat memiliki diameter (bagian pangkal 43, tengah 23 cm, dan ujung 32 cm). Sampel kayu dipotong menjadi contoh uji bagian kecil (ukuran 2cm x 2cm x 5cm). Pengujian yang dilakukan meliputi ciri makroskopis dan sifat fisis. Hasil pengujian menunjukan ciri makroskopis meliputi lingkar tahun, tekstur dan kesan raba, arah serat, warna dan corak, kilap, bau/aroma, kekerasan, dan bentuk parenkim dasar. Nilai sifat fisis kerapatan yaitu0.927 g/cm3 (bagian pangkal), 0.754 g/cm3 (bagian tengah), 0.645 g/cm3 (bagian ujung), kadar air yaitu 35.49% (bagian pangkal), 30.85% (bagian tengah), 66.77% (bagian ujung), pengembangan tebal yaitu 0.048% – 0.314% pada pengembangan tebal 2 jam, dan 0.289 – 0.488% pada 24 jam, dan daya serap air pada perendaman 2 jam berkisar 7.670 – 32.205% dan perendaman 24 jam berkisar 18.233 – 50.251%.
Pengaruh Distribusi Air Dan Kualitas Air Terhadap Kepuasan Pelanggan Perumdam Tirta Pandalungan Kabupaten Jember
Authors: Subekti Eko Prasetyo
Published: August 2024

Perumdam Tirta Pandalungan Kabupaten Jember merupakan perusahaan air minum yang seringkali tidak ada aliran airnya, agak keruh dan masih berbau kaporit. Keluhan yang paling umum adalah waktu yang dibutuhkan untuk memasang sambungan air minum pelanggan dan sering terjadi masalah dengan distribusi sehingga jumlah air yang diterima pelanggan tampaknya menurun. Tujuan dari penelitian ini adalah untuk mengetahui kepuasan pelanggan perusahaan, menentukan pendistribusian air dan menganalisis kualitas air berdasarkan keluhan yang dihadapi perusahaan. Metode yang digunakan dalam penelitian ini adalah kuantitatif, teknik pengambilan sampel penelitian ini adalah teknik non-probability sampling dengan menggunakan purposive sampling. Uji validitas dan reliabilitas diajukan untuk 96 responden. Data kuantitatif disajikan dalam bentuk tabel statistik frekuensi. Pengujian dilakukan dengan menggunakan program SPSS versi 24 yang memiliki uji statistik untuk analisis regresi berganda. Berdasarkan penelitian, hasil kepuasan pelanggan menunjukkan bahwa sikap responden setuju dengan pelayanan yang diberikan dengan melihat informasi mengenai keluhan pelanggan yang dapat diselesaikan oleh perusahaan. Ini menunjukkan bahwa nilai default adalah 0,676. Artinya, jika X1 = 0 dan X2 = 0 maka besarnya variabel kepuasan pelanggan adalah 0,676. Nilai koefisien kualitas pelayanan (X1) sebesar 0,151 yang berarti bahwa pengaruh kualitas pelayanan (X1) terhadap kepuasan konsumen adalah sebesar 0,151 atau 15,1%. Sedangkan faktor inovasi pelayanan (X2) sebesar 0,605 atau 60,5% berpengaruh terhadap kepuasan pelanggan. Di antara kedua variabel independen tersebut, inovasi layanan memiliki dampak yang lebih besar terhadap kepuasan pelanggan. Hasil uji F menunjukkan bahwa nilai F hitung kedua variabel adalah 301,129 pada taraf signifikan 0,000. Hasil tersebut berada di atas nilai F tabel sebesar 3,09. Dari sini dapat disimpulkan bahwa kualitas pelayanan dan inovasi pelayanan secara simultan (bersamaan) berpengaruh positif dan signifikan terhadap kepuasan pelanggan. Hasil uji t menunjukkan bahwa kualitas pelayanan berpengaruh positif namun tidak signifikan terhadap kepuasan pelanggan.
Pengaruh Citra Lembaga Amal Dan Influencer Terhadap Keputusan Donatur Dengan Kepercayaan Sebagai Intervening
Authors: Khamil Abdul , Sanosra Abadi , Cahyono Dwi
Published: August 2024

Tujuan dilakukan penelitian ini dalam rangka untuk menganalisis dan menilai seberapa besar pengaruh langsung dan tidak langsung dari varibel citra lembaga amal dan influencer terhadap variabel dependen keputusan donatur dengan kepercayaan digunakan sebagai variabel intervening pada donatur aktif di kantor Lazismu se-eks karesidenan Besuki. Metode yang akan digunakan merupakan deskriptif kuantitatif dengan menggunakan kuisioner sebagai sumber data dari 250 responden. Hasil analisis data penelitian ini menggunakan Structural Equation Model (SEM) dengan dibantu aplikasi Smart PLS 3.2 untuk menunjukkan bahwa citra lembaga amal dan influencer berpengaruh secara signifikan terhadap kepercayaan dan keputusan donatur, serta terdapat pengaruh tidak langsung dari citra lembaga amal dan influencer terhadap keputusan donatur melalui variabel kepercayaan. Hipotesisnya tentang pengaruh citra lembaga amal dan influencer terhadap kepercayaan donatur melalui kepercayaan dapat diterima
Efektifitas Pemanfaatan E-Commerce Shopee Terhadap Keberlangsungan UMKM Mandailing Dimasa Pandemi Covid-19 (Studi Kasus Toko Mandailing Jakarta Selatan)
Authors: Rahma Nurur , Sujatna Yayat
Published: August 2024

Melihat adanya keberlangsungan UMKM dimasa pandemi covid-19 seperti UMKM Mandailing. Pandemi covid-19 menyerang semua sektor, terutama sektor ekonomi pada UMKM, dampak ekonomi ini terjadi tidak hanya di dalam negeri tetapi juga secara global. Dalam hal ini UMKM Mandailing mencari solusi bagaimana caranya dapat meningkatkan keberlangsungan UMKM dimasa pandemi covid-19, salah satu caranya yang dapat dilakukan adalah dengan mengubah proses bisnis yang semula konvensional (offline) menjadi digital (online) melalui E-Commerce Shopee Indonesia. Tujuan penelitian ini dilakukan untuk memganalisis efektivitas pemanfaatan E-Commerce sebagai media keberlangsungan UMKM Mandailing dimasa pandemi covid-19. Desain penelitian ini menggunkaan metode deskriptif kualitatif. Objek yang diteliti adalah Toko Mandailing dengan subjek pegawai Toko Mandiling sebanyak 4 orang. Analisis data menggunakan reduksi data, penyajian data, dan penarikan kesimpulan. Pemanfaatan E-Commerce berpengaruh secara simultan terhadap kinerja UMKM Mandailing. Hal ini berarti jika UMKM menggunakan E-Commerce secara bersama-sama maka akan dapat meningkatkan kinerja perusahaannya.
GAME SAINS UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KRITIS ANAK
Authors: Dewi Ruhita Puspita
Published: August 2024

Penelitian ini disebabkan oleh kemampuan berpikir kritis anak yang masih rendah dikarenakan pembelajaran di sekolah yang masih menggunakan pembelajaran yang berpusat pada guru (teacher center) dan tidak bervariatif. Penelitian ini bertujuan untuk meningkatkan kemampuan berpikir kritis anak usia 5-6 tahun melalui eksperimen sains sederhana. Penelitian ini dilaksanakan pada kelompok B di RA Al-Ikhlas Nurul Huda Cigalontang Kabupaten Tasikmalaya. Penelitian ini ditujukan pada anak kelompok B yang berjumlah 14 anak, terdiri dari 7 perempuan dan 7 laki-laki. Metode penelitian ini menggunakan Penelitian Tindakan Kelas (PTK) yang dilaksanakan dengan 3 siklus. Instrumen yang digunakan berupa lembar observasi kemampuan berpikir kritis anak usia 5-6 tahun. Dengan penelitian menggunakan eksperimen sains sederhana ini dihasilkan meningkatnya kemampuan berpikir kritis anak dilihat setiap siklus yang digunakan.
Role of Flow Cytometry in Diagnosis of Non-Hodgkin’s Lymphoma: A Study at RIMS, Ranchi, India
Authors: Sinha Suraj , Mahto Sunil Kumar , Raihan Md , Banerjee Saurav
Published: August 2024

Purpose: Non-Hodgkin’s lymphomas (NHL) are cancers of mature B, T and NK cells. Diagnosis of NHL is based on immunophenotyping by immunohistochemistry of excised lymph node or flow cytometric immunophenotyping.  FNA cytology with immunolabelled flow cytometry can in some circumstance serve as a replacement of open biopsy and conventional histology and immunohistochemistry.
Method: The present study consisted of 52 patients suffering from lymphoreticular malignancies who attended and/or were admitted in the Rajendra Institute of Medical Sciences, Ranchi, during the period from March 2020 to August 2021.
Results: Out of 54 cases suspicious of Lymphoreticular malignancy, 2 were found to be non-lymphoid origin by flow cytometry of fine needle aspirate and sample collection was inadequate in 3 cases (5.5%). On Immunophenotyping, 44 cases (88%) were found to be B-NHL and 5 cases (10%) were T-NHL. Furthermore, it was sublassified as DLBCL 16 cases (32.6%), FL 6 cases (12.2%), MZBCL 3 cases (6.1%), CLL/SLL 5 cases (10.2%), MCL 2 cases (4.08%), Unclassified B-NHL 12 cases (20.3%) and Mature T cell NHL 5 cases (10.2%).
Conclusion: Flowcytometry can be a great tool in diagnosis and classification of NHL and can be used alternatively to conventional excisional Lymph node biopsy and immunohisto-chemistry.
Keywords: Flow cytometry, immunophenotyping, Non Hodgkin’s Lymphoma, FNA cytology
TINGKAT KEDISIPLINAN MENAATI TATA TERTIB SISWA KELAS XI SMA NEGERI 14 SEMARANG
Authors: Muliawati Shinta , Rakhmawati Dini
Published: August 2024

Penelitian ini dilakukan untuk mengetahui tingkat kedisiplinan mentaati tata tertib siswa kelas XI SMA Negeri 14 Semarang. Kedisiplinan dalam menataati tata tertib ini merupakan bentuk kesungguhan suswa dalam belajar di sekolah. Siswa yang memiliki kedisiplinan tinggi identik dengan bagaimana cara mereka mengenakan seragam sekolah yang sesuai dengan aturan. Siswa yang memiliki perilaku disiplin akan menaati tata tertib sekolah dengan perasaan senang, suka rela, dan tanpa paksaan orang lain. Mereka akan melakukan hal tersebut terus menerus sehingga menjadi sebuah kebiasaan. Penelitian ini mengambil pendekatan kuantitatif dengan metode skala. Adapun strategi pengambilan sampel dalam penelitian ini menggunakan  probability sampling berdasarkan simple random sampling untuk memilih 268 siswa  kelas XI.  Hasil penelitian menunjukkan bahwa tingkat kedisiplinan mentaati tata tertib siswa kelas  XI di SMA Negeri 14 Semarang  tingkat presentase tertinggi yaitu 44,8%  sejumlah 120 siswa, kategori sangat tinggi yaitu 7,5% sejumlah 20 siswa, kategori tinggi 32,5% sejumlah 87, dan kategori rendah 41 siswa dengan presentase 15,3%. Hal ini dikarenakan berbagai hal diantaranya yaitu dari dalam diri siswa seperti pengetahuan, kesadaran, ketaatan, keinginan berprestasi, dan latihan berdisiplin. Faktor eksternal mencakup lingkungan, alat pendidikan, teman, saudara, kebiasaan dan pembinaan dari rumah, sarana yang menunjang, pengawasan, hukuman, nasihat, dan sebagainya. Simpulan penelitian ini yaitu rata-rata siswa memikili kriteria sedang dalam tata tertib di sekolah. Hal ini membuktikan bahwa masih adanya potensi siswa untuk melakukan aktivitas penyimpangan tata tertib sekolah.
TRANSLOG (Learning About Transportation And Logistic Maritim) : Media Pembelajaran Berbasis Tik-Tok
Authors: Fauzan Andra Ahmad , Baaqir Taufiqurrahman , Dewi Shania Amelia , Zetalia Shaqnas
Published: August 2024

The use of TikTok-based learning media as an interesting and effective alternative in facilitating student learning. In education, learning that still uses demonstrative methods such as oral delivery of material can be boring and reduce interest in learning. Therefore, it is necessary to make modifications in learning strategies so that students can more easily understand the material through digital media. Keywords:  Learning Media, Types of Learning Media, TikTok-Based Learning Media. In the context of learning, TikTok can be used as an interesting and effective learning medium. The advantages of using TikTok as a learning medium include flexibility, accessibility, a variety of content topics, easy repetition, and interactivity. Through the TikTok application, learners' skills in listening, reading, writing, and arithmetic can be developed. The research method used in this journal is a quantitative method that uses an approach with the calculation of numbers. This method involves observation and interviews as data sources. Observations were made on loading and unloading activities at the port, while interviews were conducted with related parties. The results and discussion of this journal show that the use of TikTok-based learning media can improve the quality of learning, especially in terms of selecting learning materials that are practical, innovative, and easy to understand. Digital learning environments, including the use of TikTok, can enhance interactive and engaging learning. TikTok-based learning about logistics transportation can be an interesting and effective alternative in helping students understand the topic.
Pemanfaatan Twitter Sebagai Media Promosi Terhadap UMKM
Authors: Pardede Besti Tiurmaida , Sihombing Ririsma , Devi Sherly Prissillia , Hidayat Chandra Bayu
Published: August 2024

This study examines how the influence of the use of social media Twitter in promoting small businesses (MSMEs). This research uses a literature study by reviewing previous research. This study uses a qualitative method with data processing using a literature review. The results obtained from this study indicate that the use of social media twitter has a fairly high and positive influence in promoting the MSME business, with the easy twitter feature and tapa budget being the choice of MSME businessme.
Pengaruh Love of Money, Ethical Sensitivity dan Moral Reasoning Pada Perilaku Etis yang dimoderasi Gender
Authors: N.A.R.Roy Emerentiana Ayu , Ratnadi Ni Made Dwi
Published: August 2024

The many problems concerning unethical conduct have had an impact, certainly considered one among that's lowering public consider in numerous professions. The studies objectives to decide the impact of love of money, ethical sensitivity, moral reasoning with gender as a moderator on moral conduct. Data became accrued via way of means of dispensing questionnaires to college students of the FEB Unud accounting undergraduate program. Samples had been taken via way of means of simple random sampling technique in order that 156 respondents had been obtained. The evaluation approach makes use of Moderated Regression Analysis. The research results indicate that love of money, ethical sensitivity, moral reasoning have a positive effect on the ethical behavior of accounting students. Furthermore, this research indicates that gender weakens the effect of love of money on students' ethical behavior, which means it can moderate, but not moderate the effect of ethical sensitivity and moral reasoning.
ANALISIS SEKTOR PARIWISATA SEBELUM DAN SESUDAH PANDEMI COVID 19 DILIHAT DARI JUMLAH TAMU HOTEL DI PROVINSI JAMBI
Authors: Santoso Agus , Hierdawati Trie , Dani Rian
Published: August 2024

The purpose of the first research on the condition of the tourism sector before and after the COVID-19 pandemic seen from the number of foreign hotel guests in Jambi Province where before the pandemic in 2017 to 2018 the number of foreign hotel guests increased by 5.59% with the number of hotel guests. of 8939 people, while for the conditions during the pandemic in 2019-2020, it experienced a very sharp decline of -73.69% with the number of hotel guests of 6759 people or a decrease compared to the two years before the pandemic, which was 2180 people. The two conditions of the tourism sector before and after the covid 19 pandemic were seen from the number of hotel guests in Jambi Province before the 2017-2018 pandemic, namely an increase of 16.47% per year or an increase in 2018 the number of hotel guests in the archipelago of 423,262 people with a total before the pandemic, hotel guests were 786,662 people. Meanwhile, the condition of the tourism sector before and after the COVID- 19 pandemic, seen from the number of hotel guests in Jambi Province during the pandemic, actually experienced a shock, namely in 2020 up to -38.08%.
Analisis Kinerja Keuangan Pemerintah Daerah Kabupaten Pamekasan Periode 2019 - 2021
Authors: Ayu Septian Nanda , Wahyuni Dewianti Dwi , Dwiningwarni Sayekti Suindyah
Published: August 2024

Analysis of the financial performance of the regional government of Pamekasan Regency in the period 2019 - 2021. Analysis of local government performance can be seen from the financial performance of an area. So to analyze the financial performance of a region by analyzing the financial ratios of the Regional Expenditure Budget (APBD) that have been set and have been implemented. This study aims to analyze the financial performance of the regional government of Pamekasan Regency in the period 2019 - 2021. The type of data used in this research is secondary data, so the type of research used in this research is descriptive quantitative using ratio analysis method. The results of the study show that the use of the regional government revenue budget for the Pamekasan district, seen from the analysis of the variance of the revenue budget for the 2019 - 2021 fiscal year based on the budget realization report, produces a positive balance value, meaning that the financial performance of local government revenues can be said to be good. So that the financial performance indicates that it has been able to obtain revenue in excess of the budgeted amount. The degree of decentralization that has occurred in Pamekasan district is relatively low so that financial dependence on the central government is relatively high. Meanwhile, in terms of the effectiveness ratio of PAD receipts in Pamekasan district, it can be concluded that during the 2019 - 2021 period it has been categorized as very effective because the PAD revenue target has exceeded the previous target.
Human Capital Management Analysis and Organizational Cultures for New Entrance in Mining Contractors Services Company – PT ANP
Authors: Christin Sagita Sendy , Hamdi Edi
Published: August 2024

Human Capital Management (HCM) is one of the factors that support the Company's sustainability. The Mining Contracting Service Company that PT ANP plans, require the superior human resources so that the business can run well, achieve the company's vision and mission, be able to win the competition and be sustainable. Various studies by organizational observers tend to acknowledge that organizational culture has a strong influence on the long-term performance and effectiveness of an organization. Empirical research has also produced a series about the importance of culture for improving organizational performance. Thus, culture is an important component in the ultimate success or failure of a business. Basically there are four types of corporate culture namely Hierarchy, Market, Clan and Adhocracy, for that in an effort to support the achievement of its vision and mission, PT ANP will encourage the application of corporate culture and values to every employee, including work clothes, company logos and office layout, so that employees will be able to produce optimal performance to achieve company success in accordance with company values, namely Ownership, Advances in Innovation, Motivation & Integrity, Ethics and Responsiveness.
Pengaruh Penyaluran Komoditas Jagung Terhadap Farmer’s Share Dan Keuntungan Hasil Usaha Tani Di Kabupaten Pamekasan
Authors: Selvia Kamilia Fitri  , Muh Syarif
Published: August 2024

Corn is one of the agricultural products of high value, a strong economy with growth potential. Although corn in Indonesia is the second most important food product after rice / rice. Marketing channels are the routes traveled by agricultural products when products move from farm gates, i.e. farmers, producers, to users or last users. The type of data obtained in the study consists of primary data and secondary data, primary data is data obtained directly from research respondents at the research location. In this study, primary data was obtained from corn farming in the form of primary data in the form of information about corn land area, corn cultivation. The harvest, the selling price and purchase price, and the marketing agency used. Primary data collection is carried out by means of Interviews, Observations, Documentation.