bluuebunny/crossref_metadata_2025_split huggingface dataset:
Validasi Metode Penentuan Mn Dalam Oli Lubrikan Dengan Metode Pengenceran Langsung Menggunakan Spektrofotometer Serapan Atom
Authors: Napitupulu Rona Maningting , Julia Dirgarini , Panggabean Aman S. 
Published: August 2024

Validation method on the determination of Mn in lubricating oil by direct dilution method using Atomic Absorption Spectrophotometer (AAS) in Laboratory & Environment Control PT. Badak NGL Bontang has been done The validation method was done with research stages such as determination of optimum solvent, and determination of some important parameters influential for validation method such as parameter of liniearitas (r), Instrument Detection Limit (IDL), Methode Detection Limit (MDL), accuracy, precision, Limit of Detection(LOD) and Limit of Quantitation(LOQ). The result of research obtain is good, showed that the linearity value with R2 â‰¥ 0,997. The IDL and MDL value was 0.0021 ppm and 0.0092 ppm respectively and has been acceptability requirements of MDL. The accuracy paramater obtained recovery value with range 82.25-88.34%. The measurement of repeatability and reproducibility, the CV Horwitz value smaller than % RSD, indicating the method had a good precision. The measurement of LOD and LOQ value was 0.095 ppm 0.317 ppm respectively. Based on the result of the research determination method of Mn in lubricating oil by direct dilution method using AAS concluded valid.
The Computational Calculation and Molecular Docking of Aeroplysinin-1 As Antibacterial
Authors: Maahury Mirella Fonda , Allo Veliyana Londong 
Published: August 2024

Aeroplysinin-1 is naturally found from marine sponges as an anti-bacterial compound. Computational calculation and molecular docking were performed for aeroplysinin. Aeroplysinin as an inhibitor has optimized in the gas phase using DFT with 6-31G(d) functional. The structure from geometry optimization of aeroplysinin-1is, not in one plane. The interaction of aeroplysinin-1 with two different DNA gyrase from E. Coli and S. Aureus. In this research,aeroplysinin-1 can inhibit the protein with the free binding energy of about -5.7 kcal/mol and -6.35 kcal/mol, respectively, for E. Coli and S. Aureus. The dominant molecular interaction is the hydrogen bond.
Silica Content Analysis of Rice Husks Siam Unus from South Kalimantan
Authors: Mujiyanti Dwi Rasy , Ariyani Dahlena , Lisa Muna 
Published: August 2024

Research on the analysis of rice husk content of Siam Unus with various NaOH concentrations (1.0 M; 1.5 M; 2.0 M; 2.5 M; 3.0 M) has been done. This study aims to obtain data on the effect of variations in NaOH concentration on the purity of the silica extract from Siam Unus rice husks and silica characterization of Siam Unus rice husks using Fourier Transform Infra-Red (FTIR) and X-ray fluorescence spectrometry (XRF). The results showed that the combustion of rice husks at 200 °C as the optimum temperature for 1 hour followed by combustion at 600 °C for 4 hours produces grayish-white rice husks with a yield is 20.70%. Silica functional group characterization showed that silanol (Si-OH) and siloxane (Si-O-Si) as dominant functional groups. The result of composition characterization using XRF showed that SiO2 is the dominant compound with the highest percentage of SiO2 is 1.5 M NaOH extract at 42.80%.
Pengenalan dan Pelatihan Microsoft Word Pada Siswa-Siswi Sekolah Dasar
Authors: Adriansah Axel Belliandri , Mozza Pramitha Amirah Balqis , Sahara Ferdina Lailatus , Athallah Sayyidah Nabighah , Marsela Rosita Trisna , Wardhanie Ayouvi Poerna 
Published: August 2024

Tujuan diadakannya kegiatan pelatihan ini adalah karena masih ditemukan sejumlah siswa SDN Semolowaru IV yang belum pernah mendapatkan pemahaman mendalam terkait penggunaan Microsoft Word. Pelatihan ini diadakan di SDN Semolowaru IV pada tanggal 20 Oktober dan 23 Oktober 2023 dengan melibatkan kelas VA dan VB dengan total 60 siswa-siswi. Metode pelatihan yang digunakan terdiri dari tiga tahap yaitu persiapan, pelaksanaan, dan evaluasi. Pada tahap persiapan kami melakukan survei tempat serta persiapan bahan materi. Tahap pelaksanaan, tim memberikan pre-test untuk mengukur pengetahuan mereka tentang Microsoft Word serta tim memberikan paparan materi mengenai Microsoft word, kemudian terdapat sesi praktik yang meliputi penggunaan font, ukuran font, perataan kanan, perataan kiri, dan warna saat menulis pada fitur home, dan terakhir terdapat sesi tanya jawab serta post test. Tahap evaluasi dilakukan pengolahan data hasil pemahaman peserta didik terkait Microsoft Word melalui hasil pengerjaan pre-test dan post-test yang telah dilakukan. Hasil pre-test menunjukkan siswa-siswi yang dapat menjawab benar dari kelas VA sebanyak 42,14% dan pada VB sebanyak 39,28%, sedangkan pada hasil post-test didapatkan siswa-siswi yang dapat menjawab benar dari kelas VA sebanyak 67,86% dan pada VB sebanyak 70%.
Exhibitionism and Law Enforcement: Criminal Law and Islamic Criminal Law Perspectives
Authors: Nafis Str Raihan Hadi , Azizah Noor 
Published: August 2024

Law enforcement against exhibitionists is crucial in maintaining public order and morality. This study examines law enforcement against exhibitionists based on criminal law and Islamic criminal law. The research method used is normative legal research with a statute and conceptual approach. The statute approach is employed to review existing laws and regulations. In contrast, the conceptual approach explores the principles of Islamic criminal law related to law enforcement against exhibitionism. The results of this study show that in the context of general criminal law, the Indonesian Penal Code (KUHP) regulates articles that can be applied to exhibitionists. Criminal sanctions stipulated in Articles 281 and 282 of the Penal Code include imprisonment and fines for those who distribute, create, or store obscene images, including those involving exhibitionism. Article 335 of the Penal Code also regulates indecent acts in public, which can include exhibitionism. According to Islamic criminal law, the form of punishment for exhibitionist behavior is jarimah ta'zir. Among the Syafi'iyah and Hanabillah scholars, it is argued that the maximum punishment is ten lashes. Meanwhile, according to the Malikiyyah scholars, the punishment of lashes may exceed this limit as long as it serves a beneficial purpose. This study concludes that law enforcement against exhibitionism requires integrating general and Islamic criminal law to create a balanced legal framework that aligns with societal values. Additionally, the importance of public awareness of the social impact of exhibitionism and participation in law enforcement is emphasized
Ignition Delay Period Prediction for Compression Ignition Engines Fueled with Ethanol/Diesel Blends
Authors: Ghareeb Hemin Othman , Anjal Hassan Abad Al-Wahab 
Published: August 2024

A key characteristic of diesel engines is predicting the ignition delay period. This work predicts the ignition delay in diesel engines using combinations of ethanol/diesel fuel blend and pure diesel as fuel replacements. It provides an empirical formula for predicting delay periods. A growing interest in alternative fuel blends, representing a substantial shift from the use of traditional diesel fuel, is reported. Modern study is focused on examining these combinations and how they might affect the dynamics of combustion in diesel engines. Experiments were carried out utilizing five different ethanol/diesel fuel blends, including pure diesel, with ethanol percentages varying from 5% to 20% in 5% quantities. Tests were conducted at a constant engine speed of 1,500 rpm, with various compression ratios of 16, 17, and 18, with torque levels ranging from 0 to 21 N.m. In this study, general formulas for predicting ignition delay are constructed numerically. There was a greater consistency between the experimental outcomes and the expected ignition delay. The findings indicated that the E20 combined fuel continuously exhibited the least igniting delay period across all compression ratio variables. The findings demonstrated that the ignition delay period starts to shorten with increased cetane number, ignition pressure, temperature, and equivalency ratio. A shorter period of ignition delay is the outcome of higher compression ratios. The predictive model created here is a ground-breaking addition to the industry, offering a solid foundation for assessing the efficiency and emissions properties of different ethanol/diesel blends.
Economic Analysis for Performance of Photovoltaic-Direct-Powered Solar Domestic Hot Water Systems Using Experimental Evaluation in Iraq
Authors: Atta Baneen , Ali A. F. Al-Hamadani  , Emad Jaleel Mahdi  
Published: August 2024

Photovoltaic (PV) systems can be used in a wide range of applications because of a significant drop in cost over the last ten years for PV modules. Because PV solar panels are low-cost and have a simple design that just requires sunshine to work, they can be used to power loads that are directly linked to PV panels. Because of this, it is a more alluring option for applications involving water heating.
In this work, experimental evaluation has been done for photovoltaic-direct-powered solar domestic hot water systems on 3/Jan./2024 a clear, sunny day. When evaluating performance, the value of power generated by PV panels is crucial. As solar radiation rises, its value rises as well. The PV heater tank's inside water temperature reached a maximum of 83.50 °C. A family of three members used 131 liters of water at a flow rate of 2 L/m. The maximum power delivered to the heating element was 1188 W, and the maximum power generated by PV panels was 1240 W. Based on the specifications of the 1500W heating element utilized, about 312W of electricity is lost during operation. Calculations revealed that the system's electrical efficiency was 22.3%. The system required 8.6 years of payback time to recoup its initial expenditure. Based on these results, it is advised to utilize a direct- connected photovoltaic water heater system (DPVWH) in cold weather because of its ease of use and efficiency, as it is a technology that operates during daylight hours.
A FERTIRRIGAÇÃO E O PROCESSO DE SALINIZAÇÃO DE SOLOS EM AMBIENTE PROTEGIDO
Authors: Silva Alexsandro Oliveira da 
Published: August 2024

A fertirrigação é uma das alternativas para o parcelamento da adubação em cultivos agrícolas, evitando perdas por lixiviação ou volatilização dos adubos, porém o seu uso excessivo e inadequado pode levar a salinização de solos, principalmente em casas de vegetação, pois o excesso de fertilizantes eleva a condutividade elétrica na solução do solo, causando redução na produtividade das culturas. No presente texto, foram revisados trabalhos que direta ou indiretamente, abordaram o efeito da fertirrigação excessiva e sua contribuição ao processo de salinização de solos sob ambiente protegido, que apresentaram informações sobre a tolerância das culturas à salinização e seu manejo conjunto com a fertirrigação. Palavra-chave: condutividade elétrica; solução do solo, fertilizantes. FERTIGATION AND SOIL SALINIZATION PROCESS IN GREENHOUSE ABSTRACT Fertigation is one of the options to split fertilizer application in crops, preventing fertilizers losses by leaching or volatilization, but its excessive and inappropriate use can lead soil salinization in greenhouses, because the fertilizer excess increases the electrical conductivity in soil solution, reducing crops yield. In this article, were revised studies that directly or indirectly address the effect of excessive fertigation and its contribution to the salinization process in soils under greenhouse, which showed information about the crops tolerance to salinization caused by fertilizers and their joint management with fertigation. Keywords: electrical conductivity; soil solution, fertilizers. DOI: http://dx.doi.org/10.14583/2318-7670.v02n03a10
CARACTERIZAÇÃO FITOSSOCIOLÓGICA DAS TIPOLOGIAS DA ÁREA DE INFLUÊNCIA DIRETA DO RESERVATÓRIO DA UHE SINOP
Authors: Simões Juliana Marestoni , Melo Karla Rodrigues de , Mews Cândida Lahis , Ferreira Leonor Souza , Henicka Tiago da Silva , Palermo Patrícia Regina Alves 
Published: August 2024

O objetivo deste trabalho foi avaliar os parâmetros fitossociológicos de acordo com a estrutura tipológica de um fragmento de floresta a ser inundado pelo reservatório da UHE Sinop. Foi utilizado como parâmetro CAP (Circunferência a Altura do Peito) > 30 cm e mensuradas todas as árvores existentes nessa classe em 200 parcelas (10 x 250 m), instaladas aleatoriamente, nas margens direita e esquerda do rio Teles Pires (100 parcelas em cada margem). Foram estimados para cada tipologia os seguintes parâmetros: densidade por área, dominância absoluta, frequência absoluta e índice de valor de importância. Observou-se que os valores de densidade foram maiores para as Formações Ripárias, embora a Floresta Associada ao Planalto dos Parecis tenha amostrado um total de 11.265 indivíduos arbóreos. No que tange a frequência das espécies, destaque para Sapium longifolium que foi encontrada em todas as parcelas amostradas, seguida por Inga nobilis. Outra espécie que apresentou frequência significativa foi Duguetia lanceolata. Palavras-chave: empreendimentos hidrelétricos, fitossociologia, formações florestais, Mato Grosso. PHYTOSOCIOLOGICAL CHARACTERIZATION ON THE DIRECT INFLUENCE AREA OF THE SINOP HYDROPOWER, MATO GROSSO, BRAZIL ABSTRACT The aim of this work was to evaluate the phytosociological parameters according to the typological structure of a forest fragment to be flooded by the reservoir of UHE Sinop (as per its acronym in Portuguese). The CBH parameter (Circumference at Breast Height) ≥ 30 cm was used, and all existing trees in this class in 200 plots (10 x 250 m), randomly installed, on the left and right banks of the Teles Pires river (100 plots in each bank), were measured. The following parameters were estimated for each typology: density per area, absolute dominance, absolute frequency and importance value index. It was observed that the density values were higher for the Riparian formations, although the forest associated to the Parecis Plateau has totaled a sample of 11,265 trees. Regarding the frequency of species, one should highlight the Sapium longifolium, which was found in all sampling plots, followed by Inga nobilis. Another species with significant frequency was the Duguetia lanceolata. Keywords: hydroelectric projects, phytosociology, forest formations, Mato Grosso. DOI: http://dx.doi.org/10.14583/2318-7670.v04n01a06
INITIAL GROWTH OF ‘PARICÁ’ (Schizolobium amazonicum) SEEDLINGS UNDER DIFFERENT NITROGEN DOSES
Authors: Carvalho Alaíde de Oliveira , Bergamin Anderson Cristian , Evaristo André de Paulo , Neves André Henrique Bueno , Carmo Cemilla Cristina Alves do , Guimarães Junior João Neri dos Santos 
Published: August 2024

CRESCIMENTO INICIAL DE MUDAS DE PARICÁ SOB DIFERENTES DOSES DE NITROGÊNIO O presente trabalho teve como objetivo avaliar os efeitos de diferentes dosagens de nitrogênio (N) sobre o crescimento inicial de mudas de paricá (Schizolobium amazonicum Huber ex. Ducke). O experimento foi conduzido em casa de vegetação e as mudas cultivadas em sacolas plásticas preenchidas com 5,0 kg de Latossolo Vermelho Amarelo, arranjados em delineamento inteiramente casualizado com cinco tratamentos e dez repetições. Testou-se as doses de 0, 40, 80, 120, 160 kg ha-1 de N. Avaliou-se aos 45 dias pós-transplante a altura, diâmetro do colo, massa fresca da parte aérea, da raiz e total e relação altura/diâmetro do colo. Todas as variáveis responderam de forma quadrática as doses de N aplicada. Até os 45 dias pós transplantio indica-se a dose de 84,66 kg ha-1 de N para obtenção de mudas com maior altura e 71 kg ha-1 de N para mudas com maior diâmetro. Palavras-chave: Schizolobium amazonicum, produção de mudas, nutrição mineral, adubação. ABSTRACT This study aimed to evaluate the effects of different dosages of nitrogen (N) about the initial growth of ‘paricá’ (Schizolobium amazonicum Huber ex. Ducke) seedlings. The experiment was conducted in a greenhouse and the seedlings cultivated in plastic bags filled with 5.0 kg of Oxisol, arranged in a completely randomized design with five treatments and ten repetitions. The nitrogen tests doses were 0, 40, 80, 120, 160 kg ha-1. The heights, stem diameter, fresh aerial matter, root and total and height/diameter stem, were evaluated at 45 days post-transplant. All variables responses in a quadratic way to N applied doses. Until 45 days post-transplant, it was indicated the dose of 84.66 kg ha-1 of N to obtain seedlings with greater height and 71 kg ha-1 of N seedlings with a larger diameter. Keywords: Schizolobium amazonicum, seedling production, mineral nutrition, fertilizing. DOI: http://dx.doi.org/10.14583/2318-7670.v04n02a11
INCOME AND COSTS OF FOREST CUTTING IN WOOD LOGGING IN A FORESTRY MANAGEMENT AREA
Authors: Pereira Reginaldo Sérgio , Vale Ailton Teixeira do , Miguel Eder Pereira , Emmert Fabiano , Mota Fabricia Conceição Menez , Rezende Alba Valéria 
Published: August 2024

RENDIMENTO E CUSTOS DO CORTE FLORESTAL NA EXPLORAÇÃO MADEIREIRA EM ÁREA DE MANEJO FLORESTALAvaliou-se a produtividade e os custos da exploração de madeira na floresta Amazônica, durante a realização das operações do corte florestal com a motosserra. O estudo foi conduzido em área de manejo florestal, floresta de terra firme, localizada no sul do Estado do Pará. Para a determinação do rendimento foram obtidos os volumes individuais das árvores exploradas e os tempos dos respectivos elementos do ciclo operacional do corte florestal. O custo de produção foi calculado pela razão entre os custos operacionais, fixos e variáveis, pelas horas efetivas trabalhadas. Foi realizada uma análise de correlação para a verificação da influência de propriedades físicas e mecânicas da madeira no tempo de derrubada das árvores. O ciclo operacional do corte florestal durou em média 31,5 min por árvore processada. As operações preliminares consumiram o maior tempo com 45,4% do tempo total, sendo o tempo médio por árvore de 14,3 min. A eficiência operacional do corte foi de 75% e a produtividade média de 20,15 m2 he-1, com custo por hora efetiva trabalhada de US$ 19,36. O custo de produção foi de US$ 1,18 m-3. As propriedades tecnológicas da madeira não explicaram estatisticamente as diferenças encontradas nos tempos de derrubada das árvores.Palavras-chave: floresta tropical, Amazônia, motosserra. ABSTRACTThe productivity and costs of logging in the Amazon rainforest were evaluated during the performance of the cutting forest operations with the chainsaw. The study was conducted in the forest management, upland forest, located in the south of Pará state, Brazil. To determine the income, individual volumes of the exploited trees were obtained and the time of each element of the operational cycle of the forest cutting. The production cost was calculated between the operational costs, fixed and variables by the worked hours. A correlation analysis was performed to verify the influence of physical and mechanical wood properties during the falling of trees. The forest cutting operational cycle lasted an average of 31.5 min per processed tree. Preliminary operations consumed the most time with 45.4% of the total time, with an average time of 14.3 min per tree. The operational efficiency of the cutting was 75% and the average productivity of 20.15 m3 he-1, with a cost of per effectively worked hour of US$ 19.36. The production cost was US$ 1.18 m-3. The technological properties of the wood did not explain statistically the differences found at the time of falling.Keywords: rainforest, Amazon, chainsaw DOI: http://dx.doi.org/10.14583/2318-7670.v04n03a05
CARACTERÍSTICAS MECÂNICAS DE TIJOLOS ECOLÓGICOS COM INCORPORAÇÃO DE RESÍDUO
Authors: Siqueira Élito , Amaral Adriana Garcia do , Schneider Roselene Maria , Atoatti Caroline 
Published: August 2024

O objetivo desse estudo foi avaliar as características mecânicas em tijolos fabricados a partir da mistura de solo, cimento e resíduo. O experimento foi realizado em Sinop-MT, o solo utilizado foi um Latossolo VermelhoAmarelo-Distrófico. O cimento utilizado foi o Cimento Portland (CP II Z-32) e o resíduo era proveniente de tornearia mecânica. Os tijolos de solo-cimento-resíduo foram fabricados com três teores de resíduo, 5, 10 e 15% e uma testemunha, sem adição de resíduo, foram moldados em prensa manual e mantidos em cura úmida durante 7 dias. Os ensaios de resistência à compressão simples e absorção de água foram realizados de acordo com a NBR 8.492 (2012). Em média os valores de resistência obtidos variaram de 0,33 à 0,45 Mpa. Os tijolos testados apresentaram capacidade de absorção variando entre 7 e 13%, ficando dentro do limite estabelecido pela pela NBR 8.491 (ABNT, 2012). Os tijolos fabricados a partir da mistura solo-cimento-resíduo não atingiram a resistência mínima exigida por norma, o mesmo foi observado nos tijolos sem adição de resíduo, independente da idade de ensaio.Palavras-chave: solo-cimento, sustentável, resistência, absorção. MECHANICAL CHARACTERISTICS OF ECOLOGICAL BRICKS WITH RESIDUE INCORPORATION ABSTRACTThe objective of this study was to evaluate the mechanical properties of bricks made from the soil mix, cement and residue. The experiment was realized in Sinop, MT, Brazil, the soil was a Red-Yellow-Dystrophic Latosol. The cement used was Portland cement (PC II-32 Z) and the residue was from mechanical turning. The soilcement-residue bricks were made with three concentrations of residue, 5, 10 and 15% and a witness without addition of residue were molded in a manual press and kept moist curing for 7 days. Resistance assays for compressive and water absorption were realized according to NBR 8492 (2012). On average resistance values obtained were 0.33 to 0.45 MPa. Tested residue levels have absorptive capacity varying between 7 and 13%, which was within the limit set by the NBR 8491 (ABNT, 2012). The bricks made from soil-cement-residue mixture did not meet the minimum resistance required as a rule, the same was observed in bricks without adding residue, regardless of age test.Keywords: soil-cement, sustainable, resistance, absorbency. DOI: http://dx.doi.org/10.14583/2318-7670.v04n03a10