bluuebunny/crossref_metadata_2025 huggingface dataset:
Ibuprofen Loaded Electrospun Polymeric Nanofibers: A Strategy to Improve Oral Absorption
Authors: Panda Dibya Sundar , Alruwaili Nabil K. , Swain Kalpana , Pattnaik Satyanarayan
Published: September 2022

The poor aqueous solubility of candidate drugs has presented a great challenge to formulation scientists for their effective oral delivery. Poor solubility is often associated with poor dissolution behavior and, subsequently, poor bioavailability for those drugs when intestinal absorption is dissolution rate limited. In the present study electrospun polymeric nanofibers were developed to address the poor aqueous solubility of ibuprofen, a Biopharmaceutic Classification System (BCS) class-II drug. Hydrophilic spinnable polymers like polyvinyl pyrrolidone were deployed as a carrier system for the fabrication of nanofibers. The electrospinning parameters like flow rate, voltage, and spinneret to collector distance were optimized. The fabricated ibuprofen-loaded nanofibers were characterized using scanning electron microscopy and differential scanning calorimetry. Drug release studies and ex vivo intestinal absorption studies were also carried out. The nanofiber-based platform significantly improved in vitro absorption of ibuprofen compared to pure ibuprofen crystals.
Combined Pharmacophore Modeling, 3D-QSAR, Molecular Docking and Molecular Dynamics Study on Indolyl-aryl-sulfone Derivatives as New HIV1 Inhibitors
Authors: Ouassaf Mebarka , Qais Faizan Abul , Belaidi Salah , Bakhouch Mohamed , Mohamed Ahmed Said , Chtita Samir
Published: September 2022

The present study deals with the in silico of 45 indolyl-aryl-sulfones known as anti-HIV1. The data were collected from recent previously reported inhibitors and divided into a sub-set of 33 compounds as the training set and the remaining 12 compounds were kept in the test set. The selected pharmacophore–ADRRR–yielded a statistically significant 3D-QSAR model containing high confidence scores (R2 = 0.930, Q2 = 0.848, and RMSE = 0.460). The predictive power of the established pharmacophore model was validated with an external test (r2 = 0.848). A systematic virtual screening workflow shows an enrichment factor and has revealed a high predictive power. Then the model was used to screen the filtered PubChem database mapping all chemical features of model pharmacophore. The recognized hits were further assessed by in silico ADMET studies. Molecular dynamics also used to explore the stability of obtained complexes. Finally, these selected compounds are probably to become a good lead molecule for the development of effective anti-HIV-1 drugs.
Smart-seq3xpress v2
Authors: Hagemann-Jensen Michael
Published: September 2022

Plate-based single-cell RNA-sequencing methods with full-transcript coverage typically excel at sensitivity but are more resource and time-consuming. Here, we miniaturized and streamlined the Smart-seq3 protocol for drastically reduced cost and increased throughput.
CO2 capture and water use efficiency in Opuntia stricta (Haw.) at different seasons and evaluation times
Authors: Souza José Thyago Aires , Araújo Jucilene Silva , Félix Evaldo dos Santos , Alves Rita de Cássia , Oliveira Filho Tarcísio José de , Lira Elder Cunha de
Published: September 2022

The forage cactus Mexican Elephant Ear is widely incorporated into the animal productive chain of the northeast region of Brazil. However, there is a lack of studies on the physiological dynamics of this cactus. Therefore, this study was conducted at the Estação Experimental Prof. Ignácio Salcedo of the Instituto Nacional do Semiárido (INSA), in Campina Grande, State of Paraíba, Brazil. The aim of this study was to evaluate CO2 uptake and water-use efficiency levels in Opuntia stricta (Haw.) during different seasons and evaluation times. The treatments were distributed using a 24×2 factorial arrangement, which corresponded to the evaluation of gas exchange processes for 24 hours in the rainy (June) and dry (December) seasons. The evaluated parameters were stomatal conductance, transpiration and CO2 uptake rate, internal CO2 concentration, instantaneous water-use efficiency and intrinsic water-use efficiency. The results revealed that gas exchange in the forage cactus was more intense during the rainy season, with good stability, than the low exchange levels during the dry season. Regardless of the season, the CO2 uptake peaked between 24:00 and 02:00. In addition, this range of time is the most suitable to conduct analyses under field conditions.
In vitro effect of cocoa leachates on growth and development of Moniliophthora roreri ([Cif.] H.C. Evans et al.) isolated from Theobroma cacao (L.)
Authors: Gómez-Gutierrez Sandra Victoria , Beltrán-Acosta Camilo Rubén , Gómez-Caro Sandra
Published: September 2022

The cocoa crop is part of the peasant’s economic activity and agroforestry systems in many regions of Colombia and the world. Its yields are diminished by phytosanitary problems, being the frosty pod rot caused by the fungus Moniliophthora roreri, the most limiting disease with decreases in production of over 90%. In this study, samples of cocoa leachates from commercial producing farms were characterized and the antifungal activity of sterilized, non-sterilized, and filtered cocoa leachates against M. roreri was evaluated under in vitro conditions, at concentrations of 1, 2, 5, 10, and 15%. Monosporic isolates of the pathogen were obtained from diseased fruits collected from cocoa-producing farms in the municipality of Yacopi in Cundinamarca, Colombia. The effect of leachates on M. roreri conidial germination, mycelial growth, and inoculum production was evaluated. It was found that non-sterilized cocoa leachates at all concentrations caused 100% reduction on the three variables evaluated, while sterilized leachates generated the same effect at concentrations of 10 and 15%. Filtered leachates showed no inhibitory effect on the radial growth of the pathogen, but they caused a reduction of conidial germination of 89.9, 90.5 and 95.9% at concentrations of 5, 10, and 15%. The presence of malic, citric, and ascorbic acids, compounds such as NH4, PO4, and NO3, and elements such as Ca, K, Na, Mg, and Cl in the evaluated leachates was identified using high-efficiency liquid chromatography and physicochemical analysis. This research showed the potential of cocoa leachates, even at low concentrations, for the control of M. roreri, which can be attributed to the action of specific compounds such as those found in chromatographic tests.
Physiological and sanitary quality of black bean seeds dependent on storage time and initial seed moisture content
Authors: Menegaes Janine Farias , Nunes Ubirajara Russi , Fiorin Tatiana Tasquetto , Swarowsky Alexandre , Munareto Janete Denardi
Published: September 2022

Black beans (Phaseolus vulgaris L.) are a species of great importance for family farming, both for food security and socioeconomic activity. The objective of this work was to assess the physiological and sanitary viability of black bean seeds stored with different initial moisture contents and cold storage periods. It was used a completely randomized design, 3×5 (seed moisture levels: 10, 13 and 16%, and storage periods: 0, 3, 6, 9 and 12 months in cold rooms, with four repetitions). Black bean seeds belonging to variety IPR88 Uirapuru were grown in the municipality of Santa Maria, Brazil, harvested in March 2020, and stored in a cold room (15ºC and 40% RH) in Kraft paper bags (brown type, 1.0 kg). Physiological variables and sanitary quality were assessed through laboratory tests. According to the results, it was possible to verify that the physiological and sanitary quality of black beans were negatively affected with the increase of storage period, in all grades. However, it is possible to store these seeds with moisture contents of 10 or 13% for a period of up to nine months in a cold room, with a 70% germination quality.
Buscando una resistencia duradera a la enfermedad del nudo negro en frijol común: desarrollo de poblaciones interespecíficas
Authors: Ligarreto-Moreno Gustavo Adolfo , Garzón-Gutiérrez Luz Nayibe , Pimentel-Ladino Christian Camilo
Published: September 2022

No se conocen materiales de fríjol común que sean resistentes a la enfermedad del nudo negro (Boeremia noackiana [Allesch.] Aveskamp, Gruyter & Verkley). Sin embargo, algunos estudios han reportado genotipos de fríjol común que exhiben una reacción intermedia a la enfermedad, pero estos materiales carecen de estabilidad para esta característica. El acervo genético secundario del fríjol (Phaseolus polyanthus Grenm.) ha sido evaluado desde 1995 en búsqueda de dicha resistencia. Esta población muestra una respuesta variada a la enfermedad, pero carece de las características comerciales del grano. El estudio se realizó durante 2017-2018 en Bogotá bajo condiciones de invernadero, a través de cruces interespecíficos de variedades comerciales de fríjol (Phaseolus vulgaris L.) en Colombia con genotipos resistentes de la población nudo negro de P. polyanthus de origen CIAT. Para realizar los cruces se siguió la técnica de hibridación con emasculación, tanto en cruces directos como recíprocos. La baja eficiencia en la viabilidad de cruces interespecíficos debido a aparentes problemas de compatibilidad genética citoplasmática ha sido reportada en diferentes investigaciones. Sin embargo, en este estudio la eficiencia del porcentaje de cruces interespecíficos viables aumentó significativamente en las poblaciones F1 y retrocruzamientos, llegando a 67%. Con las semillas obtenidas se conformaron poblaciones interespecíficas de Bacatá × ASC 160 y Bacatá × ASC 162, que constituyen el punto de partida de un programa de mejoramiento para resistencia a la enfermedad de nudo negro en fríjol común a partir de cultivares comerciales susceptibles.
Sintonización basada en datos de un control difuso mediante técnicas de optimización evolutiva en turbinas eólicas flotantes
Authors: Hernández-Hernández César , Sierra-García Jesús , Santos Matilde
Published: September 2022

En este trabajo se presenta un método de sintonía de un control PI de pitch y un control difuso de pitch para turbinas eólicas flotantes con la finalidad de maximizar la producción de energía y reducir las vibraciones. Debido a la complejidad del sistema, se han aplicado diversas técnicas de control para encontrar soluciones eficientes con el fin de mejorar la productividad de estos dispositivos de energía renovable. El control PI es sintonizado por generación aleatoria de las ganancias KP y KI a través de múltiples simulaciones, y se presenta también un ajuste basado en datos de un control difuso utilizando dos algoritmos de optimización: enjambre de partículas y búsqueda de patrones. Los controladores propuestos se ha aplicado al aerogenerador flotante tipo barcaza de 5 MW de NREL. Ambos controladores se han comparado con el controlador integrado en FAST, un controlador PI de ganancia programada (GS-PI), dando mejores resultados en términos de error de potencia nominal y menor desplazamiento de la torre y de las oscilaciones de la plataforma.
Organizational Commitment as a Mediator of Organizational Support and Emotional Intelligence in Shaping Organizational Citizenship Behavior
Authors: Junita Audia , Hafas Hafriz Rifki , Nasution Muhammad Alwi Syahputra
Published: September 2022

Research aims: This study aims to analyze the effect of organizational support and emotional intelligence on organizational citizenship behavior (OCB) through employee organizational commitment.Design/Methodology/Approach: This research was conducted in the Central Bureau of Statistics in Medan City with a population of 100 permanent partner employees. Using non-probability sampling, the entire population became the research sample. Meanwhile, the analysis technique employed path analysis.Research findings: The results proved that organizational support and emotional intelligence had a significant effect directly on organizational citizenship behavior (OCB) and indirectly through employees' organizational commitment. In other words, increased organizational support and emotional intelligence of employees will intensify the level of employee organizational commitment, raising the level of organizational citizenship behavior (OCB) and vice versa. In this case, organizational support strongly predicts employees’ high organizational commitment. Theoretical contribution/Originality: Further research that explores other predictors needs to be carried out with more significant respondents to generalize the findings better.Practitioner/Policy implication: It is essential to provide more intensive organizational support to employees since this variable is a strong organizational predictor of generating a superior level of employee organizational commitment. Organizations also need to conduct in-depth personality tests to detect the level of individual emotional intelligence of employees who work in the field and interact with the community for better work effectiveness.Research limitation/Implication: The limited number of population and samples in the agency is a limitation of the study to generalize the findings better.
Migración y educación: desafíos y oportunidades
Authors: Elías Alison , Granada Isabel , Näslund-Hadley Emma , Ortiz Paola , Romero María Jimena , Dávalos Adela
Published: September 2022

En las últimas décadas, muchos países de la región vienen experimentando movimientos masivos de personas que huyen de la pobreza extrema, de situaciones de violencia o de dificultades socioeconómicas, políticas y medioambientales. Familias enteras viajan grandes distancias en busca de seguridad, bienestar y mejores oportunidades. En América Latina y el Caribe (ALC), los flujos migratorios incluyen niños, niñas y adolescentes que, entre otras cosas, requieren acceso a servicios educativos. Pocos servicios son más importantes que la educación, y en la mayoría de los países de ALC existen leyes o estatutos que proporcionan este derecho universal sin discriminación, independientemente del estatus migratorio. Sin embargo, las familias migrantes se enfrentan a varios obstáculos que dificultan el acceso educativo y la inclusión. La región está avanzando en su respuesta a estos desafíos. Los países receptores han implementado diferentes programas e intervenciones de cara al aumento de flujos migratorios que enfrentaron en los últimos cinco años. Esta publicación se enfoca en presentar los desafíos y oportunidades de esta compleja temática.
Simulation of Plasma Assisted Supersonic Combustion over a Flat Wall
Authors: Gutierrez Albio D. , Alvarez Luis F.
Published: September 2022

This work presents a simplified methodology to couple the physics of a nanosecond pulsed discharge to the process of supersonic combustion in a flat wall combustor configuration. Plasma and supersonic combustion are separately simulated and then coupled by seeding plasma-generated radicals on the combustion domain. The plasma model is built assuming spatial uniformity and considering only the kinetic effects of the nanosecond pulsed discharge. Therefore, a zero-dimensional kinetic scheme accounting for the generation of plasma species is utilized. For the combustion model, the complete set of Favre-averaged compressible Navier Stokes equations along with finite rate chemistry is solved through a control-volume based technique via the commercial software Ansys Fluent. The computational results are compared against experimental studies showing that the proposed methodology can capture the main kinetic effects of the nanosecond pulsed discharge on supersonic combustion. OH concentration contours reveal the presence of an enhanced flame when the plasma is applied following the trends from experimental OH PLIF images. In addition, time evolving temperature and OH concentration contours show that the ignition delay time is reduced with the application of the discharge.
Numerical Study of an Improved Non-Circular MC Fuelled with H/Air for Thermo-Photovoltaic (TPV) Applications
Authors: Ayad Kakei A. , Khdher Abdolbaqi Mohammed , Albazzaz Kamal Jalal Tawfeeq , Kakahy Amer Najat Najmaldeen , Abdulkarim Ali Hussein , Epaarachchi Jayantha
Published: September 2022

In recent years, researchers have paid special attention to wall uniformity temperature and improvement in a micro-combustor (MC) for applications as thermos-photovoltaic (TPV) since they have a direct influence on feasibility and efficiency of the required conversion of energy. Numerous experimentation and numerical studies in the field of micro-combustion have been carried out and published in this respect. This study focuses on the flame and flow behaviour in an improved MC. Utilizing the famous approach of fluid dynamics being computational (CFD), the impact of geometrical flow parameters behaviour and temperature of wall is explored and measured. The generated model is being used to evaluate the effects of Hydrogen (H) mass flow rate (MFR) and H/air equivalency ratios on the flame pattern and outer temperature of wall of conventional and enhanced MCs. Moreover, the influence of various MC cross sections (CS), such as square, circular, and flat, on temperature of wall is examined. The findings reveal that when the MFR rises, the wall outside temperature rises as well. The MC with flat cross-sections (CSs) is found to be more effective in terms of power of emitter and efficiency of emitter.
Features of Constructing a Solution Heterogeneous Equation and Clausen-Type Systems
Authors: Ubayeva Zhanar , Tasmambetov Zhaxylyk , Rajabov Nusrat
Published: September 2022

The possibilities of constructing a solution to an inhomogeneous the third-order equation have been studied, in particular the Clausen equation in the vicinity of special points x=0 and x=∞. The construction of the method for indeterminate coefficients to the construction of partial solutions of the Clausen equation is shown. These ideas are extended to constructing private solutions of the simple Clausen system near a regular feature with solutions in the form of a product of two hypergeometric Clausen functions, each of which depends on one variable. A number of properties of the product of Clausen functions constructed near these features have been proved. The construction of a common solution of the main heterogeneous system of Clausen is investigated. Four new functions have been created, representing the private solutions of the heterogeneous equation and systems like Clausen.
Performance Evaluation of IPTV Zapping Time Reduction Using Edge Processing of Fog RAN
Authors: Kareem Azad R. , Mahmood Ali M. , Al-Falahy Naser
Published: September 2022

Internet Protocol Television (IPTV) is a promising technology that can provide TV broadcast services everywhere and anytime in next-generation wireless networks. However, channel zapping delay time between two successive channel switches is one of the key metrics that may hinder viewers' satisfaction with the IPTV system. Several factors are contributed to prolonging the switching delay such as the delay of the access link that could be generated by the underlying network. In this paper, the minimization of the zapping delay is investigated using the concept of Fog Radio Access Networks (F-RAN) architecture. F-RAN will bring the access points closer to end users (cloud edge). This merit can be utilized an advantageous aspect for minimizing the zapping time of IPTV system due to the low latency communication over F-RAN architecture. To testify the improvement in the IPTV system, an experimental investigation method is applied based on various simulation scenarios. This would be achieved via identifying the problem of the zapping time from the correlated literature, followed by examining the associated causes for this delay. Furthermore, the F-RAN architecture has been proposed as a solution to the part of Zapping Time (ZT) latency that originates from the communication architecture. Additionally, the simulation design is developed based on assessment of two types of cellular architectures, which are the full centralized processing C-RAN and the distributed edge processing F-RAN architecture. The performance evaluation is measured based on the comparison of zapping delay time in both of the F-RAN architecture with the corresponding full centralized C-RAN architecture. Simulation results demonstrate a noticeable reduction in the zapping time with the F-RAN compared to the virtualized C-RAN architecture. Hence, the zapping delay time can be optimized with the application of F-RAN architecture.
Dynamic Modelling of Docking Autonomous PODs in Tandem Configuration
Authors: Al-Habahbeh Osama M. , Al-Adwan Romil S.
Published: September 2022

An adaptable transportation concept is proposed; comprising a fleet of autonomous PODs that can merge and separate based on passengers’ demand. The purpose is to match the number of seats with the number of passengers, thereby reducing vehicle size and energy consumption. It enables passengers’ in-person communication and simultaneous arrival. Since each POD has its own motor, if full power is not needed, one of the motors can be turned-off to save energy. The merging process is investigated so as to find the safe docking speeds when two PODs merge in tandem configuration. If the docking is not done at the right speed, it may cause damage to the vehicle, or else be inefficiently slow. The PODs are represented by finite element models, which are simulated to determine the safe merging speeds. The speeds are determined for different docking scenarios and POD materials; ranging from 1.4-16 km/h. The safe speeds depend on the type of material and adopted damage criterion; Nonmetallic materials showed higher tolerance than metallic materials in response to docking impact. As a recommendation for future work, other materials and configurations can be investigated, and the effect of the proposed system on traffic conditions can be evaluated.
Evaluation of Al-Ishaqi Irrigation Project: A Case Study Eastern Canal of the Project
Authors: Hameed Abdul Hameed Sadeq , Al Thamiry Hayder A.
Published: September 2022

An evaluation the performance of the irrigation system for the Al-Ishaqi irrigation project for the Eastern Canal was conducted to identify management strategies that can be used to improve the operation and performance of the irrigation system. The study area is located in Salah al-Din G.0overnorate, Iraq. The field work included determining the moisture content of the soil before and after irrigation, measuring the inflow of the field to find the depth of the applied water, field monitoring, and measuring the depth of the root zone for each irrigation process. Field measurements showed that the average efficiency of water application for the two fields (A, and B) are 59.81% and 38.6%, respectively. The results of the efficiency of water application showed that farmers use water more than the actual demand, so it was possible to increase the efficiency of field water use by controlling the quantities of water that supplied and controlling the irrigation time and water distribution within the irrigated land. The results also showed that the storage efficiency of the two fields (A, and B) ranged between (39.1% to 68.28%), and (41.80% to 79.8%), respectively. As for the efficiency of water distribution, the average distribution efficiency for fields (A) and (B) was about (99.54%) and (99.33%), respectively. The irrigation efficiency evaluation done in the Al-Ishaqi Irrigation Project revealed that farmers utilize more water than is required, resulting in a substantial amount of water being lost in the fields observed in this research owing to inefficient use. If the current scenario continues, groundwater levels would undoubtedly rise, putting the irrigation system's long-term viability in jeopardy.
Experimental Analysis of Training Parameters Combination of ANN Backpropagation for Climate Classification
Authors: Syaharuddin  , Fatmawati  , Suprajitno Herry
Published: September 2022

Artificial Neural Networks are widely used in prediction activities and classification processes. However, the implementation on average only uses a network architecture with one hidden layer, while the development of architectures with two or three hidden layers has not been done much. This article discusses the process of developing ANN Backpropagation using a Matlab-based graphical user interface with three hidden layers combined with non-linear activation functions (logsig, tansig, tanh) and training functions (trainrp and trainlm) based on learning rate and momentum. Architecture was created to study climate change in the area around Lombok International Airport station by training on hydrological data (rainfall) from January 2012 to December 2021 with a data type of 10-day interval (36 data every year). The number of neurons in the first hidden layer was determined using the Hecht-Nielsen model, while the second and third hidden layers used the Lawrence-Fredrickson model. Simulation results with architecture 36-73-37-19-1, a learning rate of 0.1, and momentum of 0.9 showed that variations in the activation function logsig-logsig-logsig-purelin and trainlm function demonstrated the best result with epoch of 7, MSE of 0.00090, and RMSE of 0.03011 in the training process and epoch of 5, MSE of 0.003758, and RMSE of 0.0613 in the data testing process. Furthermore, the prediction results demonstrated that a Q-value of 0.222 based on the Schmidt-Ferguson criteria obtained higher rainfall intensity information than previous years with climate category B (wet). Therefore, the government must be careful in determining policies related to field activities especially in agriculture because of climatic conditions with high rainfall.
The Design of Reynolds Number Apparatus with Demonstration
Authors: Jasim Nuralhuda Aladdin , Muhammed Manal Abdulsatter
Published: September 2022

The Reynolds number apparatus has been designed. The idea of this device enters all the details of life, all trains, wing of aircraft and ships, and each of them has a specific characteristic. Besides, the Reynolds number apparatus is designed to study the characteristics of fluid such as the velocity of the fluid, discharge, friction factor and the roughness coefficient. (Reynolds number) device was manufactured and fully took all information and details on how to use the device through the lessons given and reliable sources. The results from the device were taken such as the time and the amount of volume in liters. Some types of flow remained in their condition and others changed from transitional flow to turbulent flow. Based on the results, the relation between Reynolds numbers and friction factor are analyzed and the correlation between the time and the discharge are calculated too to investigate the analysis through this apparatus. The results proved all three types of flow and the relationship between Reynolds and friction factor is considered to be in linear regression. The relationship between discharge and flow velocity and Reynolds number is a 'direct' relationship. The increasing in the friction factor has displayed with decreasing in the value of Re. The R2 fit the model with value near to 0.90 or less. Also, the linear model is fit the relation between discharge and time, the increasing in the flowrate showed with decreasing the time. In some cases, the nonlinear fit the model with R2 near to 70 or less.
Analysis of Solution for the Stochastic Model Representing Water Scarcity in the Society
Authors: Siva Karunakaran , Athithan Singaram
Published: September 2022

The main aim of this paper is to study the stochastic effect of water scarcity in the society through our model. It has been shown that there is a unique global positive solution to the proposed stochastic epidemic model with boundedness and permanence. We have selected some effective Lyapunov functions to provide sufficient conditions for investigating water scarcity persistence and extinction. The theoretical results of this work have been verified based on numerical experiments.
Development and Definition of Biquadratic Transformations Using Spheres and Two-Way Hyperboloids
Authors: Baidabekov Auyez K. , Kemelbekova Elmira A. , Kussebayev Ualikhan K. , Sadykova Zhanna M. , Tuleuova Gulmarzhan K.
Published: September 2022

The insufficient use of quadratic transformations in applied geometry is explained by the fact that the methods of quadratic transformations are not developed much, although dozens of works by leading experts in applied geometry are devoted to the study of this problem, the development of graphic models, and their application in applied geometry. The research is devoted to the development of the theory of definition of biquadratic transformations of the plane. The essence of the proposed method for modeling biquadratic transformations of the plane, generated by a binary mapping of two surfaces of the second order, facilitation and solution of complex problems of applied geometries. And also, by means of graphical models of biquadratic transformations of the plane to facilitate the construction of curves of the second and fourfold orders. Considering a combination of non-linear surfaces of the second order, obtain subgroups of biquadratic transformations of the plane. The developed algorithm will make it possible to determine mathematical models of canonical biquadratic transformations of the plane, which is necessary for their practical application.
Effects of Hydrogen and Nitrogen Concentration on Laminar Burning Velocities and NO, CO Formation of Propane-Air Mixtures
Authors: Alturaihi Muna Hameed , Mashkour Mahmoud Atallah , AL-Musawi Sanaa Turki Mousa
Published: September 2022

With the development of the uses of hydrocarbon compounds in many industrial fields, especially in the field of energy liberation through oxidation of gases, as previous research specialized in improving the combustion processes of gases by adding particles of other gases that contribute to improving the combustion of these compounds in terms of temperatures and speed of flame combustion. The previous study aimed to improve the flame speed by adding different gases to several compounds. In this research paper, propane gas C3H8 is used as the main gas to improve its combustion properties. N2 and H2 gas were added in different proportions, through which a clear effect on the combustion properties can be seen in terms of combustion speed. Flames and exhaust as CO and NOx. As the auxiliary gases were added in this improvement at rates of 20%, 30% and 40%, and then these tests were analyzed, where it was concluded that H2 gas clearly contributed to improving the combustion speed of the flame, as the flame combustion velocity reached 58.3 cm/s by 40%.
Reducing Pratylenchus Population in Coffee Seedling with Mycorrhizal Fungi and Mycorrhiza Helper Bacteria
Authors: Hindersah Reginawanti , Asyiah Iis Nur , Harni Rita , Rahayu Dwi Suci , Fitriatin Betty Natalie
Published: September 2022

The attack of Pratylenchus coffeae nematode on coffee seedlings can limit coffee growth. The use of beneficial microbes as biofertilizer and bioprotectant is suggested to reduce the nematode attack on coffee seedlings and improve growth. A greenhouse experiment was conducted to observe the effect of arbuscular mycorrhizal fungi (AMF) Glomus spp. and mycorrhiza helper bacteria (MHB) P. diminuta and B. subtilis on coffee seedling growth and P. coffeae populations in the soil and roots. The experiment was set up in a randomized block design with five treatments and three replications. The coffee seedlings were grown in potting soil and inoculated with Glomus spp. combined with 20 g or 30 g of MHB solid inoculant. Seedlings were grown in the greenhouse for 10 weeks. The experiment verified that AMF inoculation combined with MHB did not affect the plant height, leaf number, or plant dry weight but decreased the P. coffeae population in the soil and roots of the seedlings. Inoculation of 20 g of MHB solid inoculant with AMF was more effective in reducing nematode population in soil and roots than 30 g of MHB. This experiment verified that Glomus spp., as well as P. diminuta and B. subtilis enable the control of P. coffeae in coffee seedlings.
Penilaian Kriteria Green Building Gedung Auditorium Universitas Jember Tahap Design Recognition Menggunakan Standar Penilaian Greenship Versi 1.2
Authors: Syaifuddin Mohammad , Suyoso Hernu , Ratnaningsih Anik
Published: September 2022

Saat ini perkembangan konstruksi bangunan banyak mengarah ke bangunan green building. Green Building Council Indonesia (GBCI) telah menyelenggarakan kegiatan sertifikasi bangunan berdasarkan peringkat penilaian Greenship. Melalui Islamic Development Bank (IsDB) Universitas Jember melaksanakan pembangunan gedung Auditorium. Bangunan ini perlu adanya penerapan penilaian kriteria green building pada perencanaan gedung Auditorium agar dapat mengetahui rating/sertifikasi sebagai tolok ukur sudah sejauh mana tingkat penerapan kriteria green building. Metode yang digunakan pada penelitian adalah metode wawancara, observatif/pengamatan, dan studi dokumen. Penelitian dilakukan berdasarkan perangkat penilaian Greenship  versi 1.2 tahap  Desain Recognition (DR). Hasil  penilaian kriteria green building gedung Auditorium Universitas Jember dari masing-masing kategori Greenship versi 1.2 diantaranya Tepat Guna Lahan memperoleh nilai 10 (sepuluh)  poin, Efisiensi dan Konservasi Energi memperoleh nilai 7 (tujuh) poin, Konservasi Air memperoleh nilai 3 (tiga) poin, Sumber dan Siklus Material memperoleh nilai 2 (dua) poin, Kesehatan dan Kenyamanan Dalam Ruang memperoleh nilai 3 (tiga) poin, dan Manajemen Lingkungan Bangunan memperoleh nilai 3 (tiga) poin. Berdasarkan total akhir penilaian didapatkan poin sebesar 28 (dua puluh delapan) poin dengan presentase 36,36% dan berada pada predikat Perunggu (Bronze) berdasarkan Perangkat Penilaian Greenship untuk Bangunan Baru versi 1.2.

kata kunci : green building, GBCI, Desain Recognition, dan Perunggu
Kajian Pengembangan Pelabuhan Pangkal Balam Berdasarkan Demand Pull dan Supply Push
Authors: Buchari Erika , Agustien Melawati , Kadarsah Edi , Fitriani Henny , Firdaus Ormuz , Jonris Wilmar
Published: September 2022

Pelabuhan Pangkal Balam terletak di kota Pangkalpinang, Provinsi Bangka Belitung. Kondisi pelabuhan Pangkal Balam saat ini tidak tertata dengan baik dimana penempatan barang muatan tidak sesuai dengan tempatnya. Ditambah lagi persoalan sedimentasi d isepanjang alur pelayaran masuk dan keluar pelabuhan, serta sistem buka tutup (bascule) jembatan emas yang sangat mempengaruhi pergerakan kapal. Pengembangan Pelabuhan Pangkal Balam ke arah Muara Sungai, di Pasir Padi sudah mencapai tahap DED, yang mana hambatan produktivitas Pelabuhan akibat adanya buka tutup Jembatan Bascule diharapkan akan teratasi. Permasalahanyang timbul adalah bagaimana potensi Pangkal Balam setelah Pelabuhan Barang di pindah ke Muara (ke pantai Pasir Padi), apa dan bagaimana kajian potensi tarikan kebutuhan (Demand Pull) di pelabuhan Pangkal Balam, bagaimana kajian tentang dorongan dan insentif untuk mengadakan fasilitas (supply push). Paper ini dimaksudkan untuk menganalisis potensi lain dari Pelabuhan Pangkal Balam setelah pelabuhan barang dipindah ke pelabuhan Pangkal Balam baru, menganalisis tarikan baru dari pelabuhan pangkal balam, dan manganalisis dorongan/insentif penyediaan fasilitas baru dari pelabuhan pangkal balam lama untuk menarik potensi demand baru. di pelabuhan pangkal balam pada masa yang akan datang. Hasil riset menunjukkan bahwa Pelabuhan Pangkal Balam dapat dikembangkan sebagai pelabuhan pariwisata dengan pengoperasian mini cruise. Tarikan baru yang dapat diciptakan untuk Pelabuhan Pangkal Balam, yaitu berupa potensi pariwisata dan wisata kuliner. Sedangkan penyediaan baru yang perlu dipersiapkan adalah port of call dengan mini cruise yang bekerjasama dengan cruise dan mega cruise internasional yang memiliki rute Singapura dan Malaysia.
Identifikasi Karakteristik Tanah Untuk Perencanaan Subgrade Pada Kecamatan Siliragung
Authors: Saputra Deni Dwi , Sandi Dora Melati Nurita , Erwanto Zulis
Published: September 2022

The subgrade is an important part of highway construction. The strength and durability of pavement construction depend on the nature and bearing capacity of the soil. The soil tested was the most dominant soil in the Siliragung sub-district, namely reddish-brown latosol soil and lithosol and gray grumusol soil. Soil characteristic tests were carried out by sieve analysis, Atterberg limit, specific gravity, bulk density, sand cone, standard proctor, and laboratory CBR without soaking. The values ​​obtained from the results of testing the characteristics of the soil at the location of the Siliragung sub-district have a percentage of grains that pass the sieve no. 200 <35% which is 10.01% and 20.24%, it is said that the soil which is included in the subgrade selection category is very good to good with a plasticity index of 4.7% and 11.55%, namely soils that have low to moderate plasticity with a CBR value of 14.71% and 8% are soils that are classified as medium to good subgrade criteria. Based on Turnbul (1968) and the Ministry of Public Works and Public Housing, Directorate General of Highways Road Pavement Manual Revised June 2017 Number 04/SE/Db/2017. For land having a CBR value of 6, the type of soil in Siliragung District does not need any improvement for road subgrade planning.

ABSTRAK

Tanah dasar (subgrade) merupakan suatu bagian terpenting pada suatu kontruksi jalan raya. Kekuatan dan keawetan suatu kontruksi perkerasan tergantung dari sifat dan daya dukung tanah. Tanah yang diuji adalah tanah yang paling dominan pada kecamatan Siliragung yaitu tanah jenis latosol cokelat kemerahan dan litosol dan grumosol kelabu. Pengujian karakteristik tanah dilakukan adalah analisa saringan, atterberg limit, berat jenis, berat isi, sandcone, standar proctor dan CBR laboratorium tanpa rendaman. Nilai-nilai yang didapat dari hasil pengujian karakteristik tanah pada lokasi kecamatan Siliragung, memiliki persentase butiran lolos ayakan no.200<35% yaitu sebesar 10,01% dan 20,24% dikatakan tanah yang termasuk kategori pemilihan tanah dasar baik sekali sampai baik dengan indeks plastisitas 4,7% dan 11,55% yaitu tanah yang memiliki plastisitas rendah sampai sedang dengan nilai CBR 14,71% dan 8% adalah tanah yang termasuk jenis kriteria tanah dasar sedang sampai baik. Berdasarkan Turnbul (1968) dan Kementrian Pekerjaan Umum Dan Perumahan Rakyat Direktorat Jendral Bina Marga Manual Perkerasan Jalan Revisi Juni 2017 Nomor 04/SE/Db/2017. Untuk tanah memilki nilai CBR ≥ 6 maka jenis tanah yang ada di Kecamatan Siliragung tidak perlu ada perbaikan untuk perencanaan subgrade jalan.
Analisis Risiko Cost Overrun (Pembengkakan Biaya) Pada Proyek Konstruksi: Kajian Literatur
Authors: Puteri Lianda Akti Leo , Dhiu Conshita Hubertha , Syharto M. Elbet , Purba Humiras Hadi
Published: September 2022

Cost is a fundamental component of any construction project. Observations show that cost overrun is a significant phenomenon in the construction industry worldwide. Therefore, it is essential to know the factors that cause cost swelling. This paper aims to identify the recent top significant factors causing the swelling of construction project construction costs in both developed and developing countries (in particular) according to many variables over the last three decades. Through a comprehensive literature review, the most common and most common causes of cost swelling worldwide and developing countries, in particular, are listed; the factors are: Estimation Errors, Addition of items/VO, Finance, Team Participation, and environment, respectively factors are prioritized according to their emergence, and it is concluded that cost overrun factors vary significantly across countries. The studies on cost overrun factors in construction projects provide a reference for other projects that may be executed under similar circumstances and provide valuable information for international companies intending to provide construction projects.

ABSTRAK

Biaya adalah komponen mendasar untuk setiap proyek konstruksi. Hasil pengamatan menunjukkan bahwa pembengkakan biaya (cost overrun) adalah fenomena utama dalam industri konstruksi di seluruh dunia. Oleh karena itu, penting untuk mengetahui faktor yang menyebabkan pembengkakan biaya. Tujuan penelitian ini adalah untuk mengidentifikasi faktor-faktor utama teratas terbaru penyebab pembengkakan biaya proyek konstruksi baik di negara maju dan berkembang (khususnya) menurut banyak variabel selama tiga dekade terakhir. Melalui tinjauan literatur yang komprehensif, yang paling umum dan  penyebab pembengkakan biaya yang sering terjadi di seluruh dunia dan negara-negara berkembang khususnya, faktor-faktornya adalah: Kesalahan Estimasi, Penambahan item/VO, Finance, Partisipasi Tim dan lingkungan, masing-masing faktor diprioritaskan menurut kemunculannya dan disimpulkan bahwa faktor penyebab cost overrun sangat bervariasi di seluruh negara. Studi tentang faktor penyebab pembengkakan biaya dalam proyek konstruksi akan memberikan referensi untuk proyek lain yang mungkin dieksekusi dalam keadaan serupa dan juga akan memberikan informasi berharga bagi perusahaan internasional yang bermaksud untuk menyediakan proyek konstruksi.
Analisa Nilai Efektivitas Ruang Henti Khusus (RHK) untuk Sepedah Motor Pada Simpang Bersinyal (Studi Kasus : Persimpangan Jalan Diponegoro – Jalan Panglima Sudirman – Jalan AKBP. M. Suroko – Jalan Teuku Umar Bojonegoro)
Authors: Rodhi Nova Nevila , Isro'iyah Luluk
Published: September 2022

This study aims to determine the performance of signalized intersections and determine the value of the occupancy rate, the level of violations, and the success rate of RHK two-wheeled vehicles at the signalized intersection of the research location. The average percentage of RHK's success rate on its capacity in the entire approach arm is 16.13%. Thus, it is stated that RHK is less effective to be implemented. The average percentage of RHK success rate is only filled by motorcycles in the entire approach arm of 80.51%. Based on the behavior of road users, RHK is effectively implemented. Based on the level of violations, the percentage of violations of 4.34% or less than 5%. It can be stated that RHK in each arm of the approach is effectively implemented.

ABSTRAK

Tujuan dari penelitian ini adalah untuk mengetahui kinerja simpang bersinyal serta nilai tingkat pemenuhan, tingkat pelanggaran serta tingkat keberhasilan RHK kendaraan roda dua pada simpang bersinyal lokasi penelitian. Prosentase rata-rata tingkat keberhasilan RHK terhadap kapasitasnya pada keseluruhan lengan pendekat sebesar 16,13% sehingga dinyatakan bahwa RHK kurang efektif diterapkan. Presentase rata-rata tingkat keberhasilan RHK hanya diisi oleh sepedah motor pada keseluruhan lengan pendekat sebesar 80,51% dapat dinyatakan bahwa RHK efektif diterapkan, jika ditinjau dari perilaku pengguna jalan. Tingkat keberhasilan RHK jika ditinjau dari tingkat pelanggarannya, memiliki presentase pelanggaran 4,34% atau kurang dari 5% sehingga dapat dinyatakan bahwa RHK pada masing-masing lengan pendekat efektif diterapkan.
Membran Keramik Berbahan Dasar Tanah Liat dan Fly Ash untuk Penyisihan Warna dan Zat Organik pada Air Gambut
Authors: Darmayanti Lita , Putri Mutia , HS Edward
Published: September 2022

Peat water is surface water or groundwater that is widely found in tidal areas, swampy and lowland, brownish red, and has a high organic content. The large amount makes peat water an alternative source of water for people who live on peatlands even though they have not met the standards of clean water quality. This study aims to treat peat water using the ceramic membrane filtration process of clay materials and coal fly ash for the removal of color and organic substances Research is conducted by varying the composition of the material and temperature of ceramic membrane combustion with the composition of TL:FA (60:40; 50:50; 40:60%) and combustion temperature (750; 800; 850 ºC), and calculating the rate of flow speed (flux). The best composition of materials and combustion temperatures are obtained at a composition of 50:50% and a temperature of 850 ºC with the efficient removal of color and organic substances are 98.70% and 94.35% respectively. In contrast, the highest flux values are obtained in ceramic membranes with a composition of 40:60% and combustion temperatures of 850 °C which is 0.96 L / m2.h.

ABSTRAK

Air gambut adalah air permukaan atau air tanah yang banyak terdapat di daerah pasang surut, berawa dan dataran rendah, berwarna merah kecoklatan, dan memiliki kandungan organik tinggi. Jumlahnya yang banyak membuat air gambut menjadi sumber air alternatif bagi masyarakat yang tinggal di lahan gambut meski belum memenuhi baku mutu air bersih. Penelitian ini bertujuan mengolah air gambut menggunakan proses filtrasi membran keramik dari bahan tanah liat dan fly ash batubara untuk menyisihkan warna dan zat organik Penelitian dilakukan dengan memvariasikan komposisi bahan dan temperatur pembakaran membran keramik terbaik dengan komposisi bahan TL:FA (60:40; 50:50; 40:60 %) dan temperatur pembakaran (750; 800; 850 oC), serta menghitung laju kecepatan alirannya (fluks). Komposisi bahan dan temperatur pembakaran terbaik didapatkan pada komposisi 50:50 % dan temperatur 850 oC dengan efisiensi penyisihan warna dan zat organik yang dihasilkan berurutan sebesar 98,70% dan 94,35%, sedangkan nilai fluks tertinggi diperoleh pada membran keramik dengan komposisi 40:60 % dan temperatur pembakaran 850 oC yaitu sebesar 0,96 L/m2.jam.
Perencanaan Pengendalian Banjir Kali Kedunglarangan Kabupaten Pasuruan
Authors: Permata Aprilia Gita , HANDAJANI Novie , Wahjudijanto Iwan
Published: September 2022

Bangil Subdistrict in Pasuruan Regency, East Java contains the Kedunglarangan River with a length of 39.69 km and the Kedunglarangan Watershed (DAS) covering an area of ​​324.01 km². The inability of the drainage channel which is unable to accommodate the upstream water flow causes flooding in the Kedunglarangan River. This happened due to heavy rains that inundated several areas, one of which was in Kalianyar Village. This study aims to determine the planning of flood control management in the area. The method used for flood management in this study will be carried out by analyzing the design flood discharge with a return period of 25 years and the channel capacity analysis using HEC_RAS. The analysis was used for planning the addition of the embankment height in each river segment to reduce flood discharge. The results in this study were obtained by adding the height of the embankment in segment 1 with a discharge (Q) of 254.404 m3/s, carried out by adding an addition to the height of the left embankment by 4 m and the right side of the embankment with a height of 3.5 m, Segment 2 with river water discharge 550,839 m3/s, the addition of the height of the embankment on the left and right sides is 6.5 m and 4 m, respectively and segment 3 with a river water discharge of 680,997 m3/s, is done by adding the height of the embankment on the left and right by 5m and 2.5m.

ABSTRAK

Kecamatan Bangil di Kabupaten Pasuruan, Jawa Timur terdapat Kali Kedunglarangan dengan panjang 39,69 km dan Daerah Aliran Sungai (DAS) Kedunglarangan seluas 324,01 km². Ketidak mampuan saluran drainase yang tidak mampu menampung aliran air hulu menyebabkan banjir di Kali Kedunglarangan. Hal tersebut terjadi dikarenakan hujan deras yang menggenangi beberapa wilayah salah satunya pada Desa Kalianyar. Pada penelitian ini bertujuan untuk mengetahui perencanaan penanganan pengendalian banjir di daerah tersebut. Adapun metode yang dilakukan untuk penanganan banjir pada penelitian ini akan dilakukan dengan analisis debit banjir rancangan dengan kala ulang 25 tahun dan analisis kapasitas saluran menggunakan HEC_RAS . Analisis dilakukan pada debit rancangan digunakan untuk perencanaan penambahan tinggi tanggul pada setiap segmen sungai untuk mengurangi debit banjir. Hasil pada penelitian ini diperoleh dengan penambahan tinggi tanggul pada segmen 1 dengan debit (Q) sebesar 254,404 m3/dt, dilakukan dengan memberikan penambahan pada tinggi tanggul sebelah kiri sebesar 4 m dan sisi tanggul sebelah kanan dengan tinggi 3,5 m, Segmen 2 dengan debit air sungai 550,839 m3/dt, penambahan tinggi tanggul sisi kiri dan kanan masing-masing 6,5 m dan 4 m, masing-masing dan segmen 3 dengan debit air sungai 680,997 m3/dt, dilakukan dengan penambahan tinggi tanggul pada sisi kiri dan kanan sebesar 5m dan 2,5m.