bluuebunny/crossref_metadata_2025 huggingface dataset:
ESTUDIO DE BRECHAS DE FORMACIÓN EN EL PROGRAMA DE INGENIERÍA INDUSTRIAL PARA LA REGIÓN DEL VALLE DEL CAUCA
Authors: Pineda Zapata Uriel Fernando
Published: September 2022

El presente trabajo tuvo lugar en la ciudad de Cali durante el año 2019. Tiene como propósito identificar los factores que afectan la formación profesional en ingeniería Industrial ofrecida en las Instituciones de Educación Superior de la región, y la naturaleza de las brechas existentes frente a las necesidades y expectativas del medio empresarial y social de la región del Valle del Cauca. Se establecen luces sobre las competencias de formación pertinentes para un programa como Ingeniería Industrial frente a las realidades cambiantes en la industria y en las organizaciones económicas. Para ello, se plantea una investigación aplicada de tipo exploratorio sustentado en la técnica IMBCH. El estudio inicia con un componente fuerte de revisión documental y culmina con la etapa donde se establece, a manera de propuesta, la tipología de brechas e indicadores de medición en el campo de la educación superior. Además, como fuentes de información primarias, se utiliza la técnica de consulta de expertos en el sector académico, a través de seis importantes universidades de la región y se aplica encuesta a 25 empresas reconocidas del sector productivo. Como resultado, se identifican brechas de calidad, de pertinencia y de competencias, cuyo cierre podrían contribuir a fortalecer el proceso enseñanza-aprendizaje del Valle del Cauca y de Colombia. Queda por establecer cuál es el enfoque de competencias de formación que predomina en los programas de Ingeniería Industrial en las universidades participantes de este trabajo, sus referentes teóricos y cómo procuran responder con sus modelos de formación a la actual situación social y laboral.
Quality of service (QoS) based wireless network for mobile Ad Hoc networks
Authors: Charles A.
Published: September 2022

Quality of Service (QoS) requirements are possible with actual transmission of updates for wireless applications typically included in mission critical applications such as military use or disaster recovery. This research paper proposes an efficient Secure Quality Oriented Distributed (S-QOD) Secure Enhanced Adaptive 3 Acknowledgment (S-EA3ACK) and implements a new on-demand wireless intrusion detection system. S-QOD can improve a best performance of output quality (QoS) to reduce transmission delay, transmission time and also increase network communication throughput for S-EA3ACK using Enhanced Adaptive Acknowledgement (EAACK) DSA (Digital Signature Algorithm) with MAJE4 symmetric cryptography specially designed for MANET through Network Simulator-2.34 (NS2) to implement it.
Room for Expansion
Authors:   , Izard Timothy
Published: September 2022

3D printed multi density bio foam seating has the potential to minimise the waste of materials, improve the level of load distribution, potentially resulting in greater levels of comfort, and reduce the use of traditional unsustainable petrochemical foams. Previous research shows that foam density can be altered with thermo-control during the 3D printing extrusion process. The evenly distributed blowing agent within the filament, creates gas bubbles of different sizes through a range of temperatures, thus creating a more aerated product changing the material density and softness.

This research study focuses on the thermo-control of 3D printing of soft foams and the design opportunities these offer through the development of a parametric design system tailored to allow variable density within a single print specifically customised to an individual’s seated pressure map. The research concentrates on the thermo-control of density rather than density being defined by the geometry of various lattice structures.

Through an iterative design and testing process, physical samples were 3D printed and evaluated. Digital control was further developed through a script in Grasshopper (a plugin for Rhinoceros 3D) which allowed the precise control of adjustable settings, such as, temperature, extrusion rate and print speed. Extensive evaluation of the aeration of the 3D print was conducted by way of cross-sections and appraising density values. With the final output of this research being a computational parametric modelling software system and a series of variable density foam 3D prints for furniture applications.
Jump in: The Swimmable Urban River - Te Awa Kairangi - The Hutt River
Authors:   , Milne Tessa
Published: September 2022

Rivers are the life force of the land, the veins of papatuanuku. To swim in clean rivers is a right of passage in New Zealand. Many have had a childhood filled with memories of picnicking and swimming with friends and family beside their local river.

The most memorable places for swimming, the ones that are most socially and experientially rich and intense, seem to be rural swimming spots that are beyond the urbanised engineered river cross- sections and require a car to get to. How can landscape architects create what would normally be a rural river experience within an urbanized and flood-engineered river location?

This research suggests that the urbanised section of Hutt River has a range of potential swimming sites but they have challenging technical issues and remain under explored. These sites have the potential to be social points along the river bringing together different communities for a joint experience, The on-the-ground experience of river swimming and the social enjoyment of swimming has been given little attention by designers. Initial field work was carried out to construct an understanding of the current ways that swimming and swimming spots within the wider Wellington region function.

This thesis will investigate how to create a fully urban swimming experience, focused on three strategically chosen sites, drawing on the fieldwork, where each site is intended to become a social gathering place and experience suited to its location and surrounding neighbourhoods.
The imperfect reality - Triggering the sensory system
Authors:   , McKeown Sarah
Published: September 2022

The sensory relationship that humans have with our interior spaces dramatically shifted as a consequence of COVID-19 and its related safety restrictions. With the introduction of worldwide, and subsequent dramatic increase in amount of time spent indoors, demand for positive and comforting interior spaces has grown. This thesis investigates how manipulation of light, colour and contrast can create a positive atmosphere – orchestrating spaces to evoke positive emotions to influence inhabitants’ rituals and wellness. Colour and light installation artists and theorists such as Olafur Eliasson, Yayoi Kusama, Isle Crawford and their works are explored, in doing so, the writer has sought to better understand the relationship that colour, light, and contrast have when inserted into interior spaces, particularly in COVID-19 living conditions.

The purpose of this research is to inform how to better create sense of atmosphere within interior spaces, to provoke positive emotion. The purpose is apt, given widespread and acute feelings amongst society that 2020-2021 has been a period of ‘languishing’; ‘failing to make progress of be successful and indicating tender sentimental melancholy’. A critical analysis of these designers’ theories and precedents – has proffered insights which the writer has explored through a series of experimentative art and performance exhibitions, each encouraging dynamic and interactive feedback. The feedback offers insight as to how to appropriately progress in further experimentations based on the participants’ emotion and connection to the installations. The conclusion made in this research aims to habituate design thinking to accommodate personal perception and preference in temporary and/or permanent interior occupations.
Curbing the A to B Mentality
Authors:   , Morris Jeremy
Published: September 2022

Internationally, Mass Rapid Transit (MRT) is used to catalyse city growth using transit-oriented development (TOD), with a focus on giving more people easier access to frequent public transport. Light rail networks (such as in Seattle) are extremely successful at this, prioritising A to B networks which move people efficiently, resulting in intensified areas around regularly spaced transport nodes. These compact areas boost social and economic activity, seeking to provide pedestrian friendly environments in close proximity to amenities. However, as the model becomes more widespread, a challenge arises in weaving this into the existing suburban fabric in a way which enhances existing life, rather than smothering it in tall, identical apartment blocks. This thesis asks the question, “how can localness and casual street appropriation structure Mass Rapid Transit and housing intensification in Wellington’s suburbs?

After exploring LRT and BRT heavily, this research focuses on the trackless-tram, a modern technology which has been heavily criticised for advertising its “tram like appearance,” overshadowing its potential social ability and synergy with street life, which has had little attention to date. By designing this new way of thinking about MRT in Wellington, the system goes from one which catalyses a controlled node of development, to one which encourages a matrix of development which is intrinsically local and engrained in existing neighbourhood life.

Newtown was chosen as the study area to apply this thinking, where intensive fieldwork studying local dynamics uncovered ways of representing and designing with casual appropriation and building-street synergies. This lead to the creation of a socially driven development scheme structured around localness and casual appropriation.
The Daily Collective
Authors:   , Lutyens Kate
Published: September 2022

How can interior architecture stimulate joy in a monotonous journey, challenging the perception of the daily commute through enhancing connection between both commuters and their cityscape?
Pengaruh Literasi Keuangan, Efikasi Diri, dan Love of Money Terhadap Minat Berwirausaha Mahasiswa Prodi Pendidikan Ekonomi STKIP PGRI Jombang
Authors: Effrisanti Yulia , Wahono Heru Totok Tri
Published: September 2022

The number of unemployed is still high and the low ratio of entrepreneurship in Indonesia, encourages the government to increase the entrepreneurship ratio index by creating young entrepreneurs. This study was to determine the influence of financial literacy, self-efficacy, and love of money on entrepreneurial interests. This study is quantitative research. The research population was 180 students of the economic education study program of STKIP PGRI Jombang. The research sample was 66 students. The research instrument uses a questionnaire. Data analysis techniques use t-tests, F-tests, and multiple linear regressions. The results showed that partially, financial literacy did not affect the interest in entrepreneurship. Meanwhile, self-efficacy and love of money partially affect the interest in entrepreneurship. Simultaneously, financial literacy, self-efficacy, and love of money affect the interest in entrepreneurship.
Erlezaintzako jardueraren ingurumen-utilitateek eta utilitate sozioekonomiko eta soziokulturalek duten garrantzia
Authors: Etxegarai Legarreta Olatz , Sanchez Famoso Valeriano
Published: September 2022

Enpresa gutxik eskaintzen dituzte erleek eta erlezaintzak eskaintzen dituzten beste ondasun eta zerbitzu desberdin; produktu horiek gehienak ukiezinak dira, eta, beraz, balioztatzeko konplexuak. Aniztasun horrek eta kanpo-efektu positiboak sortzen laguntzeak ingurumen-, ekonomia- eta gizarte-interesak bateratzen dituzte eta erlezaintza-jarduera bioekonomiaren ezinbesteko zati bihurtzen dute. Hala ere, bere berezitasuna gorabehera, askotan oharkabean pasatzen da edo ez da behar bezala ezagutzen. Aukerak dibertsifikatu eta sektorean eragile berriak agertzen diren testuinguruan, lan honen helburua da erleen eta erlezainen arteko binomioan oinarrituta sortzen diren utilitateen multzoa —ondasun eta zerbitzuak— miatzea eta identifikatzea, baita haien arteko harremanak aztertzea ere. Amaitzeko, etorkizuneko ikerketa-ildoak proposatuko dira.
EFFECT OF WATER-HOLDING AGENTS ON THE DECORATIVE QUALITIES OF THE LAWN COVERING
Authors:   Timirâzevskaâ selʹskohozâjstvennaâ akademiâ, TAZINA S.V. , TAZIN I.I.
Published: September 2022

The effect of wetting agents on the decorative qualities of the lawn covering formed by the plants of the bentgrass (Agrostis stolonifera L.) of the ‘PLS’ variety mixture has been studied. The studies were carried out in a small-plot field experiment on sandy soil, in the conditions of the Moscow region. All research is aimed at studying the demand in the golf industry, which will help to understand the effectiveness and appropriateness of the use of investigational agents. Watering is an important operation necessary for the normal growth and development of perennial grasses growing on a well-drained sandy profile of golf courses. It is also quite costly. Currently, there are a huge number of different agents, technologies and tools for monitoring the condition and care of the grass standg. According to the results of these studies, Revolution was the best wetting agent, with the lowest percentage of dry patches and optimum soil moisture throughout the entire study. According to the main indicators of decorativeness of the bentgrass, the highest scores on the NTEP scale were in the bentgrass stands with the use of Revolution in the volume of 20 l/ha: germination (6 / 6.6 / 5.6), color (6.6 / 7.6 / 6), uniformity (4.3 / 7 / 7.3) germination (6/6.6/5.6), colour (6.6/7.6/6), uniformity (4.3/7/7.3); with the use of Revolution in the volume of 10 l/ha – germination (5.6 / 6.6 / 5.6), color (6.6 / 7.6 / 6.6), uniformity (4.6 / 7.6 / 6).
DYNAMICS OF THE CONTENT OF TRACE ELEMENTS DURING DEVELOPMENT OF LOW-YIELDING FALLOW LANDS OF THE UPPER VOLGA REGION
Authors:   Timirâzevskaâ selʹskohozâjstvennaâ akademiâ, SHEVCHENKO V.A. , POPOVA N.P. , SOLOV’EV A.M.
Published: September 2022

The studies were carried out at LLC Ruch’evskoe-1, Rzhevsky district, Tver region in 2012…2018 during development of low-yielding, previously reclaimed lands that were retired from circulation. The total area of arable land is 5297 hectares, the soils are sod-podzolic, light loamy in terms of particle size distribution. The effect of the systematic application of high doses of organic fertilizers from pig-breeding complexes in the form of solid fraction of manure (60…80 t/ha) and liquid waste (100…120 m3/ha) on the dynamics of the content of copper, zinc, boron and manganese in the arable layer has been studied. It was found that during the six-year observation period on soils with a leaching type of water regime, the average weighted copper content had only positive tendency to increase as the increment to the initial value was 0.1 mg per a kilogram of soil (0.1 mg/kg), which was within the experimental error and amounted to 1.7 mg/kg at the optimal value for the region 2.45 mg/kg. A similar situation is typical in the study of the dynamics of zinc, the average weighted content of which reached 0.9 mg/kg, which is significantly lower than the optimal level of 3.55 mg/kg. Consequently, with the deacidification of fallow lands from the introduction of alkaline organic fertilizers, a significant increase in the available forms of copper and zinc was not noted, which requires additional introduction of microelements to eliminate their deficiency. At the same time, the systematic application of high doses of organic fertilizers significantly improved the provision of low-yielding lands with boron and manganese, the content of which in the arable layer approached the optimal value and at the end of observations amounted to 0.50 and 44.8 mg/kg, respectively, with an optimal level of 0.52 and 50.5 mg/kg.
ASSESSMENT OF EFFICIENCY AND PHYTOTOXICITY OF HERBICIDES FOR CORN
Authors:   Timirâzevskaâ selʹskohozâjstvennaâ akademiâ, KUZNETSOVA S.V. , BAGRINTSEVA V.N.
Published: September 2022

The aim of our research was to study the effect of modern highly effective herbicides on weeds and corn plants. One of the criteria for assessing the effectiveness of herbicides is the manifestation phytotoxicity signs of on corn. Phytotoxicity reduces corn grain yield, and plant death may occur if significant damage occurs. The resistance of corn plants to herbicides is determined by the genetic characteristics of hybrids and self-pollinated lines, and depends on external factors, in particular, on air temperature during the chemical treatment of crops. Studies on phytotoxicity of herbicides were conducted for several years in the experimental field of the All-Russian Research Institute of Corn, which is located in the zone of sufficient moisture in Stavropol Territory, at an altitude of 541 m above sea level, 44°N, 43°E. Phyt otoxicity of herbicide Cordus Plus, VDG, was studied in 2017–2018, a tank mixture of herbicides Dublon Super, VDG + Aegis, SC in 2017–2019, herbicide Kreutzer, VDG – in 2018–2021. To study phytotoxicity of herbicides, the same set of hybrids and self-pollinated corn lines of different ripeness groups was sown in each year of research. In the prevailing favorable weather conditions in 2017–2018, the herbicide Cordus Plus destroyed most of the wees phytocenosis and did not cause phytotoxicity in the studied corn samples, except for the sensitive single cross hybrid Alpha M. Application of the tank mixture Dublon Super + Egida in 2017–2018 had no phytotoxic effect on hybrids and parental forms of corn plants. In 2019, under severe drought conditions, phytotoxicity of these herbicides was observed in most of the studied samples. The response of hybrids and self-pollinated lines to the application of Kreutzer herbicide over the years of research was different over the years of research. Even in the absence of drought, the herbicide effected harshly on some corn hybrids and lines and caused significant damage to the plants.
RESEARCH OF TECHNOLOGICAL PARAMETERS OF DEVICE AND REPAIR OF FLAT ROOF COATINGS
Authors: Korol Elena , Sadkovskiy Maksim
Published: September 2022

In the practice of modern construction, light concretes of low thermal conductivity are used as a heat-insulating layer of enclosing structures. In particular, they are used for warming flat roofs of buildings for various purposes. One of the effective methods of thermal insulation is the use of polystyrene concrete of low average density and thermal conductivity directly in construction conditions. Research has established a rational selection of the composition of this type of concrete for the installation of a monolithic heat-insulating layer, resource support for the technological process, including mechanization of work and qualification requirements for performers. Improvement of organizational and technological solutions for flat roofs based on the choice of rational parameters of technological processes and operations provides a reduction in labor intensity, duration and cost of work at the construction site. Comparison of technologies for the installation of roofing bases from deposited materials according to technical and economic parameters.
Stability Analysis and Numerical Simulation of Fractional Cholera Model
Authors: Khalaf Sanaa L.
Published: September 2022

The Vibrio cholera bacterium, which belongs to the Vibrionaceae family, is the source of the cholera virus. A bacterium known as Vibrio cholerae is the cause of the human disease cholera. This study developed a fractional epidemic model to describe the transmission of cholera. The model consists of four elements: susceptible people, infected people, recovered people, and a setting where the germs may flourish. The endemic and disease-free equilibrium points were calculated. The next-generation matrix was used in order to calculate the reproduction number. It has been proven that a disease-free equilibrium is capable of being locally asymptotically stable. To make sense of them and to compare them to the qualitative answers, numerical simulations of the fractional equations of the epidemic model were performed. According to the findings, the system's susceptible population decreases when more populations are restored. This study suggests that for outbreak and preventive initiatives, health professionals should make good use of the media
Fabrication of CdSe/Si Nanostructures Thin Films Heterojunction by DC Sputtering for Solar Cell Applications
Authors: Khudiar Ausama I.
Published: September 2022

CdSe nanocrystalin thin films were deposited onto silicon wafer using DC plasma sputtering method. Quantification of the crystalline size of CdSe thin films has been achieved by X-ray diffraction (XRD) technique. Otical properties of prepared CdSe thin films including absorption coefficient and optical band gap, have been analyzed and evaluated in the wavelength range of 250-850 nm. In addition, the current-voltage characteristics of a CdSe/Si hetero-junction have been examined, and the results show that lighting causes an increase in photo-current. The open circuit voltage was 2.0 V and the short circuit current was 0.18 mA. The abbreviation open circuit current is Voc.
Unmasking Deepfakes by Fusing Rich Features from Two-Stream CNN Model
Authors: Hadi Wildan Jameel
Published: September 2022

In contrast to the traditional object detection methods, image manipulation detection focuses on tampering artifacts instead of image content, indicating that more depth features must be learned to detect image manipulation. Deepfakes are one of these techniques that have appeared in recent times and need to learn a lot of the richer features to be detected. Deepfakes are a harmful application that affects all segments of society. It is meant to change the person's face and replace it with another person using deep learning techniques. In this paper, we contribute to finding a solution to detect the fakes. A new two-stream CNN model-based deep learning is developed, where two streams are combined, exploiting the fusion layer. Following the fusion layer, the data is classified using the classification layer. The first stream is a semantic stream to extract specific features from the RGB image input to identify manipulation artifacts such as blurring variation, the boundary of the face mask, and lighting difference. The second stream is a texture stream that exploits the texture features extracted from a Gabor bank filters layer. The proposed strategy significantly outperformed the previous methods that were in use. The measured performance metrics have an accuracy of more than 99.5%.
Hydraulic Characteristics of Dammam Aquifer in Sayed Al-Shuhadaa Agricultural city, Karbala- Iraq
Authors: Mahmood Rafal G.
Published: September 2022

This study's objective is to investigate the hydraulic properties of the Dammam aquifer utilizing three acceptable pumping wells for experimental pumping. The location under study is an agricultural project known as Sayed Al-Shuhadaa agricultural city, which is located in the Al-Ukhaidir section of the Ain Al-Tamar district, to the southwest of Razzaza Lake and west of the Holy Karbala province. Theis and Hantush methods had been applicated to analyze pumping test data. The ranges for transmissivity, hydraulic conductivity and storage coefficient are (111.3 - 1705.1) m2/day, (22.23 - 32.11) m/day, and (0.00075-0.0011) respectively. The agricultural city of Sayed Al-Shuhadaa was formerly a desolate desert, but it was transformed into an agriculturally productive region after (5000) donams of wheat were cultivated this season. The most important characteristic of this region is the use of pivotal irrigation systems of global origin, and the water source used in the farm is from the ground sea (groundwaterwater), as this source provides greater assurance of the sustainability of the farm's production, and aims to determine the hydraulic characteristics of the aquifer in the event that suitable wells are available for pumping tests. Calculating water excess and shortfall by performing the water balance. Assessing the appropriateness of groundwater for agricultural and irrigation purposes by analyzing its hydrochemical properties and quality. An attempt to implement a plan for agricultural groundwater management.
Dehydration of Beet Bagasse with Subsequent Extrusion and Their Physico-Chemical Parameters Comparison
Authors: Bakharev Vladimir , Voronina Marianna , Gulyaeva Alena , Nafikova Olesya
Published: September 2022

Beetroot is a good source of minerals, fiber and biologically active components. The researchers carried on the investigation to study the quantitative changes in dietary fibers and sugars during the drying of red table beet with forced ventilation and subsequent extrusion. They run the comparative analysis of the physico-chemical parameters of beet processing products. To analyze the content of dietary fibers and sugars, a man took beet bagasse: fresh, dried in a drying cabinet with forced ventilation, dried and passed through an extruder. The authors examined drying method effect on the physico-chemical parameters and organoleptic characteristics of beets. The physico-chemical and organoleptic indicators analysis results showed that the extrusion technology use when drying beet bagasse increased the extractive substances yield, as well as the shelf life of dried samples. When drying with forced ventilation, the dietary fiber amount increased by 20 times; and when processing dried beet by extrusion – by 5%. The obtained results provide an understanding of the extrusion technology impact on the physico-chemical, organoleptic qualities of a dry semi-finished product that can be utilized as a natural ingredient in the production technology of functional food products.
Development of Adaptogenic Beverages from Arctic Raw Materials for the Far North Residents
Authors: Zavorokhina Natalia , Mysakov Denis , Bochkova Anastasia
Published: September 2022

The extreme living conditions of the Far North inhabitants contribute to the specific metabolism formation: the sugar content in the blood decreases by 40–45 %; proteins and fats supply with the energy, as in regions with a warmer climate, compared to the regions with a warmer climate where carbohydrates provide it. The research aims at developing adaptogenic drinks for the Far North residents, considering their metabolism peculiarities and extreme living conditions. The researchers analyzed the main factors shaping the metabolism specifics of the indigenous population of Russia, including the lack of agriculture, extreme climatic conditions, vitamin D deficiency due to the sunlight deficiency, vitamin C due to the plant food shortage, polar stress syndrome and piblocto. A man revealed that the Northerners faced the deficiency of selenium – up to 80 %, vitamin C – up to 69.4 %, zinc – up to 37.5 %, magnesium – up to 27.6 %, phospholipids – 35.8 %. The authors developed the “Vatutel” and “Vatu–tsai” drinks formulations based on Arctic vegetable raw materials with cryoprotective properties traditional for the indigenous population diet – cowberries, cranberries, rosehip fruits, narrow-leaved cypress, calendula officinalis, as well as vitamin premix, flaxseed flour containing water-soluble pentosans that form the drink consistency. They also formulated the technology and recipe of frozen semi-finished product for the drink “Vatu–tsai” with and without capsaicin have been developed. A portion of the drink “Vatu–tsai” contains (from the daily intake rate): 3.59 % vitamin D3, 5.38 % vitamin C, 4.31 % vitamin E, 4.32 % beta-carotene, 5.33 % zinc, 1.44 % selenium. The developed drinks are made from ingredients available to the Far North population growing in places of residence; have a simple manufacturing and storage technology; increase the body adaptation to extreme conditions due to vitamins E, D3, C; consumed hot (75 °C) they reduce cold stress, including due to capsaicin in the composition; and consider metabolism and traditions peculiarities of the population.
The effectiveness of Powerpoint-iSpring integrated multiple chemical representation learning media on acid-base materials to improve students learning outcomes for Senior High School
Authors: Riska Seiski Afrita , Guspatni Guspatni
Published: September 2022

We have previously produced a PowerPoint-iSpring Integrated Learning Media Multiple Chemical Representations on Acid-Base Materials. It is valid and practical but has not been tested for its effectiveness on student learning outcomes in Senior High School. The research is experimental with a quasi-experimental design with a Non-equivalent Control Group Design. The research population is all class XI Senior High School students for the 2021/2022 academic years. Purposive sampling was used as a sampling technique with homogeneous sampling criteria. The classes selected as samples were class XI MIPA 1 as the experimental class and class XI MIPA 2 as the control class. The instruments used were questionnaires and student learning outcomes tests in the form of 20 multiple choice questions. The N-Gain and hypothesis testing were carried out for data analysis with an independent sample t-test. Based on the data analysis, the N-Gain of the experimental class was higher than the control class with the medium category. PowerPoint-iSpring Integrated Learning Media with Multiple Chemical Representations on Acid-Base Materials is Effective for Improving Learning Outcomes of Class XI Senior High School Students.
A Novel space vector modulated DTC scheme of induction motor drive with a single PI controller for electric vehicles
Authors: MALLA Mohan , GUDEY Satish Kumar
Published: September 2022

Facilitating instantaneous torque and smooth speed of Electric vehicle (EV) largely relies on modulation scheme employed and type of controller used for motor drive system. The DTC-SVM (Space Vector Modulation) approach with two PI controllers has an excellent steady state and transient response. However, there is still a need to reduce stator current and torque ripples in induction motor for application in Electric vehicle. This paper presents a new approach to minimize stator current harmonics, torque ripple of an induction motor drive with appropriate gain value for torque PI controller. Good performance of the induction motor drive is achieved using a single PI controller. Both flux and torque are controlled effectively with less torque ripple. In this study, torque and current ripples are obtained at full, one-half and one-fourth of the rated speeds at rated torque value. This work analyzes the transient operation of the drive for unit step change in command torque at various rotor speeds. Space Vector Pulse Width Modulation (SVPWM) of the drive at constant switching frequency is presented. Modeling and Simulation is performed in the stationary reference frame theory. The performance is observed during steady state and transient operations. The settling time of torque responses and stator currents are obtained during transient conditions. Torque ripples are obtained during steady state. A comparison with DTC-SVM with two PI controllers for the same Torque commands is well understood. Total Harmonic Distortion (THD) in the motor input current at different reference fluxes are tabulated for classical, two PI controllers and a single PI controller. The proposed DTC-SVM scheme with single PI controller is found to be robust with good steady state and transient characteristics with less settling time and is validated with flux vector trajectories.
Coprophilous fungi of Daloa city: New species for the fungal flora of Côte d'Ivoire
Authors: N'Douba Amako Pauline  , Kouassi Kouadio Claude  , Koffi N’Dodo Boni Clovis  , Douira Allal  , Ayolié Koutoua
Published: September 2022

Objective: The objective of this work is to assess the diversity of coprophilous species growing on cow dung in Daloa locality. Methodologies and results: The study was conducted in Daloa city. This locality is located in a forest area, with a tropical climate favorable to the development of fungi. Several dried samples of cow dung were collected during field trips in the city. Coprophilous species growing on cow dung were collected in the field. In the laboratory, the dung samples were moistened and placed in a humid chamber, in the dark and at a temperature of 28ºC. Microscopic and macroscopic observations were made on the fruiting bodies obtained for species identification. Conclusion and application of results: At the end of this study, six (7) coprophilic fungi were identified. Among these species are three (3) Ascomycetes: Ascobolus immersus, Fimetariella microsperma, Coprotus aurora. Three (3) Basidiomycetes were observed: Coprinopsis nivea, Coprinopsis lagopus, Psilocybe coprophila. One (1) Zygomycetes was reported, it is Pilobolus crystallinus. All these species are new to the fungal flora of Côte d'Ivoire.
Comparative analysis of heavy metals concentration in soil and vegetable (Solanum lycopersicum) collected from two sampling sites (Farmland and Dumpsite) and the effect on plant DNA
Authors: Adu A.A.  , Aderinola, O.J.  , Ogbe, A. A  , Sanni, S.O  , Olakunle, O.E  , Buhari, Q. A.
Published: September 2022

One of the most popular crops with a unique role in human diets especially in Nigeria is Solanum Lycopersicum. The study investigated the levels of heavy metals (cadmium (Cd), chromium (Cr), copper (Cu), lead (Pb)and zinc(Zn) and nutrients(nitrogen (N), phosphorus(P) and potassium(K) in the leaf, stem and root of Solanum lycopersicum and soil collected from dumpsite (in Ojota) and Farmland (in Badagry) in Lagos, Nigeria and their effects on S. lycopersicum using DNA analysis. The results recorded in mg/100g showed that only the value of Zn in stem of S. lycopersicum from farmland (77.671 ± 2.193) was significantly higher than that of dumpsite (72.169 ± 1.656) while Zn in the root S. lycopersicum from farmland (66.556 ± 0.613) was significantly lower than that of dumpsite (71.760±2.699). The values of K in the stem and root, P in the leaf, and N in the stem and root were higher in samples from farmland, while samples from dumpsite had higher value of N in leaf, P in stem and root and K in leaf. Only, Zn in the soil was significantly higher (p<0.05) at dumpsite than farmland. The values of N, P and K in soil from dumpsite were higher (p<0.05) than that from farmland. The DNA bands of the Solanum lycopersicum from control site and dumpsite site have no alteration. In conclusion, all the metal levels did not exceed World Health Organization limits and thus S. lycopersicum is safe for human consumption.
Pulmonary alveolar microlithiasis: A case report from Morocco with review of literature
Authors: Imane SAIDI  , Meryem BOUGADOUM  , Maryem HINDI  , Salma AIT BATAHAR  , Salma AIT BATAHAR
Published: September 2022

Background: Pulmonary alveolar microlithiasis (PAM) is a rare infiltrative chronic lung disease characterized by deposition of spherical calcium phosphate microliths called calcospherites within the alveoli with predominance in lower and mid zones. Etiology and pathogenesis is not fully understood. Case presentation: We report a case of 58 year old female patient presenting with progressive shortness of breath and chronic bronchitis over a period of 4 years. Physical examination revealed she had signs of chronic respiratory failure. Chest radiograph showed dense micronodular opacities giving classical sandstorm appearance. High resolution computed tomography showed diffuse microcalcifications, bilateral ground glass attenuation and septal thickening with calcification along the interlobar septa and subpleural regions. Conclusion: According to our research this is the 15th case of PAM that has been declared in Morocco. Given the rarity of this entity, the purpose of this study was to increase knowledge of this disease among pulmonologists, in order to provide timely diagnosis.
A New Approach to Estimate Archie Parameters m and n Independently From Dielectric Measurements
Authors:   Baker Hughes, Al-Ofi Salah , Ma Shouxiang ,   Saudi Aramco, Kesserwan Hasan ,   Baker Hughes, Jin Guodong ,   Baker Hughes
Published: September 2022

Archie equation is the foundation of modern petrophysics and parameters m, cementation exponent, and n, saturation exponent, are critical inputs of Archie equation. Traditionally, m and n are obtained from core analysis, which are available only in cored formations, and the process is costly and time consuming. It is always desirable if m and n can be derived continuously from downhole measurements, such as multi-frequency dielectric logs, the objective of this study. Using an open-ended coaxial laboratory test probe operating between 10 MHz and 1 GHz, multi-frequency dielectric data are measured on clean outcrop core samples of both carbonate and sandstone. The data are analyzed by using the traditional dielectric interpretation models assuming that m equals to n i.e., considering matrix and hydrocarbon as one phase and water as the second phase, the MN approach. To extract m and n individually so that they can be properly used in Archie equation, our approach considers matrix, hydrocarbon and water as three different phases in dielectric data processing, by applying effective medium theory on the formation rock in two steps: first between water and hydrocarbon resulting in an effective fluid permittivity, then second between effective fluid permittivity and matrix. Results are compared and validated with m and n from core analysis using resistivity measurements. The derived m and n from dielectric data using the new method show significant improvement over the MN approach. When compared with data from resistivity tests, the single-phase property m derived from the new method performs much better than that from MN approach. As for the two-phase property n from the primary drainage experiment, a significant improvement is also realized. The findings were consistent for different lithologies, sandstone and carbonate. When using m and n derived from the new approach to interpret resistivity data for water saturation of core plugs, the average uncertainty is improved from 13%, when MN is used, down to 4%, when m and n are used. Using the new method presented in this study to interpret multi-frequency dielectric data has the potential to be implemented in interpreting downhole dielectric logs for continuous Archie parameters m and n, resolving a long-standing challenge in formation evaluation.
Comparison of Raman, Brillouin, and Rayleigh Distributed Temperature Measurements in High-Rate Wells
Authors:   ExxonMobil Upstream Research Co., Seabrook Brian C. , Ellmauthaler Andreas ,   Halliburton, LeBlanc Michel ,   Halliburton, Jaaskelainen Mikko ,   Halliburton, Maida John L. ,   Halliburton, Wilson Glenn A. ,   Halliburton
Published: September 2022

With the maturity of and demand for fiber optic sensing technology growing steadily over the last few years across multiple basins, operators are seeking fiber optic sensing solutions that address the technology challenges associated with life-of-field monitoring of subsea developments. Single-ended distributed temperature sensing (DTS) are typically acquired using Raman optical time-domain reflectometry (OTDR) on multi-mode fiber. However, for topside interrogation of subsea completions, Raman DTS performs poorly due to the available optical power budget, and the wavelength dependency of the measured Stokes and anti-Stokes intensities, as the temperature profile is calculated as a function of the ratios of these signals. The optical attenuation across connectors and splices may, in many instances, have a wavelength dependence that varies with temperature and/or directionality of the propagation of the optical signals. Any wavelength dependent attenuation as the signals pass through connectors, splices and optical feedthrough systems will generate step changes in the measured temperature profile. Brillouin OTDR can provide a DTS alternative that overcomes these challenges and operates on single mode fiber. Brillouin OTDR operates with a large dynamic range to measure a wavelength (frequency) shift of the Stokes/anti-Stokes components that is proportional to both strain and temperature. Since downhole cables are manufactured with optical fibers suspended in a gel and with appropriate extra fiber length (EFL), any fiber strain relaxes, and the Brillouin wavelength shift is an absolute temperature measurement. We typically associate coherent Rayleigh OTDR with distributed acoustic sensing (DAS) on single-mode fibers, but low frequencies also contain a relative temperature dependence. In this paper, we report on a comparison of Raman, Brillouin, and Rayleigh DTS simultaneously acquired in the same high-rate producer and injector wells. We validate that, with appropriate cable design, Brillouin DTS can be simultaneously operated on the same single-mode fiber with DAS, and can deliver absolute temperature measurements suitable for production analysis. We conclude with a discussion about the implementation of this DAS-DTS solution for sensing subsea completions.
Signal Processing and Machine Learning for Effective Integration of Distributed Fiber Optic Sensing Data in Production Petrophysics
Authors:   LYTT LTD, Mendoza Alberto , Cerrahoğlu Çağrı ,   LYTT LTD, Delfino Alessandro ,   LYTT LTD, Sundin Martin ,   LYTT LTD
Published: September 2022

Distributed fibre optic sensing (DFOS) is progressively being considered in the mix of customary surveillance tools for oil and gas producing assets. Its applications are beyond monitoring of wells for production and reservoir optimization, including detection of well integrity risks and other well completion failures. However, while DFOS can uniquely yield time-dependent spatially distributed measurements, these are yet to be routinely used in formation evaluation and production logging workflows. The large volumes and complexity of time- and depth-dependent data produced by DFOS often require the usage of Digital Signal Processing (DSP) to reduce the amount of stored data and data-driven techniques such as machine learning (ML) for analysis. Distributed sensing data is sampled at high rates; up to 10,000 samples per second and depth for Distributed Acoustic Sensing (DAS), and one sample per minute and depth for distributed temperature sensing (DTS). The high sampling rate in time, across hundreds or thousands of meters, creates a big data problem. Consequently, managing and transferring data acquired in the field to an expert analyst is extremely challenging. Even when these data management challenges are overcome, the amount of data itself is still not suitable for manual analysis. Starting from edge computing for feature extraction, we illustrate the principles of using DSP and ML to effectively handle the challenges of analyzing time-dependent distributed data from DFOS. Results enable integration of DFOS with customary formation evaluation and production surveillance workflows. Feature extraction, a crucial DSP step used to generate inputs to ML, reduces data size by orders of magnitude while ML models analyse continuous data streams from the field. We derive thermal features from DTS data effectively characterizing Joule Thomson effects. Moreover, we combine DTS thermal features with acoustic features from DAS in supervised ML for multiphase downhole inflow predictions. In so doing, we have successfully applied ML on DFOS for real-time detection of sand production, production and injection profiling, and well integrity surveillance. With use cases in a range of well completion types and well operating conditions, we demonstrate an endto- end system of DFOS that effectively integrates DAS and DTS into routine analysis techniques for Formation Evaluation Specialists and Production Petrophysicists.
Covid-19 Awareness for Baiturrahmah Padang Bachelor of Dental Medicine Students
Authors: Pandu Sri pandu utami , Intan Batura Endo Mahata  , Hiranti Syorga Harien
Published: September 2022

Background: Coronavirus, or SARS-CoV2, is one of the main pathogens that attack the human respiratory system. The coronavirus disease caused by SARS COV2 represents the causative agent of a potentially fatal disease of global public health concern. West Sumatra is in the top 10 provinces that contributed the most COVID-19 cases in Indonesia. 1st According to the official website of the Health Padang City Service on September 22, 2020, 2385 confirmed COVID-19 people, 1426 people recovered from COVID-19, and 53 people died.  The high incidence of positive cases of Covid-19 in Padang is due to a lack of public knowledge and adherence to government-mandated health practices. Dental care places have a risk of COVID-19 infection due to aerosols generated during procedures, handling of sharp objects, and the proximity of dentists to patients. Dentistry students must have an awareness of deep knowledge, a better understanding, and must be updated with the practice of adapting to identify possible COVID-19 infections. Objective: The aim is to increase awareness about COVID-19 among undergraduate dentistry students at the Baiturrahmah Faculty of Dentistry, Padang. Methods: This type of research is called descriptive research. The target population of this study was undergraduate dentistry students in 2017, 2018, and 2019, with a sample of 175 people. This research was conducted online in the city of Padang using Google Forms Media for distributing questionnaires. When the research was carried out in September 2020. Results:  The results showed that as many as 99.4% of respondents had good knowledge awareness about COVID-19, 0.6% awareness of bad knowledge, 97.7% of respondents got the first information about COVID-19 through the media, 56% of respondents got the latest Covid information via the internet, only 11.4% of respondents are taking Covid-19 courses, and 5.1% are still taking courses until now. The method of data analysis in this study used the SPSS program with univariate and bivariate analysis. The processed data is presented in table form. Conclusion: Students have awareness about COVID-19.
Perbedaan Kekerasan Permukaan Resin Komposit Setelah Paparan Asap Rokok Filter dan Rokok Elektrik
Authors: Alvi Rizqi Amaliyah  , Arwin Diva Nafida  , Berta Ivana Priladiantika  , Bambang Tri Hartomo
Published: September 2022

Resin komposit merupakan bahan tumpatan gigi yang memiliki beberapa sifat mekanis salah satunya yaitu kekasaran permukaan. Kekasaran permukaan dapat meningkat karena beberapa faktor seperti kebiasaan merokok. Jenis rokok yang banyak digunakan digunakan di Indonesia pada urutan kedua dan ketiga yaitu rokok filter dan elektrik secara berurutan. Kedua jenis rokok ini dapat mempengaruhi kekerasan permukaan resin komposit karena menghasilkan penurunan ph saliva yang dihasilkan dari asap rokok. Tujuan: Penelitian ini bertujuan untuk mengetahui perbedaan kekerasan permukaan resin komposit setelah paparan asap rokok filter dan rokok elektrik. Metode: sebanyak 27 sampel resin komposit nanohybrid yang dibagi menjadi tiga kelompok kemudian dilakukan perlakuan yang berbeda. Selanjutnya seluruh kelompok dilakukan uji kekerasan permukaan menggunakan vicker hardness tester. Hasil: uji kekerasan permukaan resin komposit menunjukkan terjadinya peningkatan pada kelompok kontrol dan terjadi penurunan pada kelompok perlakuan yaitu dengan penurunan tertinggi pada kelompok perlakuan asap rokok filter. Hasil uji paired t-test dan one-way ANOVA menunjukkan nilai p yaitu >0,00. Kesimpulan: tidak terdapat perbedaan signifikan sebelum dan sesudah pemaparan asap rokok filter maupun elektrik