bluuebunny/crossref_metadata_2025 huggingface dataset:
The Impact of Real Estate Investment on Profits in the Real Economy
Authors: Chen Xinci
Published: January 2023

In recent years, with the rapid development of the virtual economy, the real economy, which is the cornerstone of China's national economy, has seen the phenomenon of "turning from real to virtual". A large number of real enterprises deviate from their main business direction and invest funds in the high-risk, high-return real estate industry. Based on the panel data of 30 provinces, municipalities and autonomous regions in China from 2000 to 2020, this paper constructs a two-way fixed-effect model to discuss the relationship between real estate investment (Rei) and real economic profits (Profit). The study found that Rei has a significant negative effect on real economy profits, and this effect is regional heterogeneous: in the eastern and western regions, Rei significantly suppresses real economy profits, but in the central region, there is no obvious impact. This paper provides a new perspective for the research on Rei and the development of the real economy, reveals the impact of Rei on the profits of the real economy, and further provides policy suggestions for regulating the cross-industry investment of real enterprises and promoting the coordinated development of the two.
NVIDIA's Investment Feasibility and Weighted SWOT Model
Authors: Zhao Muyuan
Published: January 2023

As one of the leading enterprises in the semiconductor industry, Nvidia has many advantages and opportunities in the development process, but there are also many threats and challenges. In financial analysis, investors' research on the company's financial statements will help them fully understand the company's operating conditions. This paper will take Nvidia as an example, and propose an improved weighted SWOT model by analyzing the company's annual report, financial authority data, relative valuation, local government policies, media news and other factors. The output result of the model will represent whether the company is worth investing. The conclusion of this paper is that the negative coefficient of feedback in the model shows that Nvidia is not a good investment object in the short term. After verification, the model can provide investors with more rigorous and scientific analysis methods to avoid impulsive investment.
Discriminant Analysis of Financial Sectors
Authors: Wang Zhitong
Published: January 2023

The Machine learning has been wide used and trained to do jobs to analyze companies’ performance based on the financial data, and the portfolio managers have widely accepted the use the machine learning as a tool to assist company analysis and investment decision making. As a result of the test performed above, the discriminant test, investors can train the model to distinguish performance of the companies, whether it will perform at the top 25% of the sector or bottom 25% of the sector, from the financial/banking sector based on the financial ratios of net income/revenue and total debt/total liabilities or EBIT/revenue and total debt/total liabilities.
Research on Business Model Innovation based on Big Data Analysis in Internet Plus
Authors: Li Pengfei
Published: January 2023

Business model is considered to be the integration of enterprise economic structure, operation management and strategic management. Through the operation of business system, it can improve performance, create consumption value, build internal structure and finally form a unique competitive advantage in the market. Because the information that a natural person can use to choose investment projects is limited, the decision-making under the condition of limited information seriously affects the rational level of his investment and reduces the efficiency of his investment decision-making. As far as the development of big data in China is concerned, the Internet is the fastest field for the development and application of big data technology. Operators such as Baidu and Taobao have begun to take shape, and the services provided by them have also become the main source for the public to experience and know about big data. Based on the analysis of big data under the background of Internet, the process of enterprise value creation has been changed, and data-driven production and operation activities have been realized. At the same time, the mobile Internet has changed the interactive way among members of the value network, and made real-time and interactive value transfer possible.
Application of Traditional Chinese Medicine Residue and Its Derivatives in Sewage Treatment
Authors: Zhang Yuming , Wang Zilin
Published: January 2023

As traditional Chinese medicine treatment has received extensive attention in the treatment of novel coronavirus in recent years, output of Chinese medicine residues (CMR) increases. The produced CMR may lead to secondary pollution and waste of resources improperly, but it also can bring huge benefits for environmental protection as a potential resource with high efficiency. This article analyzes the advantages and disadvantages of a variety of CMR treatment methods over these years, investigates and summarizes the previous literature from the aspect of wastewater treatment, then finds that CMR and their derived materials can efficiently and stably absorb some pollutants as new adsorbents after modified treatment. In this article, the pollutants were divided into two main categories: heavy metals and organic matter. Varieties of treatments were proposed and their feasibility of application to wastewater treatment. The mechanism for the pollutant removal is further analyzed, where the adsorption methods include physical and chemical types. Research on the application of the CMR in wastewater is still in its infancy in terms of practical applications, but this research has great potential for development. In the process of recycling and application of the CMR, economic benefits would be brought to society and treatment methods of wastewater would be improved. Future research should be orientated to the study of adsorption treatment of large flow rates and mixed wastewater with multiple pollutants.
Environmental Consequences of Mining Bitcoin: The Carbon Emission in China
Authors: Xie Bolun
Published: January 2023

In recent years, as cryptocurrency has been recognized by more people and the value of the cryptocurrency has increased, many people make money through mining. It leads to mining becoming popular but also creates serious environmental problems. Mining bitcoin will consume much electricity and thus emits more greenhouse gases such as carbon dioxide, which has caused worldwide environmental issues. This paper will focus on figuring out that mining bitcoin will cause how much carbon emission damage in China during these years. The result of this research will provide the change in carbon emission with time and the prediction of the carbon emission trend caused by bitcoin mining in the future. This result of the article aims to focus the society and the government's attention on the damage mining bitcoin does to the environment and also provide suggestions on the measures the governments should take to reduce the unessential energy cost of bitcoin mining.
Sintering Property and Hydration Resistance of CaO-Y2O3 Composite Materials
Authors: Yan Zhengguo , Li Zhonghua , Yue Qing , Yang Wengang , Liu Tao , Yuan Lei , Yu Jingkun
Published: January 2023

A preparation method of CaO-Y2O3 composite materials and its sintering property and hydration resistance were investigated in this paper. The CaO-Y2O3 core-shell structure powders were obtained by precipitation, after calcination, pressing and sintering the CaO-Y2O3 composite materials were prepared. The obtained powders and composite materials were characterized by crystalline phase formation, thermodynamic property, density, hydration resistance and microstructural analysis. The results showed that the prepared CaO-Y2O3 core-shell structure powders had good coating property, the sintering property and hydration resistance of composite materials were excellent. As the molar ratio Ca to Y was 1:1, the relative bulk density was 95.68%, the apparent porosity was 1.28%, and the hydration weight gain rate of the sample after 21 days in the atmospheric environment was 0.45%.
Electrocatalytic Reduction of CO2 Based on Transition Metal Catalysts
Authors: Jiang Xuan , Liu Faguang , Ren Jiahe
Published: January 2023

As the modern industry develops, the issue of a large amount of fossil fuel emissions is becoming more and more prominent, which leads to a sharp increase of the carbon dioxide (CO2) in the atmosphere and aggravates the greenhouse effect. Environmental problems like global warming become difficult for human being. How to reduce global warming and ensure energy supply is an urgent problem to cope with. With the deep research on this problem, there are many mature technologies, for instance, thermochemical reduction, photochemical reduction, and electrocatalytic reduction, among which the electrocatalytic reduction technology has the advantages of easy control of the reaction process, high Faraday efficiency, and can be scaled up based on the market needs. In this research, various catalysts ranging from traditional transition metal catalysts to new two-dimensional transition metal MOFs derivatives and new organic ligands will be introduced from the aspects of catalytic efficiency, catalyst stability, product selectivity, etc. This research aims to introduce and promote this series of catalysts and the analytical methods, at the same time, provides ideas for new research in the future.
CO2-CH4 Reforming Based on Nickel-based Catalysts
Authors: Cui Runjia , Shen Yili , Wang Chunxu
Published: January 2023

The current environmental problems are serious in nature. Due to greenhouse impact and a series of chain reactions caused by the massive emission of carbon dioxide (CO2) into the atmosphere, the ecological environment of the earth has been seriously damaged. The removal and reuse of CO2 is a current hot topic. The use of two greenhouse gases, CO2 and methane (CH4). And these two greenhouse gases can be used to produce different industrial products. However, the CO2-CH4 reforming reaction is difficult. The introduction of a catalyst in the reaction can avoid the problems of low conversion rate, long time and high energy consumption. At present, nickel-based catalysts are being greatly concerned in this reaction due to their low cost and high efficiency. Based on this background, this research focuses on four preparation methods for nickel-based catalysts, including deposition precipitation method, reflux impregnation method, solution combustion method and ammonia evaporation method. Three types of nickel-based catalysts, including single metal nickel-based catalysts, bi-metallic nickel-based catalysts, and multi-component nickel-based catalysts, are introduced about their activity performances in the CO2-CH4 reforming reaction. To sum up, the introduction of nickel-based catalysts can promote the directional regulation of reaction products, which can be carried out faster, saving energy and reducing consumption, which has very important research significance.
Synergistic Effects of Biochar and Microbes on Soil Remediation
Authors: Sun Haifeng , Wang Yinuo , Wu Qilei
Published: January 2023

With the development of science and technology progress, while improving the quality of life has caused some pollution to the soil environment, this pollution has threatened the ecosystem and even human health. However, how to carry out soil remediation actively and effectively is the current problem faced. Several common soil remediation methods have their drawbacks that cannot be widely used. Therefore, research on the synergistic effect of biochar and microorganisms on soil remediation is urgent. The feature of microbial remediation technology without secondary contamination combined with biochar can be used as a high-quality amendment to assist in the remediation of soils contaminated with heavy metals and total petroleum hydrocarbons (TPHs). There have been many researches in the field of biochar in the past years, and its loose and porous characteristics and carbon stability provide suitable conditions for the survival and growth of microorganisms. Moreover, as a carrier, biochar can co-operate with microorganisms to absorb and degrade pollutants. The use of biochar combined with microorganisms in remediation not only reuses agricultural waste but also reduces some of the costs. In addition, the research on soil remediation in China started late, and there are large differences between the north and the south in China’s vast territory, and the diversity of land also means the diversity of pollution. Therefore, there is an urgent need for the technology of biochar and microorganism to improve the soil environment. It is worth discussing how to realize this technology into the market at the present time when the government is eager to achieve energy saving and emission reduction and support the development of green enterprises. This paper will be divided into four main sections on this topic, starting with the current problems faced and the background of the research. The experimental mechanism of the different purification methods for organic and inorganic pollutants is discussed, in which organic pollutants represented by petroleum hydrocarbons and inorganic pollutants represented by heavy metals are analyzed. Soils contaminated by organic or inorganic pollutants are different in terms of purification mechanisms.
Application of Different Stimuli-Responsive Polymeric Micelles for Drug Release
Authors: Zhan Kaibei
Published: January 2023

Achieving controlled release of drugs in disease treatment can greatly improve the utilization rate and therapeutic effect of drugs. Therefore, the development of functional materials with controllable drug release has received more and more attention, such as stimuli-responsive polymeric micelles. The so-called stimuli-responsive polymeric micelles are a new type of polymer micelles that can be used to give responses to different stimulus conditions, such as endogenous stimuli (e.g. light, temperature, ultrasound intensity, magnetic field or electric field) and exogenous stimuli (e.g. redox potential, pH, or enzyme concentration). They can exhibit distinctive size and stability with the variations of the endogenous or exogenous environment. Stimuli-responsive polymeric micelles have several desirable biotechnology applications including their potential use as drug delivery vehicles because tumor tissue and normal tissue is different in physical and chemical properties, where they are very sensitive to endogenous or exogenous environmental changes. This research would mainly discuss different stimuli-responsive polymeric micelles for developing a diverse of drug delivery systems, including light and magnetism response, temperature and ultrasound response, redox response, pH response and enzyme response. Some recent advances and future directions would be briefly referred to as well.
Effects of Adding Probiotics on Food and the Human Body
Authors: Chen Zeming
Published: January 2023

The normal growth and reproduction activities of probiotics have beneficial effects on the human body: regulating the human intestinal flora, promoting digestion and absorption, forming a barrier to protect the intestinal mucosa, reducing blood sugar and cholesterol, enhancing human immunity, scavenging free radicals to delay aging, etc. In addition, the active metabolites secreted by it also play an important role in the human body: decomposing cholesterol to produce acids to inhibit pathogenic bacteria, breaking down fats to produce short-chain fatty acids to promote the self-regulation of gastrointestinal mucosal cells, and metabolizing macromolecular substances (proteins, polysaccharides) to produce nutrients (amino acids, monosaccharides). And it is also widely used in food processing, human health and aquaculture. Probiotics also play an important role in food processing, where can change the pH value of food, extend the shelf life of food, improve the flavor of food, as a substitute for additives and increase the nutritional value of food. Although the traditional concept is that only live probiotics can exert their probiotic effects, more and more studies have shown that some of the probiotic effects of probiotics are closely related to their active metabolites, and some of the active metabolites produced by probiotics can stimulate tissue development and affect the body’s nutritional level and physiological functions. At present, the more studied probiotic active metabolites mainly include extracellular polysaccharides, bacteriocins, organic acids, short-chain fatty acids, vitamins, which has been shown to play an antibacterial, where can prevent and treat diseases, regulate and improve the state of the gastrointestinal tract, promote digestion and absorption and other effects. In this paper, two effects of probiotics on the human body are analyzed, including the effects of growth and reproduction and active secretions on human health, and the research progress of probiotics on dairy products and plant products. In addition, the relevant mechanisms of action are highly summarized. The effect of the clinical effective dose of probiotics on functional foods and improving physical health is elaborated, as well as the influencing factors of probiotic intake on intestinal health, and the recommendations of current international standard regulations on probiotic intake are introduced. Through the analysis of the effect of probiotic intake on human intestinal health, the types, functions and applications of probiotic active metabolites are reviewed, and the current existing problems are proposed, and it is hoped to provide practical reference for the industrialization and R&D application of food processing, health care, livestock breeding and other fields, as well as the formulation of probiotic-related standards and regulations.
Removal of Heavy Metals from Soil Based on Bacteria
Authors: Zhu Yue
Published: January 2023

The use of bacteria to degrade heavy soil metal concentrations and boost plant tolerance to elevated metal levels has significant ecological and financial benefits. Soil contaminated with heavy metals may cause a variety of problems. First, the soil respiration is affected by the heavy metal content because of the way it affects the respiration, metabolism (the metabolic entropy response), and activity of soil microbes. There is less organic carbon converted to bio-carbon and higher microbial metabolic entropy in metal-contaminated soil. Last but not least, heavy metals may be absorbed by seeds, leading to physiological dysfunction and malnutrition in the developing plant. Having an excess of metals in the body might be dangerous. Therefore, the use of bacterial which use various mechanism to degrade heavy metals is the best approach of this paper in getting reed of the heavy metals in soil.
Common Nanocarriers and Their Advantages, Disadvantages and Applications
Authors: Liang Wanjing , Zhong Leyao , Mao Runxian
Published: January 2023

With the improvement of people’s quality of life, skin management and skincare products have become the focus and topics of more and more people’s attention. Among them, the most popular products are anti-aging products. However, the main ingredients in anti-aging products are Antioxidants (AOs), and the irritation and penetrability of the antioxidants might prevent them from being used on the skin directly. With the development of nanotechnology, nanocarriers are created to solve these problems. Herein, liposomes, nanoemulsions, solid lipid nanocarriers (SLNs) and nanostructured lipid carriers (NLCs) are summarized. Besides, relative applications, benefits, and drawbacks are discussed. This review is intended to deepen the understanding of nanocarriers and promote safer applications of nanocarriers in the cosmetic industry.
Representative Inorganic Nanomaterials and Liposomes in Cosmetics
Authors: Xu Yanzhao
Published: January 2023

Nanomaterials are defined as materials ranging from 1nm to 100nm in at least one dimension or with internal nanostructures in bulk materials but showing distinct properties. Since the 20th century, when the feasibility of nanotechnology had been attested, nanomaterials’ applications have radiated to various fields involving electronics, physics, chemistry, processing, biology, and measurement. Moreover, inspired by the physicochemical properties and targeted effects of nanomaterials in therapy and medicine, the anticipated applications in cosmetics are well-developed. Herein, the transparency and enhanced absorption of nano titanium dioxide/zinc oxide, the antibacterial property of nanosilver/nanogold, and the stability, increased penetration, and biocompatibility of liposomes in cosmetics are summarized. Besides, the existing problems such as security assessment, elevatable loading efficiency, and usage are classified. Particularly, the focus is on the mechanism of liposomes, preparation, routes of penetration, and liposome-cell interactions. This article intended better to understand the principles of nanomaterials behind cosmetic applications and get alerted to the inconclusive security.
Application and Prospect of Analysis of Structures Based on Finite Element Method
Authors: Liang Chen
Published: January 2023

The structural requirements of buildings are becoming more stringent and sophisticated as a result of the quick advancement of science and technology. Due to the limitations of the traditional structural mechanical analysis methods, the calculation results often have large deviations from the actual, and therefore cannot simulate the structural forces and displacements in a more realistic way. The emergence of the finite element method (FEM) makes these complex and irregular problems can be solved well. This paper analyzes the specific applications of FEM and its effectiveness on three typical space structures, namely, space trusses, foundation pits, and steel buildings. The results show that in the analysis of large trusses, the three-dimensional nonlinear finite element analysis using relevant analysis software has good accuracy in displacement calculation, seismic simulation, static force analysis, and structural optimization simulation. In the application of foundation pits, this method can also well simulate the force and deformation characteristics of soil under different working conditions. In steel structure, this method can be applied to steel design, steel slip, and steel top plate force analysis. By discussing the finite element method and related software applications, this paper expects to provide ideas for the analysis of some complex problems in the civil engineering industry and to provide some predictions and suggestions for further advancements.
Construction waste recycling and utilization
Authors: Lu Qianxi
Published: January 2023

People's living conditions and the popularization of infrastructure are regarded more and more as China's economy and culture improve. There are also increasing building demands. However, as there are more and more structures, rubbish production increases. There are steps that must be done to deal with the trash produced in building as people's knowledge of environmental friendliness and resource reuse increases and as the impact of construction waste on the entire ecological environment cannot be disregarded. In the past, concrete, asphalt, and other specific types of building debris were the main focus of research and reviews on construction waste and recycling. Despite certain research will consider a wider range of categories, they are not in-depth enough to analyze their essence. This research integrates the classification of building waste and takes its reuse into consideration in comparison to other studies and evaluations. This essay examines recycling of demolition debris and construction debris. Among these, construction debris is split into four categories: excavation of land, road maintenance and destruction of old buildings, buildings, unusual structures. This paper is a more thorough examination of all pollutants connected to the building sector. The recycling of demolition debris is separated into four categories: Housing development, Building roads, Recycled paper, Production of agriculture; Housing development makes up the major chunk of them. With the help of this paper, all construction-related departments should make every effort to eliminate construction pollution at its source. Relevant professionals in the building sector may also recognize how their profession negatively affects society.
Research on Wind-induced Vibration of Long-span Cable-stayed Bridges
Authors: Jin Zhan
Published: January 2023

With the development of mechanical theories and bridge construction technologies, there are increasing number of long-span cable-stayed (LSCS) bridges crossing bays or oceans, which can shorten the distance between two places and facilitate the travel of people. However, with the increase of bridge length, the damping ratio decreases at the same time, making the bridge structure more sensitive to wind-induced vibration (WIV). The vibration can cause safety problems and even the deformation of the bridge. Therefore, it is of great significance to research on the WIV of LSCS bridges. In this paper, common types of WIV of LSCS bridges are firstly introduced from their common definitions and present studies. Then, the mechanical performances under typhoon events and daily average wind conditions are analyzed, respectively. Finally, the solution methods of eliminating WIV of these bridges are discussed, involving strengthening structural stiffness, increasing damping ratio as well as changing the section form of the bridge.
Problems and Advanced Technologies of Green Building Project Management and Materials
Authors: Liang Haoran , Wu Yatong
Published: January 2023

With the growing awareness of climate change, green buildings are beginning to win a place in environmental issues. The pattern of green buildings aims to establish an equilibrium between artificial architecture and the natural surroundings. This study proposes to determine problems and solutions for green building project management and green materials. The outcome of this study reveals that high-cost premium and cognitive limitations on green technologies are the main barriers to the sustainable development of green buildings. To deal with cost-related issues, experts utilize AI-based techniques to reduce energy consumption. Furthermore, in the process of civil engineering construction, construction materials determine the cost, quality, and safety of civil engineering. The main characteristics of green building materials are excellent low energy consumption, low pollution and recycling in the production process and use. The mainstream green materials classification is the four types of basic, energy-saving, recycling and health. Currently, the green materials commonly used in engineering construction mainly include ecological sand-based permeable bricks, green paint and diatom mud ecological wall. Among them, the diatom mud ecological wall is widely used in large cities because it does not cause light pollution. The most significant advantage of green materials in engineering is that they can achieve resource savings. In the selection of green materials in construction, it is necessary to fully consider and make use of the characteristics of green materials.
The evaluation of collapse probability of low-rise buildings based on Monte Carlo simulation
Authors: Hu Beier , Liu Han , Tan Xiaoyu , Zhang Yun
Published: January 2023

Over recent years, wind-caused activities such as typhoons, hurricanes, and tornadoes have happened frequently in coastal areas, causing damage or even the collapse of many buildings. This study designs a three-story teaching building located in Dalian to discuss the influence of different wind speeds on the stability of this building and propose some measurements. This study firstly uses Monte Carlo simulation to analyze the probability of collapse of the beam. Results show that the probability of frame collapse on windy days is 0.399%. It indicates that the wind speed could affect the stability of the structure. Higher wind speed could cause a higher internal force and structure displacement, leading to structural disability. The study also provides some wind-resistant designs to increase structural stability. The first is to choose a wind-resistant location, making reasonable site selection. The second is to select a suitable roof to resist heavy wind, and to increase the safety factor of the roof wind load design. The third is to increase the cross-section reinforcement method to reduce the dynamic wind load effect of the structure effectively. The externally bonded steel from the reinforcement method should be checked to avoid shear damage to the members after the bending bearing capacity increase.
Energy saving and ecological exploration of buildings
Authors: Chen Zijian
Published: January 2023

In the context of increasingly serious environmental problems, construction, the main factor that is unfavorable to the environment, has drawn significant attention. This has allowed green and sustainable buildings to be developed. China is now entering the 21st century and experiencing a stage of rapid development. The construction of urban environments is a key issue because of the complex background and various restrictive factors. Truly green building must be well-regulated from the initial design stages, material procurement, construction and operation. The article summarises and explores the goals, energy conservation, technology, and management involved in green building development.
Structural Design and Seismic Analysis of Connecting Corridor in High-rise Buildings
Authors: Wang Zhiqi
Published: January 2023

With the development of the society, the demand on high-rise buildings has increased remarkblly due to some reasons. Meanwhile, connected corridor structure become a popular design on high-rise buildings which allow different towers to be linked. Due to the complexity of the structure system, it is necessary to indicate the existing issues and the approaches to deal with them or reduce the effect. By reviewing various papers, several conclusions have been drawn. Steel truss is the most efficiency composition of both structure and material in bearing loads, where flexible connection are more likely to be applied with it and has the greatest ability in against the seismic effect.
Information fusion between bridge management system and structure health monitoring system
Authors: Li Xinran , Li Yingxue , Guo Yaqin , Qin Hongyu
Published: January 2023

Through the application status investigation of the bridge management system and the structural healthmonitoring system, it was found that the two systems were not fused well, which resulted in resources waste and inaccurate outcomes. Based on the research of status and application of the two systems, the paper analyzed the necessity and feasibility of the information fusion of the two systems. Finally, the specifie information fusion of the two systems is presented through the exact information fusion of the systems in the bridge structural condition assessment, one of the most important modules of the bridge management system. More accurate results of the condition assessment and remaining life prediction of bridges can be obtained by the bridge management system after the fusion, which will offer some evidence for the bridge maintenance strategy made by bridge management decision- -makers.
Research on Detection and Safety Evaluation System of Huimin Lane Bridge based on BIM
Authors: Li Xinran , Su Shengtao , Li Yingxue , Liu Bohui
Published: January 2023

With the continuous improvement of the national social and economic level the size and quantity of various types of infrastructure in our country have been improved and the community has put forward higher requirements on the level and quality of the construction. In recent years the bridge collapse accidents occur frequently, but our country bridge inspection and safety assessment of the system was established late, our country bridge structure health monitoring system research and application began in the 90. of the 20th century, the implementation of large-scale infrastructure construction projects, bridge health monitoring system also will be rapid development this paper discusses the based on BIM bridge inspection and safety assessment system, and puts forward some practical measures, provides the reference for improving bridge inspection and safety assessment of the system operation level.
Study on effects of highly deviated well on thin interbedded reservoirs fracturing
Authors: Cheng Han , Zhou Zaile , Yun Zhou , Li Zhiwen , Qi Xianyin
Published: January 2023

Highly deviated well is widely applied in thin interbedded reservoirs fracturing in changqing oilfield. the oil production data shows that highly deviated fracturing well can increase the oil production compared with horizontal well fracturing, which suggests that highly deviated well fracturing is more efficient. However, it still needs deeper understanding for the mechanism of highly deviated well increase oil production, to study this problem, True-axial hydraulic fracturing physical simulation test is carried out on two kinds of cement specimen with interlayers, the results show that cement specimen for highly deviated well is more productive because fractures are more likely to cross the interbedded layers and connect oil reservoirs that separated by interlayers. Further research on the mechanism of highly deviated well fracture crossing interbedded layers is conducted via numerical simulation. Cohesive zone model is adopted to simulate the propagation of fracture in highly deviated well and horizontal well to compare the difference of thin interbedded layers stress. the results show that due to the deflection of highly deviated well fracture during propagation, the reservoir mass is divided into two parts, which causes relative displacement of rock mass on both sides of the fracture under the effect of vertical principal stress, thin interlayer eventually got broken under the action of tensile and shear stress. Both laboratory tests and numerical simulation results show that highly deviated wells have stronger interlayer penetration capability, which can improve the fracturing effect of thin interbedded reservoirs.
Peningkatan produktivitas nelayan Kampung Tanggul Indah berbasis pengolahan Value Added Product hasil laut
Authors: Ramli Ramli , Rasidi Moh , Lolita Yona Wahyu , Hasan Ahmad Jainul , Perdana Rivaldi Anwar , Zainurrahman Fahmi
Published: January 2023

Pengolahan hasil laut yang memiliki nilai tambah memerlukan pengetahuan dan keterampilan, namun masyarakat nelayan desa Tanggul Indah belum memiliki pengetahuan dan keterampilan yang memadai untuk mengolah produk bernilai tambah pada hasil lautnya. Tujuan dari kegiatan ini adalah untuk meningkatkan produktivitas masyarakat nelayan di desa Tanggul Indah melalui peningkatan pengetahuan dan keterampilan dalam mengolah hasil laut yang bernilai tambah. Metode yang digunakan adalah model intervensi makro dengan beberapa tahapan antara lain survei pendahuluan, pelaksanaan (inisiasi sosial, analisis prioritas kebutuhan, penyusunan program dan pelaksanaan pengolahan hasil laut yang memiliki nilai tambah) serta monitoring dan evaluasi. Kegiatan ini telah memberikan perubahan pola pikir masyarakat nelayan di Tanggul Indah mengenai pentingnya memanfaatkan hasil laut menjadi produk yang bernilai tambah, khususnya hasil laut yang menjadi limbah sebagai upaya peningkatan pendapatan dan keluar dari kemiskinan
Pelatihan menggulung ulang kumparan motor listrik Alternating Current 1 phasa di Kelurahan Jati Makmur Kecamatan Binjai Utara
Authors: Usman Usman , Dwiyanto Dwiyanto , Panjaitan Albert , Amren Hairul , Sihombing Panangian Mahadi
Published: January 2023

Berdasarkan data Badan Pusat Statistik (BPS) Kota Binjai 2022, jumlah penduduk berusia 5 – 24 tahun Kelurahan Jati Makmur Kecamatan Binjai Utara sebanyak 3.634 jiwa dengan perbandingan jumlah laki-laki dan perempuan hampir 1:1. Selain itu, berdasarkan tingkat pendidikan telah diketahui juga persentasi penduduk berusia 7 – 24 tahun, yaitu SD/sederajat 33,61%, SMP/sederajat 12,74%, SMA/ke atas 23,04%, dan tidak bersekolah lagi 30,61%. Berdasarkan data tersebut, Tim Program Kemitraan Masyarakat (PKM) Politeknik Penerbangan Medan berempati untuk melaksanakan pelatihan di Kelurahan Jati Makmur. Pelatihan tersebut bertujuan untuk membekali/ meningkatkan keahlian yang bersifat teknik khususnya bagi penduduk yang tidak bersekolah lagi. Sehingga diharapkan dapat meningkatkan taraf hidup penduduk di kelurahan tersebut. Tim PKM telah melaksanakan pelatihan menggulung ulang kumparan motor listrik alternating current (AC) 1 phasa selama 3 hari di Kelurahan Jati Makmur. Jenis pelatihan tersebut dipilih karena berdasarkan data BPS Kota Binjai 2022, sumber air minum penduduk Kelurahan Jati Makmur adalah air isi ulang atau air sumur bor (pompa). Sehingga penggunaan motor listrik AC 1 phasa sebagai penggerak pompa sangat sering digunakan. Tahapan pelatihan diawali dengan pengenalan aplikasi, prinsip kerja, dan bagian-bagian motor listrik. Tahapan selanjutnya adalah praktek membongkar, menggulung ulang kumparan, dan memasang kembali motor listrik.  Terdapat 3 metode pendekatan yang digunakan pada pelatihan ini, yaitu metode ceramah, peragaan, dan praktek. Evaluasi hasil pelatihan dilakukan dengan memberikan pre-test dan post-test kepada setiap peserta. Berdasarkan hasil test tersebut diperoleh peningkatan pemahaman peserta pelatihan terkait menggulung ulang kumparan motor listrik, yaitu dari nilai rata-rata 45 (pre-test) menjadi 90 (post-test)
Pemanfaatan tongkol jagung sebagai pakan ternak Koptan Rudang Mayang Desa Balai Kasih
Authors: Hasrizart Iwan , Nasution Asmara Sari , Ginting Natael , Kartika Kartika , Juliana Juliana
Published: January 2023

Masyarakat yang tergabung dalam kelompok tani/ternak Rudang Mayang Desa Balai Kasih Kecamatan Kuala Kabupaten Langkat Propinsi Sumatera Utara memiliki penghasilan yang bersumber dari pertanian dan pertenakan. Tanaman jagung dibudidayakan secara kontinyu, begitu juga ternak lembu. Pokok permasalahan adalah pakan rumput semakin langka. Hal ini disebabkan oleh pengunaan festisida, perubahan iklim yang ekstrim,  sehingga kurangnya rumput sebagai pakan. Tujuan dari pengabdian kepada masyarakat adalah untuk memberikan penyuluhan dan pelatihan pembuatan pembuatan pakan ternak dari tongkol jagung. Metode yang digunakan adalah penyuluhan dan praktek pembuatan tongkol jagung sebagai pakan ternak. Hasil dan pembahasan masyakat mengerti dan faham cara pembuatan pakan ternak dari bahan tongkol jagung sebagai pakan ternak berkualitas tinggi serta mutu gizi tinggi.  Kesimpulan dengan menggunakan pakan ternak buatan ini lembu mereka lebih gemuk dan lebih sehat.
Optimization and sensitivity analysis of high frequency pulse tube cryocooler for aerospace application
Authors: Chakala Damu , Moudghalya Sumukh , Nerale Mrunal , Prasad Rajendra , Behera Upendra , Reddy Sathyanarayana
Published: January 2023

The demand for cryogenic cooling systems has been on the rise ever since the development of long-range infrared imaging systems, especially high-frequency stirling-type cryocoolers which have a vast array of applications in the aerospace sector. While there have been many studies reporting analysis of the pulse tube cryocoolers, these lack an optimization approach with a further sensitivity analysis from computational fluid dynamic (CFD) data to obtain better cold end temperatures. Presently, a response surface method (RSM), has been utilized to characterize the influence of the affecting parameters and a global sensitivity analysis has been conducted to put forward the critical parameters that influence the performance of the device. It is observed that an increase in frequency for lower pressure ratios with higher mean pressure results in better cooling performance in smaller pulse tube diameter models. The sensitivity analysis indicates the operating parameters such as frequency and pressure ratios to be more influential than the geometric parameters with an impact of over 80%.
The possibility of aquatic weeds serving as a source of feedstock for bioethanol production: a review
Authors: Phuong Thi Vu  , Rameshprabu Ramaraj  , Prakash Bhuyar  , Unpaprom Yuwalee
Published: January 2023

Anaerobic digestion is recognized as an attractive option for the effective management and treatment of lignocellulosic biomass as well as waste recovery of resources for bioethanol production. Long enough testing has been done on bioethanol production using lignocellulosic biomass. This helps to reduce stress and global energy problems. Global wide has a variety of environmental impacts due to its use of fossil fuels. Bioethanol might be produced in Asian locations from many types of biomasses, including agricultural waste, forest waste, and wood biomass. This would be an environmentally friendly process. Unfortunately, there is very little research into the production of ethanol from rice field weeds. This makes it difficult to develop bioethanol production. This review is aimed at developing bioethanol production and the trend towards organic products that began nowadays. Unwanted weed growth is a major problem in rice cultivation. This review demonstrated the waste-to-energy aspect of the bioethanol production process using two weeds, gooseweed (Sphenoclea Zeylanica), and small-flowered nutsedge (Cyperus difformis).
Bioethanol production from low-grade konjac powder via combination of alkaline and thermal pretreatments
Authors: Warichsa Kongchan  , Yuwalee Unpaprom  , Natthawud Dussadee  , Ramaraj Rameshprabu
Published: January 2023

Combining alkaline and thermal pretreatments for the conversion of low-grade konjac powder to fermentable sugars was studied. After pretreatment, an enzyme hydrolysis procedure was applied with cellulase. The pretreatment and hydrolyzed liquids were used with Saccharomyces cerevisiae for the fermentation process in the batch system.  Analysis with a spectrometer revealed that the fundamental matter of low-quality konjac powder was severely degraded in order to enhance the fermentable sugars. Our investigation found that the alkaline combination thermal pretreatment produced the most reducing sugars. The impacts of several operational factors were examined. The highest alcohol content (3.551g/L), heating value (3570.27Cal/g) and energy values (17.15 MJ/kg) were achieved, this might be a very promising method of low-grade konjac powder use. Pretreatment of low-grade konjac powder for bioethanol production is highly advised due to its extremely low cost and high yield of reducing sugars and bioethanol.
Casuística das intoxicações por inibidores das colinesterases pelo Centro de Informação e Assistência Toxicológica do Paraná (CIATox/PR) entre 2015 e 2019
Authors: Purim Kátia Sheylla Malta , Siqueira Daniel Emilio Dalledone , Mello Diego Picussa de Campos , Antunes da Silva Bruno , Carvalho Letycia Amando de , Savi Maria Fernanda , Piasera Maria Júlia Franco
Published: January 2023

Esta pesquisa buscou analisar os casos de intoxicações por organofosforados e carbamatos, presentes em agrotóxicos e pesticidas, registrados na base de dados do Centro de Informação e Assistência Toxicológica do Paraná (CIATox/PR). Trata-se de estudo retrospectivo em que foram avaliadas variáveis sociodemográficas e clínicas relacionadas à intoxicação, à forma de exposição, à causa e ao desfecho. Para a análise estatística foram utilizados testes de Kolmogorov-Smirnov, Shapiro-Wilk, Qui-Quadrado e Teste Exato de Fisher, considerando p<0,05. A amostra foi composta por 426 casos, sendo 218 (51,2%) mulheres. O principal agente foi raticida clandestino em 278 (65,2%) pacientes. A principal circunstância das intoxicações foi tentativa de suicídio com 293 (68,8%) casos. Houve predominância de exposição via oral (89,9%) e zona urbana em 349 (81,9%) casos, a maioria considerados leves (52,6%) e assistidos em serviços médicos (66,4%). Cerca de 327 (76,8%) indivíduos apresentavam manifestações clínicas. O tempo decorrido entre a exposição e o contato com o CIATox/PR foi maior nos casos considerados graves (p= 0,041). A atropina foi utilizada em 94 (49%) pacientes intoxicados por carbamatos, em 31 (33,3%) por organofosforados e em 84 (59,6%) por outros inibidores da colinesterase não especificados. Duas mulheres e um adolescente apresentaram desfecho fatal, tendo em comum a ingesta intencional de “chumbinho”. A casuística predominante nesta série histórica foi paciente do sexo feminino, faixa etária adulta, residente na região metropolitana, exposta a agrotóxico por via oral, sintomática, classificada como gravidade leve, sem necessidade de atropina, contudo ocorreram três casos com desfecho para o óbito.
Desenvolvimento motor de escolares de uma cidade da região do Vale do Rio dos Sinos, Rio Grande do Sul, Brasil
Authors: Selbach Rafael da Silva , Berlese Denise Bolzan , Schaab Diego Matheus , Sanfelice Gustavo Roese
Published: January 2023

O presente estudo, descritivo, de caráter quantitativo, transversal, buscou avaliar e comparar o desenvolvimento motor de escolares de 8 a 10 anos de idade, da cidade de Novo Hamburgo, estado do Rio Grande do Sul, Brasil. Participaram do estudo 145 escolares (80 meninos e 65 meninas) matriculados na rede municipal de ensino, pertencentes a diferentes escolas e regiões do mesmo município. Como instrumento, foi utilizado o Test of Gross Motor Development - Second Edition (TGMD-2). A análise dos dados foi realizada por meio de estatística descritiva, verificando-se médias, medidas de dispersão, frequência e percentual. Para a comparação dos dados, utilizou-se o teste t de Student e Qui-quadrado, assumindo significância quando p ≤ 0,05. Os resultados evidenciaram que, quando comparados por sexo, os escolares não apresentaram diferença estatística significativa. Quando comparados por idade, os investigados apresentaram, em sua maioria, desenvolvimento motor muito pobre, sem diferença estatística significativa. Contudo, quando comparados por escolas, evidenciou-se que as classificações do desenvolvimento motor dos escolares foram pobres e muito pobres com diferenças estatísticas significativas
Fatores associados ao conhecimento da dengue no município de Parauapebas, Pará
Authors: Reis Cássio Pinho dos , Velloso Leônidas Pompeu Leão , Silva Eidy Regina Oliveira da , Sousa Eliana Martins de , Sousa Leticia Graziele da Silva de Oliveira , Santos Elvis Vieira dos
Published: January 2023

A dengue é uma das arboviroses de maior incidência no Brasil e no mundo. Compreender como ela se associa a diversos fatores é de suma importância para tentar diminuir sua incidência. Dessa forma, este estudo foi realizado no ano de 2018 em bairros, tanto da zona urbana quanto da zona rural, do município de Parauapebas, no estado do Pará, com o objetivo de gerar um modelo probabilístico para descrever a probabilidade de uma pessoa do município de Parauapebas conhecer como os patógenos da doença podem ser transmitidos e sobre os sintomas da doença. Foram utilizadas técnicas estatísticas de análise exploratória de dados para descrever as variáveis utilizadas no modelo e a regressão logística múltipla, onde, de acordo com os dados obtidos, na cidade de Parauapebas, que as mulheres têm mais de duas vezes mais chance de saber os principais sintomas da doença do que uma pessoa do sexo masculino. Constatou-se ainda que uma grande parcela da população de Parauapebas não sabe como é a forma de transmissão da dengue.