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Functional Sulfate Electrolytes Enable The Enhanced Cycling Stability Of Nati2(Po4)3/C Anode Material For Aqueous Sodium-Ion Batteries, Shu-Jin Li, Zhi-Kang Cao, Wen-Kai Wang, Xiao-Han Zhang, Xing-De Xiang

Journal of Electrochemistry

Aqueous sodium-ion batteries show promising application in fields of large-scale storage of intermittent renewable energies owing to the earth-abundant sodium resources and incombustible aqueous electrolytes. Primary factors determining whether they can be commercially utilized are low cost and long lifetime. Among current electrode materials, NASICON-type NaTi₂(PO₄)₃ arouses wide interests as an anode material for aqueous sodium-ion batteries as it offers a high specific capacity, fast Na-transport ability and reasonable working potential, however, suffering from insufficient cycling performance caused by severe dissolution of active materials in traditional aqueous electrolytes. In this work, a functional sulfate electrolyte …

Nitrogen-Sulfur Co-Doped Porous Carbon Preparation And Its Application In Lithium-Sulfur Batteries, Gui-Xiang Zhao, Wail Hafiz Zaki Ahmed, Fu-Liang Zhu

Journal of Electrochemistry

In recent years, lithium-sulfur (Li-S) batteries have been considered as a promising candidate for the next generation of energy storage system due to their ultrahigh theoretical capacity (1675 mAh·g^-1) and energy density (2600 Wh·kg^-1). However, the practical application of Li-S batteries is seriously limited by their insulating nature of sulfur, the shuttle effect of polysulfides (LiPSs), and volume expansion during charging and discharging. To overcome those disadvantages, one of the commonly methods is to infiltrate sulfur into porous conductive carbon framework, such as porous carbon, hollow carbon spheres, graphene, carbon nanotubes and some composites of the …

Structure Analysis Of Pemfc Cathode Catalyst Layer, Rui-Qing Wang, Sheng Sui

Journal of Electrochemistry

The sluggish oxygen reduction reaction (ORR) on the cathode of the proton exchange membrane fuel cell (PEMFC) has always been one of the key factors limiting its commercialization. The optimization of the cathode catalytic layer structure plays an important role in improving fuel cell performance and reducing production costs. In this paper, two different catalysts (platinum nanoparticles (Pt-NPs) and platinum nanowires (Pt-NWs)) were prepared by using catalyst coated substrate (CCS) method. By constructing a double-layer catalytic layer structure, we analyzed the effect of different catalytic layer structures by performing a single cell test. The results showed that the dense platinum …

Formation And Morphological Evolution Of Nanoporous Anodized Iron Oxide Films, Jin-Wei Cao, Nan Gao, Zhao-Qing Gao, Chen Wang, Sheng-Yan Shang, Yun-Peng Wang, Hai-Tao Ma

Journal of Electrochemistry

The preparation of iron oxide films with nanoporous structure by anodization has attracted much attention for its potential applications. However, the formation mechanism of porous structure during anodization is still unclear. In this paper, the composition of anodic current during the formation of nanoporous anodized iron oxide film was analyzed in combination with the current density-potential response (I-V curve) and the derivation of Faraday’s law. The results showed that the anodic current consisted of an ionic current (leading to the migration of ions to form oxide) and an electronic current (leading to the oxygen evolution), and the …

The Sonora Substellar Atmosphere Models. Ii. Cholla: A Grid Of Cloud-Free, Solar Metallicity Models In Chemical Disequilibrium For The Jwst Era, Theodora Karalidi, Mark Marley, Jonathan J. Fortney, Caroline Morley, Didier Saumon, Roxana Lupu, Channon Visscher, Richard Freedman

Faculty Work Comprehensive List

Exoplanet and brown dwarf atmospheres commonly show signs of disequilibrium chemistry. In the James Webb Space Telescope (JWST) era, high-resolution spectra of directly imaged exoplanets will allow the characterization of their atmospheres in more detail, and allow systematic tests for the presence of chemical species that deviate from thermochemical equilibrium in these atmospheres. Constraining the presence of disequilibrium chemistry in these atmospheres as a function of parameters such as their effective temperature and surface gravity will allow us to place better constraints on the physics governing these atmospheres. This paper is part of a series of works presenting the Sonora …

Concurrent Achilles Tendon Vibration And Tibial Nerve Stimulation To Estimate Persistent Inward Current Strength In Motoneurons, Denis César Leite Vieira, Amilton Vieira, Matheus Avelino Dos Santos, Rafael Rodrigues Da Cunha, Victor Lage, Anthony J. Blazevich, Martim Bottaro

Research outputs 2014 to 2021

Vibratory (Tvib) and sustained (Tsust) torque responses to concurrent Achilles tendon vibration and neuromuscular electrical stimulation applied over the muscle belly (vib+stim) are used as indicators of motoneuron facilitation and, theoretically, persistent inward current strength. However, neuromuscular electrical stimulation (NMES) applied to the nerve trunk may potentiate motoneuronal excitability more than muscle belly NMES, yet it remains unclear whether NMES applied over the nerve evokes robust Tvib and Tsust responses when used during the vib+stim protocol. This study tested whether a nerve-targeted vib+stim protocol elicits Tvib and Tsust responses in the ankle plantar flexors with acceptable intra- and inter-session reliability. …

The Future For Savanna And Tropical Grasslands: A Latin American Perspective, R. R. Vera

IGC Proceedings (1977-2023)

The objective of the paper is to briefly review the main trends in the tropical lowlands of Latin America and the Caribbean (LAC) with particular emphasis in the neotropical savannas. These tropical native grasslands cover occupy approximately 210 million hectares, and constitute major portions of the territory of Bolivia, Brazil, Colombia, Guyana and Venezuela. Many analysts consider that intensification of their use is a valid alternative to the expansion of the livestock and crop industries into the rainforest.

The evidence reviewed shows that since the late 1980s, the LAC agricultural sector has shown dynamism not seen for many years. Despite …

Ecophysiology And Management Response Of The Subtropical Grasslands Of Southern South America, E. J. Berretta

IGC Proceedings (1977-2023)

The subtropical grasslands of Southern South America (campos) are located approximately in the range of 24° S to 37° S latitude. These grasslands are dominated by C₃ and C₄ grasses, and in a lesser extent to herbaceous plants, shrubs and dispersed trees, with some exceptions in particular regions. Previous to the introduction of large herbivores, at the beginning of the XVII century, like cattle and horses, shrubs and tall grasses dominated the vegetation. Then, associated with greater grazing pressure and partially due to fire, the original campos are maintained, actually in a pseudo-climax herbaceous phase. These native communities …

Herbaceous Vegetation Dynamic After Cut And Burn Shrub Plants In Southern Brazil, A. M. Girardi-Deiro, M. L. Porto, J. Riboldi

IGC Proceedings (1977-2023)

A savanna area at "Serra do Sudeste" in southern Brazil, was studied during four years to evaluate the influence of cutting and burning shrub plants on dynamic of herbaceous vegetation. The cover of each species in 44 permanent quadrats (0,25 m²) and in each area (cut and burned) was evaluated. The results suggested that grasses and legumes were favored by cutting shrub plants. Burning favored forbs in the first years after disturbance and retarded the development of native forage species desirable for grazing.

Talent Management Strategies And Their Role In Creating Competitive Advantage At Palestinian Universities, Alaedin K. Alsayed, Firas Al-Jadi

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

The study aimed at uncovering the relationship between talent management strategies and the competitive advantage together with revealing the extent to which these strategies affected the process of creating the competitive advantage at the Palestinian universities. The study followed the descriptive analytical approach, which used the questionnaire as a tool for data gathering. The population of the study included all the 206 employees in the supervising positions of both the administrative and academic staff in the largest Palestinian universities in the Gaza Strip, the sample of which was 166. The study concluded that there was a relationship between all the …

The Reality Of Vocational Maturity Among Talented And Normal Students In Ajloun Governorate, And Its Relationship With Some Variables, And The Academic Achievement, Faisal Al-Nawasra

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

The study aimed to investigate the reality of vocational maturity among a sample of talented and normal students at the schools of Ajloun Governorate, Jordan, and its relationship with some demographic variables (gender, grade, educational level of the parents) and academic achievement. To achieve the study objectives, the researcher used the vocational maturity test developed by Krits, and translated into Arabic by Alsafasfeh (1993). The validity and reliability of the test were acceptable. The sample consisted of 291 students, 96 of whom were talented students, and 195 were normal students. It was a stratified random sample selected from the high …

Factors Influencing The Decision Of Granting Credit At Commercial Banks In Jenin Governorate, Zakaria Al-Jamal

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

Banks perform many activities and functions and the most important function is the credit granted to current or prospective clients. This function will be profitable if it is managed by the credit department properly in terms of several factors .The decision of granting credit in banks is usually complicated and difficult, perhaps because the results of the credit decision only appear after a relatively long period of time. Therefore, understanding the determinants of credit risk plays a crucial role in the financial stability of the banks and decision of granting credit. The study aimed to identify the factors influencing …

Mental Health And Its Relationship With The Psychological Resilience Of University Students During Corona Virus (Covid-19) Pandemic In Northwestern Syria, Dr. Iman Sarmini

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

This study sought to reveal the prevalence of mental disorders during the Corona virus' pandemic and its relationship with psychological resilience among university students in Northwestern Syria. To achieve this, Middlesex Hospital Questionnaire by Sidney Crawn & Crispy 1970 and the measure of psychological resilience developed by the researcher, were applied to a sample of 228 (158 males and 70 females) students from Al-Sham International University and the International University of Science and Renaissance. The results showed that mental illness is 36.7% prevalent among university students. More specifically, obsessive-compulsive disorder was regarded as one of the most common disorders, reaching …

The Role Of The Palestinian Community Reconciliation Committee As A Model For Transitional Justice In Achieving National Reconciliation, Issam Husni Alatrash

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

The aim of this study was identifying the role of the Palestinian Community Reconciliation Committee as a model for transitional justice in achieving the national reconciliation. This study focused on achieving this goal through three axes: the obstacles encountering the Community Reconciliation Committee, the mechanisms of the Community Reconciliation Committee and support and enhancements of the Community Reconciliation Committee. The researcher used the analytical descriptive approach describing the phenomenon of the study in addition to conducting a field study to identify the role of the Community Reconciliation Committee in achieving the national reconciliation by designing a questionnaire and taking the …

The Extent To Which The Exchange Rate Is Affected By The Exports And Imports Fluctuations "A Standard Study Of The Case Of Algeria During The Period Of (1988-2017)", Ghiat Cherif, Messaadia Djamel

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

This study aimed to identify the exchange rate and highlight the reality of the Algerian exports and imports and the fluctuations that occurred during the period of (1988-2017). The effects were also addressed in an effort to investigate the extent to which the exchange rate of the Algerian dinar was affected when compared to the dollar. This effect was mainly attributed to the fluctuation of foreign trade. To achieve this purpose, the researcher formulated and used a standard form in (ARDL) format due to the small size of the study sample, which contained two variables, namely exports and imports. This …

Reconstruction And Rebuilding Stability Of Post Conflict Societies: Economic And Security Interests Or Sustainable Development?, Jihad Al-Ayasa

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

This critical review shed light on the problem of applying the model of reconstruction and stability building of Germany and Japan after World War II on geopolitically and culturally different cases, such as Iraq and Afghanistan as post war contexts; and probably the same model will be applied to different post war contexts, such as Syria, Yemen, Libya and others. The study discussed the reasons why the model of reconstructing Iraq and Afghanistan failed compared to the successful model that was applied in Germany and Japan. Grounding on previous literature and theoretical frameworks, the study developed a new model that …

The Predictability Of Positive Thinking Of The Gifted Students’ Psychological Well-Being Level, Majed Aldalham, Dr.K.Hammuri Abudallah Hammuri

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

The current study aimed to identify the predictability of the positive thinking of the level of psychological well-being among gifted and talented students. This study consisted of (170) students, who were identified as gifted students and integrated into secondary schools in Abha city, Saudi Arabia. The descriptive and correlational method was applied. The Positive Thinking scale (developed by the researchers) and the Rosemary Psychological Well-being scale (translated and prepared by the researchers) were applied to the study sample. The results indicated that the levels of both positive thinking and psychological well-being were high among gifted students in Abha city. There …

Strategies To Maintain Fuel Security In Palestine, Suhaila Abu Ghoush, Ahmad Sadaqa

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

Fuel plays a key role in many aspects of life, particularly in any country’s national security. However, energy insecurity leads to economic and political instability. In this study, the researcher investigated the strategies used to maintain fuel security in Palestine in order to define the challenges facing Palestine’s fuel security, while exploring geopolitical variables and their impacts, investigate the territory’s fuel storage policies and find out the potentiality to build fuel security infrastructure. To achieve those purposes, the researcher used a combination of descriptive and comparative approaches. More specifically, the researcher compared the Palestinian circumstances with the circumstances of other …

Prediction Of Body Fat Percentage Based On Anthropometric Measurements Using Data Mining Approach, Hamsa Amro, Prof. Mohammed Awad

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

In recent years, heart disease, diabetes, and some types of cancers have been reported as some main causes of death in most countries of the world, and obesity, which is often attributed to excess body fat, is one of the most common risk factors for these diseases. To make the vast amounts of data produced by health care information systems useful to the potential, the researchers applied knowledge discovery through predictive modeling. This study used anthropometric measurements as input data to different data mining techniques to predict body fat percentage. Fisher’s Method of Scoring was used to select the most …

Deforestation For Pasture Development – Has It Been Worth It?, W. H. Burrows

IGC Proceedings (1977-2023)

Differing scenarios leading to deforestation for pasture development in savanna (woodland) and closed forest communities in the tropics – sub-tropics are compared and contrasted. Australian and Brazilian examples are highlighted. No simple answer is given to the question of whether deforestation for pasture development has been worth it, since both commercial and non-commercial values have equal validity and need to be taken into account. These issues are addressed in the context of land assigned by governments for agricultural purposes. It is concluded that technology and ecological understanding are now available to maintain sustainable production from converted forest systems. However emphasis …

Maintaining A Stable Body Balance During Rotational Movements And Its Influence On The Indicators Of The Throwing Workability Of Wrestlers, Bakhrom Bakhtiyorovich Odilov

Eurasian Journal of Sport Science

Purpose: The purpose of this research is to study the influence of vestibulosomatic stability on the efficiency of throwing workability of belt wrestlers, when they perform techniques on the right and on the left.

Methods: The studies used pedagogical tests specially developed and approved by the Belt Wrestling Federation of Uzbekistan. The research was conducted in September 2017 and June 2018 and involved qualified belt wrestlers-students in the weight categories of 61-66 and 67-73 kg, the number of which was distributed to 15 people in each weight category.

Results: Actual level of volume and intensity of dummy throws over the …

Mathematical Model Of The Efficiency Of Investments Aimed In The Implementation Of Water-Saving Technologies

Irrigation and Melioration

In Uzbekistan, research work is being carried out aimed at improving the economic mechanisms for the introduction of water-saving technologies for irrigating agricultural crops. At the same time, the issues related to the analysis of the effectiveness of the use of water-saving technologies when irrigating cotton, the development of mathematical methods for assessing the effectiveness of investments, as well as their introduction into practice have not been sufficiently studied. This article provides a mathematical model of the efficiency of investments aimed at introducing water-saving technologies. The results of a numerical experiment of a mathematical model show that the introduction of …

Efficient Use Of Water Resources In The Basins Of Small Rivers, F. Gapparov, M.F. Gafforova

Irrigation and Melioration

The article provides a recommendation for the efficient use of water resources in the basins of small foothill rivers. The research was carried out on the example of the Govasay river basin located in the northern part of the Fergana Valley. The efficiency factor of the canal has been determined and a technical assessment has been given for the management of water resources in the river basin; the efficiency of the canal is 65-75%. A program for the operational management of water resources in The Govasay river basin and a GIS map of water consumers in the Govasay river basin …

Model Of Groundwater Level Control Using Horizontal Drainage, A. Arifjanov, M. Otaxonov, Z. Abdulkhaev

Irrigation and Melioration

The article describes the main factors affecting the rise in the level of groundwater in the city of Fergana and ways to eliminate them. Currently, in order to reduce the negative impact of rising groundwater levels on the environment, crops, buildings and structures, as well as underground utilities, it is proposed to design horizontal drainage in urban areas and a mathematical model has been developed for changing the groundwater level. For this, long-term data from observation wells were analyzed and the hydraulic parameters of horizontal drainage were selected taking into account the hydrogeology of the area. Taking into account the …

Hydraulic Calculation Of A Resource-Saving Jet Water Lift, D Abduraimova, M. Atakhanov, S. Melikuziyev, D. Bakhromova

Irrigation and Melioration

The article discusses an improvement method based on the laws of flow in the development of resource-saving devices on the basis of an analytical analysis of research on the use of jet water lifters in the national economy. The hydraulic parameters of the jet water elevator are theoretically substantiated, the dependences obtained are experimentally verified. On the basis of the experiments carried out, the economic parameters of the jet water lift were determined. The laboratory jet water lifting device is intended for pumping water from a well from a depth of 1 m to a height of 2 m. The …

Results Of Proximate Analysis Of Energy Use Of Municipal Solid Waste, N.N. Abduganiev

Irrigation and Melioration

In the modern industrialized world, various raw materials are processed and used for human consumption. While some of the raw materials are converted into the desired product, the rest is thrown into the environment as waste. It is known that solid waste is a type of biomass that is formed in the course of human life. The article presents the results of a preliminary analysis of studies on the use of solid waste energy in the Urta-Chirchik district of the Tashkent region. Sorting results showed that the total volume of municipal solid waste in the district consists mainly of wood …

Shredding Of Cotton Stalks Under The Action Of Toothpicks In A Combined Unit, B. Khudayarov, U. Kuziev, B. Sarimsakov, М. Kholbutaev

Irrigation and Melioration

The article presents materials devoted to the justification of the parameters of the crown-wheel of the combined aggreagate. The technological process of work and the design of the working part, which is crushed by crushing cotton stalks, without breaking them, laying them on the movement of the unit, has been substantiated and developed. The optimal parameters of the crown-wheel and the tooth are determined by solving the regression equations that determine the optimal values of the vertical load on the teeth and its working quality. The results of theoretical and experimental research show that the amount of crushing of cotton …

Influence Of Electrophysical Methods On The Processes Of Root Formation Of Grapes, N.M. Markayev

Irrigation and Melioration

The article describes the possibilities of electrophysical processing before planting cuttings during vegetative cultivation of grape seedlings. The processes of root formation in cuttings using the electrophysical method in the article Acceleration of the process of root formation in cuttings of black raisins, treated at 71 V/m and an electric field strength of 15 hours, and an increase in the viability, quality, growth and survival of rooted seedlings up to 16.67-34% Presented the results of experiments on the increase and methods of electrotechnological processing of grape cuttings. The result of the study is the analysis and results of the processes …

Conditions, Criteria And Principles For Creating An Agri-Cultural Land Market In Uzbekistan, A.R. Nurnazarov

Irrigation and Melioration

The article analyzes the prerequisites for creating a market for agricultural land in the Republic of Uzbekistan, special attention is paid to land reform, land degradation (reduction of the bonitet score from 60 in 1991 to 50 or more at present, pasture degradation by 20-30%) and increase in economic from their use, the role of land rent in payments for land. 6 basic principles for creating a land market have been established and systematized, the relationship between X-rays and water in the irrigated farming zone, the role of the market in increasing the efficiency and effectiveness of the use of …

Economic Assessment Of The Effect Of Family Income On Students' Disciplines, Sh.A. Muratov

Irrigation and Melioration

The importance of higher education in scientific research, its role in poverty reduction and population growth has been studied theoretically. Also, when using the data of social surveys conducted by 538 respondents (students) studying in higher education institutions, they were awarded the Order of the logistics regulator in the economic assessment of the factors influencing the rate of mastery of disciplines. Factors influencing the acquisition of subjects by students: the main income of the family comes from non-farm (69,9 %), sex (52,2 %), studying at a higher education institution on a state grant (108,8 %), the student's course of study …