Digital Commons Network^™

Factors Affecting The Attitude Accuracy Of Wireless Electromagnetic Wave Mwd System, Wang Xiaobo

Coal Geology & Exploration

In broken soft coal seams of coal mine where hydraulic driving directional drilling is used, hole collapse and hole wall instability are easy to occur. Electromagnetic wave measurement while drilling system is suitable for gas driving drilling, so it is widely used in broken soft coal seams. The accuracy of drilling trajectory is the key to gas drainage effect in broken soft coal seams. In the use of electromagnetic wave measurement while drilling system, the phenomenon of insufficient accuracy and large error of trajectory measurement appears irregularly. In order to solve this problem, this paper analyzes all the factors that …

Mechanism And Effect Analysis Of Enhanced Gas Drainage With Large Diameter Double Boreholes, Zhang Chunhua, Zhang Zijian, Nian Jun, Jiao Dengming

Coal Geology & Exploration

To study the mechanism of enhanced gas drainage with large diameter double boreholes, numerical models of single holes with different diameters and double ø350 mm holes were established by using the RFPA^2D-Gas software in working face 30110 of Shiquan Coal Mine, Shanxi Province. Stress distribution, damage and fracture, gas permeability evolution and gas migration law of the coal around the hole were analyzed, and then the extraction effect of double ø350 mm holes was investigated. Simulation results show that the pressure relief radii of the ø100 mm, ø250 mm, ø350 mm and double ø350 mm holes are 0.25 …

The Impact Of Virtual Interviews On The Geographic Distribution Of Ophthalmology Match Results In The 2020–2021 Cycle, Chandruganesh Rasendran, Sarah Rahman, Uthman Younis, Raoul Wadhwa, Manasvee Kapadia, Jonathan H. Lass, Linda H. Ohsie-Bajor

Journal of Academic Ophthalmology

Abstract

Background Instead of the traditional in-person interviews, the 2020 to 2021 ophthalmology application cycle was conducted with virtual interviews due to coronavirus disease 2019 (COVID-2019). Little is known about differences between the results of this application cycle with previous years.

Objectives The aim of this study was to determine the effect of virtual interviews on the geographic distribution of matched ophthalmology residency applicants.

Methods Information was collected on the medical school location and matched residency program location for 2020 to 2021 applicants as well as applicants during the 2016 to 2017, 2017 to 2018, and 2018 to 2019 cycles …

A Retrospective Study Of Disparities In An Academic Ophthalmic Emergency Department, Colleen Szypko, Nathan Hall, Thong Ta, Matthew F. Gardiner, Alice C. Lorch

Journal of Academic Ophthalmology

Abstract

Purpose Emergency medicine is a common access point to health care; disparities in this care by demographic characteristics, including race and ethnicity, may affect outcomes. The Massachusetts Eye and Ear (MEE) Emergency Department (ED) is a subspecialty emergency department; data from this site can be utilized to better understand social determinants of quality ophthalmic care.

Design This is a retrospective cross sectional cohort study in the MEE ED examining patient visits from June 1, 2016 to June 30, 2019.

Methods Using the electronic medical record system, all unique visits were identified between June 1, 2016 and June 30, 2019 …

Comparison Between Medical Student Educators And Program Directors In 2010 And 2019, Prithvi S. Sankar, Joann A. Giaconi, Anju Goyal, Emily G. Graubart, Pavlina S. Kemp, Daniel W. Knoch, Jamie B. Rosenberg

Journal of Academic Ophthalmology

Abstract

Objective Over the last decade, prominence of the Directors of Medical Student Education in Ophthalmology (DMSEs) within the Association of University Professors of Ophthalmology (AUPO) has increased. With increased recognition of this important leadership position, an examination of the trending demographic differences between DMSEs and the Ophthalmology Program Directors (PDs) may be helpful, especially in regard to the potential for academic promotion from each track.

Design Present study is a database study.

Methods The AUPO directory was used to ascertain the DMSE and the PD members between 2010 and 2019. The demographic profile for each member was determined using …

Smartphone Compatible Versus Conventional Ophthalmoscope: A Randomized Crossover Educational Trial, Rachel Curtis, Mark Xu, Daisy Liu, Jason Kwok, Wilma Hopman, Isabella Irrcher, Stephanie Baxter

Journal of Academic Ophthalmology

Abstract

Objective The aim of the study is to compare performance and ease-of-use (EOU) of optic disk assessment using a smartphone direct ophthalmoscope attachment (D-EYE) to the gold standard direct ophthalmoscope (DO).

Design The type of study involved is prospective, randomized, crossover, and educational trial.

Participants The participants involved were first year medical students inexperienced in ophthalmoscopy.

Methods Optic disks of standardized and volunteer patients were examined using the D-EYE and a conventional DO. Optic disk identification, EOU ratings of the devices, self-reported confidence level in their examination with the devices, and estimation of vertical cup-to-disk ratio (VCDR) were compared. …

Virtual Analyzers For Increasing The Intelligence Of Industrial Process Control Systems, Umidjon Abdimajotovich Ruziev Phd, Marufjon Kobuljanovich Shodiev

Chemical Technology, Control and Management

It is shown that the development and implementation of virtual analyzers of the quality of the final industrial products is an effective tool for increasing the efficiency of industrial production. The methodology and stages of development of virtual analyzers for predicting the quality of products, monitoring non-measurable or difficult-to-measure parameters of continuous and periodic technological processes are considered, and issues of supporting and adapting a virtual analyzer during its operation without restructuring are also considered.

Developing Advanced Process Control System For Manufacturing Processes Using Virtual Analyzer, Elyor Erkinovich Samadov

Chemical Technology, Control and Management

This research reflects outlines the main potential features of Advanced Process Control (APC) systems for improved control of technological processes and production. It is shown developing APC systems using a virtualized analyzer (VA) is a very effective technique to increase the efficiency of industrial production. This research reflects the main steps of generating VA as part of the APC system and also describes the key features of each step-in terms of analyzer synthesis.

Design Lifecycle Management Of Technological Processes, Yusuf Shodiyevich Avazov

Chemical Technology, Control and Management

The issues of life cycle management of design processes of complex technological processes are considered. An analysis of works devoted to the automated design of technological processes and industries, product life cycle management, and the use of predominant modeling in design is presented. A structure for the implementation of the design of technological processes is proposed and it’s components are described. An algorithm is proposed to reduce the life cycle of the design of a technological process. The sequence of selection of the most optimal project options with the help of the proposed algorithm is described. It is shown that …

Predictive Analysis And Synthesis, Modeling And Control Of Complex Technological Processes And Systems, Zhahongir Sherboyevich Bekqulov

Chemical Technology, Control and Management

Consider the theoretical underpinnings of practically predictive analysis and synthesis, modeling and automatic control of complex chemical technological processes and systems, and the evolution of advanced (or advanced) APC (Advanced Process Control) control of technological processes and industries. The current state of industrial automation systems and the characteristics of their deployment are highlighted. The features of each stage of the analysis and synthesis of APC - advanced process control for complex dynamic objects are disclosed. The real situation and features of the implementation of industrial automation systems of industrial enterprises are reflected.

New Transformer Changer Static Characteristics Measuring Angle Silences Difference, Sultan Faizullayevich Аmirov, Nurulla Raxmatullayevich Yuldashev

Chemical Technology, Control and Management

Presented the specific features of the new transformer converter, which measures the difference in angular displacement, and examines the nonlinearity levels of static characteristics, sensitivity and static characteristics. Studies have shown that in a new measuring device, where one of the two moving parts consists of a magnetic conductor made in the form of an Archimedean spiral made of ferromagnetic material, the balance of the magnetic bridge changes not only depending on the angle of rotation of it’s shoulder resistances. the current is disturbed by the change in the magnitude of the combined air gap depending on the angle of …

Quality Control Of Combustion Of Gaseous Fuel In Furnaces, Azamat Toirovich Rajabov

Chemical Technology, Control and Management

The issues of research and development of systems for monitoring the availability and quality of the process of fuel combustion in industrial furnaces are interpreted. The perspective of using new elements in control systems - communication sensors for the presence and quality in gas-burning installations and furnaces are shown. A method has been developed to control the optimal aeration coefficient based on the extreme of the total integral amplitude-frequency characteristic of the flame conductivity pulsations, which makes it possible to control the quality characteristics of gas-burner devices and control the ratio of the components of the combustible mixture with high …

Algorithm For Calculating The Parameters Of A Multi-Position Electromagnetic Linear Mechatronic Module, Nazarov Khayriddin Nuritdinovich, Matyokubov Nurbek Rustamovich, Temurbek Omonboyevich Rakhimov

Chemical Technology, Control and Management

Currently, in the world in the field of science, engineering and technology, including in mechatronics and robotics, the creation of multi-coordinate mechatronic systems that perform power and control functions is becoming of paramount importance, this is due to a number of important positive qualities of the systems, such as simplicity and compactness of the design, the possibility of obtaining significant efforts, high accuracy and stability of the establishment of fixed positions, ease of control and high reliability. This article presents the calculation of the parameters of multi-position mechatronic modules based on linear execution elements. In the construction of this model, …

Regular Algorithms For Adaptive Identification Of Linear Non-Stationary Systems, H.Z. Igamberdiyev, H.I. Sotvoldiev, U.F Mamirov

Chemical Technology, Control and Management

The article deals with the formation of regular algorithms for adaptive parametric spline identification of linear non-stationary systems. Analyzed the issues of constructing adaptive identification of continuous linear non-stationary systems with monotonic and sign-constant parameters. In this case, in a non-stationary system, the entire observation interval is in some way divided into sub-intervals. Identification is carried out at each of the parameter constancy intervals, while the parameter matrix is re-evaluated for the next interval. The input data of the system are determined with an error depending on the error of approximating the state of the system by splines and approximating …

A Study Of The Awareness And Utilization Of Digitized Resources In Selected University Libraries Of Karnataka, K N Lakshmipathi, Research Scholar, Centre For Research And Evaluation, Senhilkumar R., Research Supervisor, Bharathiar University & Librarian (Sg) & Head (Research), Dept. Of Lis, Kongunadu Arts And Science College (Autonomous)

Library Philosophy and Practice (e-journal)

Due to information explosion and overload of information, libraries are unable to procure or subscribe to the enormous published information. Libraries are finding it difficult to supply the most deemed reading materials such as reference, rare, career advancement, scholarly publications, government publications, and research related reading materials. Thus, to overcome this existing problem, now the libraries, especially university libraries are starting to digitize the value added reading materials and have made them available through a digital library, gateways, portals, archives, repositories, and consortium electronic platforms. In this context, the present study evaluates the awareness and utilization of digitized resources by …

Online Databases Backbone For Teaching And Research: Case Study Of Rajarambapu Institute Of Technology, Affiliated To Shivaji University, Kolhapur, Maharashtra (India), Vishwas L. Hase, Mahesh N. Gaikwad, Yuvraj G. Jadhav Assistant Professor , Dept. Of Library And Information Science

Library Philosophy and Practice (e-journal)

The library facilities and services have changed during the pandemic from both the librarians’ and library users’ points of view. Research and academic communication disseminated via emerging online databases and resulted in creating awareness and utilization of electronic resources remotely. The present study investigates the availability, awareness, and use of online databases subscribed from direct publishers and also accessed from Shivaji University, Kolhapur, India, under the INFEED project by Rajarambapu Institute of Technology (RIT) staff members and students during the lockdown period. A mixed research approach (i.e. quantitative and qualitative) has been applied by using an online questionnaire as a …

A Proof Of A Generalization Of Niven's Theorem Using Algebraic Number Theory, Caroline Nunn

Rose-Hulman Undergraduate Mathematics Journal

Niven’s theorem states that the sine, cosine, and tangent functions are rational for only a few rational multiples of π. Specifically, for angles θ that are rational multiples of π, the only rational values of sin(θ) and cos(θ) are 0, ±½, and ±1. For tangent, the only rational values are 0 and ±1. We present a proof of this fact, along with a generalization, using the structure of ideals in imaginary quadratic rings. We first show that the theorem holds for the tangent function using elementary properties of Gaussian integers, before extending the approach to other imaginary quadratic rings. We …

Development Of Job Satisfaction Scale For Female Library Professionals: Case Study, Punam Chauhan, Aditya Tripathi, Mohd Shoaib Ansari

Library Philosophy and Practice (e-journal)

It has been observed that there are no standard scales for measuring the job satisfaction of female library professionals. A scale would prove to be an excellent tool for developing policies for female library professionals. A questionnaire is prepared, which is further tested for reliability and validity, considered a standard scale. A survey method is used to collect the data for this purpose. The study suggests that job satisfaction variables are not unidirectional in their effect. The job itself can be a source of both satisfaction and dissatisfaction. The scale has good internal consistency. The scale has good internal consistency …

Outcomes Of Endolymphatic Sac Surgery For Meniere’S Disease With And Without Comorbid Migraine, Norman A. Orabi, Brian M. Kellermeyer, Christopher A. Roberts, Stephen J. Wetmore, Adam M. Cassis

Faculty & Staff Scholarship

Purpose. To explore outcomes of endolymphatic sac surgery for patients with Meniere’s disease with and without the comorbid condition of migraine. Materials and Methods. A retrospective chart review of adult patients undergoing endolymphatic sac surgery at a single tertiary care center from 1987 to 2019 was performed. All adult patients who failed medical therapy and underwent primary endolymphatic sac surgery were included. The main outcome measures were vertigo control and functional level scale (FLS) score. Patient characteristics, comorbidities, and audiometric outcomes were tracked as well. Results. Patients with Meniere’s disease and migraine had a stronger association with …

A Key Component Of Continuing Professional Development In The Maritime Context, Olga Zavalniuk, Volodymyr Nesterenko, Inna Zavalniuk, Halyna Doshchenko

International Maritime Lecturers' Association (IMLA) 2021 Joint Conference With IMEC32, ICERS15 and INSLC21

The maritime industry, one of the world’s most influential industries, is developing with a rapid speed. There is, therefore, a special need to find new approaches to prepare students to be ready for the changing realities of modern life. Taking into account generational peculiarities of information perception, new approaches were developed with the aim of building a number of competencies for future marine specialists in order to manage ships safely and efficiently. Ukrainian sailors are said to reflect a high level of training and professional skills, which is considered to be a distinguishing feature. Nevertheless, nowadays Ukrainian seafarers are facing …

Measurement Of Differential Branching Fractions Of Inclusive B →Xuℓ+Νℓ Decays, L. Cao, W. Sutcliffe, R. Van Tonder, F. U. Bernlochner, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, T. Bilka, J. Biswal, A. Bobrov, M. Bračko

Faculty and Student Publications

The first measurements of differential branching fractions of inclusive semileptonic B→Xuℓ+νℓ decays are performed using the full Belle data set of 711 fb-1 of integrated luminosity at the (4S) resonance and for ℓ=e, μ. With the availability of these measurements, new avenues for future shape-function model-independent determinations of the Cabibbo-Kobayashi-Maskawa matrix element |Vub| can be pursued to gain new insights in the existing tension with respect to exclusive determinations. The differential branching fractions are reported as a function of the lepton energy, the four-momentum-transfer squared, light-cone momenta, the hadronic mass, and the hadronic mass squared. They are obtained by subtracting …

Disorderly Conduct: An Investigation Into Police And Prosecutor Practices, Michael Cicchini

Lincoln Memorial University Law Review Archive

Disorderly conduct is usually a misdemeanor statute that criminalizes a broad range of behavior. Law professors have recently called for the abolition of such statutes, arguing that the police are surveilling African American neighborhoods “for signs of disorder” and using the statute “as a means of social control against people of color.”This Article investigates this claim of racist policing by examining a sample of disorderly conduct cases. The sample confirms that African Americans are indeed charged at a disproportionately high rate relative to their percentage of the population. However, the disproportionate charging is not due to racist police surveillance. Rather, …

German Through Media Ger 302, Joanna Burkhardt

Library Impact Statements

No abstract provided.

Regional Topological Aberrances Of White Matter- And Gray Matter-Based Functional Networks For Attention Processing May Foster Traumatic Brain Injury-Related Attention Deficits In Adults, Ziyan Wu, Meng Cao, Xin Di, Kai Wu, Yu Gao, Xiaobo Li

Publications and Research

Traumatic brain injury (TBI) is highly prevalent in adults. TBI-related functional brain alterations have been linked with common post-TBI neurobehavioral sequelae, with unknown neural substrates. This study examined the systems-level functional brain alterations in white matter (WM) and gray matter (GM) for visual sustained-attention processing, and their interactions and contributions to post-TBI attention deficits. Task-based functional MRI data were collected from 42 adults with TBI and 43 group-matched normal controls (NCs), and analyzed using the graph theoretic technique. Global and nodal topological properties were calculated and compared between the two groups. Correlation analyses were conducted between the neuroimaging measures that …

Scarcity Or Economic Insecurity? Two Yardsticks For Measuring Capitalism’S Performance, Costas Panayotakis

Publications and Research

This article argues that capitalism’s relationship to economic insecurity is as important for the evaluation of that system as its relationship to scarcity. Critically analyzing the neoclassical and Marxist focus on capitalism’s relationship to scarcity, the article describes how capitalism’s relationship to economic insecurity offers a more cogent elaboration of these traditions’ shared belief that the economic system should serve people. In particular, while critical of the neoclassical portrayal of capitalism as a system using scarce resources efficiently, this paper also argues, against Marxism, that an alternative to capitalism might be preferable even if scarcity is not abolished.

Rapid Land Assessment For Salt Farming Development In The Coastal Area Of The Special Region Of Yogyakarta, Indonesia, Malawani Mukhamad N., Marfai Muh Aris, Yoga Aldhila G. H., Handayani Tiara, Cahyadi Ahmad, Sadali Mohammad Isnaini, Mahasin Mohamad Zaki, Hendratmoro, Suadi, Wiyono Maryadi Budi

ASEAN Journal on Science and Technology for Development

The government of Indonesia has faced several challenges to its goal of achieving salt self-sufficiency, necessitating the formulation and implementation of strategic steps to increase salt production. Among its islands, Java has a great deal of potential for salt production, as does the Special Region of Yogyakarta, where the government has initiated salt farming development as part of its coastal community empowerment program. This study aimed to (1) evaluate the land suitability of existing salt farms and (2) identify potential sites and make a productivity estimation of salt farms in the Special Region of Yogyakarta, with the broad objective of …

Bcsa Rawmix Design: Correlation Between Chemical Constituents And Mineralogy, Palla Suresh, Vanguri Suresh, Ramakrishna S, Chaturvedi S. K, Mohapatra B. N

ASEAN Journal on Science and Technology for Development

The cement industry has been identified as one of the main contributors to climate change due to greenhouse gas emissions, mainly CO2. Therefore, to meet CO2 reduction targets, cement producers are working on different strategies of minimizing its emission, one of which is alternative clinkers. This study assessed the impact of variations of the raw mix design, concerning the type and proportions of materials, on the formation of calcium sulphoaluminate belite-type clinkers. Various materials were used to produce raw mixes for different percentages of belite, yeeliminite, and other minerals in resultant clinkers. Computer-based theoretical mixes were designed with different percentages …

Analyzing The Application Of Void Decks On High-Rise Affordable Housing In Jakarta, Indonesia, To Achieve Optimal Urban Ventilation, Ririhena Megan Afkasiga, Syafii Nedyomukti Imam

ASEAN Journal on Science and Technology for Development

Economic growth in ASEAN countries encourages significant urbanized growth. In line with the growth of urbanization, large swathes of residential buildings have been constructed in urban areas, especially, in the case of Indonesia, through the government's 1000 rusun (high-rise affordable housing) development program in Jakarta. In order to reduce energy consumption and create a sustainable rusun, a passive strategy is needed in the form of natural air conditioning through optimized natural ventilation in these buildings. In this study, testing was conducted on Rusun Rorotan in Jakarta, from two wind source directions (north and northwest) with five void decks configuration samples …

Dielectric Relaxation Studies Of Hydrogen Bonded Complexes Of Benzamide And Acetamide With Halogenated Phenols Using X-Band Microwave Frequency, Basha A. Aathif, Khan F. Liakath Ali

ASEAN Journal on Science and Technology for Development

At 308 K, using a 9.37 GHz dielectric relaxation setup, dielectric studies of hydrogen bonded complexes of benzamide and acetamide with 4-fluorophenol, 4-bromophenol, 4-chlorophenol, and 4-iodophenol in benzene were performed. Various dielectric parameters (such as ?', ?'', ?0, ??) were tested. The steric interactions of the proton donor determined the group rotation relaxation time t(2), whereas the significance of the single frequency method of Higasi et al. for multiple relaxation time t(1) was determined by the hydrogen bonding power of the phenolic hydrogen. The presence of a 1:1 complex system between the prepared samples, as well as a charge transfer …

Potential Of Three Taro (Colocasia Esculenta L.) Cultivars As Animal Feed, Setyawan Hidayat Bambang, Yulianto Roni, Zelin Oviaki, Purnamasari Listya

ASEAN Journal on Science and Technology for Development

The growth and yield of taro (Colocasia esculenta L.) plants are influenced by the planting material. The use of planting material derived from corms is expected to improve the quality and quantity of taro growth and yield. This research aimed to find the best type of planting material and cultivars for taro growth and the potential of taro plants as animal feed. The experiment was carried out in Jember, East Java ( elevation ±89 m asl). The experiment used the randomized completed block design method with two treatment factors, the type of planting material (B) as the first factor (B1: …