Compartmentalisation of molecular catalysts for nonorthogonal tandem catalysis

2022 ◽  
Author(s):  
Peiyuan Qu ◽  
Jacob W. Cleveland ◽  
Eman Ahmed ◽  
Fangbei Liu ◽  
Sage Dubrawski ◽  
...  
Keyword(s):  
Tandem Catalysis ◽  
Timely Manner ◽  
Complex Products ◽  
Molecular Catalysts

The development of nonorthogonal tandem catalysis enables the use of a combination of arbitrary catalysts to rapidly synthesize complex products in a sustainable, efficient, and timely manner.

APPLYING THE ISF TECHNOLOGY TO PRODUCE THE CAR PART MODELS

2010 ◽  
Vol 13 (4) ◽  
pp. 91-98
Author(s):  
Tuan Dinh Phan ◽  
Binh Thien Nguyen ◽  
Dien Khanh Le ◽  
Phuong Hoang Pham
Keyword(s):  
Rapid Prototyping ◽  
Incremental Sheet Forming ◽  
Cad Model ◽  
Post Processing ◽  
Technological Parameters ◽  
Batch Production ◽  
Complex Products ◽  
3D Cad ◽  
Real Size ◽  
Single Batch

The paper presents an application the research results previously done by group on the influence of technological parameters to the deformation angle and finish surface quality in order to choose technology parameters for the incremental sheet forming (ISF) process to produce products for the purpose of rapid prototyping or single-batch production, including all steps from design and process 3D CAD model, calculate and select the technological parameters, setting up manufacturing and the stage of post-processing. The samples formed successfully showed high applicability of this technology to practical work, the complex products with the real size can be produced in industries: automotive, motorcycle, civil...

Developing and implementing the risk management framework into business processes of Gazprom transgaz Tomsk Ltd., for implementation of the Eastern gas program of PJSC Gazprom

2020 ◽  
Vol 17 (1) ◽  
pp. 68-77
Author(s):  
V. E. Zaikovsky ◽  
A. V. Karev
Keyword(s):  
Risk Management ◽  
Human Resources ◽  
Management Information System ◽  
Business Processes ◽  
Project Success ◽  
Management Information ◽  
Timely Manner ◽  
Project Approach ◽  
Management Framework ◽  
Risk Management Framework

Project success depends on the ability to respond to risks and make correct decisions in a timely manner. The project approach provides a better framework for implementing a new management system into the company’s business processes. The risk management framework developed by the company comprises a risk management infrastructure, a set of standards, human resources, and a risk management information system. To improve staff compliance, it is necessary to provide training and to communicate the goals of the project effectively. It is also important to develop a motivation system because well trained and motivated staff are able to work more efficiently.

Epidemiological Characterization of the Infection by Treponema Pallidum in Pregnant Women in Beira City, Sofala, Mozambique

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Nchowela Guido
Keyword(s):  
Pregnant Women ◽  
Congenital Syphilis ◽  
Health Centre ◽  
Treponema Pallidum ◽  
Timely Manner ◽  
Pregnancy And Childbirth ◽  
Epidemiological Characterization ◽  
Active Syphilis ◽  
Structured Questionnaire

Introduction: Syphilis is one of several diseases that can be transmitted during pregnancy and childbirth, which can lead to complications during pregnancy and in the newborn. This is especially so when the pregnant woman is not diagnosed or treated properly and in a timely manner. Methodology: Data from 262 pregnant women prospectively included, aged 18-41years, attended at the Ponta Gêa Health Centre for antenatal clinics has been analyzed from January to September of 2016. In the prospective study, a rapid treponemal and a non-treponemal test were performed. A structured questionnaire was used to collect socio demographic and clinical variables, which was developed from the literature review. Results: The prevalence of active syphilis was 11.8%; the majority of reactive pregnant women were aged 18-25years (55.4%), (61.3%) of pregnant women were treated with doses below those recommended; only a small number of the partners were treated successfully. The highest seroprevalence of syphilis was found in housewives (77%), in those who attended primary education (71.6%) in those who had a monthly income of 1000- 3000 MZN (70.3%), in those with two or more pregnancies (55.7%) and living with someone has husband and wife (63.5%). The syphilis/HIV co-infection rate was high. Conclusion: According to the results obtained in this study, urgent measures are needed to assess the problems encountered and to improve the screening approach, treatment and monitoring of syphilis during pregnancy in order to prevent the cases of congenital syphilis.

Structural Analysis of Product and Computer-Aided Assembly Planning in AssemBL Software Package

2018 ◽  
pp. 11-33
Author(s):  
A. N. Bozhko
Keyword(s):  
Computer Aided Design ◽  
State Of The Art ◽  
Graph Model ◽  
Design System ◽  
Assembly Planning ◽  
Complex Products ◽  
Assembly Sequences ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

Computer-aided design of assembly processes (Computer aided assembly planning, CAAP) of complex products is an important and urgent problem of state-of-the-art information technologies. Intensive research on CAAP has been underway since the 1980s. Meanwhile, specialized design systems were created to provide synthesis of assembly plans and product decompositions into assembly units. Such systems as ASPE, RAPID, XAP / 1, FLAPS, Archimedes, PRELEIDES, HAP, etc. can be given, as an example. These experimental developments did not get widespread use in industry, since they are based on the models of products with limited adequacy and require an expert’s active involvement in preparing initial information. The design tools for the state-of-the-art full-featured CAD/CAM systems (Siemens NX, Dassault CATIA and PTC Creo Elements / Pro), which are designed to provide CAAP, mainly take into account the geometric constraints that the design imposes on design solutions. These systems often synthesize technologically incorrect assembly sequences in which known technological heuristics are violated, for example orderliness in accuracy, consistency with the system of dimension chains, etc.An AssemBL software application package has been developed for a structured analysis of products and a synthesis of assembly plans and decompositions. The AssemBL uses a hyper-graph model of a product that correctly describes coherent and sequential assembly operations and processes. In terms of the hyper-graph model, an assembly operation is described as shrinkage of edge, an assembly plan is a sequence of shrinkages that converts a hyper-graph into the point, and a decomposition of product into assembly units is a hyper-graph partition into sub-graphs.The AssemBL solves the problem of minimizing the number of direct checks for geometric solvability when assembling complex products. This task is posed as a plus-sum two-person game of bicoloured brushing of an ordered set. In the paradigm of this model, the brushing operation is to check a certain structured fragment for solvability by collision detection methods. A rational brushing strategy minimizes the number of such checks.The package is integrated into the Siemens NX 10.0 computer-aided design system. This solution allowed us to combine specialized AssemBL tools with a developed toolkit of one of the most powerful and popular integrated CAD/CAM /CAE systems.

Specifics of capital structure management of electronic commerce market leaders

2020 ◽  
Vol 16 (5) ◽  
pp. 905-919
Author(s):  
R.O. Voskanyan
Keyword(s):  
Capital Structure ◽  
Customer Service ◽  
Financial Statements ◽  
Financial Resources ◽  
Ratio Analysis ◽  
Timely Manner ◽  
Aggressive Approach ◽  
Scientific Methods ◽  
General Scientific ◽  
Management Policies

Subject. The article addresses leader companies of the e-commerce market in terms of sales and capitalization, that make their financial statements publicly available. Objectives. The aim is to identify special aspects of capital structure management policies of the largest e-commerce players based on ratio analysis. Methods. The study employs general scientific methods of research. Results. The paper reveals the specifics of capital structure management of the global e-commerce market leaders. The leading companies prefer an aggressive approach to the formation of their capital structure, increasing the volume of borrowed capital in comparison with their equity. The management of companies tries to provide a moderate approach to capital structure management and debt servicing, demonstrating the ability to repay debts in a timely manner. Aggressive capital structure policy is conditioned by specific activities of e-commerce companies, requiring constant search for and attraction of additional financial resources for improving production processes by management. Conclusions. Key players have an aggressive capital structure policy. This feature is necessitated by the need to systematically attract additional financing to expand the business, increase sales volumes, capture and create new markets. E-commerce companies have to constantly improve technology, logistics processes, and render a good and excellent customer service.

An NADH-Inspired Redox Mediator Strategy to Promote Second-Sphere Electron and Proton Transfer for Cooperative Electrochemical CO2 Reduction Catalyzed by Iron Porphyrin

2020 ◽  
Author(s):  
Peter T. Smith ◽  
Sophia Weng ◽  
Christopher Chang
Keyword(s):  
Proton Transfer ◽  
Co2 Reduction ◽  
Iron Porphyrin ◽  
Redox Mediators ◽  
Reservoir Properties ◽  
Proton Reduction ◽  
Electrochemical Co2 Reduction ◽  
Starting Point ◽  
Rate Improvement ◽  
Molecular Catalysts

We present a bioinspired strategy for enhancing electrochemical carbon dioxide reduction catalysis by cooperative use of base-metal molecular catalysts with intermolecular second-sphere redox mediators that facilitate both electron and proton transfer. Functional synthetic mimics of the biological redox cofactor NADH, which are electrochemically stable and are capable of mediating both electron and proton transfer, can enhance the activity of an iron porphyrin catalyst for electrochemical reduction of CO<sub>2</sub> to CO, achieving a 13-fold rate improvement without altering the intrinsic high selectivity of this catalyst platform for CO<sub>2</sub> versus proton reduction. Evaluation of a systematic series of NADH analogs and redox-inactive control additives with varying proton and electron reservoir properties reveals that both electron and proton transfer contribute to the observed catalytic enhancements. This work establishes that second-sphere dual control of electron and proton inventories is a viable design strategy for developing more effective electrocatalysts for CO<sub>2</sub> reduction, providing a starting point for broader applications of this approach to other multi-electron, multi-proton transformations.

Host-Guest Interactions on Electrode Surfaces for Immobilization of Molecular Catalysts

2020 ◽  
Author(s):  
Laurent Sévery ◽  
Jacek Szczerbiński ◽  
Mert Taskin ◽  
Isik Tuncay ◽  
Fernanda Brandalise Nunes ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Heterogeneous Systems ◽  
Catalytic Systems ◽  
New Approach ◽  
Molecular Systems ◽  
Electrode Surfaces ◽  
Catalytic Surfaces ◽  
Oxide Electrodes ◽  
The Stability ◽  
Molecular Catalysts

The strategy of anchoring molecular catalysts on electrode surfaces combines the high selectivity and activity of molecular systems with the practicality of heterogeneous systems. The stability of molecular catalysts is, however, far less than that of traditional heterogeneous electrocatalysts, and therefore a method to easily replace anchored molecular catalysts that have degraded could make such electrosynthetic systems more attractive. Here, we apply a non-covalent “click” chemistry approach to reversibly bind molecular electrocatalysts to electrode surfaces via host-guest complexation with surface-anchored cyclodextrins. The host-guest interaction is remarkably strong and allows the flow of electrons between the electrode and the guest catalyst. Electrosynthesis in both organic and aqueous media was demonstrated on metal oxide electrodes, with stability on the order of hours. The catalytic surfaces can be recycled by controlled release of the guest from the host cavities and readsorption of fresh guest. This strategy represents a new approach to practical molecular-based catalytic systems.

REORGANIZATION OF A MULTI-SPECIALTY HOSPITAL IN AN UNFAVORABLE EPIDEMIOLOGICAL SITUATION

2020 ◽  
pp. 43-46
Author(s):  
Nikitin A.E. ◽  
Znamenskiy I.А ◽  
Shikhova Yu.A. ◽  
Kuzmina I.V. ◽  
Melchenko D.S. ◽  
...  
Keyword(s):  
Contact Time ◽  
Laboratory Diagnostics ◽  
Protective Equipment ◽  
Timely Manner ◽  
High Quality ◽  
Institu Tions ◽  
Quality Of Medical Care ◽  
Spread Of Infection ◽  
Epidemiological Situation

This study provides a retrospective analysis of work to ensure high quality of medical care in an unfavorable epidemic situation. The consequence of COVID-19 was the implementation of a program to prevent the spread of infection, the re-profiling of medical institu-tions, and the introduction of restrictive and anti-epidemic measures. The experience of our work has shown the effectiveness of changing the order of med-ical care, the organization of the functioning of de-partments and patient routing. The study reflects the measures implemented in the hospital departments, the Department of clinical and laboratory diagnostics, radiation diagnostics and pathology Department. To ensure the safety of patients, it was decided to place patients on a single bed according to the type of infec-tious boxes. The safety of employees was ensured by the use of personal protective equipment, minimiza-tion of contact time with patients, and preventive weekly examination of staff for SARS-CoV-2 infection. The organized and well-coordinated work of the en-tire staff of the institution made it possible to prevent the spread of COVID-19 among employees, to detect cases of infection in a timely manner, and to carry out appropriate isolation and monitoring measures. At the time of completion of infectious diseases departments, the mortality rate among patients was less than 9%. Our experience in reorganizing a multi-specialty facil-ity can be used in the future when working with pa-tients who have undergone COVID-19, as well as in the context of a worsening epidemic situation.

Impact of Organizational Culture and Teacher Performance on Quality of Learning Processes

2020 ◽  
Vol 4 (2) ◽  
pp. 95-110
Author(s):  
Buyung Syukron ◽  
Andi Thahir ◽  
Tin Amalia Fitri ◽  
Asep Rohman
Keyword(s):  
Organizational Culture ◽  
Elementary Schools ◽  
Learning Process ◽  
Teacher Performance ◽  
Work Culture ◽  
Timely Manner ◽  
Quality Learning ◽  
The City ◽  
Determining Factor

The learning process in madrasas (Islamic-based elementary schools) is seen as being able to contribute to instilling values and norms in students following Islamic teachings. The issue of organizational culture and teacher performance also becomes a determining factor in creating a quality learning process. In this research, the aim is to determine: 1) the effect of organizational culture on the quality of the learn-ing process; 2) the effect of teacher performance on the quality of the learning process; and 3) the influ-ence of organizational culture on teacher performance. Respondents in this study were all class teachers from three madrasas as a sample representing all public madrasas in the city of Bandar Lampung, Indo-nesia. The results obtained indicate that the variables of organizational culture and the quality of the learning process have an influence, with R squared of 0.67 or 67%, which is classified as moderate. This shows that madrassas have implemented predetermined work culture values, namely: a) integrity, the harmony between correct thoughts, words, and deeds; b) professionalism, working in a disciplined, competent, and timely manner with the best results; c) innovation, perfecting existing and creating new and improved techniques and ideas; d) responsibility, working thoroughly and with thought for the con-sequences; and e) being exemplary, setting a good example for others.

Information publicity and transparency of budget process in the consolidated territorial communities of Lvivska oblast: estimation and ways of improvement

2019 ◽  
pp. 46-52
Author(s):  
Olha Zhabynets
Keyword(s):  
Personal Responsibility ◽  
Local Level ◽  
Financial Information ◽  
Reform Process ◽  
Budget Process ◽  
Timely Manner ◽  
Public Authorities ◽  
Information Transparency ◽  
Key Indicator ◽  
Disclosure Of Information

In the process of decentralization in Ukraine, the information transparency of the management becomes important, which implies the openness and accessibility of information for all members of society. It reflects the current and perspective states of the reform process. Decentralization means not only a transferring of powers, but also financial resources and responsibilities from public authorities to local authorities. So the information publicity and transparency of the budget process should become the key indicator to estimate the effectiveness of the management of the finances of the consolidated territorial communities (CTCs). The purpose of the article is to evaluate and propose ways to increase the information publicity and transparency of the budget process at the local level. The author analyzes the implementation of the requirements of the Ukrainian legislation about informational publicity and transparency of the budget process in the CTCs of Lvivska oblast established in 2015-2017 and shows positive and negative moments in displaying of financial information on CTCs’ sites. A number of measures are proposed to increase the information publicity and transparency of the budget process at the local level. The author considers that in order to ensure publicity and transparency of the budget process in the CTCs of Lvivska oblast it is necessary: to unify and maximally simplify the mechanism of access of CTCs’ members to financial information through the standardization of the procedure for disclosure of information about the budget process; to increase the personal responsibility of the heads of the CTCs for the lack of financial information that is due to be published on the site of communities; to continuously monitor the availability and updating of information about the budget process on the CTCs’ sites in order to respond in a timely manner to the appearance of possible negative trends; to take preventive measures with the use of appropriate sanctions (fine, removal from office, etc.) in cases of delaying the submission of actual financial information to the site of CTCs, the disclosure of information in its entirety, the discovery of unreliability of financial information or other manipulations with figures or financial documents filed on CTCs’ website.

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