Edge-Segregated Ternary Pd-Pt-Ni Spiral Nanosheets as High-Performance Bifunctional Oxygen Redox Electrocatalysts for Rechargeable Zinc−Air Batteries

Rational design of high-perfomance bifunctional electrocatalysts to simultaneously accelerate the sluggish reversible oxygen reduction and evolution reactions (ORR and OER) is an enormous challenge that restricts the working efficiency and...

Indoor Environmental Quality Survey in Research Institute: A Floor-by-Floor Analysis

Comprehensively monitoring indoor environmental quality (IEQ) parameters and their dynamic relations is essential to ensure improved productivity and a healthy environment for building occupants. Although IEQ significantly influences working efficiency, studies addressing this aspect with researchers in institutes as the focal point are limited. Thus, this study employed drill-down analyses, such as floor-by-floor and building-by-building examinations and used an occupant IEQ survey approach to evaluate working conditions in research buildings. This study systematically and objectively assessed IEQ using the Korea building occupant survey system. The results indicate that acoustic qualities affect the work productivity and satisfaction of the building occupants. The floor-by-floor analysis is necessary to identify IEQ factors and the reasons for the satisfaction of occupants. Additionally, it is important to improve the user-friendliness of the system, implement frequent survey distribution systems, and empirically analyze data associations among building, spatial, and demographical characteristics.

Robotic Mowing of Tall Fescue at 90 mm Cutting Height: Random Trajectories vs. Systematic Trajectories

Tall fescue (Schedonorus arundinaceus (Schreb.) Dumort.) is often managed with a cutting height ranging from 70 to 100 mm in ornamental lawns. Some autonomous mowers have been specifically designed to maintain mowing height in the same range. Generally, autonomous mowers operate by following random trajectories, and substantial overlapping is needed to obtain full coverage of the working area. In the case of tall grass, this may cause lodging of grass plants, which in turn may reduce turf quality. The introduction of a navigation system based on systematic trajectories has the potential to improve the performances of autonomous mowers with respect to machine efficiency and turf quality. With the aim of determining the effects of reduced mowing frequency and systematic navigation systems on turf quality and mower performances in terms of working time, energy consumption and overlapping, the performances of two autonomous mowers working with random and systematic trajectories were tested on a mature tall fescue lawn at 90 mm cutting height. The working efficiency was approximately 80% for the systematic trajectories and approximately 35% for the random trajectories; this was mainly due to the lower overlapping associated with systematic trajectories. Turf quality was slightly higher for the mower working systematically (a score of 8 using a 1–9 score with 1 = poor, 6 = acceptable and 9 = best) compared to the one working randomly (quality of 7 and 6 on a 1–9 scale with 1 = poor and 9 = best). No appreciable lodging was observed in either case. For tall, managed lawns, systematic trajectories may improve autonomous mowers’ overall performances.

Analiza porównawcza zarządzania bezpieczeństwem zdrowotnym państwa a jego rozwój gospodarczy

Assuming that social health status affects the level of human capital, the priority of every modern state should be to ensure that its citizens are provided with adequate health condi-tions, and thus a sense of health safety. Consequently, state activities aimed at managing safety in the field of health policy should translate into both productivity and working efficiency of society, which in turn should stimulate the economic development of the country. This paper attempts to present selected health safety measures to improve the health of the population with the example of the activities of the EU and public institutions in selected voivodeships imple-menting the principles of sustainable development and long-term investment in society. In this paper, an analysis of documents relating to direct actions with regard to this issue has been used as a research method. The conducted research shows that the cooperation of EU Member States creates a platform for cooperation on combating health inequalities and basic social determinants of health, the aim of which is to improve the health and quality of life of EU citizens, which in turn should translate into accelerating economic development.

Influence of Harmonics on the Working Efficiency of a 6/1.2 kV Transformer in a Pit Mine

Explosion-proof transformers 6/1.2 kV is important electrical equipment responsible forsupplying electricity in underground mine electrical networks. A failure of this transformer will cause aninterruption in the power supply and loss of safety in underground mining. Usually, explosion-prooftransformers in underground mine electrical networks are designed and manufactured to work with idealparameters such as sinusoidal currents, and the network structure is symmetrical. However, today inunderground mine electric networks, many power electronics are connected to the network, such asinverters and soft starters. As a result, a current flowing through the transformer is non-sinusoidal,overloading the transformer even by working with the design specifications. This paper studies theinfluence of harmonics on the working efficiency of a 6/1.2 kV transformer in a pit mine. Research resultssuggest reasonable solutions for transformer operation to ensure longevity and not cause damage to thetransformer.

Review on Materials Used for Enhancing the Efficiency of Solar Cells

Global resources are limited and mindless use of them will finally lead to a scarcity. The need of the hour is to find the alternative energy resources which are abundant in nature and which deviate us from using fossils fuels. Solar Energy has gained a significant popularity in the past few decades as it is clean, meaning it does not release greenhouse gases and other harmful pollutants. It is also an abundant source of energy as it is available till the existence of the planet. Unlike fossil fuels, which are finite and cannot be replenished for thousands of years. Another drawback of fossil fuels is that they emit greenhouse gases and contribute to global climate change. Solar energy is an important technology for many reasons and has become a popular topic as many scientists around the world are working to increase the photo-electron conversion efficiency with minimum production cost. Diversified approaches have been undertaken to enhance the efficiency of solar cell. This paper will review the current state of art on photovoltaic cells (PVCs) in context to the materials used for fabrication, their possible cost and their working efficiency. This paper will also undertake the challenges that came across during the whole process and their possible solutions.

Evaluation of Staff Satisfaction After Implementation of a Routine Work Checklist in An Oral Outpatient Department and Its Effect On Work Efficiency

Background: To evaluate the feasibility, effectiveness and sustainability of using a checklist in the routine work of a stomatological outpatient department and investigate the satisfaction of the nursing staff with the checklist.Methods: The study was divided into two stages: design and manufacture the checklist and apply the checklist. After the expert group performed stage one, an analysis of work efficiency and work omissions and a survey of staff satisfaction were carried out. The results of the groups either using the checklist (n = 30) or not (n = 30) were analysed and compared.Results: The average time of the checklist group was 15.20±1.70 min, and the average time of the nonchecklist group was 25.30±2.70 min, P < 0.001. The working efficiency of the checklist group was significantly higher than that of the nonchecklist group. The omission rate was 0% in the checklist group and 16.67% in the nonchecklist group. Staff satisfaction with the use of the checklist was high.Conclusion: The checklist can make routine work more efficient and convenient in a stomatological outpatient department. It is recommended for use in stomatological outpatient departments or hospitals.

Tactics for using a Mobile Robot to Recover an Overturned wheeled Vehicle

This paper describes mobile robot tactics for recovering a wheeled vehicle that has overturned. If such a vehicle were to tip over backward off its wheels and become unable to recover itself, especially in areas where it would be difficult for humans to enter and work, total working efficiency could decline significantly, not only because the vehicle is no only able to perform its job, but because it becomes an obstacle to other work. Herein, we propose a robot-based recovery method that can be used to recover such overturned vehicles and demonstrates its utility. The recovery robot, which uses a mounted manipulator and hand to recover the overturned vehicle, is also equipped with a camera and a personal computer (PC). The ARToolKit software package installed on the robot-mounted PC detects ARmarkers attached to the overturned vehicle and uses the information they provide to orient itself in order to perform recovery operations. To facilitate these ARToolKit-based operations, it is necessary to conduct a theoretical analysis to clarify the distance between the robot manipulator and vehicle, and thus achieve an objective position for grasping the overturned vehicle. The experimental results obtained in this study demonstrate the effectiveness of our proposed system.

The Strategic Planning and Branding Tactics of Meituan

Meituan, an Internet company that focuses on businesses such as food delivery and hotel-ordering, was first launched in 2009. Within a decade, Meituan has evolved into a shopping platform that Chinese rely on, due to Meituan’s smart strategic planning, marketing positioning, high working efficiency, and its variety of business branches. Meituan has emerged as one of the Top 20 Risers global brands and ranked 54th among the Top 100 brands in 2020. As a service company that occupies the biggest portion of food delivery within the Chinese market, it’s of significance to explore what factors make Meituan the most successful and popular platform that changes people’s way of living. By investigating on Meituan’s financial reports, industry analysis, case studies and peer brand comparison, this paper will analyze Meituan’s strategic planning and development of its business and its linkage with consumer psychology, examine the factors that contribute to Meituan’s success, and provide inspiration of the brand’s future development.

Development of Multipurpose Biowaste Shredder Machine

The scope of this project was to design and develop a Shredder machine with focus on chopping of coconut leaves, areca leaves, this chopped powder to prepare the vermin compost. The project began with collection of information and data on user lifestyle and current process by which they perform their job. Concepts were developed with reference of four different shredder machine and operating processes. Concept was developed considering the safety factor users operating environment and maintenance. Considering the users’ needs and buying capacity, a prototype was fabricated. The machine consists of singlephase motor, bearings, structural frame, cutter and shaft. The machine frame is built using mild steel and CPM REX M4 HC is used for cutter tip preparation. Four cutters are mounted on shafts, which rotates.. The power from the electrical motor is transmitted to cutter shaft through a belt drive. Cut is made inside the chopping house due to the effect of tensile, friction, and impact effect in chopping process. The coconut leaves get chopped and powder is collected. The possible outcomes of this project are:  The working efficiency is set to increase with the reduced power to weight ratio.  Reduced cost with reliable performance output.  People with different physics can be accommodated on this equipment. Keywords: Agro waste; shredding machine; Cutter, Single-Φ motor, shaft.