Determination of Vibroacoustic Parameters of Polyurethane Mats for Residential Building Purposes

This paper is aimed at investigating the use of polyurethane mats, usually used as ballast mats, for residential building purposes. Ballast mats have features that may improve the vibroacoustic comfort in residential rooms. Their strength is certainly an advantage, along with vibration and acoustic insulation. However, the problem that an engineer has to deal with, for example in modeling these types of mats, is a limited knowledge of the material’s vibroacoustic parameters. Knowledge of these may be useful for residential buildings. This paper presents measurements of the vibroacoustic parameters of polyurethane mats, together with a suitable methodology and some results and analysis. The two main material parameters responsible for vibroacoustic protection were measured: the dynamic stiffness, which is related to the acoustic properties of the material, and the critical damping coefficient, which is obviously responsible for damping. The measurement methodology is clearly described. A total of five polyurethane materials with different densities were tested. It was possible to identify a relationship between the material density and the vibroacoustic parameters, which could offer an indication of which material to use, depending on the stimulus affecting a human in a given location.

Evaluation of Green Areas of Konya Selçuklu, Bosna-Hersek Neighborhood in Terms of Sufficiency, Management and Usage

Green areas are spaces organized as areas where people can get rid of their monotonous lives and meet their active or passive recreation needs. In order for a society to be physically and mentally healthy, green spaces must fulfil the purposes of establishment. The main material of the research is the green areas of Bosna-Hersek neighbourhood. The questionnaire method was used in the study and the green areas in Konya province Selçuklu district Bosnia and Herzegovina neighbourhood were evaluated in terms of sufficiency, management and usage

The Mapping of Mosque Community to Improve Mosque Engagement in Community

The Mosque in the Prophet Muhammad SAW era had a strategic role. The role is to be a solution and provide prosperity for the Muslims in particular and the surrounding community in general. Currently, the mosque plays a narrower role. It is a provider of facilities for pilgrims to carry out routine worship. In order for this role to increase, the mosque administrator, called DKM (Mosque Prosperity Council), must know his congregation more closely so that he knows what is needed and then comes to provide solutions. This study aims to create and implement an information system to manage congregational data to improve the role of mosques in the community. The main material that was obtained and prepared was data on residents around the mosque and the stakeholder needs (leaders of organizations around the mosque such as the heads of hamlet (RW), neighbourhood (RT), and youth organizations). The citizen data and stakeholder needs are used to develop the system. Because the specifications of the requirements can change during system development, the development method chosen is the prototyping method. There are two main outputs of this activity, namely the availability of a congregational data mapping application, and the installation of internet network infrastructure at the mosque. The two outputs in their implementation have proven to be beneficial for the congregation and the surrounding community. The information system provides improved service quality to pilgrims and residents in various activities such as zakat and qurbani. Meanwhile, Internet infrastructure provides new hope in easing the burden of community quotas and bringing children closer to the mosque.

Moisture- and mould-proof characteristics of surface modified wood for musical instrument soundboards

Wood is the main material used for musical instrument soundboard fabrication, for practical and cultural reasons. As a natural material, however, wood is easily degraded due to moisture or fungal corrosion. Most traditional wood protection methods were devised for structural materials, and may thus not be suitable for application in musical instrument soundboard materials. In the current study, a novel nanomaterial-based modification method was applied to wood. The surface of wood was coated with polyurethane and MgAl-layered double hydroxide nanosheets after a convenient impregnation process. The modified wood exhibited improved hydrophobicity and mould-resistance, while maintaining its acoustic properties. This modified wood may facilitate the construction of soundboards with longer lifespans.

Situational-scenario approach to formation costs of production and technological activities of fishing vessels on voyage

Increasing the efficiency of tapping the aquatic biological resources by fishing vessels directly depends on the improvement of production and technological activities in the unpredictable field conditions. Like any production process, the production and technological activity of fishing vessels is associated with the occurrence of costs at all stages (phases) of the production process, the aggregate and structure of which depends on the fishing technological system of the fishing vessel. The stages of the production process form the main material flow, ensuring its end-to-end promotion. Its efficiency significantly affects the costs and management of field resources and should be achieved by minimizing material losses, primarily in the process of extracting raw materials. For this, it is necessary to study the field conditions in which the production and technological process takes place within the framework of the production vessel, determine their structure, variability, analyze the structure and composition of production costs at all phases of the production and technological process, develop a situational and scenario approach to the formation of production and technological activities of fishing vessels on a fishing trip. The costs arising in all subsystems (phases) and operating on a constant basis throughout the entire fishing period are proposed to be divided into several types of costs. Their interrelated and interdependent influence can give both a general determinism to the production process and increase its imbalance, increasing the total fishing costs of a producing vessel due to the emergence of additional costs associated with an unstable fishing situation in the fishing area. In this regard, the production activity on the fishing vessel is carried out according to the formed fishing and technological scenarios. The developed block diagram of the totality of fishing costs during the movement of the main material flow through the phases of the fishing and technological system of a fishing vessel gives a complete picture of the total fishing costs of a fishing vessel when it simultaneously performs the processes of extraction and processing of aquatic biological resources with a situational-scenario approach to their formation.

ДЕЦЕНТРАЛІЗАЦІЯ В ТЕРИТОРІАЛЬНИХ ГРОМАДАХ НА СХОДІ УКРАЇНИ: ОБҐРУНТУВАННЯ ПРОЕКТУ

The need to implement a project to provide scientific support for financial planning for the development of territorial communities in eastern Ukraine is due to the presence of major risks arising from the military conflict and the COVID pandemic. The implementation of the project on decentralization of fiscal processes in territorial communities in the East of Ukraine will help communities to orientate in financial planning, as well as will benefit other stakeholders. The purpose of the article is to substantiate the project on the need and possibility of scientific support for the decentralization of fiscal processes in territorial communities in eastern Ukraine. The object of research - territorial communities in eastern Ukraine. Methods used in the study: comparative and expert analysis, detailing and generalization. The hypothesis of the study was the assumption that the project to decentralize fiscal processes in local communities in eastern Ukraine should be implemented by experts - economists and lawyers in the number of six people who will perform the proposed list of scientific and analytical work within - six months. Presentation of the main material: in order to intensify the process of decentralization of fiscal processes in territorial communities in eastern Ukraine, it is appropriate to implement a project involving the formation of a group of experts (economists and lawyers), logical and related research to be carried out by specific experts. which should get the appropriate results. The proposals developed by experts will create sustainable financial mechanisms that will help reduce the risk of disasters at the community level. The originality and practical significance of the study lies in the proposal to involve in the project relevant specialists who must perform the established list of scientific and analytical work and obtain concrete results. Conclusions and prospects for further research. Substantiation of the project on the need and possibility of scientific support for decentralization of fiscal processes in local communities in eastern Ukraine led to the conclusion that the project will help local communities in eastern Ukraine to understand the features of financial planning, as well as benefit other stakeholders. financial opportunities and sources of development of territorial communities in order to strengthen their economic potential. The proposals developed by experts will create sustainable financial mechanisms that will help reduce the risk of disasters at the community level. Further research should be aimed at implementing the proposed proposals and evaluating their effectiveness.

Plywood Production Development Strategy at CV Alaf Denida

CV Alaf Denida is a local wood-processing company located in Babat, Lamongan, East Java. CV Alaf Denida started their business in 2013 focused on fabrication in processing of sengon (albasia) into bare core as main material for blockboard production. The factory located in Desa Dradah Blumbang. Kecamatan Kedungpring, Kabupaten Lamongan. This research aims to make a design production development strategies at CV Alaf Denida by identifying internal and external factor of the company, analyzing alternative strategies of production development and recommending priority strategies which is used by CV Alaf Denida in developing the products. The research metode is a qualitative method with an intrinsic case study approach. The collecting data method used in this research done with observasion process, interview, and documentation. Analysis tools used for analyzing the data are IFE, EFE, SWOT, and QSPM matrix for showing the priority strategies. The validity test of this research using researcher triangulation, method, and resource data.

Methods of manufacture and innovations in steel aerosol cans’ production

The production of aerosols has had a significant position in the industry for many years. We use aerosol products almost every day for very different purposes. The aerosol industry growth very dynamically, the shapes and the materials of the containers are changing, but the main principle remains the same – “aerosol dispenser shall mean any non-reusable container made of metal, glass or plastic and containing a gas compressed, liquefied or dissolved under pressure, with or without a liquid, paste or powder, and fitted with a release device allowing the contents to be ejected as solid or liquid particles in suspension in a gas, as a foam, paste or powder or in a liquid state”. The purpose of this article is to present the methods of aerosols’ steel can manufacture together with the changes that have been made over the last century. Since the beginning of aerosol industry metal is the main material from which aerosol containers are made of, and steel is one of the most popular raw materials, the main law requirements regarding aerosol containers made of steel will be analysed. As the consequence of these analyses, the future possible development directions will be shown.

GENERAL CLASSIFICATION OF THE DOCUMENT: CHANGES AND ADDITIONS

Object, theme, purpose of work. The article is devoted to one of major problems of typology of document: general classification of document. A research purpose is to optimize the chart of general classification of document, specify some terms and offer material for a further discussion for development of typology of document. Method or methodology of realization of work. The research methodology is based on the information and communication approach, which allows to determine the features of the classification of the document, which ensure the fixation of information in the document and its transmission in society. The study is aimed at developing a general theory of the document, so take into account primarily the features inherent in all documents, regardless of their purpose. A comparative analysis of various concepts of the general classification of the document and the proposed terms and concepts is carred out. Presenting main material. The classification of the document is considered on the following blocks of facets: Types of the document on features of the information carrier; Types of the document on features of fixing of the information (creation of the document); Types of the document on sign means of fixing and transfer of the information (on a signaling component); Types of document on the possibilities of perception of information (perceptual component); Types of the document according to its information component; Types of the document according to the circumstances of the document’s existence in the external environment. The composition of the blocks has been revised; some facets have been added, others have been removed from the general document classification table. The names and definitions of certain types of documents have been clarified. Industry of application of results. Research results will be drawn in educational and practical activity in science and industries, related to information and documentation. Conclusions. As a result of research the signs on which it is necessary to carry out the general classification of the document, names and sequence of blocks from which the general multifaceted classification consists, the characteristic of separate types of the document are specified. A promising direction for the further development of the general classification of the document should be both the solution of problems inherent in this classification, and the wider popularization of already achieved results, their implementation in various fields of document science.

The Effect of Wood Type on the Reflection of a Table Tennis Ball

The table tennis game table can be made of any material with certain bounce height requirements according to ITTF regulations. Wood as the main material for the table is found in Indonesia. Various types of wood have the potential to be a dining table material. This study was conducted to determine the effect of the type of wood on the bounce of a table tennis ball. Experiments were carried out on 9 types of wood, namely hardwoods (teak, sono, coconut), medium hardwoods (meranti, plywood and jackfruit) and soft woods (waru, randu and sengon). The height of the falling ball is determined to be 30 cm for the ball's bounce recorded by the camera. The ball used is a ball with a weight of 24 grams and 30 grams. Camera recording data is processed with Kinovea 08.15 to get the reflection height. The bounce height is used as a reference for ITTF standard compliance. The initial height and reflection height were then used to calculate the coefficient of restitution (COR). Data collection was carried out 5 times and the average value was calculated. The level of wood hardness is influenced by its specific gravity. Hard wood has a relatively high specific gravity. Teak wood which is relatively hard has a specific gravity value of 0.59 – 0.82 gr/cm3