Good Air Circulation Research Articles

Passive designs of low-income housing with natural ventilation in tropical region

One of the goals of Sustainable Development goals is sustainable cities and communities. Making cities sustainable means creating career and business opportunities, safe and affordable housing, and building resilient communities and economies. One of the goals of sustainable cities and communities (SDGs 11) is by 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums. Because the level of housing needs in Jakarta is quite high with limited land available, housing prices soar, this is inversely proportional to the high level of poverty in Jakarta so that many people make illegal and slum settlements to overcome the lack of funds they have. One way to achieve this target is to apply bioclimatic architecture to realize sustainable buildings with affordable operational costs so that the housing built becomes affordable. One way to save energy is to use natural ventilation. This paper presents a study of the application of bioclimatic architecture that can provide good air circulation created using natural ventilation. Natural ventilation is the process of exchanging air inside the building through the help of open building elements. This research is motivated by the current development of cheap apartment architecture in Indonesia which does not support good natural ventilation, people are starting to build something that benefits the market and ignores the importance of good air circulation. Therefore, the promotion and application of natural ventilation as part of low-cost energy consumption and avoiding the sick building syndrome with good air circulation, especially after the corona virus pandemic, is an important issue. The research method used is descriptive quantitative method, in the form of research with a case study and simulation approach. The result achieved is that the building can optimize natural ventilation evenly through orientation, building shape, opening design, etc.

TEHNOLOGII ȘI SOLUȚII CONSTRUCTIVE PRIVIND MANAGEMENTUL INTERVALULUI DINTRE RÂNDURILE DE VIȚĂ DE VIE ȘI POMI FRUCTIFERI

The management of inter-row space of vineyards and fruit trees has emerged as an essential approach in sustainable agriculture, optimizing resource use and improving ecosystem services. This paper reviews a range of innovative technologies and solutions aimed at revolutionizing line management practices. Modern sensing and monitoring systems provide real-time data on soil moisture, nutrient levels, and plant health, facilitating precision row-to-row management. Furthermore, techniques for grassing the space between rows of vines and fruit trees are important for space management, ensuring good air circulation and facilitating agricultural activities such as maintenance and harvesting. In addition, the advent of inter-row seeding machines simplified the implementation of cover crops. These machines use advanced seed delivery mechanisms, precisely distributing the cover seed into the spaces between the rows. This not only encourages soil health and erosion prevention but also mitigates weed competition, increasing the overall resilience of the agroecosystem. The purpose of this review is to discuss the combination of state-of-the-art technologies such as 3D LIDAR technology, intelligent systems used for inter-row management of vines and fruit trees, and inter-row solar panel systems, all these examples have revolutionized inter-row management in vineyards and orchards. This holistic approach optimizes resource allocation, improves soil health, and encourages sustainable agricultural practices, paving the way for greener and more resilient inter-row spaces in modern agroecosystems.

Implementasi Pemanfaatan Sumber Radiasi Pengion pada Ruang CT Scan ditinjau berdasarkan Peraturan BAPETEN No. 4 tahun 2020 di Instalasi Radiologi Rumah Sakit type B di Wilayah Kabupaten Sumedang

Background: Occupational safety and health (OSH) management is the main factor in hospital services, which aims to control and minimize potential dangers due to radiation. One of the evaluations used is the implementation of OSH management requirements based on the Republic of Indonesia Ministry of Health Regulation No. 1014 of 2008 and Bapeten regulation no. 4 of 2020. The aim of this research was to determine the extent of implementation of OSH management in terms of completeness of management requirements, radiation protection, room design and personal protective equipment (PPE) implemented in Radiology Department in hospital type B, Sumedang Regency.Methods: This research was a descriptive qualitative by conducting direct observations, interviews and documentation.Results: The results of the research on the design of the room without ventilation outside the CT Scan room, this aims to minimize the dose of scattered radiation that comes out, decentralization and good air circulation, has warning signs and directions for radiation danger areas, the radiation protection equipment is quite complete. Implementation of radiation management has been carried out, but not completely, there is no health monitoring at the end of the work period and upon termination of work. Radiation safety verification has been carried out periodically, quality control is only carried out externally, so it does not meet standards, internal quality control cannot be carried out because there is no survey meter.Conclusions: This research was conducted in Radiology Department room in August 2023, the results showed that in the CT Scan room there was no air ventilation, there was radiation dose monitoring for staff, overall, Radiology Installation hospital type B in Sumedang Regency area had implemented occupational safety and health.

Physical Properties Of Particle-Reinforced Particle Board And Gaba Fiber Using Pvac (Polyvinyl Acetate) Filler

Traditional materials are often selected and used in the construction of houses and buildings based on local knowledge that has been tested for centuries. The use of sago leaf stalks as a building material has several advantages. They are generally easy to find in tropical areas and have natural properties that allow good air circulation, thereby helping to keep the indoor temperature cool. In addition, this material is also environmentally friendly because it can decompose properly and can be renewed naturally. In an effort to preserve these cultural and traditional values, we can take several steps. First, public education and awareness about the advantages of traditional building materials need to be improved. Organizing workshops or seminars to share knowledge about the use of traditional materials and their benefits can help increase people's appreciation of these materials. The use of sago stalks as building materials can be part of cultural conservation and environmental preservation efforts. By combining traditional knowledge with modern innovation, we can create building solutions that are environmentally friendly, sustainable and maintain our cultural heritage. By using PVAc filler, this study aims to study its effect on the physical properties of the resulting composite material. Variations in the composition of the mix will enable the identification of changes in the characteristics of the composite board and efforts to obtain optimal physical properties.

A Study of Shading Selection Strategy for Natural Ventilation of Office Buildings in Jakarta

In this post-Covid-19 pandemic, the existence of a space that is connected to outside air circulation is a necessity. This is because good air circulation can reduce the potential for the spread of Covid-19 indoors. One of the challenges in implementing natural ventilation is the entry of excess solar heat into the building. One strategy that can be done to avoid the entry of excess solar heat is to use shadows to filter sunlight. This study examined the appropriate shading strategy that can be applied to overcome the problem of excessive solar heat in the ventilation section of office buildings in Jakarta. The research will be conducted using an experimental method, Sketchup’s Pre-Design simulation. The simulation results show that Eggcrate and Automated Blinds shading are two types that can reduce harmful solar heat entering the building the highest compared to other types of shading.

Performance of Lower Ventilation Opening to Improve Air Change per Hour in Classroom at Tropical Humid Region (Case Study: Palembang City)

Fresh air circulation in a room had an impact on indoor air quality. In today’s pandemic, good fresh air circulation is one of the main strategies to prevent viruses from spreading through air molecules. A good ventilation opening design influences indoor air exchange. This research conducts a test on lower ventilation opening design that can maximize natural ventilation performance in a classroom. This test aimed at a recommendation for schools in the tropical humid region so they can hold offline learning with low virus spreads. Natural ventilation optimization should be a solution because not everyone can afford mechanical air filters or virus killers. This research used an experimental method. Computer simulation test variables were classroom openings consisting of existing openings, new outlets/openings, and lower ventilation opening. Parameters of observation are wind velocity, air circulation pattern, and air change per hour. This evaluation compares the experiment result to Air Change per Hour (ACH) threshold limit provision required in Indonesia. The result of the experiment shows outlet/opening addition provides a better impact on ACH escalation than with only existing classroom opening. And when the existing opening is closed, lower ventilation opening had good performance in achieving the ACH threshold limit provision requirements which were 9,8 ACH.

UPAYA MENJAGA KONDISI SEKOLAH YANG SEHAT UNTUK MENINGKATKAN MINAT BELAJAR SISWA KELAS III: TINJAUAN TERHADAP KESIAPAN SEKOLAH DALAM MENCIPTAKAN BUDAYA SEKOLAH SEHAT

Healthy school conditions play an important role in increasing student interest in learning. This research focuses on efforts that can be made by schools in maintaining healthy conditions, especially for third grade students. Based on the literature study, it was found that healthy schools have certain characteristics such as a clean learning environment, good air circulation, and adequate hand washing and sanitation facilities. School readiness in creating a healthy school culture can be seen from the active role of the school in educating students about the importance of health, involving parents of students in school health programs, and the involvement of school committees in monitoring and evaluation. In addition, the provision of facilities and hygiene principles is also important to be applied in order to maintain the health of students. Thus, efforts to maintain healthy school conditions can improve the quality of education and increase students' interest in learning in class III.

Radon Concentration in Urban Areas in the North and West of Morocco

Radon is a colorless, odorless radioactive gas produced by the decay of uranium and radium. It is the second cause of cancer of the lungs after smoking. It has been present in Earth's crust since the creation of Earth. Uranium-rich rocks in the deep crust are the main source of radon. Its emanation from the ground surface varies from one point to another depending on the physical characteristics of the terrain crossed as observed in this study between North and West Morocco. A dosimetric study of those emanations was performed by using the LR-115 solid-state nuclear track detector (SSNTD) which was subsequently processed by techniques developed and calibrated in the laboratory. The study revealed high concentrations of this gas in confined spaces at ground level and, in particular, in basements and less-ventilated ground floor rooms. In order to reduce these concentrations of radon and the probability of carcinogenic attacks by these accumulations of this gas, it is recommended to ventilate these premises well. Good air circulation allows the removal of this harmful gas.

Perancangan dan Analisis Aliran Udara Sistem Ducting Cloud Kitchen dengan Metode Computational Fluid Dynamics

Cloud Kitchen is a commercial kitchen that serves food for delivery or takeaway without dine-in customers. Because the cloud kitchen consists of many kitchens, good air circulation is needed. The total volume of the 15 kitchen units in the cloud kitchen is 249.8 m3, so to meet commercial kitchen standards that have a minimum Air Change per Hour (ACH) value of 30 ACH, an air change of 4410 m3/h with a ducting system is required. From the simulation results, the air velocity distribution in the ducting ranges from 0 m/s to 92.426 m/s, while the pressure distribution in the ducting ranges from -578.824 Pa to 11639.58 Pa, and the distribution of air temperature in the ducting ranges from 49.8°C to 65.167°C. The chosen exhaust fan is a CKE brand centrifugal fan with type CKE DGB-4.5#-NO and an exhaust capacity of 5712–10562 m3/h.

Analysis Of Thermal Comfort In L 609 Classroom By Using SST k-ꞷ Turbulence Model

In today's era, more and more people spend most of their time indoors, with artificial climatic conditions, where thermal comfort is a basic factor such as a glazing system (ventilation), both for dimensions and material characteristics, this basic factor is very important because it affects the parameters involved in thermal comfort. One of the requirements for thermal comfort is good air circulation, good air circulation can also prevent the spread of the COVID-19 virus that is currently engulfing the world.Therefore, research is needed to analyze the air flow engineering in the room, especially the classroom to get results that will later be seen whether it has met the demands of room comfort, especially thermal comfort. The purpose of this study is to provide recommendations for the configuration of air circulation in the L609 classroom and perform a CFD analysis on air circulation in the classroom which can create thermal comfort. Based on all the simulation results carried out with 2 outlet configurations and 5 different speed fan configurations, the obtained results are in accordance with the ASHRAE 55 standard in 2020 only in the first configuration with a speed of 0.79 m/s. in the second configuration all the simulation results obtained are not in accordance with the thermal comfort limit according to ASHRAE 55 in 2020 because the speed obtained is more than 0.8 m/s and the temperature obtained is more than 297 K. Considering the COVID-19 pandemic, there must be circulation air in order to break down the aerosol concentration of the COVID-19 virus itself. Therefore, the author recommends using a classroom configuration with an open door so that air circulation can flow properly.

SCHOOL LIBRARY SERVICES AT UPT SMA NEGERI 5 ENREKANG DURING THE PANDEMIC PERIOD

The purpose of this study was to determine library services in this case circulation services, reference services, on-site reading services and ICT-based services as well as supporting and inhibiting factors in school library services. This research approach is qualitative with a type of description. Data collection techniques were carried out by interview, observation and documentations. Data analysis techniques using data reduction, data presentation and drawing conclusions. Checking the validity of the data is done by trianggulation technique. The reserch results showed that : 1) the circulation service has a collection of 19,839 books, but does not yet have a non-book collection such as tape recorders, sound slides, video cassettes, sound films and many more. The system used in this library is an open service system. 2) The reference service has 587 collections consisting of dictionaries, encyclopedias, maps and others. In this service, users can obtain information and assistance regarding the existence of the collection needed. 3) on-site reading services, in this service the library provides 6 reading tebles placed in several corners of the room so that students get good lighting and air circulation. Howefer, this service is currently unvailable because students rarely use it. 4) ICT-based services, in the SMA Negeri 5 Enrekang library this service is not yet available because officers are still in the stage of entering library materials into the library application. While the supporting factors for library services are the personnel or the staff themselves, staff commitment and adequate books. While the inhibiting factors are the library collections which are still in hard copy form, lack of student interest and limited staff/librarians.

Pengaruh konversi mesin genset 160 cc berbahan bakar bensin dengan converter kit liquefied petroleum gas terhadap emisi gas buang

Usability of portable generators fueled by petroleum as a substitute for the community's primary source of electrical energy when the main electricity source black out is still the best choice for the community, limited space for good air circulation will make emissions harmful to users or community, innovation is needed to reduce the levels of exhaust emissions produced by saving fuel or converting the fuel used, one of which is by replacing the carburetor in portable generators fuel engine with a converter kit using Liquified Petroleum Gas (LPG). In this study, the lowest use of petroleum fuel was obtained at 36.3 ml/minute or 0.406 liters/hour, consumption of LPG fuel is 0.159 liters/hour, exhaust emission test results obtained at 5.3% CO emissions from petroleum fuel and 125 ppm for HC fuel oil emissions, compared to the results of LPG CO exhaust emission tests. of 0.90% and fuel HC emissions ar LPG of 41 ppm, the use of LPG fuel in Portable Generators with a converter kit has the effect of using more efficient fuel and very low fuel emissions.

Influence Analysis of Competence, Service Quality and Work Environment on Employee Performance with Motivation as an Intervening Variable in the Personnel and Human Resources Development Agency (BKPSDM) Batu City

The purpose of this study is to describe the impact of competence, quality of service, and work environment on employee performance with motivation as an intervening variable. Several analytical techniques were performed in this study and the analyzes were performed using his SEM data analysis technique using his AMOS application. Descriptive results for competency variables are consistent with the presence of traits in paying attention to employee autonomy in coping with stress, solving work problems, and working overtime. Skills to complete tasks and responsibilities are also approved by employees, and skills with employee confidence, expertise, and communication skills are also approved by Batu City BKPSDM employees. Different service quality pays average attention to reliability, responsiveness, courtesy and reliability, approved by her BKPSDM staff in Batu City to provide the best service in fulfilling duties and responsibilities to do. The physical and psychological work environment is also very influential in determining the performance of BKPSDM employees. This includes lighting work areas, providing good air circulation, avoiding conflicts between employees, and ensuring protection and safety from authorities. Performance variable success is also due to aspects of collaboration, responsibility, and goal attainment, while motivation variable success is done by considering motivations, expectations, and incentives. This is also endorsed by all employees of BKPSDM K Batu City i.e. competence. , Service quality and working environment can improve performance through motivation in BKPSDM Batu City. Competence, quality of service, and working environment have a significant impact on the performance of the Human Resources and Human Resources Development Board (BKPSDM) Batu City employees

Burnout Levels In Covid-19 Patients Undergoing Self Isolation In The Work Area Of Puskesmas Bangkala, Makassar

Patients who are positive for Covid-19 will be isolated for 10 days in the hospital or isolated independently at home if their condition is fine and without severe symptoms. Isolated for 10 days can make patients feel bored because of restricted access. Stress can be caused by many factors such as excessive worry about physical conditions, feelings of anxiety because they can't get together with family or feeling bored because of the treatment being undertaken. This study is a descriptive study with a survey method to describe the level of burnout in Covid-19 patients undergoing self-isolation in the work area of ​​the Puskesmas Bangkala. In this study, data were collected from 30 respondents using a questionnaire. The results showed that the burnout level for Covid-19 patients who underwent self-isolation in the work area of ​​the Puskesmas Bangkala mostly experienced a medium burnout level of 50%. For covid-19 patients so as not to experience burnout while undergoing self-isolation, it is better to do fun things for yourself, pray a lot to calm the mind, filter out true news about the covid-19 disease, continue to comply with health protocols, maintain good air circulation. both in isolation, exercise regularly, and always check the temperature and oxygen saturation.

The Effect of Orientation and Material On Thermal Comfort In Museum Perkebunan Indonesia Building

Thermal comfort is something that must be considered in a building to create comfort for its users. One of the factors that influence thermal conditions is the orientation of the building towards the sun and building materials. The Museum Perkebunan Indonesia is one of the famous and oldest museums in Medan, Indonesia. Besides that, the museum still has the dutch colonial architecture style, which is mostly known as a building with good air circulation because of the amount of ventilation and window they have. Based on that, this study aims to measure the thermal comfort of each room with a different orientation in Museum Perkebunan Indonesia and then to examine the effect of thermal comfort in Museum Perkebunan Indonesia. Moreover, the study also discusses the material used in Museum Perkebunan Indonesia building. The methodology of this study is qualitative-descriptive by solving the existing problems based on quantitative data that is done by the measurement of air temperature that was carried out for six different days, starting from morning to evening. Furthermore, the study also analyses and describes the object research. The analysis itself shows that the orientation effect has a significant effect compared to the influence of building materials on the museum building. And the result of the analysis shows that Museum Perkebunan Indonesia Building falls into the uncomfortable category according to the Standard Procedure for Planning Energy Conservation in Buildings.

“Operating Room Effectiveness”: Phenomenological Qualitative Study In Hospital

This study investigates the experience of health and medical personnel in hospital operating rooms and to evaluate the effectiveness of activities in operating rooms and ventilation conditions in hospitals. This study was designed as a qualitative research based on Heidegger's Hermeneutic Phenomenology Approach. The research method was carried out on health and medical personnel working in the operating room (OR) as observers. The research data were collected using an open and unstructured interview form. This form includes items that question the operating room design and operating room ventilation conditions. Data analysis used the Miles & Huberman method with the stages of data reduction, data display, and conclusion or verification. The research findings were obtained from seven informants (health and medical personnel) consisting of three men and four women. Age ranged from 30 to 45 years. Two themes and twelve sub-themes were determined as a result of data analysis. The research themes are (1) the effectiveness of operating room layout and (2) the effectiveness of operating room ventilation. This study concludes and provides important information about the physical requirements of the hospital operating room and the effectiveness for working professionally experience workers in the operating room (OR). It is understood that the room layout in the hospital is very good in helping smooth preoperative and postoperative handling. And operating room ventilation already supports good air circulation and is easy to control its use. But still found another room that causes noise. Hospital management must consider the type of activity, use of equipment, and/or other sources of noise, whether in the operating room building, ventilation of the operating room without a positive pressure system. So, the hospital must be able to pay attention to air humidity and pay attention to the state of the ventilation system and air filtration in the operating room so as to reduce the risk of preoperative and postoperative wound infections.

Preferensi Mahasiswa terhadap Desain Kantin yang Ideal Pascapandemi Covid-19

<p class="Abstract"><em><span lang="EN-GB">This reserach was conducted to explore student preferences to formulate the ideal canteen design criteria in this post-pandemic period. The analytical method used in this study is a content analysis method with the stages of open coding, axial coding, and selective coding through the data obtained using an online questionnaire. Based on the analysis, it was found that the dominant factors that became student preferences for the ideal post-pandemic canteen design criteria were "cleanliness and health" and "spacious room". Several things that can be considered to support these criteria are the availability of hygiene and health facilities, smoke-free rooms (cooking and smoking), additional signage, distance between furniture and visitors, additional barriers, consideration of space capacity, good air circulation, and open design.</span></em><em></em></p>

Factors Influencing Changes in Consumer Behavior in Choosing Coffee Outlets in Jakarta During the Covid-19 Pandemic

This study aims to determine the perception of health risks, innovation capabilities, and coffee shop atmosphere on changes in consumer behavior during the Covid-19 pandemic. This study uses a descriptive quantitative approach. The number of samples is 100 respondents, and the sampling technique is purposive sampling—data collection techniques using online questionnaires. The research locations were in five coffee shops: Tak Kie Coffee, Sun Ho Coffee, Djie Coffee, Bakoel Koffie Coffee, and Gondangdia Luwak Coffee. The results showed that the perception of health risks and the atmosphere of the coffee shop had a significant positive effect on changes in consumer behavior. In contrast, innovation capability harms changes in consumer behavior. The dominant result is the atmosphere of the coffee shop, which has a t-count that is greater, 7.259, than the t-table of 1.960 and a significant value is 0.000. This is because coffee shops carry out health protocols such as distance restrictions, maintaining cleanliness, good air circulation, and the availability of outdoor facilities. Coffee shops should maintain health protocols, and visitors should be limited so that consumers can feel safe and comfortable. They should also be able to make coffee while traditionally not selling coffee online so that the aroma and taste are maintained properly and do not change from the original.

Prototype Sistem Pendeteksi dan Penetralisir Asap Rokok pada Ruangan dengan Fitur Monitoring Suhu dan Kelembaban

This research was conducted with the aim of detecting and neutralizing cigarette smoke in a room using a messaging application—in this term is Telegram as notification to the user. The system is also equipped with room temperature and humidity monitoring features. In a room that is exposed to cigarette smoke does not have good air circulation, it will cause cigarette smoke not to come out quickly, this problem which will interfere with health, because of the smoke that is inhaled. In this case, we need a system that can detect and neutralize cigarette smoke. For cigarette smoke detection using the MQ-7 sensor, the DC fan and Ozone Generator will automatically turn on if the value on the MQ-7 sensor is greater than or equal to 74 Ppm and the system will also send a notification via Telegram that cigarette smoke is detected. This serves to neutralize air contaminated with cigarette smoke in the room. To monitor room temperature and humidity using the DHT11 sensor and the results of room temperature and humidity monitoring will be displayed on the mobile application.

PENGABDIAN MASYARAKAT PENYULUHAN TENTANG RUMAH SEHAT KELURAHAN TANJUNG RHU PEKANBARU

Definition of House (BP Guide) In general, the notion of a house is a building which is a place to live to get protection from all the natural conditions that surround it, such as rain, hot sun, and so on. A healthy house must have good air circulation, adequate lighting, clean water, proper disposal of waste water, and moisture-free floors and walls. The house must also meet psychological needs, namely comfort and good communication between family members. In the Bantargedang Kersanegara Tasikmalaya area, there are still houses that do not have proper toilets and waste management that is not well organized. so that with these conditions there will be risk factors that can cause various types of diseases. Through community service we conduct health education about healthy homes. It is hoped that this health counseling activity will provide benefits, namely providing increased knowledge and understanding to the community in the RT 04/RW 09 Bantargedang Kersanegara Cibeureum area, Tasikmalaya Regency, regarding healthy homes where people can feel comfortable and increase their productivity