Alat Penurun Emisi Gas Buang Pada Motor, Mobil, Motor Tempel Dan Mesin Pembakaran Tak Bergerak

Emission gas reducer on motor vehicle, automobile, light engine of boat and stationary combustion engine. The use of motor vehicle should be followed by protection against damages on the environment, since the exhaust gas from combustion engine has significantly affect on air and environmental pollution. One method to solve the problems in air pollution has been done by using a re-heater designed in Mechanical Engineering Department, University of Udayana. In accordance to the test on the re-heater, it can be seen very clear that the re-heater has significantly reduce the CO emission of about 54%. It also reduces the CO2 dan HC emission, and in the other side increases the number of O2. The re-heater has no significant effect to engine performance during the operation and also reduces the noise of motor

Metode Transfer Pengetahuan Pada Perusahaan Keluarga Di Indonesia

This study aims to explore the intergenerational knowledge transfer mechanism in family frms. Using the case study method, this qualitative research examines 14 family frms. Data were obtained through semi-structured inter views with participants, and then analyzed by using content analysis. Visual mapping and temporal bracketing techniques were also used for data analysis. Data source triangulation and member checking methods were utilized to test the validity and reliability of the data. The fndings show that interpersonal relationship between the predecessor (parents) and the successor (children) is needed in the knowledge transfer process. The physical presence of the predecessor and the direct involvement of the successor in the business are two important elements in the knowledge transfer process, wherein the successor obtains information from inside and outside the frm. The intergenerational knowledge transfer process allows the successor to get real experiences and to run their own experiments. Learning-by-doing is a knowledge transfer method that is commonly used in family firms

Kajian Termis Pada Beberapa Material Dinding Untuk Ruang Bawah Tanah

. Karena terbatasnya lahan yang tersedia di kodya Denpasar, pembangunan ruang bawah tanah khususnya pusat perbelanjaan dan perkantoran dewasa ini telah semakin meluas. Banyak bangunan komersial yang kini telah memiliki ruang bawah tanah, namun karena perencanaan pengkondisian udaranya yang kurang baik, menyebabkan kurang optimalnya penggunaan ruang bawah tanah tersebut untuk aktivitas dan egiatan manusia.Penelitian ini bertujuan untuk membandingkan besarnya pertukaran panas pada dinding bangunan di bawah tanah. Pertukaran panas tersebut selanjutnya dipergunakan untuk mengetahui tingkat Kenyamanan termis dari penghuni dengan jalan menghitung laju metabolisme tubuh manusia. Material selubung bangunan yang baik adalah material yang mampu mempertukarkan kalor sekecil – kecilnya serta menghasilkan laju metabolisme tubuh yang serendah – rendahnya. Dalam penelitian ini akan diuji beberapa kombinasi material dinding bangunan agar mampu memenuhi kriteria tersebut. Kajian terhadap kombinasi material ini untuk mencari susunan terbaik dari material penyusun selubung bangunan. Ditemukan bahwa kombinasi semen dan pasir, batu bata dan batu palimanan memberikan pertukaran panas terkecil dan Kenyamanan termis terbaik bagi metabolisme tubuh.Abstract. Due to the land limitation in Denpasar area, development of underground especially for shopping malls and offices was growth rapidly. Most commercial buildings have underground area, but the failure on the design of air conditioning system caused the un-optimize of underground area for activity and human living. This research aims to compare the heat transfer rate on the wall of underground buildings. The heat transfer rate is used to understand the thermal comfort level of occupants by taking into account the human metabolic rate. The best material of buildings envelope must be able to transfer the smallest heat between the room to its surrounding and produce the smallest metabolic rate of occupants. This research compares several kinds of material in order to find those criteria. It found that combination of cement, brick and palimanan stone have been able to produce the smallest heat transfer rate and metabolic rate of occupants.AbstrakKarena terbatasnya lahan yang tersedia di kodya Denpasar, pembangunan ruang bawah tanah khususnya pusatperbelanjaan dan perkantoran dewasa ini telah semakin meluas. Banyak bangunan komersial yang kini telahmemiliki ruang bawah tanah, namun karena perencanaan pengkondisian udaranya yang kurang baik, menyebabkankurang optimalnya penggunaan ruang bawah tanah tersebut untuk aktivitas dan kegiatan manusia.Penelitian ini bertujuan untuk membandingkan besarnya pertukaran panas pada dinding bangunan di bawahtanah. Pertukaran panas tersebut selanjutnya dipergunakan untuk mengetahui tingkat Kenyamanan termis daripenghuni dengan jalan menghitung laju metabolisme tubuh manusia. Material selubung bangunan yang baikadalah material yang mampu mempertukarkan kalor sekecil – kecilnya serta menghasilkan laju metabolismetubuh yang serendah – rendahnya. Dalam penelitian ini akan diuji beberapa kombinasi material dinding bangunanagar mampu memenuhi kriteria tersebut. Kajian terhadap kombinasi material ini untuk mencari susunanterbaik dari material penyusun selubung bangunan. Ditemukan bahwa kombinasi semen dan pasir, batu batadan batu palimanan memberikan pertukaran panas terkecil dan Kenyamanan termis terbaik bagi metabolismetubuh.AbstractDue to the land limitation in Denpasar area, development of underground especially for shopping malls and officeswas growth rapidly. Most commercial buildings have underground area, but the failure on the design of airconditioning system caused the un-optimize of underground area for activity and human living. This researchaims to compare the heat transfer rate on the wall of underground buildings. The heat transfer rate is used tounderstand the thermal comfort level of occupants by taking into account the human metabolic rate. The bestmaterial of buildings envelope must be able to transfer the smallest heat between the room to its surroundingand produce the smallest metabolic rate of occupants. This research compares several kinds of material in orderto find those criteria. It found that combination of cement, brick and palimanan stone have been able to producethe smallest heat transfer rate and metabolic rate of occupants

Analysis of SQL Injection Attacks on Website Service

Among the various types of software vulnerabilities, command injection is the most common type of threat in web applications. In command injection, SQL injection type of attacks areextremely prevalent, and ranked as the second most common form of attack on web. SQL injection attacks involve the construction of application\u27s input data that will result in the execution of Malicious SQL statements. Most of the SQL injection detection techniques involve the code to be written along with the actual scripting code. These techniques do not detect errors in SQL statements. Hence, this paper proposes a mechanism to identify invalid SQL statements, to analyze the query for invalid non SQL key words, and to customize the captured errors. This mechanism is different from others by means of separation of the main scripting code and SQL injection code

Alat Penurun Emisi Gas Buang Pada Motor, Mobil, Motor Tempel Dan Mesin Pembakaran Tak Bergerak

Emission gas reducer on motor vehicle, automobile, light engine of boat and stationary combustion engine. The use of motor vehicle should be followed by protection against damages on the environment, since the exhaust gas from combustion engine has significantly affect on air and environmental pollution. One method to solve the problems in air pollution has been done by using a re-heater designed in Mechanical Engineering Department, University of Udayana. In accordance to the test on the re-heater, it can be seen very clear that the re-heater has significantly reduce the CO emission of about 54%. It also reduces the CO2 dan HC emission, and in the other side increases the number of O2. The re-heater has no significant effect to engine performance during the operation and also reduces the noise of motor

Investigation Of Airflow And Heat Transfer Around A Cubic Building

ABSTRAK Due to rapid urban development accompanied by the increase of artificial heat release in urban and rural areas, the investigation of heat transfer and airflow around a cluster of buildings was studied by using a standard k-E turbulence model combined with multi-block grids and adopting low fluctuating velocities. A combination of low fluctuating velocity components and Van Leer schemes reduces the over-estimation of the production term of the turbulent kinetic energy in standard k-E turbulence models and the number of iterations, reducing the CPU time. It is shown that the pressure distribution at the windward corner of a cubic building is minimised by using this model. Keywords: airflow, heat transfe

Novel heat-flux scaling for convection at low winds

An analysis of atmospheric observational data indicates that the conventionally defined drag and heat transfer coefficients increase rapidly as wind speed falls. It is shown here that, at low winds, (i) there is a linear increase of drag with wind speed and (ii) the observed heat flux is independent of wind speed. These findings are not consistent with the so-called free-convection limit of Monin-Obukhov theory. They are instead best seen as the result of a new regime of 'weakly forced convection', in which the heat flux is determined solely by temperature differentials as in free convection, and the momentum flux by a perturbation linear in wind on free convection. This regime is governed by a new velocity scale determined by the heat flux (rather than by the friction velocity as in classical turbulent boundary layer theory). Novel definitions of the drag and heat exchange coefficients, based on appropriate heat-flux velocity scales, are found to be independent of wind speed at low winds. The height of the capping inversion in this regime is proportional to the surface heat flux, and is determined by a simple argument balancing energy supply at surface to rate of work done to lift air parcels to inversion height

Investigation of Thermal Environment on Traditional Balinese Buidings

Air conditioning is one of the most important factors that determine human comfort, especially in a hot and humid climate. The development of housing complex tends to increase in this decade, but the thermal environment and human response have not yet been analyzed reiv well. The aim of air conditioning in traditional Balinese houses is to create a compliable. healthy and stable thermal condition since some traditional Balinese buildings may not be suitable for inhabitants health and are passible to create several diseases, although less energy consuming. The improvisation of air conditioning systems in traditional Balinese houses by using passive thermal design is needed. especially when people considering energy saving. This paper trill describe the improvisation of air conditioning system by passive design in order to contribute mare effective control of the elll\u27ir011111e111, to improve the relationship between the artificial environment and ⢠Minion beeingS, and perhaps Can be used to developing the standard code of building design in Bali. Keywords Air conditioning. heat transferand traditional buildin