Fahreza Ramadhan - Academia.edu (original) (raw)
Uploads
Papers by Fahreza Ramadhan
Seminar Nasional Teknik Elektro, Jan 5, 2021
An exploratory and inventory research was conducted to document the species of plant diversity in... more An exploratory and inventory research was conducted to document the species of plant diversity in the school area for the purpose of environmental education and conservation. The research location is in the area of MAN 4, South Jakarta. Exploration was carried out by purposive sampling, taking all types of plants encountered herbs and trees. Data analysis was made by explaining the exploration data descriptively. Based on the research, found 43 species of plants, consisting of 40 types of spermatophytes and 3 types of pteridophytes. The plants with the highest frequency were Syzygium oleana and Codiaeum variegatum which were used as garden fences and garden ornaments. ornamental plants, some food, medicine and as an air purifier. Species description, can be used as a reference source for learning biology material or practical activity on biodiversity, LO 4.3 composes a cladogram based on the principles of classification of living things (for national curriculum) and LO 18.1.1 discus...
ELECTRICES, Jun 3, 2021
The amount of ingredients in mixing bartender drinks is generally based on the feeling or experie... more The amount of ingredients in mixing bartender drinks is generally based on the feeling or experience of the bartender. This makes it difficult for novice bartenders who have no experience in mixing drinks. So we made a Smart Bartender Machine to support the needs of the bartender in mixing drinks faster with accurate measurements. This machine uses an Arduino ATmega 2560 microcontroller as a controller. Programming input and output operations using Arduino IDE Software with C programming language. The system works automatically to control mechanical and electronic equipment so that it can replace the human role in decision making. This machine is also equipped with software that can be accessed via a smartphone using Bluetooth HC-05. In this machine there are six bottles filled with drinks. This drink can be combined with other drinks to produce a recipe with a distinctive taste. Analysis of the performance of this system was tested through relay testing, volume accuracy testing, and testing the quality of drinks produced by the machine. The test results show that this machine can work according to the description, while the total average for the percentage error to the resulting volume is 1.51% with an average total water flow of 28.62 ml/s, a good distance of connectivity via Bluetooth is 1-20 m.
Energies, 2022
In this paper, the use of HVAC systems and non-HVAC control measures to reduce virus-laden bioaer... more In this paper, the use of HVAC systems and non-HVAC control measures to reduce virus-laden bioaerosol exposure in a highly occupied indoor space is investigated. A simulation tool was used to model the fate and transport of bioaerosols in an indoor space in the hotel industry (bar or pub) with three types of HVAC system (central air handling system (CAHS), dedicated outdoor air system (DOAS), and wall unit system (WUS)). Non-HVAC control measures such as portable air cleaners (PAC) and local exhaust fans were considered. Occupant exposure was evaluated for 1 μm bioaerosols, which transport SARS-CoV-2, for 3 h/day of continuous source and exposure. The combined effects of ventilation (400 l/s of outdoor air), recirculated air filtration (90% efficacy), and a PAC with a capacity up to 900 m3/h mitigated the (normalized) integrated exposure of the occupant by 0.66 to 0.51 (CAHS) and 0.43 to 0.36 (DOAS). In the case of WUS, the normalized integrated exposure was reduced by up to 0.2 whe...
PT BMC harus selalu mengontrol waku penyetoran ke bank persepsi atau kantor pos, keterlambatan pe... more PT BMC harus selalu mengontrol waku penyetoran ke bank persepsi atau kantor pos, keterlambatan penyetoran telah terjadi di bulan Desember tahun 2018. Agar terhindar dari sanksi maka PT BMC harus melakukan penyetoran sebelum tanggal terakhir jatuh tempo. PT BMC juga harus mengontrol waktu pelaporan SPT. Agar terhindar dari sanksi administrasi PT BMC harus melaporkan SPT sebelum batas akhir pelaporan
The purpose of this study is to: 1) examine the differences in the ability to solve PISA-oriented... more The purpose of this study is to: 1) examine the differences in the ability to solve PISA-oriented math questions space and shape content in terms of gender. 2) analyzing students' reasoning abilities in: a) presenting mathematical statements in writing and images viewed from gender. b) manipulate data in terms of gender. c) examine the validity of an argument in terms of gender. d) in examining the validity of an argument in terms of gender. This type of research uses the mix method research method. Data collection techniques using test, documentation, observation, and interview methods. The data analysis technique uses the T-test and flow model. The results of the study: 1) there was no difference in the ability to solve mathematical questions between male students and female students. 2) high-capable male and female students have met the first indicator. Whereas male and female students with moderate abilities are still lacking in fulfilling the first indicator. For low-abilit...
Dalam penyaluran energi listrik pada jaringan transmisi, terdapat transformator yang berfungsi me... more Dalam penyaluran energi listrik pada jaringan transmisi, terdapat transformator yang berfungsi menaikkan ataupun menurunkan tegangan dengan nilai frekuensi yang sama. Sehingga pasokan energi listrik yang dihasilkan oleh pembangkit listrik yang berada jauh sekalipun dapat disalurkan dan dirasakan oleh masyarakat baik itu kalangan industri ataupun perumahan. Terlepas dari semua itu, transformator juga harus dipelihara dan diperhatikan setiap waktu agar mencegah timbulnya gangguan. Di dalam transformator terdapat minyak transformator yang berfungsi sebagai tahanan isolasi serta pendingin gulungan primer dan sekunder. Minyak transformator juga harus dipelihara setiap waktu, faktanya minyak transformator mengandung senyawa hidrokarbon, dimana senyawa tersebut akan terurai menjadi gas yang terlarut didalam minyak apabila terjadi ketidaknormalan seperti overheating, corona ataupun arching . Gas inilah yang dapat menyebabkan transformator tidak dapat bekerja secara optimal. penelitian ini d...
THE 5TH INTERNATIONAL TROPICAL RENEWABLE ENERGY CONFERENCE (THE 5TH iTREC), 2021
Seminar Nasional Teknik Elektro, Jan 5, 2021
An exploratory and inventory research was conducted to document the species of plant diversity in... more An exploratory and inventory research was conducted to document the species of plant diversity in the school area for the purpose of environmental education and conservation. The research location is in the area of MAN 4, South Jakarta. Exploration was carried out by purposive sampling, taking all types of plants encountered herbs and trees. Data analysis was made by explaining the exploration data descriptively. Based on the research, found 43 species of plants, consisting of 40 types of spermatophytes and 3 types of pteridophytes. The plants with the highest frequency were Syzygium oleana and Codiaeum variegatum which were used as garden fences and garden ornaments. ornamental plants, some food, medicine and as an air purifier. Species description, can be used as a reference source for learning biology material or practical activity on biodiversity, LO 4.3 composes a cladogram based on the principles of classification of living things (for national curriculum) and LO 18.1.1 discus...
ELECTRICES, Jun 3, 2021
The amount of ingredients in mixing bartender drinks is generally based on the feeling or experie... more The amount of ingredients in mixing bartender drinks is generally based on the feeling or experience of the bartender. This makes it difficult for novice bartenders who have no experience in mixing drinks. So we made a Smart Bartender Machine to support the needs of the bartender in mixing drinks faster with accurate measurements. This machine uses an Arduino ATmega 2560 microcontroller as a controller. Programming input and output operations using Arduino IDE Software with C programming language. The system works automatically to control mechanical and electronic equipment so that it can replace the human role in decision making. This machine is also equipped with software that can be accessed via a smartphone using Bluetooth HC-05. In this machine there are six bottles filled with drinks. This drink can be combined with other drinks to produce a recipe with a distinctive taste. Analysis of the performance of this system was tested through relay testing, volume accuracy testing, and testing the quality of drinks produced by the machine. The test results show that this machine can work according to the description, while the total average for the percentage error to the resulting volume is 1.51% with an average total water flow of 28.62 ml/s, a good distance of connectivity via Bluetooth is 1-20 m.
Energies, 2022
In this paper, the use of HVAC systems and non-HVAC control measures to reduce virus-laden bioaer... more In this paper, the use of HVAC systems and non-HVAC control measures to reduce virus-laden bioaerosol exposure in a highly occupied indoor space is investigated. A simulation tool was used to model the fate and transport of bioaerosols in an indoor space in the hotel industry (bar or pub) with three types of HVAC system (central air handling system (CAHS), dedicated outdoor air system (DOAS), and wall unit system (WUS)). Non-HVAC control measures such as portable air cleaners (PAC) and local exhaust fans were considered. Occupant exposure was evaluated for 1 μm bioaerosols, which transport SARS-CoV-2, for 3 h/day of continuous source and exposure. The combined effects of ventilation (400 l/s of outdoor air), recirculated air filtration (90% efficacy), and a PAC with a capacity up to 900 m3/h mitigated the (normalized) integrated exposure of the occupant by 0.66 to 0.51 (CAHS) and 0.43 to 0.36 (DOAS). In the case of WUS, the normalized integrated exposure was reduced by up to 0.2 whe...
PT BMC harus selalu mengontrol waku penyetoran ke bank persepsi atau kantor pos, keterlambatan pe... more PT BMC harus selalu mengontrol waku penyetoran ke bank persepsi atau kantor pos, keterlambatan penyetoran telah terjadi di bulan Desember tahun 2018. Agar terhindar dari sanksi maka PT BMC harus melakukan penyetoran sebelum tanggal terakhir jatuh tempo. PT BMC juga harus mengontrol waktu pelaporan SPT. Agar terhindar dari sanksi administrasi PT BMC harus melaporkan SPT sebelum batas akhir pelaporan
The purpose of this study is to: 1) examine the differences in the ability to solve PISA-oriented... more The purpose of this study is to: 1) examine the differences in the ability to solve PISA-oriented math questions space and shape content in terms of gender. 2) analyzing students' reasoning abilities in: a) presenting mathematical statements in writing and images viewed from gender. b) manipulate data in terms of gender. c) examine the validity of an argument in terms of gender. d) in examining the validity of an argument in terms of gender. This type of research uses the mix method research method. Data collection techniques using test, documentation, observation, and interview methods. The data analysis technique uses the T-test and flow model. The results of the study: 1) there was no difference in the ability to solve mathematical questions between male students and female students. 2) high-capable male and female students have met the first indicator. Whereas male and female students with moderate abilities are still lacking in fulfilling the first indicator. For low-abilit...
Dalam penyaluran energi listrik pada jaringan transmisi, terdapat transformator yang berfungsi me... more Dalam penyaluran energi listrik pada jaringan transmisi, terdapat transformator yang berfungsi menaikkan ataupun menurunkan tegangan dengan nilai frekuensi yang sama. Sehingga pasokan energi listrik yang dihasilkan oleh pembangkit listrik yang berada jauh sekalipun dapat disalurkan dan dirasakan oleh masyarakat baik itu kalangan industri ataupun perumahan. Terlepas dari semua itu, transformator juga harus dipelihara dan diperhatikan setiap waktu agar mencegah timbulnya gangguan. Di dalam transformator terdapat minyak transformator yang berfungsi sebagai tahanan isolasi serta pendingin gulungan primer dan sekunder. Minyak transformator juga harus dipelihara setiap waktu, faktanya minyak transformator mengandung senyawa hidrokarbon, dimana senyawa tersebut akan terurai menjadi gas yang terlarut didalam minyak apabila terjadi ketidaknormalan seperti overheating, corona ataupun arching . Gas inilah yang dapat menyebabkan transformator tidak dapat bekerja secara optimal. penelitian ini d...
THE 5TH INTERNATIONAL TROPICAL RENEWABLE ENERGY CONFERENCE (THE 5TH iTREC), 2021