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Enny Enny
PSD III Teknik Elektro
Humanities Computer Science & IT Public Health Social Sciences

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EFFEK SAMPING PENGGUNAAN PONSEL Enny, Enny
Gema Teknologi Vol 17, No 4 (2014): October 2013 - April 2014
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (294.527 KB) | DOI: 10.14710/gt.v17i4.8938

Abstract

Enny, in this paper explain that many mobile phone users around the us, but only a portion of the concerned about the dangers of cell phones. This paper was compiled to determine the impact and solutions of cell phone radiation. Mobile phones emit electromagnetic waves which will affect the surrounding environment. Based on existing information, cell phone radiation is thought to cause cancer. Waves emitted from mobile phones over the air is causing electromagnetic radiation. Potential disrubtion of health consequences of radiation electromagnetic field has become an issue which examined till now, so found a variety of health disorders as a result of mobile phone users that includes the impact of mild and severe impact. Experts have discovered some efforts to minimize the effects of cell phone radiation on health of mobile phone users. Every user should know the dangers of mobile phone users. Radiation caused cell phone not only arise when used, but when putting a cell phone in your Pocket can also be exposed to any radiation. Therefore, mobile users need to know how to use a cell phone. Users should pay attention to the level of radiation caused by cell phones, so that the influence of electromagnetic radiation on health can be scaled down for mobile users. Keywords: side effects of cell phone use
Tachometer Laser , Pemakaian Dan Perawatannya Enny, Enny
METANA Vol 13, No 1 (2017): Juni 2017
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1021.34 KB) | DOI: 10.14710/metana.v13i1.12578

Abstract

Alat Tachometer adalah sebuah alat yang digunakan untuk pengujian yang dirancang untuk mengukur kecepatan rotasi dari sebuah objek, seperti alat pengukur dalam sebuah Motor listrik   yang mengukur   putaran per menit (RPM)  dari poros engkol motor. Alat tachometer laser adalah alat yang dapat melakukan pengukuran dari jarak jauh yaitu bekerja dengan sensor cahaya yang sangat sensitip terhadap  elemen berputar. Maka dari itu alat harus dirawat dan diperbaiki secara teratur.  apabila ada kerusakan. Kegiatan perawatan yang dilakukan adalah perawatan pencegahan dan pemeliharan kerusakan. Sehingga alat tachometer dapat digunakan secara maksimal sesuai dengan instruksinya pemakaian alat tersebut.Dengan adanya perawatan dan pemakaian yang tepat diharapkan bahwa alat tachometer laser agar dapat berfungsi dengan baik dalam waktu yang lama. Laser Tachometer, Use and Maintenance The Tachometer Tool is a device used for testing designed to measure the rotational speed of an object, such as a measuring device in an electric motor that measures per minute rotation (RPM) of the motor crankshaft. The laser tachometer tool is a device that can perform measurements from a distance that is working with sensors of light that is very sensitive to the rotating elements. Therefore the tools must be maintained and repaired regularly. If there is damage, the maintenance activities carried out are preventive maintenance and maintenance of damage. So that tachometer tool can be used maximally in accordance with the instruction of using the tool. With proper maintenance and usage it is expected that laser tachometer tool to function well in a long time.
Optimalisasi Penggunaan Alat Praktikum Power Supply Switching dengan Menggunakan Topologi Half Bridge Konverter sebagai Alat Bantu Praktikum Elektronika Analog Enny, Enny
METANA Vol 12, No 1 (2016): Juni 2016
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1246.587 KB) | DOI: 10.14710/metana.v12i1.17509

Abstract

Power supply merupakan perangkat keras yang mampu menyuplai tenaga atau tegangan listrik secara langsung dari sumber tegangan listrik ke tegangan listrik yang lainnya. Power supply memiliki input dari tegangan yang berarus alternating current (AC) dan mengubahnya menjadi arus direct current (DC) yang nantinya digunakan untuk mensuplai peralatan elektronik yang membutuhkan arus searah. Power supply terbagi menjadi dua yaitu power supply linear dan power supply switching. Pada power supply switching yang akan dioptimalkan dalam penggunaannya menggunakan topologi half bridge konverter. Topologi half bridge konverter memiliki beberapa keunggulan yaitu mudah untuk membuat output yang banyak dan mudah dalam pengontrolannya. Proses switching pada half bridge konverter mengunakan mosfet IRFP 460 dan dijalankan menggunakan IC UC SG3525 dengan frekuensi switching 40 KHz. Dalam mengoptimalkan  alat ini, menggunakan suplai 220 Volt AC lansung disearahkan menggunakan dioda, dan di filter menggunakan kapasitor. Hasil penyerahan tersebut kemudian masuk ke half bridge konverter, yang di jalankan oleh SG 3525 dan mosfet IRFP 460, kemudian masuk kedalam rangkaian filter output, dan siap digunakan. Keluaran pada power supply ini dapat diatur sesuai kebutuhan dengan rentang tegangan 0 Volt sampai 23,33 Volt, 10 A. Power supply ini juga dilengkapi dengan rangkaian feedback, sehingga tegangan keluar dapat stabil.Serta dapat diatur sesuai kebutuhan dalam praktikum Elektronika Analog khususnya dalam unit percobaan Clipper dan unit percobaan Gate . Abstract Optimizing the Use of Power Supply Switching Practice Tools Using Topology Half Bridge Converter As A Tool for Analogue Electronics Practise Power supply is a hardware that can supply power or voltage directly from the source voltage to the other electrical voltage. The power supply has input from alternating current (AC) voltage and converts it into direct current current (DC) which will be used to supply electronic equipment requiring direct current. Power supply is divided into two: linear power supply and switching power supply. In the switching power supply that will be optimized in its use using a half bridge converter topology. The converter half bridge topology has several advantages: it is easy to make a lot of output and easy to control. The switching process in half bridge converter uses IRFP 460 mosfet and runs UC SG3525 IC with 40 KHz switching frequency. In optimizing this tool, use 220 volt AC supply directly rectified using diode, and in filter using capacitor. The result then goes to the half bridge converter, which is run by SG 3525 and IRFP 460 mosfet, then goes into the output filter circuit, and ready to use. Output on this power supply can be adjusted as needed with voltage range 0 Volt to 23.33 Volt, 10 A. Power supply is also equipped with feedback circuit, so the out voltage can be stabilized. And can be arranged according to requirement in Analog Electronics especially in unit Clipper experiment and Gate experimental unit.
INVERTER FREKUENSI TINGGI SEBAGAI PEMANAS PIRINGAN LOGAM DENGAN METODE INDUKSI PADA APLIKASI PEMANAS ROTI Alem, Rio Dery; Enny, Enny
METANA Vol 11, No 01 (2015): Juli 2015
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (340.412 KB) | DOI: 10.14710/metana.v11i01.12581

Abstract

Abstrak Kegiatan rumah tangga di Indonesia seringkali melakukan kegiatan masak-memasak, baik untuk membuat makanan atau hanya sekedar memanaskan, oleh karena itu diperlukan teknologi yang praktis, murah dan aman. Untuk membuat sebuah alat yang mampu meringankan proses pemanasan makanan, metode induksi dapat digunakan sebagai pemanas piringan logam untuk meningkatkan keamanan dalam proses tersebut. Pemanas induksi ini dipilih karena tidak menimbulkan api, dan antara alat pemanas dan obyek yang dipanasi tak terjadi kontak fisik sehingga aman. Untuk membuat pemanas induksi dibutuhkan modul inverter frekuensi tinggi dengan arus yang besar. Dari sumber tegangan AC 1 fasa 220 volt yang di step down menjadi 12 V dan disearahkan menggunakan penyearah jembatan penuh, kemudian inverter akan mengkonversi besaran listrik DC menjadi besaran listrik AC dengan frekuensi yang tinggi. Pada dasarnya frekuensi dapat di atur dengan menggunakan rangakaian driver. Rangakaian driver memiliki fungsi untuk memicu gate MOSFET IRFP 260. Pada inverter ini keluaran inverter berupa tegangan AC dengan frekuensi mencapai 71,4 kHz. Keluaran inverter tersebut dilewatkan pada sebuah kumparan penginduksi yang akan digunakan sebagai pemanas piringan logam. Hasil pengukuran menunjukkan modul inverter yang dibuat memiliki frekuensi sebesar 71,4 kHz, dapat menghasilkan panas diatas 80 derajat celcius, diharapkan dengan tingginya daya yang digunakan untuk menginduksi beban, suhu pada beban akan cepat meningkat. Keyword : pemanas induksi, mosfet,arus eddy, frekuensi, inverter,driver.  Abstract Household activities in Indonesia are often doing the cooking, either to make a meal or just heat up, therefore the necessary technology is practical, cheap and safe. To create a tool capable of easing the process of heating food, it can be used as a method of induction heating metal disks to improve security in the process. Induction heating is selected because it does not cause a fire, and between the heater and heated object is not in physical contact so safe. To make the required induction heating high-frequency inverter module with a large current. From the first phase AC voltage source 220 volts in step-down to 12 V and rectified using full bridge rectifier, then inverter will convert the DC power into a massive amount of AC power with a high frequency. Basically, the frequency can be set by using the driver circuit. Rangakaian driver has a function to trigger the MOSFET gate IRFP 260. In this inverter, inverter output in the form of AC voltage with a frequency of 71.4 kHz achieve. The inverter output is passed in a coil inducer to be used as heating metal plate. The measurement results show inverter modules are made to have a frequency of 71.4 kHz, can generate heat above 80 degrees Celsius, is expected by the high frequency used to induce the load, the temperature of the load will quickly increase. Keyword: induction heating, mosfet, eddy current, frequency, inverter, driver.
PERANGKAP NYAMUK RAMAH LINGKUNGAN YANG MENGGUNAKAN BAHAN RAGI UNTUK PENGEMBANG BIAKAN KESTABILAN SUHU DENGAN HEAT DETECTOR YANG MENGGUNAKAN NTC ( NEGATIVE TEMPERATURE COEFFISIEN) Enny, Enny
METANA Vol 9, No 02 (2013): Desember 2013
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (378.672 KB) | DOI: 10.14710/metana.v9i02.7617

Abstract

Abstract Tool mosquito traps we encounter in our lives, be it in liquid or solid form, but there are some that contain chemicals. In the environment of our lives more and more developing mosquitoes due to less uncontrolled channels substandard and not arranged. And there are many people who use liquid or solid materials containing chemical substances, which can interfere with human comfort In this study makes tools that are environmentally friendly mosquito trap, this tool can be applied in the community, since it is also quite easy, does not require hazardous materials, comparatively simple and fast. With the creation of yeast and sugar solution will cause the fermentation process, where the results of this fermentation process will produce CO2 or carbon dioxide is a chemical compound that is the most interesting mosquitoes come. To control the temperature as well as the results of CO2 gas can develop rapidly so we set it up or put up with a tool such as a series heat detector that uses NTC (Negative Temperature Coeffisien) which can control the temperature of  25oC-30oC. Thus, the more carbon dioxide, the more mosquitoes were trapped. The results showed that use of the material I :( yeast = 1 gram = 50 grams of brown sugar, water = 250 ml) and material 2 (= 1 g Yeast, Brown sugar: 100gr, water = 250 ml) results are better materials 2 because these materials tend to be attractive / approachable mosquitoes, because the adhesions combined sugar yeast grow better and produce different yeast aroma of material 1 Keywords: mosquito trap, environmentally friendly
Clinical Characteristics of Coronavirus Disease 2019 in Dr. Agoesdjam Regional Public Hospital, Ketapang, West Kalimantan, Indonesia Willim, Herick Alvenus; Cristianto, Cristianto; Sihombing, Yohana Roy Ito Br; Munthe, Eva Lydia; Mujono, Widi; Enny, Enny
Journal of Epidemiology and Public Health Vol. 5 No. 3 (2020)
Publisher : Masters Program in Public Health, Universitas Sebelas Maret, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (33.261 KB)

Abstract

Background: Coronavirus disease 2019 (COVID-19) is a new pandemic caused by SARS-CoV-2 infection. COVID-19 has spread to almost all countries with increasing cases, including Indonesia. Data on the clinical characteristics of COVID-19 in Indonesia is still limited. This study aimed to determine the clinical characteristics of COVID-19.Subjects and Method: This study was a descriptive study with a retrospective design conducted in Dr. Agoesdjam Regional Public Hospital. The data were obtained from the medical records of all patients with confirmed COVID-19 from April 1 to July 31, 2020. There were 50 patients as the sample of the study. The data collected were demographics, expo
Clinical Characteristics of Coronavirus Disease 2019 in Dr. Agoesdjam Regional Public Hospital, Ketapang, West Kalimantan, Indonesia Willim, Herick Alvenus; Cristianto, Cristianto; Sihombing, Yohana Roy Ito Br; Munthe, Eva Lydia; Mujono, Widi; Enny, Enny
Journal of Epidemiology and Public Health Vol. 5 No. 3 (2020)
Publisher : Masters Program in Public Health, Universitas Sebelas Maret, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Background: Coronavirus disease 2019 (COVID-19) is a new pandemic caused by SARS-CoV-2 infection. COVID-19 has spread to almost all countries with increasing cases, including Indonesia. Data on the clinical characteristics of COVID-19 in Indonesia is still limited. This study aimed to determine the clinical characteristics of COVID-19.Subjects and Method: This study was a descriptive study with a retrospective design conducted in Dr. Agoesdjam Regional Public Hospital. The data were obtained from the medical records of all patients with confirmed COVID-19 from April 1 to July 31, 2020. There were 50 patients as the sample of the study. The data collected were demographics, expo
An Ethnography Study Of Shared Values Woman As Mining Blast Engineer Pratama, Renaldo; Enny, Enny; Alex Fernando Hasahatan; Jerry Heikal
J-CEKI : Jurnal Cendekia Ilmiah Vol. 4 No. 4: Juni 2025
Publisher : CV. ULIL ALBAB CORP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/jceki.v4i4.9043

Abstract

This research examines the shared values of women working as mining blast engineers in the mining industry. Through a qualitative approach with a realist ethnographic design, this study analyzes the experiences, perspectives, and adaptation strategies of three female mining blast engineers. The shared values owned by the respondents before entering the blast engineer job are independent character, confidence, courage, toughness, assertiveness, strong faith, respect, professionalism and trustworthiness. Pain values include long work schedules, distant work locations, male-dominated work environments, and fatigue due to work and field conditions. Meanwhile, the shared values formed from these pain values are characters who are brave, tough, assertive, respectful, environmentally sound, professional and trustworthy. These values enable them to adapt, survive and thrive in their field of work. The research also found that the implementation of gender diversity policies has a positive impact on the availability of a safe and conducive working atmosphere and environment. This policy allows all workers, regardless of gender, to have the same duties and responsibilities. It also has an impact on more conducive internal and external work processes, with a focus on work processes and outcomes, rather than on who is working on the project. This research concludes that women have great potential to become mining blast engineers in the mining industry. And the wider implementation of gender diversity policies in mining companies can help create a more inclusive work environment and encourage women's participation in important positions such as mining blast engineer.
Analisis Peningkatan Kecenderungan Masyarakat Dalam Berolahraga Menggunakan Grounded Theory Hasahatan, Alex Fernando; Enny, Enny; Pratama, Renaldo; Heikal, Jerry
J-CEKI : Jurnal Cendekia Ilmiah Vol. 4 No. 4: Juni 2025
Publisher : CV. ULIL ALBAB CORP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/jceki.v4i4.9856

Abstract

Setelah Pandemi Covid 19 berakhir, terlihat fenomena peningkatan kegiatan-kegiatan olahraga seperti sepakbola, basket, lari kembali diadakan. Animo masyarakat juga semakin tinggi untuk ikut dalam kegiatan olahraga terutama lari. Penelitian ini bertujuan untuk memahami motivasi masyarakat dalam berolahraga setelah pandemi Covid-19 dengan menggunakan Grounded Theory karena grounded teori memiliki kemampuan untuk menganalisa variasi dari tingkah laku responden. Penelitian ini menggunakan metode kualitatif pada pelaku kegiatan olahraga di Car free Day (CFD) Jakarta di jalan Sudirman. Pengumpulan data dilakukan melalui wawancara mendalam terhadap 12 orang pelaku olahraga sebagai responden lalu dibuat verbatim dan sintesis. Dari hasil wawancara terdapat 56 coding dan diidentifikasi menjadi 7 kategor dan menjadi 3 tema besar dengan nilai tema tertinggi adalah terkait pada faktor sosial. Penelitian ini menemukan beberapa faktor yang mejadi motivasi terjadinya fenomena peningkatan masyarakat berolahraga belakangan ini yaitu masyarakat percaya bahwa dengan berolahraga secara rutin sebagai bagian untuk mendapatkan kebugaran, interaksi sosial dan juga kenyamanan psikologis. Berdasarkan analisis ini, hasil menunjukkan bahwasanya masyarakat Jakarta khususnya melakukan olahraga sebagai bagian dari manusia sosial, olahraga tidak lagi hanya menjadi kegiatan fisik para atlit untuk mendapatkan kebugaran dan medali, namun juga menjadi wadah untuk menyalurkan hasrat manusia sebagai makhluk sosial. Olahraga sudah menjadi wadah untuk mengaktualisasi diri, berinteraksi dengan kolega, dan menjalin koneksi dengan kolega yang memiliki kesamaan interest/hobi.
Credit Card Customer Churn Prediction With Binary Logistic Regression Enny, Enny; Pratama, Renaldo; Alex Fernando Hasahatan; Jerry Heikal
J-CEKI : Jurnal Cendekia Ilmiah Vol. 4 No. 6: Oktober 2025
Publisher : CV. ULIL ALBAB CORP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/jceki.v4i6.11772

Abstract

The increasing prevalence of credit card usage in Indonesia has brought significant benefits to the national economy but also presents challenges for the banking industry, particularly regarding customer churn. This research aims to analyze the factors influencing credit card customer churn using the Binary Logistic Regression method. Utilizing a dataset of 5,000 entries from Kaggle, the research incorporates demographic and behavioral variables such as age, marital status, product ownership, inactivity periods, and transaction patterns. Data preprocessing steps included handling missing values, encoding categorical variables, and feature scaling. The model was trained with 80% of the data and tested on 20%, with variable selection based on p-values (< 0.05). The results indicate that eight key factors significantly affect churn likelihood, including number of dependents, marital status, number of products, inactive months, number of contacts, total transactions, transaction count, and the ratio of Q4 to Q1 transaction amounts. The model achieved an accuracy of 87.10%, demonstrating strong predictive performance, especially for non-churn cases. These findings suggest that classical statistical approaches remain effective for churn prediction when supported by comprehensive data processing and relevant variable selection. The study contributes valuable insights for financial institutions to develop targeted retention strategies and enhance customer loyalty.
Co-Authors Alex Fernando Hasahatan Cristianto, Cristianto Hasahatan, Alex Fernando Heikal, Jerry Jerry Heikal Mujono, Widi Munthe, Eva Lydia Pratama, Renaldo Rio Dery Alem, Rio Dery Sihombing, Yohana Roy Ito Br Willim, Herick Alvenus