mukti wibowo - Academia.edu (original) (raw)

Papers by mukti wibowo

Jurnal Teknologi Informasi dan Komunikasi, Mar 1, 2024

A Currently, various communication platforms are available, and one of them is Discord. Discord i... more A Currently, various communication platforms are available, and one of them is Discord. Discord is utilized by users to interact and share various types of content. However, Discord is often implicated in the distribution of inappropriate content that goes against Discord regulations. This can lead to cybercrime cases such as Child Sexual Abuse Material (CSAM). The main challenge faced is the recovery of digitally deleted data through these communication platforms. The objective of this research is to analyze digital evidence in the form of deleted text messages, images, and documents in the chat rooms of the desktopbased Discord application. The research method employed is the Live Forensic Technique, applying the DFRWS (Digital Forensics Research Workshop) method. The digital forensic analysis process is conducted using the digital forensic tool Magnet Axiom. The research results indicate that the accuracy of digital evidence analysis using Magnet Axiom reaches 94.11%. A total of 16 digital evidence items were successfully recovered out of the total 17 items available.

Salah Satu Kelemahan Dari Beton Adalah Mempunyai Kuat Tarik Yang Rendah, Sehingga Beton Perlu Dib... more Salah Satu Kelemahan Dari Beton Adalah Mempunyai Kuat Tarik Yang Rendah, Sehingga Beton Perlu Diberi Tulangan Baja Untuk Tegangan Tarik Yang Terjadi. Disamping Itu Beton Dapat Mengalami Retak Akibat Perbedaan Temperatur Yang Tinggi Antara Bagian Dalam Dan Bagian Luar Dari Beton. Pada Penelitian Ini Campuran Beton Ditambahkan Dengan Serat Dari Senar Pancing Untuk Melihat Pengaruh Beton Fiber Dari Senar Pancing Terhadap Kuat Tarik Belah Beton.

Sejak krisis ekonomi yang melanda indonesia sejak akhir tahun 1997 serta krisis keuangan global d... more Sejak krisis ekonomi yang melanda indonesia sejak akhir tahun 1997 serta krisis keuangan global di tahun 2008 yang berdampak pada merosotnya nilai tukar rupiah terhadap dollar telah berdampak luas pada kehidupan politik dan ekonomi sehingga membuat perusahaan-perusahaan publik di Indonesia ikut melemah dan terpuruk. Kondisi ini juga berpengaruh pada sektor manufaktur. Tujuan dari penelitian ini adalah untuk mengetahui kinerja keuangan perusahaan Manufaktur Sektor Makanan & Minuman, dengan menggunakan model Altman dan Zmijewski periode 2011-2015. Penelitian ini menggunakan data skunder pada Perusahaan Manufaktur Sub Sektor Makanan & Minuman yaitu PT Delta Djakarta Tbk, PT Indofood Sukses Makmur CBP Tbk, PT Indofood Sukses Makmur Tbk, PT Multi Bintang Indonesia Tbk, PT Nippon Indosari Corporindo Tbk dan PT Ultrajaya Milk Industry & Trading Company Tbk yang terdaftar di Bursa Efek Indonesia periode 2011-2015 dengan menggunakan teknik analisis deskriptif kuantitatif. Berdasarkan analisi...

The main objective of the present work is the determination of the ideal conditions for the obser... more The main objective of the present work is the determination of the ideal conditions for the observation and study of the relaxation processes due to dislocations in high purity niobium. This work is divided into two parts. In the first part, the arrival of point defects on dislocations during the course of thermal treatment is used to study the prior purification and subsequent contamination of the sample. In the second part a study is made of the evolution of the α-peak during the same treatment. The niobium samples from Materials Research Co. were degassed in a vacuum of 4 × 10 -9 Torr at a temperature of 2500 K. The internal friction and excitation frequency spectra as a function of temperature were obtained with degassed and cold-worked samples at 77 or 295 K. After various thermal treatments up to 700 K the internal friction spectra shows the existence of at least two stages of defect migration and also a diminution of the height of the α-peak.

The aim of this study was investigate the effect of physical working environment and non-physical... more The aim of this study was investigate the effect of physical working environment and non-physical working environment on employee satisfaction, both simultaneously and partially. The research type is explanatory research. Questionnaire was used as tata collection method. The number of sample was 61 respondents of employees in PT. Telekomunikasi Indonesia Tbk, branch Kandatel Malang. Multiple regression analysis through software SPSS 16 was used to test the research hypothesis. The results showed that, the physical working environment and non-physical working environment simultaneously have significant effect on employee satisfaction, the physical working environment partially has a positive and significant effect on employee satisfaction, non-physical working environment partially has a positive and significant effect on employee satisfaction. Lastly, the R 2 in this study was 0.53, it’s means that the model can explained 53% to predict employee satisfaction, while 47% are explaine...

The spatial resolution of frequency-modulated continuous wave(FMCW) laser ranging technology is l... more The spatial resolution of frequency-modulated continuous wave(FMCW) laser ranging technology is limited by the frequency sweep non-linearity. The typical method for suppressing the influence of sweep non-linearity is that using an auxiliary interference signal to sample the measurement signal at the equal frequency intervals. The ranging scale of this method is restricted by the optical path difference of the auxiliary interferometry. We have presented a reverse frequency sample method that using measurement signal to sample the auxiliary signal, the range can be acquired from the ratio of the optical path difference of the auxiliary interferometry to the frequency of the resample signal. The experiment has verified that the reverse frequency sample method can measure the distance longer than the optical path difference, increasing the available ranging scale compared to the typical frequency sample method. This method can also avoid the influence of frequency sweep non-linearity on...

CYCLOTRON, 2020

Phototherapy merupakan perangkat yang dapat menghasilkan radiasi cahaya biru untuk terapi hiperbi... more Phototherapy merupakan perangkat yang dapat menghasilkan radiasi cahaya biru untuk terapi hiperbilirubinemi. Phototherapy memiliki banyak jenis lampu yang dapat menghasilkan radiasi sinar biru,salah satunya neon tabung yang banyak kita jumpai di indonesia, jenis lampu ini harganya murah namun masa efektifnya pendek, sehingga untuk meningkatkan efektivitas terapi hiperbilirubinemia, lampu harus di ganti ketika nilai iridiasinya kurang dari 176 μW / atau sekitar 2000 jam penggunaan. Tujuan dari penelitian ini adalah mengembangkan phototherapy yang dilengkapi dengan notifikasi via smartphone, sehingga sebelum masa efektif lampu habis, phototherapy secara otomatis mengirimkan pesan singkat kepada pengguna. Berdasarkan pengujian dengan perbandingan waktu 1:100, pengguna menerima pesan singkat 3 menit sebelum masa efektif lampu habis, Notifikasi ini sangat membantu manajemen rumah sakit untuk menganggarkan pembelian suku cadang.Phototherapy merupakan perangkat yang dapat menghasilkan rad...

CYCLOTRON, 2020

Nanoteknologi adalah teknologi terbaru yang sangat menjanjikan untuk masa depan yang memiliki ban... more Nanoteknologi adalah teknologi terbaru yang sangat menjanjikan untuk masa depan yang memiliki banyak aplikasi potensial dan aktual pada perangkat nanoelektronik. Namun, untuk mendapatkan manfaat pada nanoteknologi diperlukan teknologi canggih itu sendiri. Masalah utama fabrikasi perangkat nanoelectronic adalah skalanya yang kecil, area yang kecil, volume yang kecil dan konsentrasi yang rendah. Pembuatan dalam skala nano memunculkan masalah tidak hanya pada kinerja, tetapi juga biaya untuk industri elektronik. Untuk mengatasi masalah ini, kami mempelajari profil kontak logam. Kami menyajikan profil aluminium (Al) untuk mendapatkan sifat-sifat yang diharapkan dan juga efektif dalam hal biaya, karena aluminium banyak digunakan dalam banyak aplikasi elektronik seperti spintronics, sel surya, transistor film tipis, dan bahkan untuk fotokatalis. Dalam penelitian ini, Al dievaporasikan oleh termal evaporator. Sifat struktural film Al dikarakterisasi menggunakan XRD, AFM, dan FESEM. Sifat k...

Optics & Laser Technology, 2017

Abstract A dual-beam laser autofocusing system is designed in this paper. The autofocusing system... more Abstract A dual-beam laser autofocusing system is designed in this paper. The autofocusing system is based on a liquid lens with less moving parts and fast response time, which makes the system simple, reliable, compact and fast. A novel scheme “Time-sharing focus, fast conversion” is innovatively proposed. The scheme effectively solves the problem that the guiding laser and the working laser cannot focus at the same target point because of the existence of chromatic aberration. This scheme not only makes both guiding laser and working laser achieve optimal focusing in guiding stage and working stage respectively, but also greatly reduces the system complexity and simplifies the focusing process as well as makes autofocusing time of the working laser reduce to about 10 ms. In the distance range of 1 m to 30 m, the autofocusing spot size is kept under 4.3 mm at 30 m and just 0.18 mm at 1 m. The spot size is much less influenced by the target distance compared with the collimated laser with a micro divergence angle for its self-adaptivity. The dual-beam laser autofocusing system based on liquid lens is fully automatic, compact and efficient. It is fully meet the need of dynamicity and adaptivity and it will play an important role in a number of long-range control applications.

Sumur X-1 menggunakan pompa ING3200 45hz/119 stage menghasilkan laju produksi sebesar 2026 bpd da... more Sumur X-1 menggunakan pompa ING3200 45hz/119 stage menghasilkan laju produksi sebesar 2026 bpd dan efisiensi pompa sebesar 61,5%. Tetapi berdasarkan kurva IPR sumur X-1 laju produksinya masih bisa ditingkatkan sehingga perlu dilakukan optimasi agar diperoleh laju produksi yang sesuai dengan produktivitas formasinya. Prosedur untuk evaluasi dan perencanaan ulang pada sumur X-1 sebagai berikut : pengumpulan data, penentuan laju alir kritis tanpa coning dengan metode Craft and Hawkins, penentuan produktivitas formasi dengan menggunakan IPR metode Pudjo Sukarno, evaluasi pompa terpasang, dan perencanaan ulang pompa dengan PSD berubah dengan tipe pompa dan stage tetap dan frequency berubah dengan tipe pompa dan PSD tetap. Berdasarkan hasil perhitungan didapatkan pada sumur X-1 dengan tipe pompa ING3200/47 Hz/3500 RPM/119 stage, PSD(Pump Setting Depth) pada kedalaman 3742 ft, akan menghasilkan laju alir sebesar 2438 bpd. Laju alir ini didapatkan pada saat frequency pompa dirubah dari 45 Hz menjadi 50 Hz dengan efisiensi pompa 62,7%.

Jurnal Administrasi Bisnis, Jul 11, 2014

International Journal of Smart Grid and Clean Energy, 2019

While wind energy is widely used across the world, its utilization, especially in cases where the... more While wind energy is widely used across the world, its utilization, especially in cases where the speed of wind is low, has not been optimized. This study aimed at establishing the impact of pitch angle magnitude utilized in horizontal wind turbines at low speed. A NACA 6412 type airfoil made from mahogany's wood was installed to a wind tunnel to measure the performance. The effect of pitch angle was determined at low wind speeds using 0ᵒ, 2ᵒ, 4ᵒ, 6ᵒ, 8ᵒ, 10ᵒ, and 12ᵒ angles. The speed was varied between 1 m/s and 5 m/s. The wind originated from a blower installed and was controlled by an anemometer to determine the speed. The findings of the study established that the variation of pitch angles results to differences in power and rotation of the rotor produced by the wind turbines. The output of the experiment was current and voltage converted to power and total efficiency. The highest electrical power of 9.7240W was produced at the most optimal pitch angle of 8 ° and a wind speed of 5 m/s. In the end, the study showed that horizontal wind turbines with NACA 6412 and 8ᵒ pitch angle produce the highest total efficiency at 11.2% and 5 m / s speed.

Jurnal Teknologi Informasi dan Komunikasi, Mar 1, 2024

A Currently, various communication platforms are available, and one of them is Discord. Discord i... more A Currently, various communication platforms are available, and one of them is Discord. Discord is utilized by users to interact and share various types of content. However, Discord is often implicated in the distribution of inappropriate content that goes against Discord regulations. This can lead to cybercrime cases such as Child Sexual Abuse Material (CSAM). The main challenge faced is the recovery of digitally deleted data through these communication platforms. The objective of this research is to analyze digital evidence in the form of deleted text messages, images, and documents in the chat rooms of the desktopbased Discord application. The research method employed is the Live Forensic Technique, applying the DFRWS (Digital Forensics Research Workshop) method. The digital forensic analysis process is conducted using the digital forensic tool Magnet Axiom. The research results indicate that the accuracy of digital evidence analysis using Magnet Axiom reaches 94.11%. A total of 16 digital evidence items were successfully recovered out of the total 17 items available.

Salah Satu Kelemahan Dari Beton Adalah Mempunyai Kuat Tarik Yang Rendah, Sehingga Beton Perlu Dib... more Salah Satu Kelemahan Dari Beton Adalah Mempunyai Kuat Tarik Yang Rendah, Sehingga Beton Perlu Diberi Tulangan Baja Untuk Tegangan Tarik Yang Terjadi. Disamping Itu Beton Dapat Mengalami Retak Akibat Perbedaan Temperatur Yang Tinggi Antara Bagian Dalam Dan Bagian Luar Dari Beton. Pada Penelitian Ini Campuran Beton Ditambahkan Dengan Serat Dari Senar Pancing Untuk Melihat Pengaruh Beton Fiber Dari Senar Pancing Terhadap Kuat Tarik Belah Beton.

Sejak krisis ekonomi yang melanda indonesia sejak akhir tahun 1997 serta krisis keuangan global d... more Sejak krisis ekonomi yang melanda indonesia sejak akhir tahun 1997 serta krisis keuangan global di tahun 2008 yang berdampak pada merosotnya nilai tukar rupiah terhadap dollar telah berdampak luas pada kehidupan politik dan ekonomi sehingga membuat perusahaan-perusahaan publik di Indonesia ikut melemah dan terpuruk. Kondisi ini juga berpengaruh pada sektor manufaktur. Tujuan dari penelitian ini adalah untuk mengetahui kinerja keuangan perusahaan Manufaktur Sektor Makanan & Minuman, dengan menggunakan model Altman dan Zmijewski periode 2011-2015. Penelitian ini menggunakan data skunder pada Perusahaan Manufaktur Sub Sektor Makanan & Minuman yaitu PT Delta Djakarta Tbk, PT Indofood Sukses Makmur CBP Tbk, PT Indofood Sukses Makmur Tbk, PT Multi Bintang Indonesia Tbk, PT Nippon Indosari Corporindo Tbk dan PT Ultrajaya Milk Industry & Trading Company Tbk yang terdaftar di Bursa Efek Indonesia periode 2011-2015 dengan menggunakan teknik analisis deskriptif kuantitatif. Berdasarkan analisi...

The main objective of the present work is the determination of the ideal conditions for the obser... more The main objective of the present work is the determination of the ideal conditions for the observation and study of the relaxation processes due to dislocations in high purity niobium. This work is divided into two parts. In the first part, the arrival of point defects on dislocations during the course of thermal treatment is used to study the prior purification and subsequent contamination of the sample. In the second part a study is made of the evolution of the α-peak during the same treatment. The niobium samples from Materials Research Co. were degassed in a vacuum of 4 × 10 -9 Torr at a temperature of 2500 K. The internal friction and excitation frequency spectra as a function of temperature were obtained with degassed and cold-worked samples at 77 or 295 K. After various thermal treatments up to 700 K the internal friction spectra shows the existence of at least two stages of defect migration and also a diminution of the height of the α-peak.

The aim of this study was investigate the effect of physical working environment and non-physical... more The aim of this study was investigate the effect of physical working environment and non-physical working environment on employee satisfaction, both simultaneously and partially. The research type is explanatory research. Questionnaire was used as tata collection method. The number of sample was 61 respondents of employees in PT. Telekomunikasi Indonesia Tbk, branch Kandatel Malang. Multiple regression analysis through software SPSS 16 was used to test the research hypothesis. The results showed that, the physical working environment and non-physical working environment simultaneously have significant effect on employee satisfaction, the physical working environment partially has a positive and significant effect on employee satisfaction, non-physical working environment partially has a positive and significant effect on employee satisfaction. Lastly, the R 2 in this study was 0.53, it’s means that the model can explained 53% to predict employee satisfaction, while 47% are explaine...

The spatial resolution of frequency-modulated continuous wave(FMCW) laser ranging technology is l... more The spatial resolution of frequency-modulated continuous wave(FMCW) laser ranging technology is limited by the frequency sweep non-linearity. The typical method for suppressing the influence of sweep non-linearity is that using an auxiliary interference signal to sample the measurement signal at the equal frequency intervals. The ranging scale of this method is restricted by the optical path difference of the auxiliary interferometry. We have presented a reverse frequency sample method that using measurement signal to sample the auxiliary signal, the range can be acquired from the ratio of the optical path difference of the auxiliary interferometry to the frequency of the resample signal. The experiment has verified that the reverse frequency sample method can measure the distance longer than the optical path difference, increasing the available ranging scale compared to the typical frequency sample method. This method can also avoid the influence of frequency sweep non-linearity on...

CYCLOTRON, 2020

Phototherapy merupakan perangkat yang dapat menghasilkan radiasi cahaya biru untuk terapi hiperbi... more Phototherapy merupakan perangkat yang dapat menghasilkan radiasi cahaya biru untuk terapi hiperbilirubinemi. Phototherapy memiliki banyak jenis lampu yang dapat menghasilkan radiasi sinar biru,salah satunya neon tabung yang banyak kita jumpai di indonesia, jenis lampu ini harganya murah namun masa efektifnya pendek, sehingga untuk meningkatkan efektivitas terapi hiperbilirubinemia, lampu harus di ganti ketika nilai iridiasinya kurang dari 176 μW / atau sekitar 2000 jam penggunaan. Tujuan dari penelitian ini adalah mengembangkan phototherapy yang dilengkapi dengan notifikasi via smartphone, sehingga sebelum masa efektif lampu habis, phototherapy secara otomatis mengirimkan pesan singkat kepada pengguna. Berdasarkan pengujian dengan perbandingan waktu 1:100, pengguna menerima pesan singkat 3 menit sebelum masa efektif lampu habis, Notifikasi ini sangat membantu manajemen rumah sakit untuk menganggarkan pembelian suku cadang.Phototherapy merupakan perangkat yang dapat menghasilkan rad...

CYCLOTRON, 2020

Nanoteknologi adalah teknologi terbaru yang sangat menjanjikan untuk masa depan yang memiliki ban... more Nanoteknologi adalah teknologi terbaru yang sangat menjanjikan untuk masa depan yang memiliki banyak aplikasi potensial dan aktual pada perangkat nanoelektronik. Namun, untuk mendapatkan manfaat pada nanoteknologi diperlukan teknologi canggih itu sendiri. Masalah utama fabrikasi perangkat nanoelectronic adalah skalanya yang kecil, area yang kecil, volume yang kecil dan konsentrasi yang rendah. Pembuatan dalam skala nano memunculkan masalah tidak hanya pada kinerja, tetapi juga biaya untuk industri elektronik. Untuk mengatasi masalah ini, kami mempelajari profil kontak logam. Kami menyajikan profil aluminium (Al) untuk mendapatkan sifat-sifat yang diharapkan dan juga efektif dalam hal biaya, karena aluminium banyak digunakan dalam banyak aplikasi elektronik seperti spintronics, sel surya, transistor film tipis, dan bahkan untuk fotokatalis. Dalam penelitian ini, Al dievaporasikan oleh termal evaporator. Sifat struktural film Al dikarakterisasi menggunakan XRD, AFM, dan FESEM. Sifat k...

Optics & Laser Technology, 2017

Abstract A dual-beam laser autofocusing system is designed in this paper. The autofocusing system... more Abstract A dual-beam laser autofocusing system is designed in this paper. The autofocusing system is based on a liquid lens with less moving parts and fast response time, which makes the system simple, reliable, compact and fast. A novel scheme “Time-sharing focus, fast conversion” is innovatively proposed. The scheme effectively solves the problem that the guiding laser and the working laser cannot focus at the same target point because of the existence of chromatic aberration. This scheme not only makes both guiding laser and working laser achieve optimal focusing in guiding stage and working stage respectively, but also greatly reduces the system complexity and simplifies the focusing process as well as makes autofocusing time of the working laser reduce to about 10 ms. In the distance range of 1 m to 30 m, the autofocusing spot size is kept under 4.3 mm at 30 m and just 0.18 mm at 1 m. The spot size is much less influenced by the target distance compared with the collimated laser with a micro divergence angle for its self-adaptivity. The dual-beam laser autofocusing system based on liquid lens is fully automatic, compact and efficient. It is fully meet the need of dynamicity and adaptivity and it will play an important role in a number of long-range control applications.

Sumur X-1 menggunakan pompa ING3200 45hz/119 stage menghasilkan laju produksi sebesar 2026 bpd da... more Sumur X-1 menggunakan pompa ING3200 45hz/119 stage menghasilkan laju produksi sebesar 2026 bpd dan efisiensi pompa sebesar 61,5%. Tetapi berdasarkan kurva IPR sumur X-1 laju produksinya masih bisa ditingkatkan sehingga perlu dilakukan optimasi agar diperoleh laju produksi yang sesuai dengan produktivitas formasinya. Prosedur untuk evaluasi dan perencanaan ulang pada sumur X-1 sebagai berikut : pengumpulan data, penentuan laju alir kritis tanpa coning dengan metode Craft and Hawkins, penentuan produktivitas formasi dengan menggunakan IPR metode Pudjo Sukarno, evaluasi pompa terpasang, dan perencanaan ulang pompa dengan PSD berubah dengan tipe pompa dan stage tetap dan frequency berubah dengan tipe pompa dan PSD tetap. Berdasarkan hasil perhitungan didapatkan pada sumur X-1 dengan tipe pompa ING3200/47 Hz/3500 RPM/119 stage, PSD(Pump Setting Depth) pada kedalaman 3742 ft, akan menghasilkan laju alir sebesar 2438 bpd. Laju alir ini didapatkan pada saat frequency pompa dirubah dari 45 Hz menjadi 50 Hz dengan efisiensi pompa 62,7%.

Jurnal Administrasi Bisnis, Jul 11, 2014

International Journal of Smart Grid and Clean Energy, 2019

While wind energy is widely used across the world, its utilization, especially in cases where the... more While wind energy is widely used across the world, its utilization, especially in cases where the speed of wind is low, has not been optimized. This study aimed at establishing the impact of pitch angle magnitude utilized in horizontal wind turbines at low speed. A NACA 6412 type airfoil made from mahogany's wood was installed to a wind tunnel to measure the performance. The effect of pitch angle was determined at low wind speeds using 0ᵒ, 2ᵒ, 4ᵒ, 6ᵒ, 8ᵒ, 10ᵒ, and 12ᵒ angles. The speed was varied between 1 m/s and 5 m/s. The wind originated from a blower installed and was controlled by an anemometer to determine the speed. The findings of the study established that the variation of pitch angles results to differences in power and rotation of the rotor produced by the wind turbines. The output of the experiment was current and voltage converted to power and total efficiency. The highest electrical power of 9.7240W was produced at the most optimal pitch angle of 8 ° and a wind speed of 5 m/s. In the end, the study showed that horizontal wind turbines with NACA 6412 and 8ᵒ pitch angle produce the highest total efficiency at 11.2% and 5 m / s speed.