Hasil Pencarian  ::  Simpan CSV :: Kembali

Abstrak :
Safety Instrumented System (SIS) saat ini telah banyak dan bahkan wajib digunakan di berbagai sektor industri terutama minyak dan gas untuk mendeteksi hazard, melakukan tindakan penyelamatan dan mitigasi. SIS mempunyai nilai Safety Integrity Level (SIL) yang menentukan sistem tersebut sesuai dengan kriteria yang diperlukan. Pada tesis ini dibahas mengenai penentuan nilai SIL dan konfigurasi pada SIS di Mutiara Central Gas Plant PT.XX. Sesuai IEC 61508 dan IEC 61511, perlu adanya hazard risk assessment dimana metode HAZOP dan LOPA akan dipakai untuk menentukan target SIL tersebut, proses verifikasi desain dan konfigurasi SIS juga harus dilakukan terhadap target SIL. Dari hasil penelitian ini terdapat 15 SIF dengan SIL 1 dan 2 SIF dengan SIL 2 yang harus diterapkan untuk SIS di Mutiara Central Gas Plant dimana berdasarkan verifikasi, konfigurasi 1 out of 1 dapat mencapai persyaratan hingga SIL 2. ......Safety Instrumented System (SIS) has now been numerous and moreover shall be used in various industrial sectors, especially oil and gas to detect hazards, carry out safety and mitigation actions. SIS has the value of Safety Integrity Level (SIL) which determines the system in accordance with the required criteria. In this thesis, will be discussed the determination of SIL value and configuration in SIS at Mutiara Central Gas Plant PT. XX. In accordance with IEC 61508 and IEC 61511, there is a need for hazard risk assessment where the HAZOP and LOPA methods will be used to determine the SIL target, the verification process of the design and configuration of SIS shall also be carried out against the SIL target.  The result of this research, there are 15 SIL 1 and 2 SIL 2 shall be applied for SIS in Mutiara Central Plant where based on verification, configuration 1 out of 1 of Safety Instrumented Function can achieve up to SIL 2 requirement.

Abstrak :
Dalam analisis yang berhubungan dengan waktu ketahanan sering timbul masalah data waktu ketahanan yang tersensor maka diperlukan metode analisis yang memperhatikan masalah sensoring. Waktu ketahanan individu sangat tergantung dari karakteristik-karakteristik individu yang bersangkutan. Dalam Statistik karakteristik-karakteristik ini dapat disebut Kovariat. Salah satu metode analisis yang dapat mengatasi masalah sensoring dengan memperhatikan kovariat individu (yang berupa variable kategorik) adalah Model Coxs Propotional Hazard. Tugas akhir ini membahas model Coxs Proporsional Hazard dengan focus pada Resiko Kegagalan Relatif (kerusakan/kematian) dan Ketahanan (ketahanan hidup/ketahanan pemakaian). Aplikasinya membahas ketahanan pasien penyakit jantung dengan transplantasi dan usia sebagai kovariatnya

Abstrak :
Tingginya angka kecelakaan yang terjadi di Indonesia dalam beberapa tahun terakhir sebagian besar melibatkan pengendara sepeda motor. Kecelakaan yang terjadi di jalan raya antara lain disebabkan oleh kurangnya atensi terhadap hal-hal yang diamati disekitar (visual attention) yang dimiliki ketika mengendarai sepeda motor sehingga terjadi kesalahpahaman pengguna jalan bermotor dalam mengidentifikasi situasi berbahaya (hazard perception). Kepada 133 pengendara sepeda motor berusia 17-34 tahun (Mean usia = 21.56, SD = 2.36) diminta untuk mengisi kuesioner yang mengukur tentang kemampuan visual attention dan kemampuan hazard perception yang terdiri atas komponen hazard detection dan threat appraisal, yang diberikan secara daring. Hasil penelitian menujukkan bahwa tidak terdapat hubungan antara visual attention dan hazard detection maupun antara visual attention dan threat appraisal pada pengendara sepeda motor dewasa muda. Namun ditemukan bahwa adanya hubungan yang positif antara hazard detection dan threat appraisal. Analisis deskriptif menunjukkan kemampuan hazard detection yang cukup baik pada partisipan pengendara sepeda motor, namun kemampuan threat appraisal yang cenderung masih rendah. Implikasi dari temuan ini adalah diperlukannya sosialisasi untuk meningkatkan kesadaran akan pentingnya kemampuan hazard perception. ...... For the past few years, a rising number of accidents in Indonesia involved a significant number of motorcyclists. Some of the accidents are caused by the motorcyclists lack of attention to the surrounding area when riding a motorcycle. Therefore, motorcyclists misinterpret a dangerous situation hazard perception. We asked 133 motorcyclists aged 17-34 (Mage = 21.56, SD = 2.36) to fill in an online questionnaire, which measured visual attention and hazard perception abilities. The hazard perception includes hazard detection and threat appraisal measurement. The result of this study shows that there is no relationship between visual attention and hazard detection, also between visual attention and threat appraisal on young adult motorcyclists. However, we find a positive correlation between hazard detection and threat appraisal. Descriptive analyses show that the participants performed hazard detection quite well, but they indicated a low level of threat appraisal skill. The implication of this study is to encourage socialization to motorcyclists about the importance of hazard perception ability.

Abstrak :
Salah satu sungai yang melintasi kota Depok dan Jakarta adalah sungai Ciliwung. Sungai ini sudah lama diketahui menyebabkan banyak kerugian bagi warga Jakarta terutama saat musim hujan tiba. Hasil ini disebabkan air yang ditampung melebihi kapasitas sungai. Permasalahan lain adalah sering terjadinya kasus tanah longsor pada kedua sisi bantaran sungai. Penelitian ditujukan untuk menentukan zona bahaya tingkat keamanan yang memenuhi syarat bagi penduduk untuk mendiami di sekitar bantaran sungai. Dengan menetapkan tingkat keamanan yang sesuai peraturan, dapat diberikan rekomendasi jarak aman yang terbebas dari daerah longsor. Sehingga kerugian yang diderita oleh penduduk dapat dikurangi seminimal mungkin. Di dalam penelitian ini digunakan alat bantu GIS untuk menentukan daerah longsor dari tingkat keamanan dan probabilitas kegagalan bantaran sungai. Data data yang akan diolah dalam GIS didapat dari MIPA berupa peta kontur bantaran sungai Ciliwung. ......One of the most river which to pass on Depok and Jakarta is Ciliwung River. The river have been known to damage the people of Jakarta on the rainy seoson. The process damage is begin because the flood capacity is over than river capacity. The problem of slide is always to be damage on the flood plain Ciliwung River in Pasar Minggu East Jakarta. The research for to guide zone of hazards to slide with safety factor in agree obtain standart literature on the role. The safety factor to be need for to explain recommended limit zone of the flood plain in safe to live without damage to slide for lack of financial loss. In the research uses a tool with GIS for analyze the contour map to be hazards zone of slide with failure probability and safty factor. Data take giving from MIPA. It is contour map the flood Ciliwung River Pasar Minggu East Jakarta.

Abstrak :
The soil liquefaction potential has been evaluated for the Ariana Region because of its important socio economic interest and its location....

Abstrak :
To develop seismic design criteria for buildings, seismic hazard analysis is required to estimate the ground motion intensity with criteria such as peak ground acceleration (PGA). The seismic hazard can be analyzed by using two approaches: deterministic seismic hazard analysis (DSHA) and probabilistic seismic hazard analysis (PSHA). In these two approaches, the seismic hazard is evaluated from past earthquake events and active faults data. In Thailand, seismic hazard is classified in the low lying regions; however, in recently years, earthquakes have occurred frequently in the North of Thailand. To prevent and reduce damage due to earthquakes in the future, determination of seismic hazard is needed. This research proposes a deterministic seismic hazard map evaluated from nineteen active faults affecting Thailand. Two types of active faults are considered: first, an active fault in a subduction zone and second, a crustal fault. The seismic hazard is evaluated by using a ground motion prediction equation (GMPEs). Four GMPEs are weighted equally for seismic crustal fault, and two GMPEs are weighted equally for a seismic subduction zone. The hypocentral distance is used to evaluate the seismic hazard for all ground motion prediction equations. The Northern part and the Western part of Thailand are high seismic hazard regions, because there are active faults with the large possibility of earthquakes of a maximum magnitude. The seismic hazards in the North, West and Northeast of Thailand are about 0.60 g. The seismic hazard in Bangkok is about 0.25 g due to the Three Pagoda fault and Sri Sawat fault. The seismic hazard in the South of Thailand is about 0.40 g.

Abstrak :
Rapid socio-economic development along with exceptional rainfall can potentially exacerbate risk of flood damage to life and property in the lower Nam Phong River Basin. In relation to this, the non-structural measures including risk-based zoning could be considered as an effective solution in mitigating the flood threat in the future. Thus, a coupling of the hydrological model HEC–HMS and hydrodynamic model HEC–RAS, which increases the robustness and predictability to the overall findings, was applied to assess flood hazard in this study. The outcomes highlighted that the applications of the HEC–HMS and HEC–RAS models are suitable for the study area with the Nash-Sutcliffe Efficiency (ENS) varied between 0.75 to 0.87 and the coefficient of determination (R2) ranged between 0.81 to 0.92. Moreover, the flood zone mapping was also carried out based on the Flood Hazard Rating (FHR) analysis. As a result, the flood hazard areas were determined which covers about 16.5% of the total river basin areas, and it was classified into four zones, i.e. extreme (18.79% of inundated area), high (46.33% of inundated area), moderate (18.24% of inundated area), and low (16.64% of inundated area), respectively. The obtained findings can be useful as the adaptation guideline for water resources planning and flood management in the lower Nam Phong River Basin and other parts of Thailand.

Abstrak :
To develop seismic design criteria for buildings, seismic hazard analysis is required to estimate the ground motion intensity with criteria such as peak ground acceleration (PGA). The seismic hazard can be analyzed by using two approaches: deterministic seismic hazard analysis (DSHA) and probabilistic seismic hazard analysis (PSHA). In these two approaches, the seismic hazard is evaluated from past earthquake events and active faults data. In Thailand, seismic hazard is classified in the low lying regions; however, in recently years, earthquakes have occurred frequently in the North of Thailand. To prevent and reduce damage due to earthquakes in the future, determination of seismic hazard is needed. This research proposes a deterministic seismic hazard map evaluated from nineteen active faults affecting Thailand. Two types of active faults are considered: first, an active fault in a subduction zone and second, a crustal fault. The seismic hazard is evaluated by using a ground motion prediction equation (GMPEs). Four GMPEs are weighted equally for seismic crustal fault, and two GMPEs are weighted equally for a seismic subduction zone. The hypocentral distance is used to evaluate the seismic hazard for all ground motion prediction equations. The Northern part and the Western part of Thailand are high seismic hazard regions, because there are active faults with the large possibility of earthquakes of a maximum magnitude. The seismic hazards in the North, West and Northeast of Thailand are about 0.60 g. The seismic hazard in Bangkok is about 0.25 g due to the Three Pagoda fault and Sri Sawat fault. The seismic hazard in the South of Thailand is about 0.40 g.