Analisis Risiko dan Keamanan Informasi pada Sebuah Perusahaan System Integrator Menggunakan Metode Octave Allegro

PT. XYZ sebagai salah satu perusahaan yang bergerak di bidang System Integrator telah menggunakan teknologi informasi dalam menjalankan aktivitas bisnisnya. PT. XYZ merupakan penyedia solusi teknologi informasi dan komunikasi di Indonesia yang menyediakan layanan pengadaan & implementasi infrastruktur TI serta layanan keamanan teknologi informasi. Aset informasi yang dimiliki PT. XYZ adalah aset informasi internal perusahaan termasuk aset informasi terkait customer. Sehingga dibutuhkan manajemen sistem informasi yang handal dan mendukung prinsip keamanan informasi yaitu kerahasiaan, keutuhan, dan ketersediaan.  Pada tahun 2019 PT. XYZ mengalami insiden serangan ransomware yang mengakibatkan data – data proyek dan data customer ter-enkripsi. Hal ini berdampak terhadap produktivitas & reputasi perusahaan karena kehilangan aset informasi yang diperlukan. Dengan demikian diperlukan penilaian risiko untuk dapat menentukan  strategi mitigasi risiko sebagai langkah manajemen risiko dalam mengatasi dan meminimalisir dampak permasalahan terkait keamanan informasi. Metode penilaian risiko yang digunakan dalam penelitian ini adalah Metode OCTAVE Allegro yang menggunakan 8 tahapan untuk dapat mengidentifikasi, menganalisa dan menentukan pendekatan mitigasi risiko. Penelitian ini mengidentifikasi aset informasi perusahaan berdasarkan pengumpulan data melalui wawancara narasumber PT.XYZ dan observasi. Dengan metode OCTAVE Allegro ditemukan 6 area of concern yang berpotensi menjadi risiko keamanan informasi dimana aset informasi teridentifikasi memiliki skor risiko relative ≥ 30 yang termasuk tinggi dalam rentang skor  matriks risiko.  Dengan demikian, diperlukan penilaian risiko untuk dapat menentukan strategi mitigasi risiko

Hidrograf Satuan: Permasalahan dan Alternative Penyelesaian

Unit hydrograph is one of flood design method that commonly used in Indonesia. Problems emerge in the unit hydrograph application including high rainfall variability both time and space, lack of automatic rainfall data needed for unit hydrograph derivation. However, the output of the catchment system called hydrograph that represent all the phenomena in the system is available. So, effect of rainfall variability on unit hydrograph and the possibility to derive unit hydrograph based on hydrograph data without rainfall data need to be studied. Unit hydrograph derivation is done by using different rainfall input i.e. single station, rainfall catchment and inverse effective rainfall derived based on hydrograph alone. The resulted unit hydrographs are then used for design flood calculation. Results show that the resulted unit hydrographs vary among the different rainfall inputs. The difference in peak relative to unit hydrograph derived based on average rainfall for Bedog, Code and Winongo catchments could reach -18%, -30% and -11%, respectively. This result indicates that in the catchment studied, the rainfall variability is relatively high. However, the difference in flood peak is quite small, that is up to -12% for all the catchments. There is a trend that the station closest to the catchment centroid gives small bias in design flood relative to the design flood computed based on average rainfall

Tingkah Laku Makan Kambing Lokal Persilangan Yang Digembalakan Di Lahan Gambut: Studi Kasus Di Kalampangan, Palangkaraya, Kalimantan Tengah

Central Kalimantan is one of the province passed by equator line. The temperature is relatively hot, during the day time is 32 0C and 23 0C during night time. The average rainfall index is 1900-3100 mm per year. This province has remarkably wide peatland area with strong acidity, high organic matter, and low fertility for plant cultivation. Various existing vegetation can be used as feed. Goats are able to utilize many type of grasses, leaves and tree bark. They have high ability to adapt various environments and eat many type of plants. Due to their browsing ability, goats can utilize tall bushes. The objective of this experiment was to study grazing behaviour of Crossed Local goats. The Pattern of grazing behaviour of goats can be used as a basis for managing animals and range land on the peatland areas. The experiment used 5 male goats aged 8-12 months and 5 females aged 10-24 months. Recording methode used One Zero with 15 minutes intervals. Data were analysed using Comparison of Two Samples or t-Test (t student) at level 5%. Result of research indicated that the goat activity in day time (09.00-16.00) was dominated by grazing activity (male 66,28%, female 60,82%). The goats spent more time for eating in the morning and evening (09.00-10.00 and 13.00-16.00). Grazing rumination and resting activities during investigation between male and female were not significantly different. Browsing is the most activity observed compared to other activities. Crop types are diverse in peatland areas. The result show that sasendok vegetation (Plantago mayor), Delingu (Dianella ensifolia sp.) and Kelakai (Stenochlaena palustris) were the most preferred vegetation by the goats on the peatland areas

Pengaruh Jumlah Stasiun Hujan terhadap Kinerja Metode Storage Function dalam Penentuan Debit Banjir Rancangan

Storage Function Method is a method applied in discharge calculation with consideration on catchments characteristics. This method is commonly used in Indonesia by the Japanese experts. The discharge calculation provided by the method is highly influenced by the catchments rainfall, thus the difference of rainfall station number will effect the accuracy of the calculation result. The objective of this study is to investigate the effect of difference in the number of rainfall stations on the value of model parameters as well as the accuracy of discharge calculation using the storage function method on Kali Madiun Basin. Basically, the concept used in the storage function method is a water balance, which is analyzed using the mathematical model. The data used in this research are the 10 days hourly rainfall during the flood, and the catchment characteristics constant as the model parameters. Using the trial procedure, the catchments characteristics constant as the input for each of the numbers of rainfall station (2;3;4;5;6; and 7 stations) will provide the 10 days hourly discharge, then the result will be calibrated to the observed data. Based on the calibration result, the smallest deviation of each rainfall station will be selected in order to identify the model parameter and to provide deviation of the observed data. The investigated deviation is the different value between the calculated and the observed runoff, includes volume deviation as well as the 10 days hourly discharge deviation, which are located at the control node of AWLR Sekayu and AWLR A. Yani. Based on the calibration results, it is shown that the largest volume deviation at AWLR Sekayu is 31.64% that occurs on 2 rainfall stations, while the smallest occurs on 6 rainfall stations with deviation of 17.43%. It is also shown that the largest discharge is 37.29% and occurs on 2 rainfall stations, while the largest and the smallest discharge deviations respectively are 36.7% that occurs on 2 rainfall stations and 26.39% that occurs on 7 rainfall stations. Based on the results, it is shown that although the largest number of rainfall station is not the most accurate, but in general, as shown in the graphical results, it is indicated that more numbers of rainfall stations tend to provide better accuracy

ANALISA PERFORMA HEAT EXCHANGER DENGAN PENAMBAHAN VORTEX GENERATOR TIPE DELTA WING DAN DELTA WINGLET TAPE INSERT GUNA MENGATASI ICING PADA KARBURATOR PISTON ENGINE

The simple simulation tool of the heat exchanger has a limitation, that is, when the heat transfer process cannot be analyzed directly, and the flow motion cannot be observed. Therefore it can be solved by the CFD method. The purpose of this study is to provide observable visual images. In this simulation, it uses a tube given a vortex generator with delta variations adding angles, each of which is given a constant inlet velocity, inlet temperature, and heatflux input values. Each angle is given a value of 200, 400, 600. This study aims to obtain a vortex generator with the best angular variation. From the research that has been carried out, it shows that the addition of delta provides a difference in the results of each specimen tested, the addition of a delta winglet with the addition of an angle of 400 is produced to have the best heat transfer coefficient, it is shown at a low temperature difference (ΔT). Analysis of the results of a low temperature difference (ΔT) means that the specimen performed good heat transfer performance.Alat simulasi sederhana heat exchanger memiliki keterbatasan, yaitu pada saat proses perpindahan panas tidak dapat dianalisis secara langsung, dan gerak aliran tidak dapat diamati. Oleh karena itu bisa diselesaikan dengan metode CFD. Tujuan dari penelitian ini adalah untuk memberikan gambar visual yang dapat diamati. Pada simulasi ini menggunakan tube yang diberikan vortex generator dengan variasi delta penambahan sudut, masing masing diberikan nilai input inlet velocity, inlet temperature, dan heatflux yang konstan. Tiap sudutnya diberikan nilai sebesar 200, 400, 600. Penelitian ini bertujuan untuk mendapatkan vortex generator dengan variasi sudut yang paling baik. Dari penelitian yang telah dilakukan menunjukan dengan adanya penambahan delta memberikan perbedaan pada hasil tiap spesimen yang diujikan, penambahan winglet delta dengan penambahan sudut 400 dihasilkan memiliki koefisien perpindahan kalor yang paling baik, hal itu ditunjukan pada perubahan temperatur (ΔT) yang rendah. Analisis dari hasil perubahan temperatur (ΔT) yang rendah mengartikan bahwa spesimen tersebut melakukan kinerja perpindahan kalor yang baik

Kajian Variabilitas Curah Hujan Di Kawasan Lereng Gunung Merapi Dengan Uji Mann-kendall

Rainfall is one of hydrology components that may be affected by climate change. The change of rainfall pattern can cause much impact on many fields. Many researches about global and regional climate change projection have been conducted. However, research about local scale of climate change based on climate character in local area is still necessary for a better result. Area of this research cover southwest slope of Merapi Mount, Java Island, Indonesia. Automatic rainfall data records from 1989 until 2008 of nine rainfall gauges in Merapi Mount's southwest slope is available. Those data series this research is only adequate for climate variability analysis. The methods to detect trends in this research is non parametric test (Mann-Kendall test). The results show that at level of significance 5%, trend of rainfall in Mt. Merapi slope area is statistically not performing a specific pattern. Wet season occur every November until April while dry season occur every May until October. Neglect of trend signification, annual rainfall has decreace tendency. Rainfall amount in the beginning of wet season has increase tendency while rainfall amount in the middle of wet season and dry season have decreace tendency. Maximum daily and hourly rainfall also have decreace tendency.Spatially, annual rainfall and maximum daily rainfall increased from lower to higher elevation, from east to west and from south to north

Studi Alternatif Pengendalian Banjir Sungai Tondano di Kota Manado

Tondano River, along with its tributary Tikala River, is very potential to cause flood in Manado City. There were three big floods occurred in 1996, 2000 and 2005. In order to mitigate the damage risk due to flood, the controlling effort that can be applied soon in the field is required through short term flood control plan using structural measures. The feasible alternative plans should be evaluated to define the best plan based both on the hydraulics point of view and their effects on the river uses. The study is carried out through the 5 year return period flood routing using the version 3.1 HEC-RAS software. The selected design flood hydrograph is obtained using Nakayasu Synthetic Unit Hydrograph method by elaborating design rainfall derived from partially series rainfall data frequency analysis of Tondano and Tikala watersheds. Flow simulation is conducted in steps by modeling the hydrograph from Tikala River as the lateral inflow. The first simulation is carried out using bank full capacity discharge to define the flood characteristic and the critical sections. The second simulation is carried out for the design flood hydrograph using unsteady flow calculation on each plan to study the hydraulics feasibility. The study conducted herein is elaborated on water surface profile and velocity due to the plans affectivity to carry-off the flood discharge safely as well as the effect on river uses. Based on the existing condition simulation, result shows two reach critical sections of the right bank and one reach critical section of the left bank Tondano River. The results of flood control simulation indicate that there are no significant differences on velocity among plans, but there are disparities on the capacity to carry off flood discharge safely with no overtopping. For the normalization plan, the overtopping is occurred along the critical section, whereas for both dike plan and combination of dike and normalization plan, no overtopping are occurred but the the critical sections are still existed. Revised plans for dike and combination of dike and normalization are equally effective in carrying off flood discharge securely, but have different effects on water utilization during low flow period. Referring to the study result, the best alternative is the revised dike plan