Analisis Hidraulika Banjir Tukad Badung

There is densely populated residence along Tukad Badung reach resulting in the misuse of stream for waste disposal outlet. This condition causes the stream becoming the disposal place of waste, household sewage, and industrial waste. Also, there is erosion and sliding of river bank in the upstream. This condition also causes river reaches to shallow due to sedimentation resulting in the decrease of stream capacity to carry off the flood discharge. During recent years, Tukad Badung has been degraded in its function due to various factors occurring from the upstream to downstream resulting in the stream incapable to carry off the flood discharge optimally. The change of land use occurred in the watershed causes the change in stream flow pattern that can be seen from the high discharge fluctuation during rainy and dry seasons. The objective of this study is to observe 50 year return period flood water surface profile and to determine the flood control alternatives. Hydrology and hydraulic analyses are carried out in the study. Hydraulic modeling of the river system is accomplished using the Hydrologic Engineering Center-River Analysis System (HECRAS) software of version 3.1.2. The stream is assumed to be a single reach using the upstream boundary at AWLR Wangaya and downstream boundary at Nusa Dua estuary dam. The geometric input is conducted for the existing, normalization, and dikes conditions, whereas the flow hydrograph and rating curve are using for upstream boundary and the downstream boundary respectively. Based on the result of hydraulic analysis, the overtopping is occurred at 27 River Stations at the left bank and 23 River Stations at the right bank. The flood controlling by normalization is capable of decreasing flood water surface with the non existence of overtopping both at the left and right banks. The flood controlling by dike is also capable of retaining the flood discharge without the overtopping at the left and right banks. That can be concluded, by normalization or by dike the Tukad Badung is capable of carrying off the 50 year return period flood discharge. Calculation results shows the flood controlling by dike requires cost of Rp 1.118.376.638,35,- and by normalization requires cost of Rp. 1.316.571.000,00,-

Pengaruh Gelombang Pada Profil Kemiringan Pantai Pasir Buatan (Uji Model Fisik Dan Studi Kasus Penanggulangan Erosi Serta Pendukung Konservasi Lingkungan Daerah Pantai)

Masalah utama di daerah pantai adalah erosi pantai yang terjadi akibat gempuran gelombang serta pembangunan konstruksi yang tidak akrab lingkungan. Salah satu USAha pengembangan daerah pantai yang sedang dan telah dilaksanakan adalah pembangunan pantai buatan (artificial beach nourishment). Pada tulisan ini disajikan hasil penelitian yang bertujuan untuk mengetahui pengaruh karakteristik gelombang (tinggi gelombang H, periode gelombang T dan panjang gelombang L) terhadap Equilibrium Beach Profile (EBP) atau final slope (nf) (profil) yang terbentuk terutama pada area swash zones.Uji model fisik 3-D dilakukan terhadap material penyusun pantai berupa pasir (d50 = 0,467 - 1,2 mm), dengan bangunan pelindung berupa gabungan groin I dan L. Model pantai pasir di tempatkan pada kolam gelombang, dengan initial slope (n = 6) dan dikenai gelombang reguler konstan hingga kondisi EBP tercapai. Untuk setiap model uji dilakukan variasi tinggi gelombang (H) dan periode gelombang (T).Hasil penelitian menunjukkan EBP atau profil kemiringan stabil yang terbentuk dipengaruhi oleh karakteristik gelombang. Pada area terbuka, semakin besar H0/L0, profil yang terbentuk akan bergeser dari swell profile menjadi storm profile, yang ditunjukkan oleh terjadinya bar. Jika H0/L0 semakin besar, pantai akan semakin tegak (nilai nf semakin kecil), hal ini identik dengan hasil penelitian 2 D dan studi kasus di pantai Sanur, Bali yang dilakukan Setyandito dkk. (2010) serta kajian teoritis dari penelitian sebelumnya. Landai akhir, nf yang terbentuk pada area terbuka pada hasil penelitian ini memiliki nilai 3 hingga 12

Decreasing Medical Complications for Total Knee Arthroplasty: Effect of Critical Pathways on Outcomes

BACKGROUND: Studies on critical pathway use have demonstrated decreased length of stay and cost without compromise in quality of care. However, pathway effectiveness is difficult to determine given methodological flaws, such as small or single center cohorts. We studied the effect of critical pathways on total knee replacement outcomes in a large population-based study. METHODS: We identified hospitals in four US states that performed total knee replacements. We sent a questionnaire to surgical administrators in these hospitals including items about critical pathway use and hospital characteristics potentially related to outcomes. Patient data were obtained from Medicare claims, including demographics, comorbidities, 90-day postoperative complications and length of hospital stay. The principal outcome measure was the risk of having one or more postoperative complications. RESULTS: Two hundred ninety five hospitals (73%) responded to the questionnaire, with 201 reporting the use of critical pathways. 9,157 Medicare beneficiaries underwent TKR in these hospitals with a mean age of 74 years (± 5.8). After adjusting for both patient and hospital related variables, patients in hospitals with pathways were 32% less likely to have a postoperative complication compared to patients in hospitals without pathways (OR 0.68, 95% CI 0.50-0.92). Patients managed on a critical pathway had an average length of stay 0.5 days (95% CI 0.3-0.6) shorter than patients not managed on a pathway. CONCLUSION: Medicare patients undergoing total knee replacement surgery in hospitals that used critical pathways had fewer postoperative complications than patients in hospitals without pathways, even after adjusting for patient and hospital related factors. This study has helped to establish that critical pathway use is associated with lower rates of postoperative mortality and complications following total knee replacement after adjusting for measured variables

Analyzing Customer Satisfaction: Consumer Behavior towards the Selection of Beauty Products in Klang Valley

In Malaysia, the beauty and health industry is growing very rapidly. Malaysians are expected to spend about RM9.61 billion yearly on cosmetics and toiletries products by 2019. Beauty industry becomes prominent in the worldwide market place because of the dynamic involvement of male and female consumers who started to use beauty products more frequently. The patterns of consumer behaviours are always varying, so the marketers require to identify the users’ purchase decision to attract or retain the customers. In addition, customer satisfaction is critical issues to the companies because it can have influences on customer retention. The main purpose of this study is to define the factors that can influence consumer behaviour towards the selection of beauty products. Some of the factors consist of social factor, personal factor, psychological factor, technological factor and Korean Wave influence. Besides that, this study also aimed to determine the satisfaction level of the beauty customers. The outcomes of this study would be beneficial to the marketers to identify the exact factors that can influence the Malaysian’s consumer behaviours towards the beauty products. A descriptive research study was adopted in this research study to analyse research objectives. The respondents were chosen based on two sampling techniques which are convenient sampling and purposive or judgemental sampling. The questionnaire will be used to collect data from the respondents to achieve the research objectives and 213 questionnaires also distributed among the beauty consumers in Klang Valley. Based on the results, the four factors except technological factors have a significant relationship with consumer behaviour towards the selection of beauty products. Moreover, the personal factor is the most influential factor in beauty consumer behaviour. The study also shows that majority of the respondents were satisfied with the beauty products that they purchased or used

Privacy Risk of Personal Information Exposure

Customers’ individual private information are collected to gain valuable information. Through business analytics companies gain competitive advantage in making decisions. However, some irresponsible companies sell customer’s data to third party for illegal activities. This caused distrust and lack of confidence among consumers in revealing their private information. Due to customer reluctant in disclosing their information, this may hinder the growth of e-commerce. Therefore, the purpose of this study is to investigate consumer sensitivity towards data privacy. This research adopted a research framework based on ‘Concern for Information Privacy’ (CFIP) dimensions to further conducted the study. This study has tested relationship using five independent variables. A total number 384 data were collected from respondents using questionnaire. Regression was employed to analyse the relationship between identified variables. Result found that collection, unauthorized secondary internal use, unauthorized secondary external use, improper access and errors have a positive influence on consumer sensitivity towards data privacy. Furthermore, the effects of unauthorized secondary internal use on consumer sensitivity towards data privacy is found to be significantly greater

Measurement of long shore current after permeable groin by floating object

Measurement of long shore current before and after permeable groin structure installation is difficult especially in hydraulic model of small water depth. The problems arise that no instrument is dedicated to measure such current at very small depth and long shore current varies quite significantly from the location of breaking wave to the\ud maximum run up position. Measuring instruments that can be used to measure the long shore currents on a laboratory scale is very limited. Measurement of long shore current using floating objects is a method to overcome the limitations of measuring instruments of longs shore current. Floating objects arranged width surf zone and then was dropped by observing the position of the wave. Then the movement of floating objects was recorded by using a video camera. The magnitude of long shore current velocity obtained from the observation of movement distance of floating objects per\ud time unit. The results of measurements of long shore current by floating objects was verified by the results of calculations using the equations of long shore current (equation Longuet-Higgins, 1970). Verification of the measurement results with the results of calculations indicate relatively similar results, so the floating objects method can be recommended for the measurement of long shore current

Development of combined vector and torque control methods for independent two induction motor drives

Many applications use two or more motors operating in parallel configuration by using one variable speed drive. This system is able to control these multiple motors at the same desired motor speed operation which provide advantages in terms of components and cost reduction. However, the system is not able to control each motor separately if it is desired to operate at different speeds and it also cannot withstand the load disturbance. To address this problem, the design of combined Vector Control-Direct Torque Control (DTC) methods is proposed and their performance is investigated for the case of independent controlled two induction motors fed by single Five Leg Inverter (FLI) method. Double Zero Sequence (DZS) Injection Method Space Vector Pulse Width Modulation (SVPWM) scheme is used for the FLI. Simulation results from the Simulink/Matlab that verify the validity of the method are also included. The results show the ability of the proposed method to control motor speed independently under forward-reverse step speed command and load disturbance condition

A Note on Redesign Material Substitution and Topology Optimization in a Lightweight Robotic Gripper

The gripper is required because it is the portion of the robot that makes direct contact with the object being grasped. It should weigh as little as possible without compromising functionality or its performance. This study aims to reconsider the construction of a lightweight robotic gripper by modifying the gripper's materials and topology. Using the finite element (FE) method, several types of gripper materials were evaluated for static stress. On the basis of the results of the FE analysis, the optimal material candidate was chosen using the weighted objective method. Using the Fusion 360 software, the topology of the selected material was then optimized in an effort to achieve the 40% weight reduction’s objective. In addition, the suggested optimized geometry is then fine-tuned so that it can be manufactured as efficiently as possible. The final step in the validation of the robotic gripper's design was stress static analysis. The revised gripper design has a mass of 0.08 kg, a reduction of 94% from the original mass, and a safety factor of 3.67%, which satisfies the desired level of performance for the robotic gripper. Utilizing different materials and optimizing the gripper's topology can significantly reduce the overall mass of a robotic gripper. &nbsp

Numerical analysis of velocity magnitude on wave energy converter system in perforated breakwater

Waves are an alternative energy source that can be used for electricity generation. Wave Energy Converter (WEC) system in perforated breakwater is potentially applicable WEC system for coastal area. The magnitude of wave energy generated is determined by the volume of sea water inside the perforated breakwater. This volumetric flow rate is calculated using the flow velocity at perforated holes on the structure slope. Therefore, this research aims to study the velocity magnitude by analyzing the interrelation among wave steepness, wave run-up and relative velocity. The method used consists of applying numeric 3D flow model in the perforated structure of the breakwater with the variation of wave height, wave period and structure slope. The result shows that, the steeper the structure, the bigger is the relative run up (Ru/H). The higher the relative run up, the higher are the relative run-up velocities (V/Vru). As the velocity increase, the volumetric flow rate inside perforated breakwater will be higher, which leads to higher wave energy. Hence, it can be concluded that the higher the velocities (V/Vru), the higher is the wave energy generated