A Study and Estimation a Lost Person Behavior in Crowded Areas Using Accelerometer Data from Smartphones

As smartphones become more popular, applications are being developed with new and innovative ways to solve problems in the day-to-day lives of users. One area of smartphone technology that has been developed in recent years is human activity recognition (HAR). This technology uses various sensors that are built into the smartphone to sense a person\u27s activity in real time. Applications that incorporate HAR can be used to track a person\u27s movements and are very useful in areas such as health care. We use this type of motion sensing technology, specifically, using data collected from the accelerometer sensor. The purpose of this study is to study and estimate the person who may become lost in a crowded area. The application is capable of estimating the movements of people in a crowded area, and whether or not the person is lost in a crowded area based on his/her movements as detected by the smartphone. This will be a great benefit to anyone interested in crowd management strategies. In this paper, we review related literature and research that has given us the basis for our own research. We also detail research on lost person behavior. We looked at the typical movements a person will likely make when he/she is lost and used these movements to indicate lost person behavior. We then evaluate and describe the creation of the application, all of its components, and the testing process

Design of a Control System for Active and Reactive Power Control of a Small Grid‐Connected Wind Turbine

Reactive power flow between a wind turbine system and the grid is an important issue especially when the wind turbine is connected to a remote grid. In this research, a control system has been developed that allows wind turbine to provide reactive power to the local load connected between the grid and the wind turbine. The supplied reactive power from the wind turbine is controlled by changing the phase angle of Pulse Width Modulation (PWM) in the wind turbine inverter. A proportional controller is used to maintain the reactive power supplied by the wind turbine. Another PI controller is used to maintain the wind turbine operation at an optimum tip speed ratio (TSR) to extract maximum power from the wind. The proposed system along with all sub‐systems has been modelled and simulated in Matlab/ Simulink. The simulation results confirm that the designed system is able to control the wind turbine and capable of providing the required reactive power. Results show that the designed system is able to maintain the system power factor close to unity for a range of wind speeds

Well-being of medical students and their awareness on substance misuse: a cross-sectional survey in Pakistan.

Objective: To investigate psychological well-being and substance abuse among medical students in Pakistan. Methods: A cross-sectional questionnaire-based survey was conducted in six medical colleges across Pakistan. Final-year medical students were interviewed by either a postgraduate trainee in psychiatry or a consultant psychiatrist. Results: A total of 540 medical students were approached, 342 participated and the response rate was 64.5%. Mean age was 23.73 years (SD 2.45 years), 52.5% were male and 90% single. Two out of every five respondents reported that work/study at medical school affected their personal health and well-being. A considerable proportion of students were aware of alcohol and smoking as coping strategies for stress in medical students. The main factors causing stress were heavy workload (47.4%), relationship with colleagues (13.5%) and staff (11.9%). A total of 30% reported a history of depression and 15% among them had used an antidepressant. More than half were aware of depression in colleagues. The majority of respondents said that teaching provided on substance misuse in the areas of alcohol and illegal drugs, management/treatment of addiction, and models of addiction was poor. There was significant association (p = 0.044) between stress and awareness about alcohol as a coping strategy for stress among medical students. A significant negative association was also found between medical colleges in public sector (p = 0.052), female gender (p = 0.003) and well-being. Conclusion: The majority of the medical students reported a negative impact of heavy workload on their psychological well-being. Significant numbers of medical students think that substance misuse is a coping strategy for stress. Teaching on addiction/addictive substances is poor at undergraduate level in Pakistani medical colleges

Development and characterisation of disulfiram-loaded PLGA nanoparticles for the treatment of non-small cell lung cancer

Non-Small Cell Lung Cancer (NSCLC) is the most common type of lung cancer in both men and women. A recent phase IIb study demonstrated that disulfiram (DSF) in combination with cisplatin and vinorelbine was well tolerated and prolonged the survival of patients with newly diagnosed NSCLC. However, DSF is rapidly (4 min) metabolised in the bloodstream and it is this issue which is limiting its anticancer application in the clinic. We have recently demonstrated that a low dose of DSF-loaded poly(lactic-co-glycolic acid) (PLGA) nanoparticles supplemented with oral Cu inhibited tumour growth and reduced metastasis in a xenograft mouse lung cancer model. Here we demonstrate the influence of PLGA polymer, stabilizer loading and molecular weight as well as sonication time on the characteristics, including DSF release and the cytotoxicity of 10% w/w DSF-loaded PLGA nanoparticles. The paper demonstrates that the choice of PLGA as no significance on the characteristics of the nanoparticles apart from their DSF release, which is due to the differing degradation rates of the polymers. However, increasing the loading and molecular weight of the stabilizer as well as the sonication time reduced the size of the nanoparticles, reduced their ability to protect the DSF from reacting with Cu and degrading in serum, while increasing their DSF release rate and cytotoxicity. Additionally, increasing the sonication time resulted in the premature degradation of the PLGA, which increased the permeability of the nanoparticles further decreasing their ability to protect DSF from reacting with Cu and degrading in serum, while increasing their DSF release rate and cytotoxicity

Modelling and simulation of electric drive vehicle based on space vector modulation technique and field oriented control strategy

Recently, the electric vehicle has emerged as a powerful platform for mitigating energy crisis and reducing environmental pollution in the transportation sector. The major drawbacks of electrically powered automobile that limits its competitiveness with the internal combustion engine counterpart are the vehicle driving range and battery energy capacity. Hence, limited energy storage warrants the need for an effective and efficient energy utilisation in the overall system. This paper uses Field Oriented Control algorithm and Space Vector Modulation technique to enhance and to optimise energy saving at the same time improve the vehicle induction motor efficiency. A simple electric vehicle drive with vehicle dynamic and tractive loads for motor driving load were modelled and simulated using Matlab/Simulink. Simulation results show that modelled vehicle speed satisfied the acceleration index for the electric vehicle

Optimal operational policies in batch distillation

Imperial Users onl

Penyederhanaan Perizinan Usaha di Daerah

Izin usaha merupakan tahapan awal yang harus diurus sebelum sebuah unit usaha didirikan dan berjalan. Banyaknya izin-izin usaha di daerah yang pada hakekatnya mengatur fungsi yang sama dan seluruh izin tersebut harus dimiliki pengusaha. Hal ini tentu akan menghambat aktivitas usaha, karena banyaknya izin yang diurus. Permasalahan ini terjadi karena banyak regulasi nasional yang menjadi acuan dan mewajibkan izin-izin tersebut dilaksanakan di daerah. Studi ini hendak menjawab dua pertanyaan penting sebagai berikut: 1. Regulasi nasional apa saja yang tumpang tindih dan menyebabkan banyaknya jumlah izin di daerah? 2. Regulasi nasional apa saja yang dapat disederhanakan, dihapus dan digabungkan untuk menyederhanakan izin-izin di daerah? Studi ini bertujuan untuk: 1. Menganalisis dan mereview regulasi nasional yang menyebabkan banyaknya jumlah izin di daerah. 2. Menganalisis regulasi perizinan di tingkat nasional sebagai dasar bagi rekomendasi penyederhanaan, penghapusan dan penggabungan perizinan oleh Pemerintah Pusat. Studi ini diharapkan dapat memberikan manfaat yaitu sebagai berikut: 1. Menjadi bahan rekomendasi bagi pemerintah pusat dalam melakukan deregulasi perizinan tingkat nasional. 2. Mengangkat contoh dari daerahdaerah yang melakukan best practice di bidang penyederhanaan perizinan, serta memberikan masukan terkait dengan sistem perizinan untuk replikasi di daerah lainnya. 3. Sebagai bahan advokasi pelaku usaha maupun masyarakat kepada para pemangku kebijakan di daerah untuk melakukan perbaikan di bidang perizinan usaha

Optimization of output coupling ratio on the performance of a ring-cavity Brillouin–erbium fiber laser

The operation of a single-wavelength Brillouin-erbium fiber laser (BEFL) system with a Brillouin pump preamplified technique for different output coupling ratios in a ring cavity is experimentally demonstrated. The characteristics of Brillouin Stokes power and tunability were investigated in this research. The efficiency of the BEFL operation was obtained at an optimum output coupling ratio of 95%. By fixing the Brillouin pump wavelength at 1550 nm while its power was set at 1.6 mW and the 1480 pump power was set to its maximum value of 135 mW, the Brillioun Stokes power was found to be 28.7 mW. The Stokes signal can be tuned within a range of 60 nm from 1520 to 1580 nm without appearances of the self-lasing cavity modes in the laser system

Analisis Rantai Nilai Usaha Kakao sebagai Produk Unggulan Kabupaten Donggala - Sulawesi Tengah

Dari latar belakang di atas, maka pertanyaan yang akan dijawab melalui penelitian ini adalah: 1) Bagaimana gambaran umum usaha kakao di Kabupaten Donggala? 2) Bagaimana permasalahan setiap rantai nilai usaha kakao di Kabupaten Donggala? 3) Bagaimana rencana tindak lanjut pengembangan kakao di Kabupaten Donggala? Tujuan penelitian ini adalah sebagai berikut: 1) Menjelaskan gambaran umum usaha kakao di Kabupaten Donggala. 2) Menganalisis permasalahan yang terjadi pada setiap rantai nilai kakao di Kabupaten Donggala. 3) Merumuskan rencana tindak lanjut atau intervensi untuk setiap permasalahan di tiap mata rantai nilai dan pengembangan iklim usaha kakao di Kabupaten Donggala. Hasil penelitian ini diharapkan dapat menyediakan informasi mengenai permasalahan dan analisis stakeholder di setiap rantai nilai kakao sebagai produk unggulan di Kabupaten Donggala. Harapannya, hasil penelitian ini menjadi masukan kebijakan yang memadai untuk meningkatkan iklim usaha dan mengembangkan kakao sebagai produk unggulan di Kabupaten Donggala. Selain itu, penelitian ini diharapkan dapat membantu mengidentifi kasi titiktitik penting bagi penguatan kapasitas pelaksanaan di lapangan dalam kerangka pengembangan iklim usaha khususnya peningkatan agribisnis produk unggulan