Unsteady Magnetohydrodynamics oscillating flow of third order fluid with central free stream velocity

In this article the unsteady magnetohydrodynamics oscillating flow of third order fluid with free stream velocity is proposed. It is found that the motion equation is controlled by five dimensionless parameters namely the coecostic parameter 4, viscoelostic parameter ?,acceleration/deceleration c,suction/blowing d and material constants ? . The effect of each of these parameters upon the velocity distribution is analysise

Effect the Magnetic field over an inclined stretching sheet of three dimensional Maxwell fluid in obscene of Mixed convection

Three dimensional flow of Maxwell fluid with boundary condition is investigated. transformations are victimized to reduce the partial differential equations into ordinary differential equations. Effect of two parameters ,Magnatic  field parameter and Deborah number parameter on  non dimensional velocity  are discussed ,homotopy  analysis method(HAM) is used to solve the velocity equations. Keywords: steady flow , Maxwell fluid ,  Magnetic field, HAM solution

Brain computer interface based smart keyboard using neurosky mindwave headset

In the last decade, numerous researches in the field of ‎electro-encephalo-graphy (EEG) and brain-computer-interface ‎‎(BCI) have been accomplished. BCI has been developed to aid ‎disabled/partially disabled people to efficiently communicate ‎with the community. This paper presents a control tool using ‎the Neurosky Mindwave headset, which detects brainwaves ‎‎(voluntary blinks and attention) to form a brain-computer ‎interface (BCI) by receiving the system signals from the frontal lobe. This paper proposed an alternative computer input device ‎for those disabled people (who are physically challenged) ‎rather than the conventional one. The work suggested to use ‎two virtual keyboard designs. The conducted experiment ‎revealed a significant result in developing user printing skills ‎on PCs. Encouraging results (1.55-1.8 word per minute ‎‎(WPM)) were obtained in this research in comparison to other ‎studies

Penggunaan Metode Branch And Bound dan Gomory Cut dalam Menentukan Solusi Integer Linear Programming

Integer Linear Programming adalah sebuah model matematis yang memungkinkan hasil penyelesaian kasus pada Pemrograman Linier berupa bilangan bulat. . Masalah integer linear programming termasuk salah satu bagian riset operasi yang sangat penting karena dalam kehidupan sehari-hari, ada banyak permasalah pemrograman linear yang mengharuskan solusinya integer. Ada beberapa metode untuk menyelesaikan persoalan Integer Programming, tapi yang akan dibahas pada penelitian ini adalah Metode Branch and Bound dan Metode Gomory Cut. Tujuan dari penelitian ini adalah untuk menentukan solusi masalah Integer Linear Programming dan membandingkan hasil yang diperoleh dari Metode Branch and Bound dengan Metode Gomory Cut. Penelitian ini adalah penelitian kepustakaan yang menggunakan berbagai literatur-literatur yang berkaitan dengan topik yang akan diteliti. Hasil penelitian ini menunjukkan solusi yang diperoleh dari metode Branch and Bound samadengan metode Gomory Cut. Dalam pemecahannya metode Branch and Bound memerlukan banyak iterasi simpleks dibanding metode Gomory Cut

Solusi Numerik Model Umum Epidemik Susceptible, Infected, Recovered (SIR) Dengan Menggunakan Metode Modified Milne-Simpson

Model Epidemik Susceptible, Infected, Recovered (SIR) merupakan salah satu metode yang paling banyak digunakan untuk memodelkan penyebaran penyakit. Model ini biasa digunakan untuk simulasi dan ptediksi jumlah kasus penyakit tertentu. Dalam artikel ini penulis melakukan simulasi dan mencari solusi numerik model umum epidemik SIR dengan menggunakan MMetode Modified Milne Simpson yang dipadukan dengan metode Runge Kutta Orde 4. Metode ini merupakan salah satu metode prediktor korektor yang biasa digunakan untuk mencari solusi numerik persamaan diferensial. Dengan menggunakan parameter miu=0,1;lamda=0,0098; gamma=0,5 diperoleh r0=0,016333<1. Kurva kelas Infected menuju nol dan setimbang dititik nol. Hal ini menandakan, dengan pemilihan parameter seperti itu, kelas Infected akan menghilang dari populasi. Berdasarkan hasil simulasi, dapat disipulkan bahwa metode Milne Simpson layak digunakan untuk menentukan solusi numerik model umum epidemik SIR

Coverage of Food Security and Environmental Sustainability Issues in Saudi Arabias Electronic Press

This study aimed to investigate the importance of food security and environmental sustainability in achieving the goals of Vision 2023 in Saudi Arabia. Data was collected using a survey approach with a questionnaire administered to 200 male and female students at different educational stages in the Faculty of Education at King Faisal University. Results showed that 82.5% of the total sample read Saudi electronic newspapers for at least one hour a day, with 14% reading for 1-3 hours, and 3.5% reading for three or more hours per day

A Case Report of Malignant Peripheral Nerve Sheath Tumor of the Breast

BACKGROUND AND OBJECTIVE: Breast sarcomas may be primary or secondary. Primary sarcoma of the breast is one of the extremely rare cases of breast malignancies whose possibility of occurrence is estimated to be 0.5 of all types of breast cancers and less than 5 of the all sarcomas .In this study, we present a woman with a malignant peripheral nerve sheath tumor in the brest. CASE REPORT: A 40-year old woman with a painless palpable mass in the right breast refered to imam khomeini hospital of one year ago. According to mammography and cytology and with the possibility of breast cancer patient undergoing surgery and the mass was removed. Histopathology feature and positive immunohistochemical markers such as S100 and vimentin confirmed malignant peripheral nerve sheath tumor of the breast (Triton type).Patient after mastectomy , radiation and chemotherapy regimen received and now, after 12 months no recurrence or metastasis has been seen. CONCLUSION: In breast cancer tumors, early diagnosis and appropriate therapeutic such as surgery , radiotherapy and chemotherapy are recommended to incrase overall survival and improve their quality of life

APPLICATION OF THERMAL ENERGY HARVESTING IN POWERING WSN NODE WITH EVENT-PRIORITY-DRIVEN DISSEMINATION ALGORITHM FOR IOT APPLICATIONS

Energy Harvesting (EH) has become a crucial part of self-powered autonomous systems, particularly for Wireless Sensor Network (WSN) nodes and the Internet of Things (IoT) sensors. The main advantages of exploiting Energy Harvesting approach lies on its portability, scalability, and low maintenance, as it reduces the dependency on batteries, therefore offers a sustainable and long-term solution for wireless monitoring over a wide area and a large number of sensor nodes. This paper discusses the use of Thermal Energy Harvesting (TEH) approach to power up a wireless sensor node for IoT applications. Wireless node WSN_1_TEH consists of MEGA328P as the main MCU, nRF24L01 wireless module, and DHT22 sensor. The TEH system consists of two thermoelectric generators with DC-DC boost converter based on MAX757 and an 8200µF storage capacitor. In the experiment, the TEH system was set to function as the only power source for the sensor node; for comparison of its performance with a 7.4 V rechargeable lithium polymer battery-powered counterpart, by operating for 40 hours continuously. In order to reduce power consumption, the WSN_1_TEH node was equipped with an energy-aware EventPriority-Driven Dissemination algorithm. It was developed to manage the WSN_1_TEH operation and to make the sink station able to detect a missing wireless node within the network, which will guarantee the nodes integrity detection. This algorithm will send out data packet based on event or priority, every 20 s of sleeping period. Besides power saving, it also reduces the overall network traffic. Based on the findings, the overall power consumption of this node is 39 mW in “active with transmission” mode, 28-32 mW in “active without transmission” mode, and only 23 mW when operating in “sleep” mode

AN INVESTIGATION OF THE POWER CONSUMPTION OF 315 MHz RF ASK TRANSMITTER AND RECEIVER MODULES FOR WIRELESS SENSOR NETWORK NODE

Sensor node in WSNs is the major bottle neck that restricts WSNs realization due to limited processing, communication ability and power sources. The communication or wireless transmission unit has noticeable effects on wireless sensor node system, since its power consumption is dependent on the transferred data package size. This research paper presents evaluation and characterization of transmission time, minimum amount of operating voltage and current, and hence the power required to transmit certain size packets of data of an off-shelf RF ASK 315 MHz wireless module. A microcontroller with the VirtualWire library was used to provide data to the transmitter module and transmit it to the receiver, located 2 m apart, with transmitting rate of 2 kbit/s. The experimental outcome showed that the tested module would need 50 ms with 0.3 mW in order to transmit a byte of data. The transmission time increased proportionally with the data package size. Meanwhile, the transmission power increased in logarithmic manner with the data package size

Reaction of N,N '-disubstituted hydrazinecarbothioamides with 2-bromo-2-substituted acetophenones

Reaction of hydrazinecarbothioamides with 2-bromoacetophenones furnished the formation of thiazole-, bis-thiazole-, pyrazole- and 1,3,4-thiadiazole- derivatives in good yields. The mechanism was discussed. The structures of products were proved by MS, IR, NMR, elemental analyses and X-ray structure analyses. [GRAPHICS] .Peer reviewe