Stamina of a non-gasketed flange joint under combined internal pressure, axial and bending loading : an experimental study

The performance of a bolted flange joint is characterized mainly by its 'strength' and 'sealing capability'. A number of numerical and experimental studies have been conducted to study these characteristics under internal pressure loading conditions alone. However, limited work is found in the literature under conditions of combined internal pressure and axial loading. The effect of external, axial loading pressure being unknown, the optimal performance of the bolted flange joint cannot be achieved. Current design codes do not address the effects of axial loading on structural integrity and sealing ability. To study joint strength and sealing capability under combined loading conditions, an extensive experimental and numerical study of a non¬gasketed flange joint was carried out. Actual joint load capacity was determined at both design and test stages with the maximum external axial loading that can be applied for safe joint performance. Experimental and numerical results have been compared and overall joint performance and behaviour is discussed in detail

Pengaruh Prestasi Belajar, Pengembangan Karir dan Aktualisasi Diri Terhadap Minat Melanjutkan Pendidikan ke Perguruan Tinggi Siswa SMK di Kota Yogyakarta

Penelitian ini bertujuan untuk mengetahui pengaruh prestasi belajar, pengembangan karir, dan aktualisasi diri terhadap minat siswa SMK di kota Yogyakarta untuk melanjutkan pendidikan ke Perguruan Tinggi baik secara parsial maupun secara simultan. Penelitian ini termasuk jenis penelitian expost facto, dan merupakan penelitian asosiatif bila dilihat dari tingkat kejelasannya (level of explanation). Data yang diperoleh berupa data interval dan rasio, sehingga teknik statistik yang digunakan adalah teknik statistik inferensial parametris. Penelitian ini menggunakan dua macam variabel, 1) Variabel Bebas, yaitu: Prestasi Belajar (X1), Pengembangan Karir (X2), Aktualisasi Diri (X3); 2) Minat Melanjutkan Pendidikan ke Perguruan Tinggi Siswa SMK di kota Yogyakarta (Y) sebagai variabel terikatnya. Teknik pengambilan datanya menggunakan kuesioner untuk mengumpulkan data dari variabel X2, X3, dan Y. sedangkan untuk variabel X1 pengumpulan datanya menggunakan teknik dokumentasi data prestasi belajar siswa (responden). Sampel dalam penelitian ini adalah siswa kelas 3 di SMKN2 Yogyakarta, SMKN3 Yogyakarta, SMK Muhammadiyah 3 Yogyakarta dan SMK PIRI 1 Yogyakarta yang seluruhnya berjumlah 97 responden. Teknik analisis data yang digunakan adalah teknik analisis korelasi product moment dan analisis regresi ganda dengan tiga prediktor. Pengujian hipotesis dengan tingkat signifikansi (α) sebesar 0,05, dengan dk = 95 dan uji dilakukan dengan satu sisi, menunjukan bahwa ; 1) Terdapat pengaruh yang signifikan antara prestasi belajar terhadap minat melanjutkan pendidikan ke perguruan tinggi, dengan kontribusi sebesar 23,43% dan sisanya 76,57% ditentukan oleh variabel lain ; 2) Terdapat pengaruh yang signifikan antara pengembangan karir terhadap minat melanjutkan pendidikan ke perguruan tinggi, dengan kontribusi sebesar 15,92% dan sisanya 84,08% ditentukan oleh variabel lain ; 3) Terdapat pengaruh yang signifikan antara aktualisasi diri terhadap minat melanjutkan pendidikan ke perguruan tinggi, dengan kontribusi 30,8% dan sisanya 69,12% ditentukan oleh variabel lain ; 4) F hitung lebih besar dari pada F tabel atau 17,990 > 2,707 yeng berarti terdapat pengaruh yang signifikan antara variabel prestasi belajar, pengembangan karir dan aktualisasi diri secara simultan terhadap minat melanjutkan pendidikan ke Perguruan Tinggi siswa SMK di kota Yogyakarta, dengan kontribusi sebesar 36,7% sedangkan sisanya atau sebasar 63,3% dipengaruhi oleh Variabel lain

Accelerated micropolar fluid--flow past an uniformly rotating circular cylinder

In this paper, we formulated the non-steady flow due to the uniformly accelerated and rotating circular cylinder from rest in a stationary, viscous, incompressible and micropolar fluid. This flow problem is examined numerically by adopting a special scheme comprising the Adams-Bashforth Temporal Fourier Series method and the Runge-Kutta Temporal Special Finite-Difference method. This numerical scheme transforms the governing equation for micropolar fluids for this problem into system of finite-difference equations. This system was further solved numerically by point SOR-method. These results were also further extrapolated by the Richardson extrapolation method. This scheme is valid for all values of the flow and fluid-parameters and for all time. Moreover the boundary conditions of the vorticity and the spin at points far from the cylinder are being imposed and encountered too. The results are compared with existing results (for non-rotating circular cylinder in Newtonian fluids). The comparison is good. The enhancement of lift and reduction in drag was observed if the micropolarity effects are intensified. Same is happened if the rotation of a cylinder increases. Furthermore, the vortex-pair in the wake is delayed to successively higher times as rotation parameter increases. In addition, the rotation helps not only in dissolving vortices adjacent to the cylinder and adverse pressure region but also in dissolving the boundary layer separation. Furthermore, the rotation reduces the micropolar spin boundary layer also

The stamina of non-gasketed, flanged pipe connections

Stress variations showing flange yielding, flange rotation, effects of joint tightening sequence, identification of the mode of response to loading (static or dynamic) is discussed. In addition the effects of re-tightening, importance of high quality bolting with proper surface treatment and use of proper tooling are also discussed

Tachometer Based Mikrokontroller Atmega16 With Electromagnetic Induction Method On Spark Plug Wires As Ancillary Equipment Service Light On Motorcycle

The final project was created with the aim of building the hardware, software, and know the performance of the Tachometer Based Mikrokontroller Atmega16 By Electromagnetic induction Method In spark plug Wires As Ancillary Service Light Fixtures on the motorcycle as a tool that can measure the rotation of the engine shaft perminuits. Methods used in constructing mikrokontroller based atmega16 Tachometer with electromagnetic induction method in spark plug wires as ancillary service light fixtures on the motorcycle is made up of: 1) the identification of needs, (2) analysis of needs, (3) Design Method, (4) and (5) Test. This tool works is controlled by a system of mikrokontroller ATmega16 and programmed using software CodeVision AVR based language c. supporting Hardware consists of a power supply circuit based on Regulator 78xx ICS, using seven segment display 2.3 inches, BC547 transistor-IC ULN2803 BC557 as well as a series of drivers, FCS9013 transistor that is used to capture induction and processor as ATmega16 mikrocontroller. After testing, be aware that Hardware can be run well by using the minimum system mikrokotroller ATmega16 combined with other support instruments. While the software is created using software CodeVision AVR also runs very well. However performance Tachometer Based Mikrokontroller Atmega16 By Electromagnetic induction Method In spark plug Wires As Ancillary Equipment Service Light On Motorcycles in general are still not running at maximum because fault reading on high RPM still with an average error of reach 8.24%. Keywords: Tachometer, electromagnetic induction, spark plug Wires, ATMega1

READING INSTINCTS AND SYMBOLS IN CORMAC McCARTHY’S THE ROAD

Skripsi berikut akan mencoba membahas novel berjudul The Road menggunakan psikoanalisis dan simbolisme. Penulis akan membahas bagaimana karakter – karakter dalam novel menggunakan insting mereka untuk bertahan hidup ataupun untuk mendapat apa yang mereka inginkan atau butuhkan. Penulis juga mencoba melihat obyek dan cerita dalam novel sebagai simbol dan mencoba mencari makna dibalik simbol – simbol tersebut. Penulis menggunakan studi pustaka dalam mengumpulkan data – data yang dibutuhkan dalam penulisan tesis ini. Penulis mengumpulkan data dari sumber – sumber tertulis maupun elektronik untuk mendukung teori yang digunakan untuk membahas The Road. Dan teori yang cocok calam hal ini adalah psikoanalisis dan simbolisme. Melalui pembahasan dalam skripsi ini penulis mengetahui bahwa karakter – karakter dalam novel ini bertindak mengikuti dorongan dari pikiran mereka masing – masing. Mereka bertindak berbeda satu sama lain karena pikiran manusia juga saling berbeda satu sama lain. Tetapi pada dasarnya insting dari karakter – karakter dalam novel hampir selalu menuntut kesenangan. The Road adalah sebuah novel dengan gaya penulisan dan jalan cerita yang unik sehingga sangat terbuka untuk dipelajari dengan menggunakan psiko-analisis termasuk simbolisme

The collocation and meshless methods for differential equations in R(2)

In recent years, meshless methods have become popular ones to solve differential equations. In this thesis, we aim at solving differential equations by using Radial Basis Functions, collocation methods and fundamental solutions (MFS). These methods are meshless, easy to understand, and even easier to implement

Food crises in developing countries: the role of national governance

This repository item contains a single issue of Issues in Brief, a series of policy briefs that began publishing in 2008 by the Boston University Frederick S. Pardee Center for the Study of the Longer-Range Future. This paper is part of The Project on Food and Development, a Pardee Center program of research, publications and symposia exploring the relationship between global food policy and development in its various dimensions. The project is generously supported by the Ministry of Agriculture, Nature and Food Quality of the Netherlands. The views expressed in this paper are strictly those of the author and should not be assumed to represent the views of Boston University or the Ministry of Agriculture, Nature and Food Quality of the Netherlands.This paper looks at the recent price increases in food commodities and using Pakistan as a case study it concludes the national governance is a key component in understanding what happened and why. This paper is part of The Project on Food and Development, a Pardee Center program of research, publications and symposia exploring the relationship between global food policy and development in its various dimensions