Characterization of soft soil using multi-channel analysis of surface waves (MASW) and electrical resistivity method (ERM)

This thesis demonstrates the research on the soft soil characteristics using geophysical methods. The need on non-intrusive, time efficient, economic and larger volume of investigation had increased the demand of using geophysical methods for geotechnical investigation. The research concentrates on the determination of soft soil shear-wave velocity (Vs) profile using the multi-channel analysis of surface waves (MASW) and the soil stratigraphy using Electrical Resistivity Method (ERM). The soft soil Vs and stratigraphy were determined and correlated with the peat sampler and borehole data to obtain more accurate data. The research was conducted at Parit Nipah and RECESS UTHM. The Vs obtained for peat and soft clay at Parit Nipah was in the range of 29.7 to 34.9 m/s and 36.8 to 76.9 m/s respectively. While, the soft clay Vs obtained at RECESS was in the range of 64.4 to 124.0 m/s. The lower Vs obtained on peat compared to soft clay was due to the heterogeneity of peat. The soil strata obtained by ERM had good agreement with the peat sampler and borehole data. The resistivity value of peat and soft clay obtained at Parit Nipah was in the range of 47.2 to 127.7 ohm.m and 9.4 to 25.8 ohm.m correspondingly. While, at RECESS soft clay, the resistivity value was in the range of 1.0 to 4.6 ohm.m. The lower resistivity value of soft clay was governed by the amount of clay fraction which was related to cation exchange capacity (CEC). As higher CEC results in higher conductivity. The relationship obtained between the 1-D Vs and 1-D resistivity value shows that consistent value of peat Vs was followed by the slight decrease in peat resistivity value. While, drastic increase in soft clay Vs results in a significant decrease in soft clay resistivity value. This concluded that stiffness does not produce significant effect on the soil resistivity. Overall, MASW and ERM produced high quality data for subsurface investigation in larger volume with timely efficient manner and more economic

MESIN PENGECAP MOTIF BATIK BERBASIS ATMEGA 8535

Tujuan pembuatan proyek akhir yang berjudul “Mesin Pengecap Motif Batik Berbasis Atmega8535” adalah untuk memudahkan proses pengecapan batik motif agar tidak manual dan proses pengecapannya berjalan secara otomatis tidak dilakukan oleh operator (manusia), alat ini dikontrol oleh sebuah mikrokontroler. Metode yang digunakan dalam proyek akhir ini adalah rancang bagian kontrol pengecap Mesin Pengecap Motif Batik Berbasis Atmega8535. Perancangan perangkat keras terdiri dari: catu daya, perangkat kontrol dan pengolah data yang berupa sistem minimum mikrokontroller Atmega8535, LCD monitor, push button, motor dc, solenoid, sensor photo dioda dan saklar relay. Sensor phototransistor digunakan untuk mendeteksi objek benda. Motor DC digunakan untuk penggerak conveyor dan menggeser solenoid pengecap dari kanan kekiri maupun kiri kekanan. Solenoid digunakan untuk pengecap motif batik dari tinta malam kekain putih (mori). Berdasarkan Hasil pengujian dan unjuk kerja dari Mesin Pengecap Motif Batik Berbasis Atmega8535 telah menunjukkan hasil kerja dengan sistem cara kerja sensor dan waktu (delay) untuk menunjukkan hasil kerja dari alat Mesin Pengecap Motif Batik Berbasis Atmega8535 langkah awalnya sensor phototransistor 1 bekerja jika objek benda kain ditaruh atas conveyor. Conveyor bergerak kearah sensor phototransistor 2 sensor tersebut bekerja menjalankan perintah untuk menggerakkan pengecap (solenoid) dari pengambilan malam ke kain putih yang dibawa oleh conveyor untuk pergeseran pengecapan digerakkan oleh motor DC dengan menggunakan rel penggeser dari bekas printer untuk menggeser dari kanan kiri. Sistem pergeseran rel pengecap ini bekerja dengan sistem waktu delay yang telah ditentuka

Pendekatan Kriptografi Hybrid pada Keamanan Dokumen Elektronik dan HypertextTransfer Protocol Secure (HTTPS) (Analisis Potensi Implementasi pada Sistem Keamanan)

Security issue always to be challenge for the development of information technology. As the security aspects of information systems, both of electronic and document data in hypertext data communications, must be able to meet safety standards. The implementation of security systems calssified as two methods, Symmetric and Asymmetric. Implementation of these methods certainly have their advantages and disadvantages of each, so it is necessary to apply a method to merge some types of the methods. This project was analyzed using a hybrid approach of cryptographic methods that are implemented on the security of electronic documents and Hypertext Transfer Protocol Secure (HTTPS). In the implementation of electronic document used of biometric signatures and DSA (Digital Signature Algorithm) and implementation on HTTPS used a combination of asymmetric cryptography and symmetric cryptography. The analysis of this research translated into the implementation of hybrid method on electronic documents and Hypertext Transfer Protocol Secure. From the analysis shows that the hybrid method is able to combine the advantages of symmetric and asymmetric methods, although of course the constraints in implementation complexity of the system will be even greater

Planetesimals to brown dwarfs: What is a planet?

The past 15 years have brought about a revolution in our understanding of our Solar System and other planetary systems. During this time, discoveries include the first Kuiper belt objects (KBOs), the first brown dwarfs, and the first extrasolar planets. Although discoveries continue apace, they have called into question our previous perspectives on planets, both here and elsewhere. The result has been a debate about the meaning of the word "planet" itself. It is clear that scientists do not have a widely accepted or clear definition of what a planet is, and both scientists and the public are confused (and sometimes annoyed) by its use in various contexts. Because "planet" is a very widely used term, it seems worth the attempt to resolve this problem. In this essay, we try to cover all the issues that have come to the fore and bring clarity (if not resolution) to the debate

Penataan Dan Pengelolaan Wilayah Kelautan Perspektif Otonomi Daerah Dan Pembangunan Berkelanjutan

Penataan wilayah kelautan diperlukan dalam kaitannya pengaturan pemanfaatan laut secara optimal dengan mengakomodasi semua kepentingan sekaligus sebagai upaya menghindari adanya konflik pemanfaatan ruang di laut dan pemanfaatan sumber daya kelautan sehingga harus diberikan batas yang jelas antara zona pemanfaatan yang satu dengan zona yang lain, sehingga wilayah laut dapat memberikan manfaat bagi segenap masyarakat di Indonesia khususnya masyarakat pesisir. Tujuan dari penulisan ini adalah untuk mengkaji tentang penataan dan pengelolaan wilayah dan sumber daya kelautan secara terpadu dalam Hukum Agraria Perspektif Otonomi Daerah, serta untuk menganalisis penataan dan pengelolaan sumber daya kelautan secara berkelanjutan dalam Hukum Agraria Perspektif Otonomi Daerah. Pengelolaan kawasan pesisir dan lautan hendaknya dilakukan secara terpadu, meliputi kawasan daratan dan kawasan lautan, mencakup berbagai sektor dan subsektor yang berbeda, pembangunan berkelanjutan adalah pembangunan yang diorientasikan untuk memenuhi kebutuhan generasi sekarang tanpa mengorbankan kemampuan generasi yang akan datang.Structuring the sea area required in relation to setting the optimal utilization of the sea to accommodate all interests as well as efforts to avoid any conflict in the sea of space utilization and utilization of marine resources and should be given a clear boundary between the zones use zone one with another, so that the sea area can provide benefits for all the people in Indonesia, especially coastal communities. Integrated coastal zone management and sustainability into account. The purpose of this paper is to study about the structuring and management of marine areas and resources in an integrated manner in Agrarian Perspective of Regional Autonomy Law, as well as to analyze the structuring and management of marine resources in a sustainable manner in the Regional Autonomy Law of Agrarian Perspective. Coastal and ocean management should be done in an integrated manner, covering lands and seas region, spanning multiple sectors and sub-sectors are different, sustainable development is development oriented to meet the needs of the present without compromising the ability of future generations

Profiles of Strong Permitted Lines in Classical T Tauri Stars

We present a spectral analysis of 30 T Tauri stars observed with the Hamilton echelle spectrograph over more than a decade. One goal is to test magnetospheric accretion model predictions. Observational evidence previously published supporting the model, such as emission line asymmetry and a high frequency of redshifted absorption components, are considered. We also discuss the relation between different line forming regions and search for good accretion rate indicators. In this work we confirm several important points of the models, such as the correlation between accretion and outflow, broad emission components that are mostly central or slightly blueshifted and only the occasional presence of redshifted absorption. We also show, however, that the broad emission components supposedly formed in the magnetospheric accretion flow only partially support the models. Unlike the predictions, they are sometimes redshifted, and are mostly found to be symmetric. The published theoretical profiles do not have a strong resemblance to our observed ones. We emphasize the need for accretion models to include a strong turbulent component before their profiles will match the observations. The effects of rotation, and the outflow components, will also be needed to complete the picture.Comment: 25 pages including 9 figures, 3 tables, accepted for publication in the Astronomical Journa

Signifikansi Desain Pembelajaran Dalam Menunjang Kesuksesan Mengajar

Instructional design is a design study conducted in order to transfer knowledgeeffectively its occur between teacher and student. Instructional design should describe theknowledge to be understood by the students, the learning objectives to be achieved bydesigning methods, strategies, and instructional media. Learning goals focused onstudent behavior or actions (performace) as a type of output that can be observed andindicate that the student had engaged in learning. The learning process can be managed,if the teacher has a view that is consistent with his philosophy, that the success of theteacher in teaching can be seen from the extent of the teacher in implementing lessonplans apply, so the indicators set out in the lesson plan is well absorbed by the studentsand can be measured through formative tests conducted teacher at the end of the lesson