Tools Rekayasa Perangkat Lunak dalam Membuat Pemodelan Desain Menggunakan Unified Modeling Language (UML)

Pengembangan Rekayasa Perangkat Lunak berorientasi Objek, saat ini menggunakan tools pemodelan desain yang sesuai dengan model perancangan aplikasi sistem berorientasi objek. Dalam membangun suatu aplikasi sistem berorientasi objek atau berorientasi langsung dengan para pengguna (Users), maka tools yang tepat untuk di gunakan sebagai tools perancangan aplikasi sistem berorientasi objek yang dapat menggambarkan model proses (blueprint) dari suatu Rekayasa Perangkat Lunak Berorientasi Objek ialah Unified Modeling Language (UML). Unified Modelling Language (UML) adalah suatu metode dalam pemodelan secara visual yang digunakan sebagai sarana perancangan sistem berorientasi objek. Awal mulanya, UML diciptakan oleh Object Management Group dengan versi awal 1.0 pada bulan Januari 1997 [13]. Pada September 1997 lahirlah Unified Modeling Language (UML) versi 1.1 dengan 8 buah diagram, Pada tahun 1999 lahirlah Unified Modeling Language (UML) versi 1.3, menjadi 9 buah diagram, dengan penambahan “Business use case Diagram”, Pada bulan Mei 2001 lahirlah Unified Modeling Language (UML) versi 1.4, menjadi 10 buah diagram, dengan penambahan “Object Diagram”, Pada tahun 2002 lahirlah Unified Modeling Language (UML) versi 2.0, menjadi 13 buah diagram, dengan penambahan menjadi 13 buah diagram [1]-[3]. Model diagram proses yang dapat di kembangkan atau dibangun menggunakan Unified Modeling Language (UML) ialah Use Case Diagram, Business Use Case Diagram, Activity Diagram, Sequence Diagram, Object Diagram, Class Diagram, StateChart Diagram, Collaboration Diagram, Component Diagram, Deployment Diagram, Composite Structure Diagram, Interaction Overview Diagram, Package Diagram, Timing Diagram. Unified Modeling Language (UML) diharapkan mampu mempermudah pengembangan perangkat lunak serta memenuhi semua kebutuhan pengguna dengan efektif, lengkap, dan tepat. Hal itu termasuk faktor-faktor scalability, robustness, security. Adapun tujuan dan fungsi perlu adanya Unified Modeling Language (UML) yakni (1) Dapat memberikan bahasa pemodelan visual atau gambar kepada para pengguna dari berbagai macam pemrograman maupun proses umum rekayasa, (2) Menyatukan informasi-informasi terbaik yang ada dalam pemodelan, (3) Memberikan suatu gambaran model atau sebagai bahasa pemodelan visual yang ekspresif dalam pengembangan sistem, (4) Tidak hanya menggambarkan model sistem software saja, namun dapat memodelkan sistem berorientasi objek, (5) Mempermudah pengguna untuk membaca suatu sistem. Dan Unified Modeling Language (UML) berguna sebagai blueprint dalam perancangan berupa coding suatu program. Software yang dapat menggambarkan Unified Modeling Language (UML) ialah Aplikasi StarUML. Aplikasi StarUML dapat digunakan untuk membuat suatu alur atau proses dari suatu prosedur program yang ingin dibuat dengan cara menggambarkan model perangkatnya. Didalam StarUML terdapat beberapa bagian utama dari Unified Modeling Language (UML) yaitu view, diagram, model element, dan general mechanism.

Design of Online Quiz System for Practice & Assessment During Covid-19

Kapeel Dev et al., International Journal of Advanced Trends in Computer Science and Engineering, 10(4), July – August 2021, 2816 – 2820 2816  ABSTRACT After the new Coronavirus illness (COVID-19) case spread quickly in Wuhan-China in December 2019, World Health Organization (WHO) affirmed that this is a hazardous infection which can be spreading from one people to another through drops and airborne.. This pandemic has forced Educational institutions (schools, colleges, and universities) in whole world dramatically to odapt to e-learning. In right now, colleges, instruction controllers and educators are associated with much conversation how to best get ready test framework for assesemtn so understudies can accomplish their scholastic exhibition and can rehearse for MCQ based tests. The utilization of online apparatuses to show courses in different orders has acquired prominence during this pandemic. In This paper we will develop an Online Quiz system for free self practice so students can judge their own performance before sit in professional online exam.they will get idea from that self practice Online Quiz system or online quiz board development is a training package designed to test students ' comprehension oftranslating the timing diagram into an analogous ladder diagram.[3].

Management switching angles real-time prediction by artificial neural network

Artificial neural networks (ANNs) is an efficient way for different types of real-world prediction problems. In the past decade, it has given a tremendous surge in a global research activities. ANNs embody much certainty and provide a great deal of promise This paper has present artificial neural network (ANN) technique analysis and prediction for management switching angles real-time. The proposes to be used ANN for prediction and selected obtine angles for implement the timing diagram for mulitlvel inverter circuit. In order to control the fundamental component, ANNs are used to solve the analysis of non-linear equation of the output timing diagram in order to determine the switching angles. Substantially, the number of switching devices are reducing as possible basically for reducing a switching loss in the system, also have been used ANNs technique to optimize a switching angles behavior to reduce total harmonic distortion (THD) at voltage and current output waveform equal THDV 8.05% THDA 5.1%. For the proposed controllers, the performance and results by the ANNs were obtained and compared by using MATLAB software.

PENGARUH LSA (LOBE SEPARATION ANGEL) PADA CAMSHAFT TERHADAP UNJUK KERJA MESIN JUPITER Z1

Penelitian ini bertujuan untuk mengetahui performa mesin terbaik dari perubahan angel separasi lobe pada camshaft, dan mengetahui diagram timing katup dari setiap modifikasi camshaft. Penelitian dilakukan dengan mengubah profil poros bubungan untuk menghasilkan waktu katup dan sudut preparasi lobus yang berbeda, kemudian dilakukan pengujian menggunakan dynotest untuk mendapatkan performa mesin Jupiter z1. Hasil penelitian menggunakan dynotest untuk mengetahui performa mesin, dari hasil pengujian mendapatkan hasil tertinggi dari setiap profil camshaft yaitu pada tenaga LSA 103.25o (standar) sebesar 9.035 Hp dan torsi 8.093 Nm, pada tenaga LSA 105.5o Dengan tenaga 9.162 Hp dan torsi 9.062 Nm, LSA 102.5o bertenaga 9.036 Hp dan torsinya 8.949 Nm. Pengaruh LSA pada camshaft standar dan modifikasinya yaitu pada camshaft dengan LSA 105.5o tenaga bertambah 1,3% dan torsi bertambah 10.7% sedangkan tenaga LSA 102.5o bertambah 0.01% dan torsi bertambah 9,5 %. Sehingga performa terbaik didapatkan pada camshaft dengan LSA 105.5o.This study aims to determine the best engine performance from changes in the angel separation lobe on the camshaft, and to find out the valve timing diagram of each camshaft modification. The research was carried out by changing the camshaft profile to produce different valve timing and lobes preparation angles, then do a test using dynotest to get Jupiter z1 engine performance. The results of the study used dynotest to determine engine performance, from the results of testing to get the highest results from each camshaft profile, namely the LSA 103.25o (standard) power of 9.035 Hp and torque of 8.093 Nm, on LSA 105.5o power is 9,162 Hp and torque is 9,062 Nm, the LSA 102.5o power is 9.036 Hp and torque is 8.949 Nm. The effect of LSA on the standard camshaft and modification, namely on the camshaft with LSA 105.5o, the power increased by 1.3% and torque increased by 10.7% while the LSA 102.5o the power increased by 0.01% and torque increased by 9,5%. So that the best performance is obtained on the camshaft with LSA 105.5o.

DEVICE FOR GEOPHYSICAL EXPLORATION OF THE EARTH'S CRUST BASED ON A DETONATION GENERATOR

The article describes the principle of operation of the device for geophysical exploration, which is based on the action of detonation waves to a limited area of the earth's surface at a shallow depth (up to 100 m), a block diagram and timing diagrams explaining the principle of the device. KEYWORDS: geophysical exploration, device, block diagram, principle of operation, timing diagram, detonation generator, phase shift, harmonic component of echo signals.

TESS photometry of the eclipsing δ Scuti star AI Hydrae

AI Hya has been known as an eclipsing binary with a monoperiodic $\delta$ Sct pulsator. We present the results from its TESS (Transiting Exoplanet Survey Satellite) photometry observed during Sector 7. Including our five minimum epochs, the eclipse timing diagram displays the apsidal motion with a rate of $\dot{\omega } = 0.075 \pm 0.031\:$deg$\:$yr$^{-1}$, which corresponds to an apsidal period of $U = 4800\pm 2000\:$yr. The binary star model represents that the smaller, less massive primary component is $427\:$K hotter than the pulsating secondary, and our distance of $612\pm 36\:$pc is in good agreement with the Gaia distance of $644\pm 26\:$pc. We subtracted the binary effects from the observed TESS data and applied a multifrequency analysis to these residuals. The result reveals that AI Hya is multiperiodic in its pulsation. Of 14 signals detected, four ($f_1$, $f_2$, $f_3$, $f_6$) may be considered independent pulsation frequencies. The period ratios of $P_{\rm pul}/P_{\rm orb} = 0.012$–0.021 and the pulsation constants of $Q = 0.30$–0.52 d correspond to $\delta$ Sct pulsations in binaries. We found that the secondary component of AI Hya pulsates in both radial fundamental $F$ modes ($f_2$ and $f_3$) and non-radial $g_1$ modes with a low degree of $\ell = 2$ ($f_1$ and $f_6$).

Meteor communication network in the monitoring system for technical means of navigation safety of the northern sea route

Изложены возможности и особенности использования в Арктической зоне России сети метеорной связи, которую целесообразно применить в целях обеспечения безопасности функционирования объектов транспортной инфраструктуры Северного морского пути, что способствует повышению экономической эффективности в целом всего морского транспортно-технологического процесса, а также для обеспечения безопасности судоходства в указанном регионе с учетом специфики распространения УКВ-радиосигналов и больших расстояний между объектами. Представлена временная диаграмма, характеризующая процесс функционирования радиолинии метеорной связи, соответственно, для оценки прерывистости связи предлагается использовать специальный параметр под названием коэффициент использования радиолинии. Показано, что для обеспечения энергетического контакта необходимой длительности между удаленными ведущими и ведомыми станциями метеорной связи в качестве пассивного ретранслятора может насыщенный метеорный след, способный обеспечить требуемую устойчивую связь, удовлетворяющей заданным требованиям по защите информации и по вероятности ошибочного приема ложных знаков с сохранением целостности сообщений при условии прерывистости энергетических контактов между корреспондентами. This paper describes the possibilities and features of using the meteor communication network in the Arctic zone of Russia. It is advisable to use this meteor communication network in order to ensure the safety of the transport infrastructure of the Northern sea route. This contributes to the overall economic efficiency of the entire Maritime transport and technological process. Also, it is appropriate to ensure the safety of navigation in the region, taking into account the specifics of the propagation of VHF radio signals and long distances between the objects. A timing diagram characterizing the operation of the meteor radio link is presented, so it is proposed to use a special parameter called the radio link utilization factor to estimate communication discontinuity. It has been shown that a saturated meteor trail can be used as a passive repeater to provide energy contact of the desired duration between the remote leading and trailing meteor communication stations. This is capable to provide the required stable communication that meets the specified data protection requirements. And it is also urgent for the probability of erroneous false signs reception with preservation of messages integrity under condition of energy contacts discontinuity between correspondents.

E-Logic Trainer Kit : Development of an Electronic Educational Simulator and Quiz Kit for Logic Gate Combinational Circuit by using Arduino as Application

To supplement conventional teaching methods, use of new technology have recently being adapted in the current education system. Such examples are implementing simulators and quiz kits in a classroom session to assist teachers in providing standardized evaluation or practical and more direct examples of concepts that are being taught. Additionally, the well-known issue of attracting student interest in a so-called uninteresting conventional lecture may be solved by using this technological method. The objective of this works to provide methods on developing a prototype training kit (named as e-Logic trainer kit or e-LTK) which comprises of an electronic simulator and quiz assessment module to evaluate subject knowledge on logic gates. The e-LTK is developed by using Arduino Mega 2560 as the base microcontroller, equipped with keypad and display module as the user input/output interface. The quiz assessment module contained in the prototype also allows conversion of inputs by combinatorial logic circuits into output in the form of timing diagram. This equipment enables electrical engineering students to simulate several combinations of logic circuit, reinforcing the understanding of logic circuit operation. The effectiveness of using this prototype in educational settings have been evaluated through a survey on students and instructors at Faculty of Technology in Engineering (FTK) in Universiti Teknikal Malaysia Melaka (UTeM). Response has been positive, with 60% of the correspondence has shown positive feedbacks, indicating the usefulness of the prototype kit.