Tingkat Produktivitas Ternak Usaha Sapi Potong Program Kredit Ternak Sejahtera (KTS) di Kabupaten Berau Kalimantan Timur

This study aims to determine the livestock productivity level of beef cattle business at Prosperous Livestock Credit (PLC) program in Berau regency, East Kaliamntan. This study implemented in Berau regency in three districts namely Teluk Bayur, Sambaliung and Gunung Tabur, with used survey method at PLC program in Berau regency. Data analysis used descriptive analysis by means and standard deviation. The results showed an increase of the beef cattle population in the PLC program by 48.67 %/year from the initial number of beef cattle. Productivity indicated with Pubertas 2.26±0.40 years, S/C 1.35±0.61, Pregnancy Rate 283.53±1.33 days, Age at First Calving 3.04±0.40 years, Calving Rate 81 % with female population, Fertility 65 %, Mortality 8 % with total population, Oestrus Pospartum 40-60 days, Calving interval 12.4±0.44 months. The average of beef cattle business in the PLC program was 10.23 AU/farmer.

Virtual commissioning of automated manufacturing systems — Quality-handling station case study

The aim of the contribution is to create an event-controlled simulation of an automated production system using selected simulation software according to analyses and creation PLC control program compatible with human-machine control interface (HMI) visualization. The programmer can test the control program without the need for additional hardware on a virtual model of the machine. This method is called as a Virtual Commissioning method. The question is whether these new digital technologies are beneficial in the development process of new machines. The theoretical part of the contribution deals with the evaluation of the current state of knowledge in the field of virtual commissioning systems from the perspective of the Industry 4.0 concept and the use of principles taken from the technology of digital twins for analysing the possibilities of productive support of simulation, programming and visualization of control. For the Virtual Commissioning of the Quality-handling station from a flexible production system. It was chosen Tecnomatix Process simulating software for the developing of the Digital Twin of the station that is suitable for the connection of the logical behaviour inputs and outputs of the Digital Twin to the PLCSIM emulator. The main goal is to create a functional PLC program, so that in the second phase the process of virtual commissioning can be tested by the Software-the-Loop method. The preparation of the simulation model consists in a sample of the control station model of the production system, the process of creating kinematic bonds, behaviour model, creating control signals in the Tecnomatix Process Simulate program. Programming procedure and acquaintance with control means in the Simatic Manager program, selection of communication interface and creation of control visualization. In the final work, validation is performed and evaluation supports the objectives and the results confirmed the benefits of the Virtual Commissioning tool.

Simulator Berbasis PLC untuk Pengaturan Lalu-lintas Jalan Raya pada Perlintasan Jalur Kapal

A PLC based simulator has been assembled for controlling road traffic at ship line crossings. The objectives of this study include (i) assembling a miniature bridge body, a lift-drop back mechanism for highway traffic at ship crossings, and an operating system based on a programmable logic controller (PLC) and (ii) measuring the performance of the operating system through its presence input-output signal. Assembly with the following stages: (i) implementation of miniature bridge construction; (ii) selection and placement of sensors; (iii) installation of pumps for hydraulic systems; (iv) installation of servo motor assisted latches; (v) installation of traffic control lights and indicators; and (vi) manufacture of operation panels, wiring, and installation of PLC systems. Mitsubishi PLC system programming is based on compiling algorithms and ladder diagrams with GX Works-2 32 bit. Performance measurement includes (i) when synchronization between the operating system and control on the PLC in the form of input from the operation panel and sensors on the input line are processed in the PLC program to produce an output in the form of appropriate and precise control, (ii) when the sensors installed in the system operation has functioned as programmed into the PLC, and (iii) during the process of lifting and lowering the miniature of the bridge body, there is a time difference of 26 seconds with the condition that the lifting time is longer than the time of lowering the miniature bridge body. The general conclusion is that the miniature of the bridge body and the operating system that has been built can be used as a simulator for the existence of a bridge that can be lifted and lowered again as a highway traffic lane at a ship crossing.

A User-Friendly Verification Approach for IEC 61131-3 PLC Programs

Programmable logic controllers (PLCs) are special embedded computers that are widely used in industrial control systems. To ensure the safety of industrial control systems, it is necessary to verify the correctness of PLCs. Formal verification is considered to be an effective method to verify whether a PLC program conforms to its specifications, but the expertise requirements and the complexity make it hard to be mastered and widely applied. In this paper, we present a specification-mining-based verification approach for IEC 61131-3 PLC programs. It only requires users to review specifications mined from the program behaviors instead of model checking for specified specifications, which can greatly improve the efficiency of safety verification and is much easier for control system engineers to use. Moreover, we implement a proof-of-concept tool named PLCInspector that supports directly mining LTL specifications and data invariants from PLC programs. Two examples and one real-life case study are presented to illustrate its practicability and efficiency. In addition, a comparison with the existing verification approaches for PLC programs is discussed.

Survey of the Implementation of Professional Learning Community (PLC) Program in Primary Schools

This research aims at illustrating the implementation of Professional Learning Community (PLC) programs, which later will be used to be the basic data for the preparation of PLC program design that is applicable and easily implemented by the teachers. The low contribution and discontinuity of teachers in the PLC programs in primary schools have impacted on the lack of optimization of the PLC programs as a support for sustained improvement of teacher professionalism. This research employed a descriptive research design with a survey approach involving 52 primary school teachers in Sumerdang Regency. The research results revealed that even though the teachers’ understanding of the PLC program objectives was very high, the teachers’ understanding of the PLC program mechanism was still low. Thus, this resulted in the low level of the implementation of the PLC program in primary schools, both in programs and regulations. Therefore, further research is expected to produce the operational, structured, and applicable PLC programs in order to increase the teachers’ participation in implementing the PLC programs for improving teacher professionalism, and having a real impact on the improvement of the quality of learning in primary schools.

ANALISIS PENGARUH PENGEMBANGAN EKSTRAKULIKULER PRAMUKA TERHADAP KEDISIPLINAN SISWA DI SMP JAYA BAKTI JAKARTA

Efforts to develop national character through various learning activities and living habits, like religious, honest, disciplined, tolerant, hard work, peaceful and peaceful, and responsible, are undertaken in schools. The common practice is to teach the proper and wrong knowledge and feel if the value is good or not. This study is a quantitative description of qualitative research. This research kind is a correspondence. All the kids who participated in Jaya Bakti Junior High School Jakarta's Scouting Extrascientific activities comprised 24 pupils. Total sampling methods were used to collect a sample of 24 students. The research sample the methodology for collecting data is a survey. Pearson's product-moment correlation with the help of the PLC program was employed in data analysis methodology. The association between SMP Jaya Bakti Jakarta Scouting and Student Discipline with a significance (0.000 < 0.05) is positive and significant, this study demonstrates. Student discipline must be taken into account, as discipline is an initial key for the formation of students. Scouting discipline has a major influence on kids' molding.