scholarly journals Modelling and Optimization of Organization of Workplaces in a Foundry

2016 ◽  
Vol 16 (3) ◽  
pp. 55-58 ◽  
Author(s):  
S. Kukla
Keyword(s):  
Production Systems ◽  
Work Organization ◽  
Production Equipment ◽  
Limiting Factors ◽  
System A ◽  
Iron Castings ◽  
The Times ◽  
Modelling And Optimization ◽  
Bulk Production ◽  
Made In

Abstract The paper presents a practical example of improvement of foundry production systems in terms of post-finishing of nodular iron castings produced in the conditions of bulk production for automotive industry. The attention was paid to high labour-intensive efforts, which are difficult to be subjected to mechanization and automation. The times of actions related to grinding processing of castings in three grinding positions connected with a belt conveyor were estimated with the use of a time study method. A bottleneck as well as limiting factors were specified in a system. A number of improvements were proposed, aimed at improving work organization on the castings post-finishing line. An analysis of work ergonomics at the workplace was made in order to eliminate unnecessary and onerous for the employee actions. A model of production system using the Arena software, on which a simulation experiment was conducted, was drawn up in order to visualize the analysed phenomena. The effects of the project were shown on graphs comparing times, costs, work ergonomics and overall efficiency of production equipment indicator.

PERSEPSI MASYARAKAT DESA SAYANG RW 03 KECAMATAN JATINANGOR KABUPATEN SUMEDANG TERHADAP PENTINGNYA PROTEKSI KENDARAAN BERMOTOR

Dharmakarya ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 145
Author(s):  
Lienda Noviyanti
Keyword(s):  
Everyday Life ◽  
Vehicle Ownership ◽  
Human Needs ◽  
Individual Knowledge ◽  
The Times ◽  
And Behavior ◽  
Motorized Vehicles ◽  
Perception Survey ◽  
Made In ◽  
Lack Of Knowledge

As the times and technology became more sophisticated, human needs and mobility also increased. One such technology is vehicle. It cannot be denied that motorized vehicles and cars have now become the most important parts of everyday life. Vehicle protection is very important to keep vehicles safe, especially in areas prone to theft. Protection of the vehicle itself is divided into two ways, namely by personal and insurance methods. The fact is that vehicle protection carried out by Desa Sayang residents is still very minimal, which is caused by a lack of knowledge and understanding of citizens about the importance of vehicle protection. Seen from only a few residents who have insurance services to protect their vehicles. Measuring the perceptions of residents of RW 03 Desa Sayang, Jatinangor Subdistrict, Sumedang Regency is divided into 2 things, namely knowledge (cognition) and behavior (konasi). Of the 97 informants interviewed, it was found that people's knowledge of insurance was not good. While their knowledge of vehicle protection in general is quite good. In addition, vehicle ownership also affects individual knowledge of insurance and vehicle protection. Unfortunately, protection of vehicles in the form of insurance is rarely done by residents because most are hampered in terms of costs and feel they do not need it. Therefore, a perception survey and vehicle protection socialization were made in Sayang Village, Jatinangor Sub-District, Sumedang Regency so that residents would be more aware of maintaining their vehicles.

scholarly journals Study and Analysis of Interference Signals of the LTE System of the GNSS Receiver

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4901
Author(s):  
Lucjan Setlak ◽  
Rafał Kowalik
Keyword(s):  
End User ◽  
Current Time ◽  
Gnss Receiver ◽  
System A ◽  
Telecommunication Systems ◽  
Depth Analysis ◽  
Gnss Receivers ◽  
Interference Signals ◽  
The Subject ◽  
Made In

Sometimes, it is impossible to conduct tests with the use of the GNSS system, or the obtained results of the measurements made differ significantly from the predicted accuracy. The most common cause of the problems (external factors, faulty results) are interference disturbances from other radio telecommunication systems. The subject of this paper is to conduct research, the essence of which is an in-depth analysis in the field of elimination of LTE interference signals of the GNSS receiver, that is based on the developed effective methods on counteracting the phenomenon of interference signals coming from this system and transmitted on the same frequency. Interference signals are signals transmitted in the GNSS operating band, and unwanted signals may cause incorrect processing of the information provided to the end-user about his position, speed, and current time. This article presents methods of identifying and detecting interference signals, with particular emphasis on methods based on spatial processing of signals transmitted by the LTE system. A comparative analysis of the methods of detecting an unwanted signal was made in terms of their effectiveness and complexity of their implementation. Moreover, the concept of a new comprehensive anti-interference solution was proposed. It includes, among others, information on the various stages of GNSS signal processing in the proposed system, in relation to the algorithms used in traditional GNSS receivers. The final part of the article presents the obtained research results and the resulting significant observations and practical conclusions.

"A FESTIVAL OF BRIGANDS": IN SEARCH OF DEMOCRACY AND POLITICAL LEGITIMACY IN MALI

2020 ◽  
Vol 35 (2) ◽  
Author(s):  
Bruce Whitehouse
Keyword(s):  
Political Legitimacy ◽  
Warning Signs ◽  
Democratic Transitions ◽  
Weak State ◽  
Coup D'etat ◽  
State Institutions ◽  
System A ◽  
The Government ◽  
Systemic Corruption ◽  
Made In

Mali's coup d'état in March 2012 and the subsequent occupation of northern Mali by Islamist and separatist rebels took many observers by surprise. How could an erstwhile model of peaceful democratic transition collapse so swiftly? Why did so few ordinary Malians stand up in defence of their 20-year-old democracy? Combining accounts from Malian and foreign journalists with observations made in Bamako leading up to and during the dramatic events of early 2012, this article assesses the failures of Mali's pre-coup political system. A combination of the tenuous rule of law, weak state institutions, and perceptions of systemic corruption deeply eroded Malians' faith in their democracy. The junta that ousted Mali's elected president in March 2012, despite its international isolation, skillfully manipulated public frustrations with the government as well as local symbols and discourses pertaining to heroic leaders to gain support and legitimacy at home. The crisis in Mali was preceded by certain warning signs, some of which might be applied to gauge the health of democratic transitions elsewhere in Africa.

scholarly journals POLITIK HUKUM DALAM PEMBAHARUAN PERATURAN EKSTRADISI DI INDONESIA DIHUBUNGKAN DENGAN UNITED NATIONS MODEL TREATY ON EXTRADITION OF 1990

2019 ◽  
Vol 4 (1) ◽  
pp. 1-19
Author(s):  
Zarisnov Arafat ◽  
Muhammad Gary Gagarin Akbar
Keyword(s):  
International Relations ◽  
United Nations ◽  
20Th Century ◽  
Criminal Law ◽  
The State ◽  
Territorial Sovereignty ◽  
Similarities And Differences ◽  
The United Nations ◽  
The Times ◽  
Made In

Ekstradisi secara universal hingga saat ini mengalami perubahan yang semakin baik, terutama setelah kehidupan bernegara sudah mulai tampak lebih maju sampai abad 20 ini. Hubungan dan pergaulan internasional menemukan bentuk dan substansinya yang baru dan berbeda dengan zaman sebelum Perjanjian Perdamaian Westphalia tahun 1648. Negara-negara yang berdasarkan atas prinsip kemerdekaan kedaulatan dan kedudukan sederajat mulai menata dirinya masing-masing terutama masalah domestik dengan membentuk dan mengembangkan hukum nasionalnya, yang salah satunya di bidang hukum pidana nasional. Hukum pidana nasional masing-masing negara, terutama jenis-jenis kejahatan atau tindak pidananya, disamping pula ada kesamaan dan perbedaannya. Semakin menguat batas wilayah dan kedaulatan teritorial masing-masing negara, semakin menguat pula penerapan hukum nasionalnya di dalam batas wilayah negara masing-masing. Semakin banyaknya perjanjian-perjanjian yang dibuat oleh negara-negara baik bilateral ataupun multilateral untuk mengatur suatu masalah tertentu yang sudah, sedang, dan akan dihadapi. Dalam pembuatan perjanjian tersebut mulai dilakukan pengkhususan atas substansinya, jadi tidak lagi satu perjanjian mencakup berbagai macam substansi yang berbeda-beda. Di Indonesia peraturan mengenai Ekstradisi dibuat pada tahun 1979, mengingat hingga saat ini belum terjadi perubahan di dalam Undang-Undang Nomor 1 Tahun 1979 padahal PBB telah membuat suatu model pembuatan perjanjian ekstradisi pada tahun 1990, sehingga sudah selayaknya peraturan mengenai ekstradisi di Indonesia harus mengalami pembaharuan ke depan yang lebih baik. Kata Kunci: Ekstradisi, Politik Hukum, Hukum Pidana.   Abstract Extradition is universally up to now experiencing increasingly good changes, especially after the state of life has begun to appear more advanced until the 20th century. International relations and relationships find new and different forms and substance from the times before the Treaty of Peace of Westphalia in 1648. Countries that are based on the principle of freedom of sovereignty and equal position begin to organize themselves, especially domestic problems by forming and developing national laws, which one of them is in the field of national criminal law. The national criminal law of each country, especially the types of crime or criminal acts, besides there are similarities and differences. The stronger regional boundaries and territorial sovereignty of each country, the stronger the application of national laws within the borders of each country. The increasing number of agreements made by countries both bilaterally and multilaterally to regulate a particular problem that has been, is being, and will be faced. In making these agreements, specialization of the substance began to be carried out, so no more than one agreement covers a variety of different substances. In Indonesia, the Extradition regulation was made in 1979, considering that until now there had been no changes in Law Number 1 of 1979 even though the United Nations had made a model for making an extradition treaty in 1990, so that proper regulations on extradition in Indonesia must undergo reform better future.                                   Keyword: Extradition, Politics of Law, The Criminal Law.                                                                        

scholarly journals Rancang Bangun Sistem Pembangkit Listrik Tenaga Air Menggunakan Konsep Hydrocat

2021 ◽  
Vol 4 (1) ◽  
pp. 7
Author(s):  
Syaiful Anwar ◽  
Muhamad Taufiq Tamam ◽  
Itmi Hidayat Kurniawan
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
System Design ◽  
Electrical Energy ◽  
Hydroelectric Power ◽  
Depth Level ◽  
Irrigation Channel ◽  
Water Turbine ◽  
The Times ◽  
Made In

Seiring perkembangan jaman, saat ini energi listrik telah menjadi salah satu kebutuhan primer dalam kehidupan sehari-hari, baik untuk melakukan pekerjaan ataupun kegiatan yang lainnya. Pembangkit Listrik Tenaga Air atau PLTA dengan menggunakan konsep hydrocat merupakan sebuah konsep pembangkit listrik yang diciptakan untuk aliran jalur irigasi yang memiliki ukuran tidak terlalu besar dan tingkat kedalamannya yang rendah. Oleh karena itu dibuatlah rancang bangun sistem pembangkit listrik menggunakan konsep hydrocat. Pada penelitian ini menggunakan generator DC sebagai sumber tenaga listrik dan menggunakan jenis turbin undershot. Penelitian ini dilakukan di Desa Karang Cegak Kecamatan Kutasari Kabupaten Purbalingga. Beban pada penelitian ini menggunakan lampu LED SMD 1,2 Watt, 2,4 Watt 3,6 Watt, dan 4,8 Watt. Alat ini mampu menghasilkan putaran pulley turbin air sebesar 69,2 rpm, 60,8 rpm, 59,0 rpm, 58,7 rpm, 57,1 rpm, dan 56,7 rpm. Putaran pulley generator DC sebesar 595,9 rpm, 586,1 rpm, 520,1 rpm, 506,2 rpm, dan 496,0 rpm. Besar tegangan yang dihasilkan 31,86 Volt, 9,20 Volt, 8,61 Volt, 8,38 Volt, dan 8,25 Volt. Besar arus yang dihasilkan sebesar 0,02 Ampere, dan besar daya yang dihasilkan sebesar 0,1836 Watt, 0,1718 Watt, 0,1671 Watt, dan 0,165 Watt.Along with the development of the times, nowadays electrical energy has become one of the primary needs in everyday life, both for doing work or other activities. Hydroelectric Power or Hydroelectric Power using the hydrocat concept is a power generation concept created for irrigation channel flow that is not too large and has a low depth level. Therefore, a power plant system design using the hydrocat concept was made. In this study using a DC generator as a source of electricity and using a type of undershot turbine. This research was conducted in Karang Cegak Village, Kutasari District, Purbalingga Regency. The load in this study uses 1.2 Watt SMD LED lamps, 2.4 Watt 3.6 Watt, and 4.8 Watt. This tool is capable of producing water turbine pulley rotation of 69.2 rpm, 60.8 rpm, 59.0 rpm, 58.7 rpm, 57.1 rpm, and 56.7 rpm. DC generator pulley rotation of 595.9 rpm, 586.1 rpm, 520.1 rpm, 506.2 rpm, and 496.0 rpm. The resulting voltages are 31.86 Volts, 9.20 Volts, 8.61 Volts, 8.38 Volts, and 8.25 Volts. The amount of current generated is 0.02 Ampere, and the amount of power generated is 0.1836 Watt, 0.1718 Watt, 0.1671 Watt, and 0.165 Watt.

SOLVING SPATIAL CONSTRAINTS WITH GLOBAL DISTANCE COORDINATE SYSTEM

2006 ◽  
Vol 16 (05n06) ◽  
pp. 533-547 ◽  
Author(s):  
LU YANG
Keyword(s):  
Coordinate System ◽  
Systematic Approach ◽  
Distance Geometry ◽  
Spatial Constraints ◽  
Constraint Equations ◽  
System A ◽  
Short Program ◽  
Complete Set ◽  
Point Line ◽  
Made In

A systematic approach making use of distance geometry to solve spatial constraints is introduced. We demonstrate how to create the constraint equations by means of a relevant distance coordinate system. A short program is made (in Maple) which implements the algorithm producing automatically a complete set of constraint equations for a given point-plane configuration. The point-line-plane configurations are converted into point-plane ones beforehand.

An Active Low Cost Mesh Networking Indoor Tracking System

2014 ◽  
Vol 6 (1) ◽  
pp. 45-79 ◽  
Author(s):  
Sean Carlin ◽  
Kevin Curran
Keyword(s):  
Tracking System ◽  
Low Cost ◽  
Cost Effective ◽  
Limiting Factors ◽  
Unique Contribution ◽  
Scalable Vector Graphics ◽  
Web Technologies ◽  
Working Environments ◽  
System A ◽  
The Cost

Indoor radio frequency tracking systems are generally quite expensive and can vary in accuracy due to interference, equipment quality or other environmental factors. Due to these limiting factors of the technology, many businesses today find it hard to justify investing in RFID tracking technologies to improve the safety, efficiency and security of their working environments. The aim of this project was to provide a budget RFID tracking system that was capable of tracking a person or object through an indoor environment. To minimize the cost of the RFID tracking system, the components of the system were built from existing electronic equipment and hardware. The software was also written to minimize licensing and support fees allowing a cost effective budget RFID tracking system to be developed. The tracking system consists of a tag, reader nodes and a PC reader which utilize synapse RF 100 engines with python scripts embedded on to the chips. The tracking system software operates through a web portal utilizing web technologies such as HTML, JavaScript and PHP to allow the tags location to be represented on a two dimensional map using scalable vector graphics. During development of the system a new trilateration algorithm was developed and used convert the signals received from the tag to a virtual position on the map correlating to the actual physical position of the tag. A unique contribution of this system is the low cost of building which we estimate as less than £200 UK sterling for a five node system.

Description of the New Hospital Wings at James Murray's Royal Asylum, Perth

1890 ◽  
Vol 36 (153) ◽  
pp. 172-186
Author(s):  
A. R. Urquhart
Keyword(s):  
Annual Report ◽  
Medical Experience ◽  
Effective Care ◽  
Mental Diseases ◽  
Care And Treatment ◽  
The Times ◽  
Made In

It is now sixty-two years since James Murray's Royal Asylum was opened for the reception of patients; and, in the course of its history, many changes have been made in the architectural arrangements. The original directors were actuated by motives of the purest philanthropy, and laid down, in their first annual report, principles of action from which their successors have never deviated. These principles of action, however, were not and could not be carried out in practice in those days, when modern ideas were but nascent; and the most eminent Scottish architect of his day, guided by the most mature medical experience of the times, could not design such buildings as are now held as requisite for the treatment of mental diseases. The alterations and improvements found to be necessary, in order to maintain this institution in the front rank, were inaugurated some five-and-twenty years ago by the conversion of the dark and winding central staircase into a cheerful galleried hall. The light and air thus admitted, and the feeling of freedom thus installed, proved the keynote to the successive changes that have been wrought from year to year since that time. Hardly any part of the establishment has escaped the modernizing and re-arranging deemed necessary for effective care and treatment. The year 1887, however, found existing wards well-adapted for the chronic and quiet classes, but unsuitable for acute and infirm cases. It was, therefore, decided to add such accommodation as was found necessary, and this paper is intended to describe the leading features of the buildings designed for that purpose.

EFFECT OF ADDED TIP MASS ON THE NONLINEAR FLAPWISE AND CHORDWISE VIBRATION OF CANTILEVER COMPOSITE BEAM UNDER BASE EXCITATION

2012 ◽  
Vol 12 (02) ◽  
pp. 285-310 ◽  
Author(s):  
M. EFTEKHARI ◽  
M. MAHZOON ◽  
S. ZIAEI-RAD
Keyword(s):  
Cantilever Beam ◽  
Multiple Scales ◽  
Equilibrium Points ◽  
Laminated Composite ◽  
Base Excitation ◽  
System A ◽  
Autoparametric Resonance ◽  
The Stability ◽  
Tip Mass ◽  
Made In

In this paper, a comparative study is performed for a symmetrically laminated composite cantilever beam with and without a tip mass under harmonic base excitation. The base is subjected to both flapwise and chordwise excitations tuned to the primary resonances of the two directions and conditions of 2:1 autoparametric resonance. In the literature, the governing nonlinear equations of the same problem without tip mass have been derived using the extended Hamilton's principle. Extension is made in this study to include the effect of a tip mass on the response of the beam. The natural frequencies are obtained numerically using the diversity guided evolutionary algorithm (DGEA). Next, the multiple scales method is applied to determine the nonlinear response and stability of the system. A set of four first-order differential equations describing the modulation of the amplitudes and phases of interacting modes are derived for the perturbation analysis. For verification, the above equations are reduced to the special case of the cantilever beam without tip mass for comparison with existing results. Finally, the effect of the tip mass on the stability of the fixed points and on the amplitude of oscillation about the equilibrium points in both the frequency and force modulation responses is examined.

A Sensor-Driven Approach to Distributed Shop Floor Planning and Control

2003 ◽  
Author(s):  
Lihui Wang ◽  
Weiming Shen ◽  
Xiaoqian Li ◽  
Sherman Lang
Keyword(s):  
Shop Floor ◽  
Seamless Integration ◽  
Intelligent Sensor ◽  
Planning And Control ◽  
Intelligent Sensors ◽  
System A ◽  
Floor Planning ◽  
High Level ◽  
And Control ◽  
Made In

The objective of this research is to develop methodology and framework for distributed shop floor planning, real-time monitoring, and remote device control supported by intelligent sensors. An intelligent sensor serves runtime data from bottom up to facilitate high-level decision-making. It assures that correct decisions are made in a timely manner, if compared with the best estimations of engineers. Being an adaptive system, a so-designed framework will improve the flexibility and dynamism of shop floor operations, and provide a seamless integration among process planning, resource scheduling, job execution, process monitoring, and device control. This paper presents principles of the methodology, details in architecture design, module interactions, information flow, and a proof-of-concept prototype implementation.

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