New-Technique Drilling with Modulated Rotation Spindle Machine

2013 ◽  
Vol 816-817 ◽  
pp. 206-210 ◽  
Author(s):  
Takashi Inoue ◽  
Masahiro Hagino ◽  
Yuuki Kurita ◽  
Kimitoshi Watanabe ◽  
Kazuya Ueda ◽  
...  
Keyword(s):  
Cutting Force ◽  
Small Diameter ◽  
Resistance Force ◽  
Ti Alloy ◽  
Cutting Mechanism ◽  
Basic Principles ◽  
Cutting Resistance ◽  
Acceleration And Deceleration ◽  
Chip Discharge ◽  
The Relationship

In drilling deep holes with small-diameter tools in particular, chip shape is a major problem along with tool rigidity. In this study, we developed a spindle machine that has regularly repeating acceleration and deceleration regions in each drill rotation (called modulated rotation) as a new drilling spidle machine that can improve chip discharge ability. For an analysis of the cutting mechanism based on the basic principles of this device and its drilling characteristics, holes were drilled in CFRP, and Ti alloy (Ti-6A1-4V) materials using a straight shank drill. The relationship between the torque and thrust of cutting resistance force was obtained to show the relationship between cutting chips shape and cutting force. The characteristics of drilling with the developed spindle device were evaluated in comparison with regular drilling methods. It was found that the torque with this device was reduced by about 10% compared with general drilling. Outstanding chip breakup was seen with Titanium alloys in particular, as a result of which chip discharge could be improved.

Cutting resistance of flexible armour using multiple layers of triaxial kevlar fabric

2020 ◽  
pp. 152808372096827
Author(s):  
Magdi El Messiry ◽  
Shaimaa Youssef El-Tarfawy
Keyword(s):  
Cutting Force ◽  
Areal Density ◽  
Resistance Force ◽  
Knitted Fabric ◽  
Cutting Resistance ◽  
First Case ◽  
Weft Knitted Fabric ◽  
Cut Resistance ◽  
The Relationship ◽  
Resistance Value

The textiles capable of cutting resistance found applications in the industrial and military areas to construct flexible lightweight soft body armors. In the present work, a theoretical model to understand the mechanism of fabric cut resistance in a different direction for weft-knitted, triaxial, and multiple layers structures. An experimental study of cutting resistance force was done on weft-knitted fabric with Kevlar 29 triaxial fabrics in multiple layers structure to support derived mathematical model for the effect of multiple layers structure on their cutting force. The study examines specific cut resistance of the structure from four layers of Kevlar triaxial fabrics covered with knitted fabric on both sides. The angle of cutting force varied from 0°, 60°, and 90° with respect to the yarn inclination. Results show that the cutting force of the multilayer structure is linearly proportional to the number of Kevlar triaxial fabrics layers. The specific cut resistance value of the structure from four layers of Kevlar triaxial fabrics, covered with knitted fabric on both sides, reached 544, 435, and 326 (N/g/cm2) for cutting directions: angled 60°, vertical, and horizontal, respectively. In this work, the comparison between the triaxial fabric of high areal density and multiple layers of triaxial fabric with resultant same areal density indicates that a better specific cutting force was achieved in the first case. Furthermore, it investigated the relationship between triaxial surface density, the direction of cutting, and the number of triaxial fabric layers and discussed the optimum specific properties of the different structures.

Development of apparatus to evaluate cutting resistance of protective fabrics

2021 ◽  
pp. 004051752199467
Author(s):  
Magdi El Messiry ◽  
Elshiamaa Mohamed Eid
Keyword(s):  
Cutting Force ◽  
Cutting Speed ◽  
Cutting Mechanism ◽  
Textile Materials ◽  
Cutting Resistance ◽  
Normal Forces ◽  
New Apparatus ◽  
Materials Used ◽  
Protective Fabrics ◽  
Cutting Processes

In recent decades, attention has been focused on the design of protective soft fabrics against cutting. The anticipated textiles should shield the wearer's body from threats caused by pointed or sharp-edged objects, such as a knife, sharp blade, or spike. Therefore, as it is of great importance to design slash-resistant fabrics, it is also necessary to have an apparatus that gives the possibility to simulate the conditions of cutting processes of the protective fabric. The main objective of the present work is to develop a new apparatus to test the slash-proof materials used in soft protective armor or gloves. The apparatus can test the material with different cutting angles, different speeds, and various normal forces applied to the sample at the point of contact between the material and the cutting blade, with the capability to change all the parameters affecting the cutting force. This study aims to develop a cutting apparatus to study the cutting mechanism of textile materials with the capability to change all the parameters affecting the cutting force. The cutting angle and cutting speed have a significant effect on the maximum cutting force; however, the latter showed a high decrease of the maximum cutting force.

Theoretical Analysis and Simulation of the Effect of Vibration Amplitude on Cutting Force in Precision Ultrasonic Vibration Cutting

2007 ◽  
Vol 329 ◽  
pp. 693-698
Author(s):  
Ze Sheng Lu ◽  
L. Yang
Keyword(s):  
Cutting Force ◽  
Ultrasonic Vibration ◽  
Cutting Parameters ◽  
Sine Wave ◽  
Cutting Mechanism ◽  
Vibration Cutting ◽  
Ultra Precision ◽  
First Time ◽  
The Relationship ◽  
Ultrasonic Vibration Cutting

Precision ultrasonic vibration cutting is a promising technology in field of precision and ultra-precision machining. It is a kind of the pulsing cutting process with a constant vibration frequency and sine-wave amplitude of vibration. In this article, a rational model of cutting force in vibration cutting is established, and the vibration cutting mechanism is analyzed. Specially, by the method of numerical simulation, the effect regulation of amplitude of vibration on cutting force is theoretically discussed for the first time in precision vibration cutting. And the relationship between cutting parameters and cutting force is probed into on the different cutting conditions.

Kajian Sosiologis Terhadap Tema Lakon ‘Domba-domba Revolusi’ Karya Bambang Soelarto

Panggung ◽  
2014 ◽  
Vol 24 (1) ◽  
Author(s):  
Nur Sahid
Keyword(s):  
Sociological Theory ◽  
Essential Element ◽  
Literary Work ◽  
The Political ◽  
Basic Principles ◽  
Historical Figures ◽  
Sociology Of Art ◽  
The Creation ◽  
Relationship Of ◽  
The Relationship

ABSTRACTRevolutionary struggle in order to compete for the independence of Indonesia has been a source of inspiration Indonesian artists, including Bambang Soelarto who wrote drama Domba-domba Re- volusi (DDR). DDR studied drama is quite interesting because it tries to criticize the freedom fight- ers. This study aims to: first to know the theme and the problem plays DDR; second to determine the relationship of the socio - historical struggle in 1948 with the sociological elements of drama DDR themes and issues. This study uses sociological theory of art. The basic principles of the sociology of art is the fact that the creation of works of art influenced by the historical social conditions where the work was created. Research using content analysis of Krippendorf, the methods used to examine the symbolic phenomena with the aim to explore and express the observed phenomenon which is the content, meaning, and an essential element of the literary work. Based results of this research is that Bambang Soelarto as the author tries to capture di?erence between fighters during the struggle for the political aspirations for 1948 are expressed in a work of drama. Historical events inspired the creation of drama DDR. Soelarto want to respond to the political aspirations of the di?erence between historical figures and wanted to provide an assessment and outlook through DDR.Keywords: themes, drama, sociology of art, social historical ABSTRAKRevolusi perjuangan dalam rangka memperebutkan kemerdekaan Indonesia telah men- jadi sumber inspirasi para seniman Indonesia, termasuk Bambang Soelarto yang menulis drama Domba-domba Revolusi (DDR). Drama DDR cukup menarik diteliti karena mencoba mengkritisi para pejuang kemerdekaan. Penelitian ini bertujuan untuk: pertama, mengeta- hui tema dan permasalah drama DDR; kedua, mengetahui hubungan kondisi sosio-histo- ris perjuangan pada tahun 1948 dengan unsur-unsur sosiologis terimplisir pada unsur tema dan masalah drama DDR. Penelitian ini menggunakan teori sosiologi seni. Prinsip dasar dari sosiologi seni adalah adanya fakta bahwa penciptaan karya seni dipengaruhi oleh kon- disi sosial historis tempat karya itu diciptakan. Penelitian ini menggunakan metode con- tent analysis dari Krippendorf, yakni metode yang dipergunakan untuk meneliti fenome- na-fenomena simbolik dengan tujuan untuk menggali dan mengungkapkan fenomena yang teramati yang merupakan isi, makna, dan unsur esensial karya sastra. Berdasarkan hasil penelitian dapat diketahui bahwa Bambang Soelarto sebagai penulis mencoba un- tuk menangkap perbedaan antara pejuang aspirasi politik selama perjuangan tahun 1948 untuk diekspresikan dalam sebuah karya drama. Peristiwa sejarah mengilhami penciptaan drama DDR. Soelarto ingin menanggapi aspirasi politik perbedaan antara tokoh-tokoh se- jarah dan ingin memberikan penilaian dan pandangan pandangannnya melalui DDR.Kata kunci: tema, drama, sosiologi seni, sosial historis

scholarly journals Estimation of resistance force at steady-state sinkage for cylindrical wheel-typed lunar/planetary exploration rovers with function of push–pull locomotion

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Daisuke Fujiwara ◽  
Naoki Tsujikawa ◽  
Tetsuya Oshima ◽  
Kojiro Iizuka
Keyword(s):  
Steady State ◽  
Estimation Method ◽  
Planetary Exploration ◽  
Experimental Result ◽  
Resistance Force ◽  
Estimation Model ◽  
Loose Soil ◽  
Key Factor ◽  
The Relationship ◽  
Resistance Forces

Abstract Planetary exploration rovers have required a high traveling performance to overcome obstacles such as loose soil and rocks. Push-pull locomotion rovers is a unique scheme, like an inchworm, and it has high traveling performance on loose soil. Push-pull locomotion uses the resistance force by keeping a locked-wheel related to the ground, whereas the conventional rotational traveling uses the shear force from loose soil. The locked-wheel is a key factor for traveling in the push-pull scheme. Understanding the sinking behavior and its resistance force is useful information for estimating the rover’s performance. Previous studies have reported the soil motion under the locked-wheel, the traction, and the traveling behavior of the rover. These studies were, however, limited to the investigation of the resistance force and amount of sinkage for the particular condition depending on the rover. Additionally, the locked-wheel sinks into the soil until it obtains the required force for supporting the other wheels’ motion. How the amount of sinkage and resistance forces are generated at different wheel sizes and mass of an individual wheel has remained unclear, and its estimation method hasn’t existed. This study, therefore, addresses the relationship between the sinkage and its resistance force, and we analyze and consider this relationship via the towing experiment and theoretical consideration. The results revealed that the sinkage reached a steady-state value and depended on the contact area and mass of each wheel, and the maximum resistance force also depends on this sinkage. Additionally, the estimation model did not capture the same trend as the experimental results when the wheel width changed, whereas, the model captured a relatively the same trend as the experimental result when the wheel mass and diameter changed.

Evaluation and Modeling of Passenger Vehicle Celeration Performance Based on Artificial Neural Networks

2015 ◽  
Vol 744-746 ◽  
pp. 1938-1942
Author(s):  
Yi He ◽  
Duan Feng Chu
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Comfort Level ◽  
Subjective Rating ◽  
Acceleration Data ◽  
Acceleration And Deceleration ◽  
The Subject ◽  
Artificial Neural ◽  
The Relationship ◽  
Subjective Sensation

As the siginificant factors influence passengers comfort, the vehicle celebration performance may easy to cause accidents, such as hard acceleration and deceleration performance. In order to find the relationship between passengers comfort and celebration performance, 35 passengers and three professional drivers were recruited in the field experiment. The passengers’ comfort feelings were analysed by subject questionnaires, the acceleration and deceleration data were received by CAN bus.The Artificial Neural Networks (ANNs) model was elaborated to estimate and predict the passengers comfort level of driver unsafe acceleration behavior situations. Therefore, the subject views of the passengers could be compared to object acceleration data. An ANN is applied to interconnect output data (subjective rating) with input data (objective parameters). Finally, it is found the investigatioin have demonstrated that the objective values are efficiently correlated with the subjective sensation. Thus, the presented approach can be effectively applied to support the drive train development of bus.

scholarly journals Das Verstehen des Pädagogischen Dialogs als Bedingung der Kriminalitätsbekämpfung

2014 ◽  
Vol 1 (2) ◽  
Author(s):  
Ferdinand Potgieter ◽  
Hannes van der Walt ◽  
Charl Wolhuter
Keyword(s):  
Young People ◽  
Social Workers ◽  
Basic Principles ◽  
The World ◽  
Language Communication ◽  
The Relationship

The authors of this article investigate the possibility that the absence of pedagogical dialogues between educators and students can explain aspects of the incidence of crime, in particular acts of crime committed by young people. Based on this thesis and on basic principles of education, the relationship between language, communication and dialogue, as well as on the etiology and essential meaning, of the concept of „dialogue“, the authors demonstrate that education is fundamentally an act of dialogue. The acknowledgement of this ontological fact will not only promote acceptable relationships and behaviour among the youth, but will also assist educators and social workers in their venture against the wave of criminality which is threatening to overpower the world.

scholarly journals Peranan Majelis Pengawas Daerah (MPD) Terhadap Pengawasan Pelaksanaan Jabatan Notaris Di Kabupaten Tegal

Jurnal Akta ◽  
2018 ◽  
Vol 5 (1) ◽  
pp. 179
Author(s):  
Dwikky Bagus wibisono ◽  
Umar Ma’ruf
Keyword(s):  
Supervisory Board ◽  
Legal Protection ◽  
Field Research ◽  
Social Institutions ◽  
Judicial Process ◽  
Basic Principles ◽  
Approach Method ◽  
Data Collection Technique ◽  
Relationship Of ◽  
The Relationship

AbstrakLembaga Kenotariatan adalah salah satu lembaga kemasyarakatan yang ada di Indonesia, lembaga ini timbul dari kebutuhan dalam pergaulan sesama manusia yang menghendaki adanya suatu alat bukti mengenai hubungan hukum keperdataan yang ada dan atau terjadi diantara mereka.Metode pendekatan yang digunakan dalam penelitian ini adalah yuridis empiris, spesifikasi yang digunakan dalam penelitian ini bersifat deskriptif analitis, teknik pengumpulan data ini menggunakan penelitian lapangan dan studi kepustakaan.Notaris sebagai pejabat umum dalam menjalankan jabatannya perlu diberikan perlindungan hukum, antara lain pertama untuk tetap menjaga keluhuran harkat dan martabat jabatannya termasuk ketika memberikan kesaksian dan berproses dalam pemeriksaan dan persidangan. Kedua, merahasiakan akta keterangan yang diperoleh guna pembuatan akta dan ketiga, menjaga minuta atau surat-surat yang dilekatkan pada minuta akta atau protokol Notaris dalam penyimpanan Notaris. Ketiga hal inilah yang menjadi dasar dalam Pasal 66 UUJN dalam hal pemanggilan Notaris untuk proses peradilan, penyidikan, penuntut umum atau hakim dengan persetujuan Majelis Pengawas.Kata Kunci: Majelis Pengawas Daerah, Pengawasan,Jabatan Notaris AbstractsThe Notary Institution is one of the existing social institutions in Indonesia, this institution arises from the needs in the association of fellow human who wants a proof of the relationship of civil law existing and / or occur between them.The approach method used in this research is empirical juridical, the specification used in this research is analytical descriptive, this data collection technique using field research and literature study.Notary as a general official in carrying out his / her position needs to be given legal protection, among others, first to maintain the nobility of dignity and dignity of office including when giving testimony and proceeding in examination and trial. Second, to keep secret deeds obtained for making the deed and third, to keep the minuta or letters attached to the Minutes of Notary or Notary's protocol in the Notary's depository. These are the basic principles of Article 66 of the UUJN in the case of calling a Notary to the judicial, investigative, prosecutorial or judicial process with the approval of the Supervisory Board.Keywords:  Regional Supervisory Board,Supervision,Notary Position

scholarly journals [Student Acceptance of Course Curriculum Implementation of Islamic Basic Principles (Ctu 101) at Uitm] Penerimaan Pelajar Terhadap Pelaksanaan Kurikulum Kursus Prinsip-Prinsip Asas Islam (Ctu 101) di Uitm

2015 ◽  
Vol 9 ◽  
pp. 20-33
Author(s):  
Rubiah Abu Bakar ◽  
Abdul Manam Mohamad
Keyword(s):  
Pilot Study ◽  
Basic Principle ◽  
Curriculum Implementation ◽  
Study Data ◽  
Descriptive Statistics ◽  
Survey Study ◽  
Basic Principles ◽  
Significant Relationships ◽  
Institute Of Technology ◽  
The Relationship

This study aims to analyze the acceptance of students towards the implementation of the Basic Principles of Islam (CTU 101) course curriculum which is one of the Islamic Study Courses in UiTM (MARA Institute of Technology). The focus of this study is to investigate the level and relationship between students’ acceptance in terms of content, teaching and evaluation. This survey study involved 300 students who were randomly chosen and a set of questionnaires was utilized as the instrument of study. A pilot study was conducted among 30 students to determine the reliability of instrument used by using Alpha Cronbach with value 0.960, and value 0.964. A set of questionnaire consists of part A (demography background of participants) and part B, C, D and E (questions of variables) was used to collect data for this study. Data were analyzed by using Software SPSS version 17.0 (Statistic Packages For Sosial Science) and reported by using of descriptive statistics of min, percentage and median, and also by making inferences to analyzed the relationship among the variables. The findings of study show that participants positively accepted CTU 101 course with content min average of content 4.1733 (high), teaching 4.0693 (high) and evaluation 3.9996 (high). Besides that, correlation Pearson analysis was used to analyzed the relationship among the variables and for this study, it was found that significant relationship between the acceptance of participants with the content, teaching and evaluation aspect of CTU 101 course.  The high score of each aspect or variable and the significant relationships show that students positively accepted the course. However, a few aspects of the course should be given attention and a few improvements should be done in order to give students good perception towards Islamic Study Course.   Keyword: Acceptance, student, Basic Principle of Islam (CTU 101).

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