Study of Novel Spring Unit for Longstroke Semi-Auto Sliding Mechanism of Information Technology Applications

2014 ◽  
Vol 136 (7) ◽  
Author(s):  
Y. P. Jeon ◽  
H. Y. Seo ◽  
J. D. Kim ◽  
C. G. Kang
Keyword(s):  
Life Cycle ◽  
Mechanical Performance ◽  
Cellular Phone ◽  
Cellular Phones ◽  
Force Measurements ◽  
Screen Size ◽  
Sliding Mechanism ◽  
Technology Applications ◽  
Long Stroke ◽  
Sliding Force

Currently, there is intense competition in the industry for the development of new portable handsets. Maximizing the screen size and enhancing the performance are of utmost importance for the design of contemporary cellular phones. In particular, a sliding phone has a greater number of functions than other types of cellular phones, and the screen size of a sliding phone is relatively larger. However, because the existing spring units have limitations in terms of their mechanical performance, it is impossible for the display size to be maximized by transferring shortcut buttons, called navi-keys, which are located on the same plane of the display unit. The life cycle of a sliding phone is inversely proportional to the degree of spring deformation, which in turn depends on the sliding stroke. Therefore, a long-stroke sliding mechanism was investigated, and the manufacturing process for a novel sliding spring unit was proposed without increasing the thickness of the existing cellular phone. The possibility of performing semi-auto sliding strokes (>60 mm) was verified by flatness tests, life cycle tests, and sliding-force measurements. The performance of the designed spring unit was verified by carrying out reliability tests such as life cycle tests under the condition that the number of strokes was more than 100,000 and measurement tests to check whether the sliding force exceeded 250 gf.

Novel Spring and its Manufacturing Process for Semi Auto Sliding Mechanism to Maximize Function and Minimize Thickness of Portable Application

2012 ◽  
Vol 445 ◽  
pp. 114-119 ◽  
Author(s):  
Y.P. Jeon ◽  
H.Y. Seo ◽  
Chung Gil Kang
Keyword(s):  
Mobile Phone ◽  
Manufacturing Process ◽  
Cellular Phone ◽  
Forming Process ◽  
The Past ◽  
Limited Space ◽  
Sliding Mechanism ◽  
Assembly Structure ◽  
Long Stroke ◽  
Made In

Various portable applications such as a mobile phone, MP3 player, PMP player and so on, have been continuously developing with influencing on each other. In this environment, functions of IT applications have been built in the mobile phone, and consequently, the additions of them increase the size of the phone. However, the sizes of present phones have changed less than those of the past, and this trend is expected to be continued in the future because of the inherent characteristics mobility and portability of the phone. Great strides made in the industries manufacturing cellular phone components have facilitated the development of phones having similar size to the existing phone. However, in common, there are limitations on the extent to which the sizes of the parts can be reduced because of the technical reasons pertaining to mechanical or electrical properties, the forming process and assembly structure. In such a scenario, the use of a slide mechanism is the practical alternative for maintaining the mobility and portability. Reduction of the sliding space has a decisive effect on the decrease of the phone size. Therefore, a study of a novel spring to be manufactured by the etching process was performed to minimize the thickness. Meanwhile, the use of the slide mechanism is advantageous for maximizing visibility and increasing functionality with the limited space which are of utmost importance for the design of a contemporary cellular phone. In addition, various extra function keys including the main keypad buttons are required to maximize the visibility. However, the sliding stroke must increase to have them, and the existing spring units cannot be satisfied with the requirements under the limited space. Therefore, the study of a long-stroke spring unit and its manufacturing process to minimize the thickness with the stroke of 60 mm was performed.

scholarly journals A Life-Cycle Approach to Integrate Environmental and Mechanical Properties of Blended Cements Containing Seashell Powder

2021 ◽  
Vol 13 (23) ◽  
pp. 13120
Author(s):  
Fatemeh Soltanzadeh ◽  
Ali E. Behbahani ◽  
Eduardo N. B. Pereira ◽  
Carlos A. Teixeira
Keyword(s):  
Life Cycle ◽  
Carbon Dioxide Emissions ◽  
Mechanical Performance ◽  
Raw Materials ◽  
Blended Cement ◽  
Cement Industry ◽  
Optimal Dosage ◽  
Life Cycle Approach ◽  
Natural Pozzolan ◽  
Cement Production

The adverse consequences of producing ordinary Portland cement (OPC) on the environment have introduced cement production as the fourth largest source of anthropogenic carbon emissions after petroleum, coal, and natural gas. Managing and reducing the environmental concerns regarding the impacts of cement production on the environment, namely the depletion of non-renewable fuel resources, consumption of natural raw materials, and releasing huge amounts of CO2 into the atmosphere should be, therefore, one of the key priorities of the cement industry. Application of locally available minerals and wastes that can be blended with OPC as a substitute could considerably reduce the environmental impact. The present study evaluates the potentiality of waste seashell to be used as an additive in the production of blended cement through a modified life cycle approach integrating environmental and mechanical performances. In this regard, 34 cements consisting of different blends of OPC, seashell powder (within the range of 4–30% by OPC mass), and natural pozzolan (up to 30% by OPC mass) were tested to identify the optimal dosage of OPC substitution. Environmental impacts of the cements were assessed through life-cycle analysis. The possibility of mitigating the carbon dioxide emissions in the production of cements, with similar mechanical performance compared to that of OPC, was evaluated by considering both the mechanical and environmental results. The outcome of this study introduced more environment-friendly and sustainable options for future cements.

A Pedestrian Navigation System Using Cellular Phone Video-Conferencing Functions

2012 ◽  
Vol 2012 ◽  
pp. 1-8
Author(s):  
Akihiko Sugiura ◽  
Takuya Shoji
Keyword(s):  
Global Positioning System ◽  
Video Conferencing ◽  
Cellular Phone ◽  
Positioning System ◽  
Cellular Phones ◽  
Gps Technology ◽  
Pedestrian Navigation ◽  
Global Positioning ◽  
Positional Precision ◽  
Subterranean Environment

A user’s position-specific field has been developed using the Global Positioning System (GPS) technology. To determine the position using cellular phones, a device was developed, in which a pedestrian navigation unit carries the GPS. However, GPS cannot specify a position in a subterranean environment or indoors, which is beyond the reach of transmitted signals. In addition, the position-specification precision of GPS, that is, its resolution, is on the order of several meters, which is deemed insufficient for pedestrians. In this study, we proposed and evaluated a technique for locating a user’s 3D position by setting up a marker in the navigation space detected in the image of a cellular phone. By experiment, we verified the effectiveness and accuracy of the proposed method. Additionally, we improved the positional precision because we measured the position distance using numerous markers.

Mobility and Multimodal User Interfaces

2008 ◽  
pp. 996-1005
Author(s):  
Christopher J. Pavlovski ◽  
Stella Mitchell
Keyword(s):  
Mobile Phone ◽  
User Interfaces ◽  
Search Engines ◽  
Cellular Phones ◽  
Future Trends ◽  
Screen Size ◽  
Multimodal User Interfaces ◽  
Mobile Office ◽  
General Mobility

In this article we discuss multimodal technologies that address the technical and usability constraints of the mobile phone or PDA. These environments pose several additional challenges over general mobility solutions. This includes computational strength of the device, bandwidth constraints, and screen size restrictions. We outline the requirements of mobile multimodal solutions involving cellular phones. Drawing upon several trial deployments, we summarize the key designs points from both a technology and usability standpoint, and identify the outstanding problems in these designs. We also outline several future trends in how this technology is being deployed in various application scenarios, ranging from simple voice-activated search engines through to comprehensive mobile office applications.

scholarly journals Research on corrosion protection of earthing device of electric transmission line

2019 ◽  
Vol 136 ◽  
pp. 04057
Author(s):  
Xianri Wang ◽  
Xinmin Yu
Keyword(s):  
Life Cycle ◽  
Transmission Line ◽  
Economic Performance ◽  
Mechanical Performance ◽  
Electrical Performance ◽  
Actual Situation ◽  
Electric Transmission ◽  
Electric Transmission Line ◽  
Whole Life Cycle ◽  
Selection Of

The selection of insulator is analyzed and studied in detail in combination with climate and pollution.In this paper, several comparison and selection schemes are studied in detail from the aspects of electrical performance, mechanical performance, economic performance and so on. Through the analysis of the whole life cycle and the combination of the actual situation of the project, the reasonable selection of insulators is carried out to make use of insulators to reach the optimal.

The Review about a New Type of Bridge Structure — Semi–Integral Abutment Jointless Bridge

2011 ◽  
Vol 368-373 ◽  
pp. 72-75
Author(s):  
Tian Li Wang ◽  
Qing Ning Li ◽  
Da Lin Hu
Keyword(s):  
Life Cycle ◽  
Temperature Effect ◽  
Mechanical Performance ◽  
Bridge Structure ◽  
Expansion Joint ◽  
Integral Abutment ◽  
Life Cycle Design ◽  
Weak Part ◽  
New Type ◽  
Jointless Bridge

It was well known that expansion joint of a bridge was a weak part of structure, it led to early structure destroy and reduced the bridge life. Basing on Life-Cycle Design of bridge structure , a new type of optimum bridge structure --- Semi–Integral Abutment Jointless Bridge was put forward. Firstly the new bridge structure was defined and its performance was described. Then several problems that included temperature effect, the interaction of structure-soil etc were discussed about the application of the new bridge structure. Finally the conclusion is the Semi–Integral Abutment Jointless Bridge is a kind of durable bridge structure that has rational mechanical performance and great practical value.

Risky Driving: Relationship Between Cellular Phone and Safety Belt Use

2003 ◽  
Vol 1843 (1) ◽  
pp. 20-23 ◽  
Author(s):  
David W. Eby ◽  
Lidia P. Kostyniuk ◽  
Jonathon M. Vivoda
Keyword(s):  
Logistic Regression ◽  
Regression Model ◽  
Logistic Regression Model ◽  
Motor Vehicle ◽  
Cellular Phone ◽  
Motor Vehicle Crash ◽  
Public Health Issue ◽  
Cellular Phones ◽  
Safety Belt ◽  
Phone User

The main purpose of the study was to explore the relationship between cellular phone and safety belt use. Rates of safety belt use of drivers using and drivers not using handheld cellular phones were compared. All data for safety belt and handheld cellular phone use were collected through direct observation while vehicles were stopped at intersections and freeway exit ramps in Michigan. Data were weighted to be representative of drivers during daylight hours in Michigan. Analyses included statistical comparisons of safety belt use rates and a logistic regression model to determine the effects of handheld cellular phone use on safety belt use. The study found that safety belt use for drivers using a handheld cellular phone was significantly lower than for drivers not using cellular phones. This same significant relationship was found within nearly all demographic categories analyzed. The logistic regression model showed that the odds of a handheld cellular phone user not using a safety belt were 1.77 times that of a driver not using a cellular phone. These results stress the importance of the public health issue posed by cellular phone use; not only are those who are conversing on cellular phones potentially more likely to be in a motor vehicle crash, they are also more likely to sustain greater injury because of the lack of safety belt use.

scholarly journals An Optimal Burn-In Policy for Cellular Phone Lithium-Ion Batteries Using a Feature Selection Strategy and Relevance Vector Machine

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3021 ◽  
Author(s):  
Jinsong Yu ◽  
Jie Yang ◽  
Diyin Tang ◽  
Jing Dai
Keyword(s):  
Feature Selection ◽  
Lithium Ion Batteries ◽  
Feature Selection Method ◽  
Lithium Ion ◽  
Cellular Phone ◽  
Relevance Vector Machine ◽  
Test Method ◽  
Selection Strategy ◽  
Feature Subset ◽  
Cellular Phones

The early detection of defective lithium-ion batteries in cellular phones is critical due to the rapid increase in popularity and mass production of cellular phones. It is essential for manufacturers to design an optimal burn-in policy to differentiate between normal and weak batteries in short cycles prior to shipping them to the marketplace. A novel approach to determine the optimal burn-in policy using a feature selection strategy and relevance vector machine (RVM) is proposed. The sequential floating forward search (SFFS) is used as the feature selection method to find an optimal feature subset from the entire sequence of the batteries’ quality characteristics while preserving the original variables. Given the selected feature subset, the RVM is applied to classify batteries into two groups and simultaneously obtain the posterior probabilities. To achieve better discrimination performance with less risk, a new characteristic is extracted from the discharge profile. Subsequently, an optimization cost model is developed by introducing a classification instability penalty to ensure the stability of the optimal number of burn-in cycles. A case study utilizing cellular phone lithium-ion batteries randomly selected from manufactured lots is presented to illustrate the proposed methodology. Furthermore, we conduct a comparison with the cumulative degradation (CD) method and non-cumulative degradation (NCD) method based on the Wiener process. The results show that our proposed burn-in test method performs better than comparable methods.

Combining Life Cycle Assessment and Linear Regression Analysis to Determine Significant Design Characteristics

2012 ◽  
Author(s):  
Ashley DeVierno ◽  
Brian Thorn ◽  
Andres L. Carrano
Keyword(s):  
Regression Analysis ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Linear Regression ◽  
Environmental Impact ◽  
End Of Life ◽  
Significant Relationship ◽  
Linear Regression Analysis ◽  
Cellular Phones ◽  
Design Characteristics

For designers it is difficult to pin-point the design characteristics that could be changed to reduce the environmental impact of their products. This paper describes a method for determining the design characteristics that have a significant relationship with environmental impact that arises at product end-of-life. In this method, Life Cycle Assessment (LCA) and Linear Regression Analysis (LRA) are combined. LCA is used to quantify the environmental impact of products from the extraction of their raw materials to their disposal. LRA is used to determine the design characteristics that have the most significant relationship with environmental impact. Combining LCA and LRA gives the designer the ability to (1) establish a relationship between design characteristics and their environmental impact, (2) determine the most significant design characteristics that influence environmental impact, and (3) validate design changes with their influence on product environmental impact. In the case study described here, the design characteristic, Volume, is shown to have significant relationship with the end-of-life environmental impact of cellular phones. This trend is consistent with the results of the one-phase end-of-life disposition assessments that evaluated disassembled cellular phones. With the results of this method, designers can focus their sustainable design efforts on modifying and improving the design characteristics that have the strongest relationship with environmental impact.

scholarly journals PENGGUNAAN KLIP VIDEO DARI YOUTUBE DI DALAM ACARA TELEVISI YANG BERSIFAT KOMERSIAL DIPANDANG DARI UNDANG-UNDANG No. 28 TAHUN 2014 TENTANG HAK CIPTA

2021 ◽  
Vol 17 (1) ◽  
pp. 94-102
Author(s):  
Retno Susilawati ◽  
Gunawan Bagaskoro
Keyword(s):  
Cellular Phone ◽  
Cellular Phones ◽  
Commercial Activity ◽  
Protection Measures ◽  
The Public ◽  
Video Sharing ◽  
Tv Show

The development of technology in cellular phones, cameras, digitalization, and internet create new opportunities in creating art, including cinematograpics creation and in sharing said creation to the public. Using a cellular phone, one can create and edit a film then upload saif film to video sharing platform such as Youtube, Vimeo, Metacafe, Dailymotion, etc. Problems arise when the uploaded films are being used, without the owner’s consent, for a commercial activity, in this case in a commercially TV show which has commercial slot in it. This article will discuss the afromentioned video usage in relation to Law No. 28 Year 2014 Regarding Copyright. The usage of uploaded videos in commercial activity infringes the copyright owner’s exclusive rights and in the process of obtaining the said video disables or circumvents technological protection measures put in place by the platform.   Keyword: copyright; video sharing platform; technological protection measures

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