Mobile Phone Manufacturers Research Articles

제3자 복호화명령의 도입에 관한 비교법적 고찰

Even if the investigative agency knows that the crucial information necessary to investigate the crime is stored in the mobile phone, unless the password is released, there is no proper way to confirm or secure it. Although the number of cases requiring forensics that can find the substantive truth of a case using digital forensic technology is rapidly increasing every year, successful decryption of mobile phones is not so common that they are considered a major obstacle to digital forensics success. It is a social problem that the case is buried because the relevant information necessary for the discovery of the substantive truth of an important event is not secured in a timely manner.
 As a solution, the method of forcing the suspect to release the mobile phone password or requesting their cooperation through the decryption order system can be considered. However, this may excessively infringe on personal privacy and may violate the constitutionally guaranteed privilege to refuse self-incrimination. This is because the violation of the right to refuse to make a statement can be a problem depending on whether it is understood as personal information or a statement according to the characteristics of the mobile phone password.
 Therefore, it was investigated whether the introduction of the decryption order to unlock the password of the mobile phone infringes on the basic rights guaranteed by the Constitution. This is because the degree of protection will vary depending on whether the view of the password is personal information or personal information and whether it is a statement or not, that is, depending on the nature and status of the password. In this case, if it is impossible to force a decryption order on individuals such as criminal suspects due to the fundamental rights guaranteed in the Constitution, we examine whether it is possible to force a decryption order or request cooperation from a third party, a mobile phone manufacturer, to solve this problem. searched for. In particular, third parties and companies were divided into mobile phone manufacturers and information and communication service providers, and reviewed from the perspective of protection and exceptional use of personal information.
 In principle, personal information is subject to protection under the current law, and exceptional use other than the purpose of collection is specifically stipulated in the “Personal Information Protection Act”. However, since the specific interpretation and application are not necessarily clear, we looked at foreign legislative cases comparatively in relation to the provision of personal information to a third party. Although there are means to acquire, this method of cooperation takes a long time, so it was judged that it is not an appropriate means for securing evidence for digital crimes in the information society. In addition, the introduction of a decryption order to a third party is necessary as a means to secure criminal information not only to domestic companies under judicial jurisdiction but also to global companies abroad. It also struggled to find a harmonious way with an appropriate balance to raise the problem of discrimination.

Effect of the polymer on the joint strength of polymer/copper hybrids produced by nano-injection molding: Comparison of polybutylene terephthalate and polyphenylene sulfide via experimental and computational methods

Nano-injection molding is used in the automotive and mobile phone manufacturing industries to mass-produce polymer/metal hybrids with high joint strength. However, the polymer’s effect on the joint strength of such hybrids has not been fully elucidated. In the present study, we selected polybutylene terephthalate (PBT) and polyphenylene sulfide (PPS) to investigate the polymers’ effects on the joint strengths of polymer/metal hybrids, via experimental and computational methods. Scanning electron microscopy indicates that the interlocking effect that resulted from the flow of the polymer into the nanocavities ensured high tensile strength. Molecular dynamics simulations indicate that compared with the PPS/copper interface, the PBT/copper interface had a higher interfacial interaction energy and a higher maximum force in pull-out tests because of stronger van der Waals forces between the PBT and copper. The difference in joint strength between the two polymers was attributable to the rigidity of the polymer chains, which ensured greater detachment resistance. Therefore, this study offers insight into enhancing the joint strength of polymer/metal hybrids with a rigidity-driven joint.

Knowledge Sharing Efficiency Analysis Model Design of Internet Open Innovation Community

The emergence of Internet technology has changed the technological innovation path and knowledge acquisition paradigm of enterprises and promoted the construction of digital technology, digital platform, and digital infrastructure. A large number of companies have begun to create brand communities and obtain suggestions for product improvement and innovation from the communities. However, obtaining innovative opinions and inspiration through the community to the final realization is not achieved overnight. It needs to go through the process of knowledge sharing to user interaction, from user interaction to knowledge creation and discovery and from knowledge discovery to innovation contribution. To study the efficiency of Internet community innovation, it is necessary to decompose the innovation process into two parts: problem adoption and problem solution, and then analyze them separately to get the influence combination and path. Taking Xiaomi (one of the world’s largest mobile phone manufacturers) online community as an example, this article decomposes the process of issue solution into adoption stage and solution stage by crawling the relevant data of posts through web crawlers, takes the adoption efficiency and problem-solving efficiency as antecedents, and uses fuzzy set qualitative comparative analysis method to analyze the combination of conditions that affect the former two. It is of great significance to improve the knowledge sharing and innovation research of the open innovation community.

On the Use of Acoustic Methods for the Detection of Electrostatic Capture of Diaphragm in Capacitive MEMS Microphones

Most mobile phones today have capacitive micro-electro-mechanical systems (MEMSs) microphones that use either single or dual diaphragms. Methods to detect failures easily and non-invasively have become of critical importance for microphones mobile phone manufacturers as a basis for built-in self-test (BIST) and self-repair (BISR) strategies. In that regard, a four-layer framework is presented that includes lumped element modeling (LEM), failure mode simulation, failure mode discrimination, and recovery. The frequency response of the microphone is taken as the main output to analyze. To experimentally validate this framework, this article provides a failure mode induction method based on bias voltage sweeping and four new techniques, based solely on acoustic measurements to discriminate the states of electrostatic capture for single diaphragm capacitive MEMS microphones. These include 1) analysis of an acoustic signature that is unique to electrostatic capture based on cosine similarity analysis; 2) −3 dB point measurement; 3) +3 dB point measurement; and 4) cluster analysis. Measurement of pull-in voltage and snapback voltage ranges is further demonstrated based on sensitivity measurements in laboratory conditions and response magnitude and noise power measurements in non-laboratory conditions. Up to 100% success rate in detecting electrostatic capture of diaphragm is reported for this type of device.

ANALISIS MINAT DAN KEPUTUSAN PEMBELIAN MELALUI HARGA, KUALITAS DAN INOVASI

The development of communication technology causes smartphones to dominate the market, especially Chinese smartphone products. The number of Chinese products in the market is due to cheap and affordable prices, but not accompanied by good quality so that the Indonesian people already have their own views on Chinese products. However, Xiaomi as one of the mobile phone manufacturers from China in fact managed to become one of the kings of the smartphone market in Indonesia, this is because the price is affordable. This study aims to analyze interest and purchase decisions through price, quality and innovation. The results of data processing proved that all statement items were valid and all variables were reliable. The results showed that interest and purchasing decisions for Xiaomi smartphones in East Surabaya through price, quality and innovation were said to be moderate. Subsequent results show consumer interest and purchase decisions due to price and product quality, while innovation is not the cause of interest and purchase decisions for Xiaomi smartphones in East Surabaya, but purchasing decisions are due to price and product quality through interest first

Using mobile devices as scientific measurement instruments: Reliable android task scheduling

In various usage scenarios, smartphones are used as measuring instruments to systematically and unobtrusively collect data measurements (e.g., sensor data, user activity, phone usage data). Unfortunately, in the race towards extending battery life and improving privacy, mobile phone manufacturers are gradually restricting developers in (frequently) scheduling background (sensing) tasks and impede the exact scheduling of their execution time (i.e., Android’s “best effort” approach). This evolution hampers successful deployment of smartphones in sensing applications in scientific contexts, with unreliable and incomplete sampling rates frequently reported in literature. In this article, we discuss the ins and outs of Android’s background tasks scheduling mechanism, and formulate guidelines for developers to successfully implement reliable task scheduling. Implementing these guidelines, we present a software library, agnostic from the underlying Android scheduling mechanisms and restrictions, that allows Android developers to reliably schedule tasks with a maximum sampling rate of one minute. Our evaluation demonstrates the use and versatility of our task scheduler, and experimentally confirms its reliability and acceptable energy usage.

Factors Influencing Purchasing Behavior of Mobile Phone Consumers: Evidence from Bangladesh

An increase in using mobile phones and the availability of many phone brands induced the customers to consider various preferences in purchasing decisions. This descriptive study aimed to determine the factors that affect customers’ preferences to buy a cellular phone. The primary data was collected from a survey among the smartphone users in different age groups through a structured questionnaire. The study results show that more than 70 percent of smartphone users belong to the age group under 40 years. The study found that, among the factors examined, product features, brand image, price, and product quality are the most significant factors influencing the Bangladeshi customers to buy smartphones. The study’s findings have critical implications to mobile phone manufacturers to achieve competitive advantages in the market.

BRAND TRANSFER BY HANDPHONE CONSUMERS IN THE CITY OF JUANG BIREUEN

Various studies that have been carried out in the City of Juang Bireuen to see how far mobile phone consumers have switched to other brands, the findings or results of this study show a very significant impact on the switching of mobile phone brands, so that mobile phone manufacturers are charged with the desires that are of interest to consumers. The results carried out in the City of Juang Bireuen with respondents who had changed to another cellphone brand at least 1 time with 100 respondents the sample population showed that all averages were influenced by advertisements, price changes, and dissatisfaction in a cellphone brand, causing brand switching. The results of this study indicate that advertising has a positive and significant effect on the transfer of mobile phone brands. Likewise, price changes have a positive and significant effect on the transfer of mobile phone brands. Both with dissatisfaction have a positive effect on switching brands of mobile phones. Price changes strengthen the relationship between advertising and brand switching with interaction, meaning that price changes are purely an interaction variable. Likewise, price changes strengthen the relationship between dissatisfaction with brand switching and interaction. Based on the results of this study, there are several recommendations for consumers and mobile phone manufacturers, with increasing consumer interest in changing cellphone brands, it is an important task for manufacturers to be able to satisfy consumer desires

Assessing the Impact of the Mobile Manufacturing Sector on Indian Economy

Indian mobile phone manufacturing sector has performed tremendously during the last few years. Currently India is the second biggest mobile phone market in the world. The total number of mobile manufacturing units in India has increased to 268 in 2019 from just 2 in 2014. Together these units employ 6.7 lakh people. The mobile phone sale in India has shown a compounded annual growth rate of 6.66 percent and 6.54 percent, respectively, for volume and value between 2007 and 2018. During 2018 the average monthly sale of mobile phones was 10 million. There were around 75 brands and 3,400 models of mobile handsets in Indian market during 2019. India now accounts for 11 percent of global mobile production, which was only 3 percent in 2014. The mobile manufacturing sector has achieved this success in a very short span of time. Hence, it is important to examine the factors that led to the phenomenal success of the sector. Second, what is the impact of this success to the Indian economy? These are the two prime objectives the current article attempts to explore. The study finds Indian policy initiatives, digital India campaign among a few others have contributed immensely to the growth of the sector. Analyzing the factors like domestic sale and export of mobile handsets, FDI received and employment generated for the period between 2014 and 2019 the study finds a positive impact created by this sector to the Indian economy.

The Service Strategy and Influencing Factors of Online Recycling of Used Mobile Phones

Currently, many online platforms participate in the recycling of waste products, and the online recycling of used mobile phones is especially popular. We explore the service strategy for and the factors influencing customers’ willingness of online recycling (CWOR) of used mobile phones. We develop a game model of a reverse supply chain comprising a mobile phone manufacturer (MPM) and an online recycling platform (ORP) to analytically examine the influencing factors of CWOR. We show that the MPM’s profit is mainly affected by CWOR and the ORP’s offered recycling service. The impacts of customers’ preferences of the recycling price and recycling service on the MPM’s profit depend on the service cost coefficient. The ORP’s profit is independent of its service cost and customers’ preference of the recycling service. However, the impact of the recycling commission is restricted by customers’ preference of the recycling price. We also use structural equation modelling to empirically show that recycling service and environmental consciousness positively affect CWOR, and environmental protection publicity enhances environmental consciousness. In addition, customers’ age and income moderate the recycling service–CWOR link. Our findings reveal that improving the recycling service can directly and indirectly promote the recycling of used mobile phones. These findings provide guidance to the government and businesses related to used mobile phone recycling.

Low-Cost Ultrasonic Range Improvements for an Assistive Device.

To achieve optimal mobility, visually impaired people have to deal with obstacle detection and avoidance challenges. Aside from the broadly adopted white cane, electronic aids have been developed. However, available electronic devices are not extensively used due to their complexity and price. As an effort to improve the existing ones, this work presents the design of a low-cost aid for blind people. A standard low-cost HC-SRF04 ultrasonic range is modified by adding phase modulation in the ultrasonic pulses, allowing it to detect the origin of emission, thus discriminating if the echo pulses come from the same device and avoiding false echoes due to interference from other sources. This improves accuracy and security in areas where different ultrasonic sensors are working simultaneously. The final device, based on users and trainers feedback for the design, works with the user’s own mobile phone, easing utilization and lowering manufacturing costs. The device was tested with a set of twenty blind persons carrying out a travel experiment and satisfaction survey. The main results showed a change in total involuntary contacts with unknown obstacles and high user satisfaction. Hence, we conclude that the device can fill a gap in the mobility aids and reduce feelings of insecurity amongst the blind.

A mixed-method approach for modelling customer-centric mobile phone reverse logistics: application of social media data

PurposeRecently, reverse logistics (RL) has become more prominent due to growing environmental concerns, social responsibility, competitive advantage and high efficiency by customers because of the expansion of product selection and shorter product life cycle. However, effective implementation of RL results in some direct advantages, the most important of which is winning customer satisfaction that is vital to a firm’s success. Therefore, paying attention to customer feedback in supply chain and logistics processes has recently increased so that manufacturers have decided to transform their RL into customer-centric RL. Hence, this paper aims to identify the features of a mobile phone which affect consumer purchasing behaviour and to analyse the interrelationship among them to develop a framework for customer-centric RL. These features are studied based on website analysis of several mobile phone manufacturers. The special focus of this paper is on social media data (Twitter) in an attempt to help the decision-making process in RL through a big data analysis approach.Design/methodology/approachA portfolio of mobile phone features that affect consumer’s mobile phone purchasing decisions has been taken from website analysis by several mobile phone manufacturers to achieve this objective. Then, interrelationships between the identified features have been established by using big data supplemented with interpretive structural modelling (ISM). Apart from that, cross-impact matrix multiplication, applied to classification analysis, was carried out to graphically represent these features based on their driving power and dependence.FindingsDuring the study, it has been observed from the ISM that the chip (F5) is the most significant feature that affects customer’s buying behaviour; therefore, mobile phone manufacturers realize that this is to be addressed first.Originality/valueThe focus of this paper is on social media data (Twitter) so that experts can understand the interaction between mobile phone features that affect consumer’s decisions on mobile phone purchasing by using the results.

Anti‐counterfeiting strategy unfolded: A closer look to the case of a large multinational manufacturer

AbstractResearch SummaryWe examine in detail how one large mobile phone manufacturer develops its anti‐counterfeit strategy and seizes counterfeit products on the market. We couple qualitative data (observations from 150 counterfeit sales points worldwide, two focus groups, a survey with 151 respondents, interviews with 90 informants) with econometric analysis of 3,333 fights the focal firm undertook against more than 2,000 counterfeiters in 75 countries over 6 years (2006–2011). We focus on firm's seizure of counterfeit products when consumers' safety is at risk. As the firm is more sensitive to product safety than counterfeiters, we found that the firm generally performs larger seizures when unsafe products are involved, but this is less true in the firm's main market, likely because higher profitability offers higher incentives to counterfeiters.Managerial SummaryIn companies' fight against counterfeiters, product safety plays a pivotal role. We suggest that companies have a particularly high incentive to seize counterfeit products when the product carries potential safety risks, because the occurrence of safety issues seriously harms its reputation. This research explores the anti‐counterfeit strategy undertaken by a large manufacturer operating in the market of mobile phones and in the market of ancillary products (e.g., batteries and chargers). Results show that larger seizures occur in the ancillary rather than in the mobile phone market because while authentic companies have high incentives to seize mobile phone and accessories, as both involve safety risks, counterfeiters have a greater incentive in the main market and thus put less effort in ancillary markets.

Exploring engagement among mobile app developers – Insights from mining big data in user generated content

PurposeThe Web 3.0 has been hugely enabled by smartphones and new generation mobile applications. With the growing adoption of smartphones, the use of mobile applications has grown exponentially and so has the development of mobile applications. This study is an attempt to understand the issues and challenges faced in the mobile applications domain using discussions made on Twitter based on mining of user generated content.Design/methodology/approachThe study uses 89,908 unique tweets to understand the nature of the discussions. These tweets are analyzed using descriptive, content and network analysis. Further using transaction cost economics, the findings are reviewed to develop practice insights about the ecosystem.FindingsFindings indicate that the discussions are mostly skewed toward a positive polarity and positive user experiences. The tweeters are predominantly application developers who are interacting more with marketers and less with individual users.Research limitations/implicationsMost of these applications are for individual use (B2C) and not for enterprise usage. There are very few individual users who contribute to these discussions. The predominant users are application reviewers or bloggers of review websites who use the recently developed applications and discuss their thoughts on the same.Practical implicationsThe results may be useful in varied domains which are planning to expand their reach to a larger audience using mobile applications and for marketers who primarily focus on promotional content.Social implicationsThe domain of mobile applications on social media is still restricted to promotions and digital marketing and may solely be used for the purpose of link building by application developers. As such, the discussions could provide inputs towards mobile phone manufacturers and ecosystem providers on what are the real issues these communities are facing while developing these applications.Originality/valueThe study uses mixed research methodology for mining experiences in the domain of mobile application developers using social media analytics and transaction cost economics. The discussion on the findings provides inputs for policy-making and possible intervention areas.

PowerPrint: Identifying Smartphones through Power Consumption of the Battery

Device fingerprinting technologies are widely employed in smartphones. However, the features used in existing schemes may bring the privacy disclosure problems because of their fixed and invariable nature (such as IMEI and OS version), or the draconian of their experimental conditions may lead to a large reduction in practicality. Finding a new, secure, and effective smartphone fingerprint is, however, a surprisingly challenging task due to the restrictions on technology and mobile phone manufacturers. To tackle this challenge, we propose a battery-based fingerprinting method, named PowerPrint, which captures the feature of power consumption rather than invariable information of the battery. Furthermore, power consumption information can be easily obtained without strict conditions. We design an unsupervised learning-based algorithm to fingerprint the battery, which is stimulated with different power consumption of tasks to improve the performance. We use 15 smartphones to evaluate the performance of PowerPrint in both laboratory and public conditions. The experimental results indicate that battery fingerprint can be efficiently used to identify smartphones with low overhead. At the same time, it will not bring privacy problems, since the power consumption information is changing in real time.

Preferred skin reproduction centres for different skin groups

Producing preferred skin colours is vital for the digital images on mobile phone manufacturers. Previous studies investigated the skin colours only in chromatic plane excluding lightness. A psychophysical experiment was conducted to determine preferred skin colour centres for different skin colour types on mobile displays in a darkened room. Ten facial images were selected for the experiment to cover different skin colour types (Caucasian, Oriental, South Asian and African). A set of 49 predetermined colour centres uniformly sampled within the skin colour ellipsoid in CIELAB colour space was used to morph skin colours of test images. Thirty observers from each of the 3 ethnic groups (Caucasian, Oriental and South Asian) participated in the experiment. The preferred skin colour centre and region in the form of ellipsoid for each skin group were reported. It was found that the preferred colour centres from different skin colour types were very similar except their lightness as expected, and were also quite similar between the observers from different ethnic groups.

Towards reimagining the ‘digital divide’: impediments and circumnavigation practices in the appropriation of the mobile phone by African journalists

ABSTRACT The rapid proliferation of the mobile phone in Africa has often been celebrated in deterministic ways that blindly eschew the stark and intricate realities associated with the challenges of the ‘digital divide’. Equally, very little attention has been paid to the sophisticated ways in which citizens (in association with mobile phone operators and manufacturers) negotiate their way around these challenges. Against this backdrop, this essay draws on interviews conducted between 2008 and 2016 to explore the experiences of African journalists in their deployment of the mobile phone as a journalistic and everyday communication platform. It specifically examines the localised challenges faced and the strategies employed to circumnavigate them. The findings show that, to remain connected, journalists as both professionals and citizens, generally deploy tactics hinged on their individual and collective agency as well as the creative innovations of mobile phone operators and manufacturers. Collectively, these strategies, as the paper argues, present an opportunity to reimagine the notion of the ‘digital divide’ as a multifaceted, inherently contextual experience embedded in the interplay between social actors, their immediate context of ‘practice’ and the wider social milieu.

Purchasing Intention: A Research on Mobile Phone Usage by Young Adults

The main aim of study is to identify the factors that affect the purchasing intention of young adults. The reference group is an important factor in determining the underlying causes of young adults' purchasing intentions. However, the literature states that young adults prefer to buy brands they trust in order to eliminate the risks that may arise when buying products they may not know. Moving from this perspective, the study proposes a conceptual model that including structural relationships between brand trust, reference group, and purchasing intention. The study aims to contribute to the literature by discussing the moderator role of brand trust in this structure. A series of hypotheses are tested via a survey completed by 749 young people between the ages of 20 and 30 living in Istanbul, Turkey. The data were analyzed with IBM SPSS-23 and AMOS-18 program. In addition to descriptive, reliability, and factor (exploratory and confirmatory) analysis, hierarchical regression analysis was performed to test the research hypotheses. The results show that the reference group positively influences the purchasing intention, and brand trust plays a moderating role in this relationship. The findings are discussed and some practical suggestions are made for mobile phone manufacturers.

A new approach to performance measurement using standards: a case of translating strategy to operations

By convention, performance measurement from the business perspective is executed using the accounting standard costing and variance analysis doctrine. However, this practice is hardly theoretical, as it does not measure performance per se; what it is measuring is simply the actual activities and their pre-determined standards. According to theory and good practice, performance measurement is concerned with how strategy is translated into work via the different organizational structures and initiatives down to operations, using appropriate methods and procedures, and typically, the steps consist of specifying of objectives (goals), cascading them down the hierarchy, using standards in measuring progress (or deviation from goals), and rewarding performance. That is, strategy translation is a practical endeavor just like any OM activities. Since it is apparent that there is no conceptually established standard on performance measurement from the business perspective, we develop a performance measurement standard system (PMStd) based on the well-tested Classical Test Theory (CTT) as used by many non-business practitioners. Using a case study methodology, the PMStd is implemented in an emerging Chinese mobile phone manufacturer, and the results suggest that vital performance information on operations can be pinpointed and analyzed for actions to be taken to remedy weaknesses in order to improve performance.

The Theory of Reasoned Action Applied to Green Smartphones: Moderating Effect of Government Subsidies

Smartphones have become indispensable for human beings today. However, with mobile phone manufacturers updating existing models or launching new models every year, consumers tend to keep replacing their phones with the latest versions, resulting in an excessive waste of resources. These days, most governments worldwide emphasize energy conservation and carbon reduction. If pre-owned smartphones are refurbished or repaired, the excessive waste of resources can be reduced. Such recycling can positively enhance corporate image, while ensuring that consumer needs are met. Thus, to explore consumers’ willingness to purchase such “green” smartphones, this study uses the theory of reasoned action (TRA) to explore consumers’ purchase intentions and understand how brand equity, green marketing, as well as consumer’s green awareness and attitude influence this intention. This research also investigates the role of government subsidies as a moderator affecting consumers’ willingness to purchase green smartphones. The results indicate that, in general, consumers are willing to purchase green smartphones, the direct effect of brand equity on purchase intention is significant, and government subsidies have significant moderating effects. Therefore, it is recommended that the government cooperate with enterprises. The cooperation can be aimed at promoting green products as well as subsidizing consumers, to increase their willingness to purchase green smartphones.