Web servers that generate dynamic content are widely used in the development of Internet applications. With the Internet highly connected to people’s lifestyles, the service requirements of Internet applications have increased significantly. This increasing trend intensifies the need to improve server performance in dynamic content generation. In this thesis, we describe the opportunity to improve server performance by co-locating the web server and the application server on the same machine. We identify related work and discuss their respective advantages and deficiencies. We then introduce and explain our technique that passes the client socket’s file descriptor from the web server process to the application server. This allows the application server to reply to the client directly, reducing the amount of data copied and improving server performance. Experiments were designed to evaluate the performance of this technique and provide a detailed analysis of processor time and data copying during response delivery. A performance comparison against alternative approaches has been performed. We analyze the results to understand factors in data copying efficiency and determine that cache misses are an important factor in server performance. There are four major contributions in this thesis. First, we show that in multiprocessor environments, co-locating web servers and application servers can take advantage of faster communication. Second, we introduce a new technique that reduces the amount of data copied by two-thirds. This technique requires no modifications to the application server code (other existing techniques do), and it is also applicable in a variety of systems, allowing easy adoption in production environments. Third, we provide a performance comparison against other approaches and raise questions regarding data copying efficiency. Our technique attains an average peak throughput of 1.27 times the FastCGI with Unix domain sockets in both uniprocessor and multiprocessor environments. Finally, our analysis on the effect of cache misses on server performance provides valuable insights into why these benefits are obtained.

The rise of mobile phones as the number one leading personal communication device make mobile phones very attractive for marketers, as they are always on, always with the consumer and always connected. Smartphones has the ability to update their location (thus the location of the consumer) by themselves. Through this an automatic location-dependent advertisement, triggered by the location of the mobile device, may be sent to any customer in a predetermined area. However, a current problem is how to not misuse this opportunity. For example, even though a consumer is in the nearby area of a store it does not mean that they are interested in receiving an offer. Consumers are also very keen on feeling in control of the access to their personal information. The purpose of this bachelor thesis is thus to investigate what attributes a location-based application may have to increase customer usage by enhancing, facilitating and developing the customers shopping behaviour. Theories used as a basis for investigation are marketing strategy, marketing innovation, direct marketing, mobile marketing (location-based marketing and permission-based marketing), consumer behaviour (customer value, attitudes and monetary- and non-monetary promotion). A deductive, qualitative research approach was chosen, semi-structured interviews and focus groups were conducted among students at the Linnaeus University in Växjö. The interviews regarded application attributes; the results obtained were used as a base for the focus group studies. In the analysis, the findings from the focus groups linked with theory outlined the attributes and how such an application should be designed. The most important categories are customisation and value, followed in descending order by functional, external, registration and privacy. Also concluded is how the customers shopping experience may be enhanced, facilitated and developed on the basis of these attributes. In the conclusion similarities and differences between the two focus groups were discussed and theoretical and managerial implications were outlined.

The purpose of this thesis is to present and describe which criteria, according to the systemfamily Configuration Management, should be met when developing a CM-tool to handlemigration data.ACT is a tool developed by Microsoft to gather information about, analyze, test and mitigateapplications in a network when migrating the IT-infrastructure of an organization to a newoperating system. The organization that is being studied wants to present the data about theanalyzed applications in such a way, that a customer can choose what to mitigate and migrate.The goal is therefore to develop a prototype (CM-tool) that will present this data.The study has shown that ACT lacks certain requirements stated by the organization when itcomes to presentation. But when it comes to the rest of the functions, ACT performs as expected.The investigation resulted in specifications and technical solution for the new CM-tool. CMcriteriafor migration data was put forth and parts of the prototype were also developed.

<p>Wireless and mobile systems play an increasingly important role in our lives. Fueled by an array of innovative services and applications, mobile data traffic is surging rapidly. Traditionally, wireless traffic growth is met by acquiring new spectrum. However, wireless spectrum demand is soon going to surpass it's availability. Thus, there is an urgent need for major innovations in wireless network architecture, so that our spectrum utilization can achieve its full potential. Motivated by this problem, we explore an alternative design of physical layer aware wireless systems.</p><p>Typical approaches towards improving wireless performance is confined within the physical (PHY) or link layers of the networking stack, providing only partial so- lutions. In this thesis, we advocate to consider the entire network architecture holis- tically. We show how rich PHY layer information can be utilized to address existing challenges in wireless networking - contention resolution, rate control, interference management, etc. We design, implement, and experimentally evaluate protocols to understand network-wide implications of PHY-aware systems. We also pursue the observation that PHY layer not only encode bits but also contain rich information about the ambience, and hence can be viewed as a sensor. This sensing informa- tion can be further coupled with other phone sensors, thereby benefitting pervasive mobile services and applications. We demonstrate how this synergy can contribute towards designing precise indoor localization systems, an important building block for next generation mobile applications.</p> / Dissertation

Peoples daily lives and experiences often contain memories and information that they may want to recall again at a later time. Human memory, however, has its limitations and many times it alone may not be sufficient. People sometimes have difficulty recalling salient information and can forget important details over time. To complement what they can remember naturally, people must expend much time and manual effort to record desired content from their lives for future retrieval. Unfortunately, manual methods for capturing information are far from ideal. Over the years, ubiquitous computing researchers have constructed devices and applications to support the automated capture of live experiences and access to those records. At Georgia Tech, we have also investigated the benefits of automated capture and access in over half a dozen projects since 1995. As we encountered challenges in developing these systems, we began to understand how the difficulty of building capture and access systems can prevent exploration of the hard issues intertwined with understanding how capture impacts our everyday lives. These challenges illustrate the need for support structures in building this class of ubiquitous computing systems. This dissertation presents a set of abstractions for a conceptual framework and a focused design process that encourages designers to decompose the design of capture and access applications into a set of concerns that will be easier to develop and to manage. In addition, an implementation of the framework called the INCA Toolkit is discussed, along with a number of capture and access applications that have been built with it. These applications illustrate how the toolkit is used in practice and supports explorations of the capture and access design space.

In recent years, due to the popularity of smart phone, the mobile application store are loved by consumers, making an increasing number of about 40 mobile application stores around the world. Mobile applications store offers a wide range of applications, software programs, content and services, such as games, tools, music, entertainment, books, etc., allowing consumers to use free or paid downloads. A variety of choices meets all aspects of consumer demand that changes the original value provided by phone service. However, it is doubly difficult to make one software standing out from the number of the many applications and thus increasing the amount downloaded made by consumers. Even if the store offers different kinds of marketing methods to assist the software increasing exposure opportunities, but still not enough. The goal of this study is going to improve the visibility of the software. After comparing the various media channels, finding the appropriate promotional channel for mobile applications is social media. Then by two cases analyzed understands the marketing effect through social media. By the aforementioned, this study sorts out the appropriate exposure development model of mobile applications software. First, software developers choose the appropriate software to create pages by being promoted software attributes and the media habits of target segments. Second, building blog provides consumers with more complete software and activities information to make up for other types of social media which is not entirely on message passing. Third, the software developer integrates the related sites, including blog, social media, or website to help the update information to be obtained on all relevant sites.

With the smart handheld devices and the rapid development of network applications, data exchange between devices as the first problem. There are many ways the information can be transmitted from one end to the other end, but which one is the best way? This paper examines several common data package method, compare their features, advantages and disadvantages, and to test the effectiveness of the data package, the size of data packaged, the package needed time. In order to prove the practicality of packages, designed a "file synchronization system," using Protocol Buffer as data exchange formats, implementing the Android system.

¡@In pace with the digital service development and technology expansion, the traditional media environment is in a transformation period. Along with the innovation of mobile reading, there is coming an emerging trend, digital mobile reading in the entire world. Therefore, it is clear that print media is toward to the digital convergence trend. ¡@ ¡@It is iPad, first launch tablet in 2011. Apr., contributed to the highest tablet market share among all for Apple Inc. In the future, tablet is going to be a kind of innovative and leading media tools. For that reason, there are plenty of traditional print media companies plan to launch iPad applications. Then, print media not only becomes the potential novel media technology but also leads the trend of print media transformation. However, print media application at present is still in the primary stage. It is still waiting for market test that print media application could be the main stream or not, in the coming future. ¡@¡@This research, on the basis of Rogers¡¦ ¡§Diffusion of Innovations,¡¨ investigates and analyzes the print media applications. Also, setting United Daily News iPad Application as an example, it is focus on the relationship among the features of the early adopters, demographic variables, perceived characteristics of innovations, lifestyle and the willing of print media applications intension. Through the collaboration between academy and industry, UDN. COM, it is 396 effective samples after collecting that distributes to United Daily News iPad Application and UDN. COM. (digital information area) ¡@¡@The result shows that the profiles of the early adopters using United Daily News iPad Application are middle-aged males, well-educated and high income. It is demographic variables, perceived characteristics of innovations and media usage behavior that significantly impact on the willing of print media applications intension. Further, the lifestyle prototype, much closer to sophisticated and fashionable, life expansionists and preference for foreign products, owns superior adoption intensions to United Daily News iPad Application.

Over the past few years, a growing attention has been paid to the publish/subscribe (pub/sub) communication paradigm which has become the best model for disseminating information (also called events) through distributed systems on wide-area networks. There are many ways to implement the publish/subscribe system architecture. A common way is publishers and subscribers interact through one or more agents called broker. Broker has to store and management subscriptions, match messages, and efficiently delivery messages to subscribers. It also provides reliability and fault tolerant controlling. Obviously, broker is the most important part of the publish/subscribe system. It is usually required to use a lot of resources such as CPU and memory. In this paper, our publish/subscribe service which implemented by ZeroMQ API could service 10,000 subscribers only cost 3% CPU and 5% memory usage. It is a high performance and low costs publish/subscribe service.

This study was conducted on two rangeland sites in south Texas with large populations of huisache (Acacia farnesiana (L.) Willd.); the Bush Ranch in Goliad County, and the Hitchcock Ranch in Bee County. The purpose of the study was to evaluate the effect of three herbicide treatments and three seasons of application on 1) apparent mortality of huisache, 2) huisache canopy cover, 3) huisache stem density, and 4) herbaceous ground cover. Herbicide treatments included aminocyclopyrachlor alone at a rate of 0.315 kg a.i. ha-1, aminocyclopyrachlor + triclopyr at a rate of 0.210 kg a.i. ha-1 + 0.420 kg a.e. ha-1, and triclopyr + picloram at a rate of 0.560 kg a.e. ha-1 + 0.560 kg a.e. ha-1. Herbicide treatments were applied over 3 x 30 m plots containing previously mowed huisache in May, July, and October of 2010 with ground-broadcast equipment at a rate of 140 L ha-1. Randomly selected huisache individuals and herbaceous ground cover at randomly selected points were monitored for the duration of the study. Statistical analyses of huisache mortality, canopy area, and stem densities revealed that at both sites one year after treatment, huisache mortality across the three seasons of application was consistently higher in plots treated with aminocyclopyrachlor + triclopyr (50 to 99%) versus those treated with aminocyclopyrachlor alone (16 to 78%) or triclopyr + picloram (4 to 70%). This mixture also provided the greatest reductions in huisache canopy area (60 to 99% reduction) and stem density (61 to 99% reduction). Also at both sites, spring applications consistently provided the greatest huisache control and canopy and stem reductions. Herbicide treatment and season of application had little effect on post-treatment herbaceous ground cover, likely due to extreme drought conditions in 2011. Of the possible combinations of seasons of application and herbicide treatments, the application in the spring of aminocyclopyrachlor plus triclopyr provided the most desirable results in terms of huisache mortality, canopy reduction, and stem density reduction. However, for sites invaded by huisache that are located near to potentially susceptible crops, the application of aminocyclopyrachlor plus triclopyr or aminocyclopyrachlor alone in the fall after the harvest of those crops may be more appropriate in order to avoid non-target injury while still providing acceptable huisache control.