Chat and Shared Drawing Board for Mobile Phones with Bluetooth

Tato práce se zabývá analýzou, návrhem a implementací aplikace pro mobilní zařízení, která umožní dvěma uživatelům komunikovat. Jako příklad by mohla sloužit situace, kdy se lidé potřebují dohodnout, ale není možné rušit okolí rozhovorem. Komunikace probíhá textově nebo graficky. Program je napsán v jazyce Java 2 Micro Edition a ke spojení zařízení využívá rozhraní Bluetooth.This work deals with analysis, design and implementation of application for mobile devices which allows two users to communicate. As an examle would be a situation where people wants to comunicate but it is not alowed to disturb the surrounding with conversation. The comunication is with text messages or graphic primitives. The program is written in Java 2 Micro Edition and a Bluetooth interface is used for a connection between devices.

The Palestinian in Diaspora

There were several things I was interested in learning. First, I wanted to examine individual Palestinian views to compare them with what the Palestinian leadership states in representing them. Also, I wanted to discover how the Palestinians outside of the Occupied Territories feel about a Palestinian nation its leadership, and the leadership's goals. Second, I wanted to learn about the socialization and politicalization process of Palestinians because most Palestinians under thirty living in Diaspora have never seen Palestine let alone lived there. I was interested in how these young Palestinians have come to relate so strongly to a land they have never seen and how Palestinian history is passed on to them. Third, I want to examine two statements I have repeatedly seen in scholarly wrks on Palestinians: 1) That education is extremely important to the Palestinians because it helps them move up the social ladder; and 2) That Palestiniane as a nation did not exist until the expulsion in 1948 and that this expulsion created the Palestinian nation (nation as different from a state which requires territory). Finally, I wanted to find out how Palestinians view themselves in this Diaspora

The Effects of Classroom Type on Anxiety, Motivation, Interaction, and Vocabulary Development in a Novice Level TBLT Course for Young Learners

Relatively little research has considered how tasks are performed and experienced by students in different types of classrooms. Research shows that innovative classroom designs can lead to higher levels of cognitive engagement, connections between form and meaning, and more diverse forms of input (Schmidt, 1990; Svalberg, 2012) and are particulary beneficial for young learners (Nunan 2013). While significant research has explored TBLT, very little has looked at its effectiveness with young learners, particularly in the foreign language classroom. (Butler & Zeng 2014, Ellis 2020). The present quasi experimental mixed methods study examines the effects of the classroom setting on interaction processes and affective factors within the Spanish classroom with vocabulary as the target linguistic feature. Classroom comparisons are made between traditional and Montessori designs. Data was collected with a group of fifteen 4th and 5th grade novice language learners split into two TBLT Spanish classes during a one-month summer enrichment program. Each group of learners attended equal class time in a traditional classroom and in an age-appropriate Montessori classroom. Data on motivation, attitude, and anxiety was collected through uptake sheets given to learners at the end of the pre-task and the main task. Vocabulary data was collected through pre, post, and weekly vocabulary tests. Interaction data was collected through recording of pair task work, then transcribed and coded for total turns, off task turns, and vocabulary usage. Overall, the Montessori classroom design exceeded the traditional classroom in affective factors and vocabulary acquisition following previous research by Gurzinsky-Weiss et al. (2015) on innovative classroom design. Opinion gap tasks were most effective in terms of affective factors for young learners as well as rate of learning, while information gap tasks promoted the highest levels of target language usage. Findings of this study allow for deeper understanding of how TBLT can be more effective for young learners in terms of classroom type and task type to increase interaction and vocabulary acquisition as well as promote positive effects on affective factors

Experimental investigations of factors controlling the spread of DNAPL contamination in undisturbed columns of fractured saprolite

A series of laboratory experiments were conducted to further investigate the physical and chemical factors influencing the spread of TCE (trichloroethylene) contamination m fractured saprolite formed from sedimentary rock. The experiments involve simulation of a spill by injection of dyed immiscible phase TCE into two undisturbed columns of fractured saprolite, allowing a period of time for dissolution and diffusion of the TCE, and then dismantling them to map the resulting distribution of contamination. The use of dyed TCE allowed for the identification of preferential flow paths, which were associated with fractures and macropores in the two dominant saprolite lithology types, namely clay-rich limestone saprolite and blocky siltstone/shale saprolite, that comprise the columns. Despite evidence of discrete and erratic flow paths, TCE contamination was found throughout almost all of each column, with only small areas below detection limits. Based on observations and supported by calculations, the variable saprolite lithology and the processes of dissolution and diffusion are responsible for rapidly spreading the contamination. Comparisons were made of fracture aperture and porosity values derived from the cubic law and bulk hydraulic conductivity with DNAPL (dense non-aqueous phase liquid) entry pressure apertures and estimates of residual DNAPL volumes. These comparisons indicate that the cubic law can underestimate fracture aperture and may underestimate residual DNAPL volumes

Ethnic variations in relationships

Previous research on differences between African-American and Caucasian families has indicated extensive variation between ethnic groups, which often has been interpreted as suggesting deficits among African-American, as compared to Caucasian relationship patterns (e.g., Moynihan, 1965). Much of this research has been at the sociological level of analysis which focuses on structural and quantitative characteristics (e.g., number of single-parent families, number of friends, etc.). Although useful, such an emphasis tends to obscure more qualitative and psychological characteristics of relationships (e.g., degree of satisfaction, meaning of relationship, attachment, etc.), which are emphasized at the psychological level of analysis. Moreover, much of the recent research on relationships may be interpreted as supporting the idea that the qualitative characteristics of relationships are more strongly related to important relationship outcomes than are the quantitative measures (e.g., Jones and Perlman, 1987; Carver and Jones, 1992). As a consequence, the present inquiry examined the characteristics of family and other relationships among 73 African-American and 185 Caucasian college students using measures of psychological characteristics as well as broader sociological categories. Specifically, comparisons were made in regard to loneliness, family satisfaction, parent and peer orientation, as well as quantitative aspects such as social support characteristics. Results replicated and further confirmed previous reports comparing African-American and Caucasian respondents on relationship patterns when viewed from the perspective of broader sociological characteristics. By contrast, the differences between these two groups in their degree of satisfaction with and attachment to various relational partners were not reliable

Normalization of Unstructured Log Data into Streams of Structured Event Objects

Monitoring plays a crucial role in the operation of any sizeable distributed IT infrastructure. Whether it is a university network or cloud datacenter, monitoring information is continuously used in a wide spectrum of ways ranging from mission-critical jobs, e.g. accounting or incident handling, to equally important development-related tasks, e.g. debugging or fault-detection. Whilst pursuing a novel vision of new-generation event-driven monitoring systems, we have identified that a particularly rich source of monitoring information, computer logs, is also one of the most problematic in terms of automated processing. Log data are predominantly generated in an ad-hoc manner using a variety of incompatible formats with the most important pieces of information, i.e. log messages, in the form of unstructured strings. This clashes with our long-term goal of designing a system enabling its users to transparently define real-time continuous queries over homogeneous streams of properly defined monitoring event objects with explicitly described structure. Our goal is to bridge this gap by normalizing the poorly structured log data into streams of structured event objects. The combined challenge of this goal is structuring the log data, whilst considering the high velocity with which they are generated in modern IT infrastructures. This paper summarizes the contributions of a dissertation thesis "Normalization of Unstructured Log Data into Streams of Structured Event Objects" dealing with the matter at hand in detail

Optimization of Cyber Defense Exercises Using Balanced Software Development Methodology

Cyber defense exercises (CDXs) represent an effective way to train cybersecurity experts. However, their development is lengthy and expensive. The reason lies in current practice where the CDX life cycle is not sufficiently mapped and formalized, and then exercises are developed ad-hoc. However, the CDX development shares many aspects with software development, especially with ERP systems. This paper presents a generic CDX development method that has been derived from existing CDX life cycles using the SPEM standard meta-model. The analysis of the method revealed bottlenecks in the CDX development process. Observations made from the analysis and discussed in the paper indicate that the organization of CDXs can be significantly optimized by applying a balanced mixed approach with agile preparation and plan-driven disciplined evaluation

Science Hybrid Orbiter and Lunar Relay (SCHOLR) Architecture and Design

Considered both a stepping-stone to deep space and a key to unlocking the mysteries of planetary formation, the Moon offers a unique opportunity for scientific study. Robotic precursor missions are being developed to improve technology and enable new approaches to exploration. Robots, lunar landers, and satellites play significant roles in advancing science and technologies, offering close range and in-situ observations. Science and exploration data gathered from these nodes and a lunar science satellite is intended to support future human expeditions and facilitate future utilization of lunar resources. To attain a global view of lunar science, the nodes will be distributed over the lunar surface, including locations on the far side of the Moon. Given that nodes on the lunar far side do not have direct line-of-sight for Earth communications, the planned presence of such nodes creates the need for a lunar communications relay satellite. Since the communications relay capability would only be required for a small portion of the satellite s orbit, it may be possible to include communication relay components on a science spacecraft. Furthermore, an integrated satellite has the potential to reduce lunar surface mission costs. A SCience Hybrid Orbiter and Lunar Relay (SCHOLR) is proposed to accomplish scientific goals while also supporting the communications needs of landers on the far side of the Moon. User needs and design drivers for the system were derived from the anticipated needs of future robotic and lander missions. Based on these drivers and user requirements, accommodations for communications payload aboard a science spacecraft were developed. A team of interns identified and compared possible SCHOLR architectures. The final SCHOLR architecture was analyzed in terms of orbiter lifetime, lunar surface coverage, size, mass, power, and communications data rates. This paper presents the driving requirements, operational concept, and architecture views for SCHOLR within a lunar surface nodal network. Orbital and bidirectional link analysis, between lunar nodes, orbiter, and Earth, as well as a conceptual design for the spacecraft are also presente

Secure and Efficient Blockchain Scheme for the Internet of Bikes

Blockchain has recently emerged as an auspicious technology for enabling vulnerable data to be exchanged anonymously and securely within Intelligent Transportation System (ITS). Furthermore, Blockchain can be used as an access control mechanism to present a decentralized solution to the distributed authentication problem in the Internet of Bikes (IoB). Although several Blockchain access control mechanisms have been proposed to address the security concerns in IoB, most of them are still vulnerable to some active attacks, especially the cloning attacks. Therefore, this paper proposes a new Trust-Based Access Control Blockchain System (TBACS) to address the cloning attack based on using a secure Trusted Digital Ticket (DGT). The simulations of our solution through the Hyperledger Fabric are showing relevant results in terms of communication overhead and the detection probability of cloning attacks