Miracle-dz/UniFAR-FTUs huggingface dataset:
Two-stage multiuser detection for asynchronous CDMA using DPSK signalling

In this paper, a two-stage multiuser detector for asynchronous code division multiple access (CDMA) using differential phase shift keying (DPSK) is proposed and analyzed. The detector operates using tentative bit decisions of the bilinear decorrelating detector to estimate the multiple access interference corrupting the desired signal. The two-stage detector subsequently subtracts the reconstructed interference from the received signal, and then forms final bit estimates using a bank of conventional differential phase shift keying (DPSK) detectors. Numerical examples indicate that the two-stage detector may offer a significant performance advantage over the bilinear decorrelator with little added complexity.
Millimeter-wave backscatter measurements in support of surface navigation applications

Millimeter-wave (MMW) radars and radiometers are emerging as reliable and low-cost systems in numerous commercial and military applications. MMW short-range radar systems have a unique advantage in surface navigation applications, such as military vehicle mobility in inclement conditions, aircraft landing guidance and automobile collision avoidance. MMW short-range systems provide acceptable angular resolutions, but are superior in performance compared to optical systems under conditions of rain, fog, or smoke. Their small size makes them particularly advantageous in space-limited systems. We present 95 GHz MMW grazing angle clutter data obtained from distributed surfaces. Sigma-zero values at grazing angles of 5.0 and 7.5 degrees were obtained from fresh snow and asphalt covered distributed surfaces. The probability distribution of the received clutter power is also discussed. A brief description of the MMW radar system and experimental setup is also included.
A Study on Participation of Korean University Students at LINC Applying the Expectancy Theory

본 연구는 Vroom의 기대이론을 적용하여 LINC 사업 참여 대학생의 동기부여적 요소를 규명하고, 실제 참여 행동 및 개인의 성과 개선에 미치는 영향을 실증적으로 검증하는 것을 목적으로 한다. 동기부여의 요소는 유의성, 수단성, 기대와 같이 세 가지 항목으로 구성하였으며, 대상의 인구통계학적 특성의 차이를 비교 검.
Cognitive and Socio-Emotional Interaction in Collaborative Learning: Exploring Fluctuations in Students’ Participation

ABSTRACT Collaborative learning involves fluctuations in how students participate in social interaction and how they engage in interactions that are cognitive (e.g., sharing knowledge, monitoring learning) and more socio-emotional (e.g., encouragement, positive appraisal) in nature. Few studies have investigated how participation in social interaction fluctuates in relation to these varying types of interaction. The aim of this process-oriented study was to explore how actively students participated in cognitive and socio-emotional interactions and what characterized the moments when participation changed during transitions between the types of interaction. The qualitative analysis focused on video-recorded collaborative learning of six groups of student teachers (N = 24). We found that socio-emotional interaction involved more active participation than cognitive interaction. Changes in participation during transitions between types of interaction were characterized by shifts between domain-focused and metacognitive activities. Implications for supporting and studying productive social interaction in collaborative learning are discussed.
Automatic Generation of Parasitic Constraints for PerformanceConstrained Physical Design of Analog Circuits

A new design methodology for the physical design of analog circuits is proposed. The methodology is based on the automatic generation of constraints on parasitics introduced during the layout phase from constraints on the functional performance of the circuit. In this novel performance-constrained approach, the parasitic constraints drive the layout tools to reduce the need for further layout iterations. Parasitic constraint generation involves 1) generation of a set of bounding constraints on the critical parasitics of a circuit to provide maximum flexibility to the layout tools while meeting the performance constraints; and 2) deriving a set of matching constraints on the parasitics from matched-node-pair and matched-branch-pair information in differential circuits. Constraint generator PARCAR is described and results presented for test circuits.
Status of Traditional Beekeeping and Various Threats to Bees in Climate Changing Scenario in District Ganderbal of Kashmir

Kashmir is home of diverse flora which is used by bees as their source of pollen and nectar. Its forests and different agroecosystem, apple orchards and forests contain diverse plant species that provide surplus nectar and pollen to foraging bees. The state is the major honey producer in India. Although thousands of tones of honey have been produced every year, the products obtained from the subsector have been observed to still low as compared to the potential of the state.
REACHING OUT WITH UNIVERSAL PARENTAL SUPPORT

Thorslund, Karin (2019). REACHING OUT WITH UNIVERSAL PARENTAL SUPPORT. Department of Psychology, University of Gothenburg, PO Box 500, SE-405 30 Gothenburg, Sweden. The overarching aim of this thesis was to explore the general interest in universal parental support, the circumstances under which this interest is stronger, and how universal support groups for parents of adolescents could be developed according to those parents’ perceived needs. Study I examined parents ́ interest in municipal parental support. The results showed that mothers were more interested than fathers in all forms of parental support except a webpage, and that frequent use of the Internet as a source of parenting information was associated with high interest in parental support. Study II explored interest in existing and possible universal parental support in parents of adolescents compared with parents of younger children. About 82% of the parents of adolescents interviewed considered universal parental support most important during the child’s adolescence. There was substantial interest, in most forms of support. Despite their interest, parents had limited awareness of available support. Study III explored the factors associated with interest in universal parental support and found it was linked to parents’ own anxious mood, lower perceived parental capacity, perception of their child as having psychiatric problems, perception of their adolescents’ openness about things, and perception of their adolescent’s overall difficulties in daily life due to psychiatric symptoms. Study IV explored what kind of support parents of adolescents’ request from universal parent support groups and what practical requirements would enable parents to participate. Parents could give each other emotional support and develop better parenting skills together. Reaching out with support universally requires that various information channels be utilized to reach out to all parents regardless of gender and social status, and various forms of support be offered. The Internet is an important but challenging information channel for reaching out to parents, especially fathers. Supports should be developed that are targeted to parents of adolescents, tailored to their needs, and well-advertised. Schools are important arenas for offering universal parental supports such as support groups moderated by trained professionals. Lighter support forms should be accompanied by more resource-demanding forms of support. to prevent increasing inequalities between parents with different social situations.
The Analysis of Teenagers’ Vlogging Preferences in Educational Research

Theories on media consumption show that online content influences users’ attitudes and behavior. We employed open-source instruments of data visualization in order to build a network of vloggers based on teenagers’ preferences. The constructed network displays communities of users based on the YouTube content they follow. Used together with traditional research techniques, the method constitutes an effective tool in identifying the profile of students found at risk of engaging in deviant behavior or of school dropout. Grounded in network science, the method also proposes ways of reducing the diffusion of problematic content inside networks and eventually of ameliorating the engagement in deviant behavior and of reducing school dropout.
Reasoning on Communication Between Agents in a Human-Robot Rescue Team

Humans and robots start to team up in rescue missions to overcome together the challenges arising in kinematics and locomotions by humans. In order to enhance the success of these heterogeneous teams, human operators should know how their robotic partners will behave under different conditions. In this paper we integrate the high-level plans of robots in a rescue team into the OPENEASE web application in order to reason about actions and behaviors of agents at different timepoints and different locations. By using already existing Prolog queries or the new ones that they create, people can ask questions such as why, how and when a robot has done a certain behavior. This kind of queries will be useful for operators to diagnose and to understand the behaviors of their partners. We show two different exemplary use cases in a human-robot team: In the first one, the robotic agent misinterprets the command and goes somewhere else. In the second one, it interprets the command correctly and is able to successfully reach the regionof-interest. By reasoning on these two cases, one can conclude which kind of commands can be misinterpreted by the robot.
Les pratiques managériales, clés de la maîtrise des effets de l’interculturalité sur les alliances stratégiques internationales

L’interculturalite ayant souvent ete assimilee dans la litterature a un obstacle a la reussite des alliances strategiques internationales, nombreuses sont les recherches a s’etre penchees sur ce phenomene. Si cet interet de la communaute academique a permis par la suite de relativiser ce postulat en devoilant, au contraire, les bienfaits de la diversite culturelle, rares sont les etudes qui ont porte explicitement sur les pratiques d’integration culturelle et sociale des acteurs et sur la regulation des retombees de cette diversite.A partir de ce constat, outre la mise en lumiere des effets benefiques et perturbateurs des dissemblances culturelles sur le fonctionnement et la performance des alliances transfrontalieres, nous etudierons dans cet article les pratiques cles du succes en matiere de management interculturel.Les entretiens semi-directifs que nous avons menes aupres de 22 allianceurs (managers d’alliances) et de 11 salaries tunisiens et francais operant dans 11 alliances franco-tunisiennes asymetriques stables revelent que l’audit culturel, la generalisation et l’acceleration du rapprochement interculturel (via la sensibilisation des parties prenantes a l’interculturalite, la formation interculturelle interne et/ou externe, la mise en place d’une organisation aplatie et la promotion de la parite au niveau de l’equipe manageriale et des equipes de travail) representent des pratiques cles d’une gestion reussie de la diversite culturelle au sein d’une alliance strategique entre entreprises de nationalites differentes.
Review of Typical Power Conservation Techniques in Wireless Sensor Network

the wide range of application, and yet exploring, wireless sensor network has attracted many researcher to design a remotely operated sensing device on such areas, where it is not possible for human to reach. However, in this process, one of the most troubleshooting issue in WSN becomes its power constraint as the nodes are backed up by battery that cannot be change or difficult to recharge in wireless environment. From past decade there has considerable amount of research work addressing towards the power consumption and depletion issues in WSN. Hence, this paper discusses some of the standard techniques that have evolved in the past with a claim of efficient power preservation techniques. The paper has also discussed some of the recent techniques identified that has the potentials of saving the energy depletion. Finally, the trade-offs towards the prior work done and current need is discussed in this paper.
Software Developer Experience: Case Studies in Lean-Agile and Open Source Environments

Human factors have been identified as having the largest impact on performance and quality in software development. While production methods and tools, such as development processes, methodologies, integrated development environments, and version control systems, play an important role in modern software development, the largest sources of variance and opportunities for improvement can be found in individual and group factors. The success of software development projects is highly dependent on cognitive, conative, affective, and social factors among individuals and groups. When success is considered to include not only fulfilment of schedules and profitability, but also employee well-being and public impact, particular attention must be paid to software developers and their experience of the software development activity. This thesis uses a mixed-methods research design, with case studies conducted in contemporary software development environments, to develop a theory of software developer experience. The theory explains what software developers experience as part of the development activity, how an experience arises, how the experience leads to changes in software artefacts and the development environment through behaviour, and how the social nature of software development mediates both the experience and outcomes. The theory can be used both to improve software development work environments and to design further scientific studies on developer experience.
JaSPEx: Speculative Parallelization on the Java Platform

Multicore processors, capable of running multiple hardware threads concurrently, are becoming common on servers, desktops, laptops, and even smaller systems. Unfortunately, most of the time these new machines are underutilized, as most current software is not written to take advantage of their multiprocessing capabilities. Also, with these new machines, more cores do not translate into more sequential performance, and existing sequential applications will not speed up by moving to a multicore. This work proposes to tackle this problem with the use of thread-level speculation based on a software transactional memory, to parallelize automatically sequential programs. The Java Speculative Parallel Executor (JaSPEx) system is described, which combines the modification of an application so that it can execute transactionally under the control of a software transactional memory (the transactification process), with the speculative parallel execution of the application, on top of an unmodified Java Virtual Machine. Both the transactification and the speculative execution are done automatically, without needing any changes to the original application or input from its programmer, for all existing sequential applications that execute on the Java Virtual Machine. I also address the difficulties inherent to the process of transactifying an existing program, and what is the relationship between the speculative execution of a program and the software transactional memory that it is using. I present early benchmark results with a proof-of-concept implementation of the JaSPEx system, that show promising results for the approach I propose.
The 2014 ACM international conference on Measurement and modeling of computer systems

It is our pleasure to welcome you to SIGMETRICS 2014. SIGMETRICS is the flagship conference of the ACM special interest group for the computer systems performance evaluation community. This year's conference continues the long-standing SIGMETRICS tradition to publish the highestquality research on the development and application of state-of-the-art, broadly applicable analytic, simulation, and measurement-based performance evaluation techniques. We are pleased to present a diverse set of papers in areas such as sensor, mobile and wireless networks, queuing and scheduling, msocial networks, memory technologies, large-scale measurement studies, system tracing and monitoring, data center resource provisioning and energy management. Our authors hail from 13 countries on 4 continents and represent both academia and industry. SIGMETRICS 2014 received 237 submissions, the second highest number since the founding of this SIG. Of these, we accepted 40 papers, the largest in the history of the conference, while still maintaining a highly competitive acceptance rate of 16.8%. During the review process, the Program Committee provided 4-6 reviews for each paper and made extensive use of HotCRP's Comment feature for online discussions. The Program Committee then met in person in a 1.5-day meeting on February 7-8, 2014, in Toronto, Canada, and selected 40 papers to be included as full papers in the technical program. In addition, 31 papers were invited as 2-page posters, and the authors of 30 of these papers accepted our invitation. As an experiment, we invited for the first time also all authors of full papers to present a poster version of their paper during one of the breaks at the conference to foster interaction between authors and attendees. We used Eddie Kohler's excellent HotCRP software to manage all stages of the review process, from submission to author notification.
Power control for CDMA macro-micro cellular system

The hierarchical cell structure is needed for different requirements: large cells guarantee continuous coverage, while small cells are necessary to achieve good spectrum efficiency and high capacity. In this paper, the CDMA system in macro/micro cell structure is investigated. We propose an adaptive scheme of controlling the cell size according to a time-varying traffic distribution in a macro/micro overlaid cell environment. This aims to bring the communications quality in both the macro-cell and micro-cell to a target quality level. Simulation results show that the proposed scheme effectively controls the time-varying traffic fluctuations and provides an enhanced performance.
1/f Noise and RTS(Random Telegraph Signals) and Read Errors in Nanoscale Memories

Noise signals can be equivalently represented in either the frequency domain or the time domain. The representation or modeling in the frequency domain gives the mean square noise current of a transistor as a function of frequency. The representation or modeling of the RTS or l/f noise of nanoscale devices that is easiest to understand is that done in the time domain. The capture and emission of a single electron in a nanoscale NMOS transistor will be equivalent to a change in threshold voltage. Modern devices are now small enough that we can see RTS noise signals associated with single electron trapping. This electron trapping is equivalent to the electron trapping on nanocrystals in nanoscale memories and can cause data errors.
Wavelength and polarization multiplexed optical vortex demultiplexer

Optical vortex beams with orbital angular momentum (OAM) have recently received considerable attention in high-speed optical communication due to their spatial orthogonality. For realizing undamaged demultiplexing, an all-dielectric multiplexed metasurface for demultiplexing wavelength-division multiplexing and polarization-division multiplexing OAM light was proposed. This OAM demultiplexer works in the near-infrared spectral region and the transmitted vortex beams carry original topological charges and phase distribution. It is worth mentioning that this demultiplexer is vastly different from previous demultiplexers, in that it not only eliminates the cumbersome process of converting vortex beams into Gaussian beams but also maintains the original property of the transmitted vortex beams. The presented demultiplexer has flexible and compact features, which are suitable for OAM communication systems. Also, the designed wavelength- and polarization-multiplexed metasurface expands the scope of metasurface compactness multifunctional photonics, which has applications in information security and anti-counterfeiting.
Interpretation of reasons for equal summer-time sunny and shady slope temperatures in an east-west oriented high-latitude valley, NW Russia

This paper seeks for an answer to a question why a north-facing shady slope may provide equal or even higher daily temperatures than a south-facing sunny slope. Findings are based on data collected in 1998-2000 with the aid of data loggers (type Minilog-TX) which were located on opposite sides of an over 200 metres deep and three kilometres wide, east-west oriented Lake Paanajarvi valley. Due to the high-latitude position (66o15’) near the Arctic Circle sun is to be seen during the summer solstice day also at night-time on tops of the highest hills, while during the midwinter sunshine does not reach the valley bottom for many weeks. Comparison of thermal data with the official daily weather records made at the valley bottom showed that the sun warmed up the north-facing shady slope more than the south-facing sunny slope from evening till morning on the cloudless days of June and July. Winds of the same days were mostly orientated along the valley axis. Fair-weather conditions coinciding with along-valley winds evoked an idea of a helical flow. Summing up, the prime mover for equal daily valley temperatures is the midsummer sun which, firstly, keeps the shady side warmer than the sunny side at night time and, secondly, warms up the sunny slope at daytime. The latter event results in a local low pressure, rising air masses and compensating air flow across the valley bottom, with a concurrent wind along the valley due to the difference in warming capacities between the uplands and the lowlands. The combined action of these two winds generates a spiral-like helical flow which adds to the equality of temperatures in that it moves the daytime warmth of the sunny slope to the opposite side of the valley.
정상인에서 양손 및 한손 움직임 시 근활성도 비교

Purpose : The aim of this study was to compare the muscle activities of thumb and wrist during unimanual, bimanual symmetric and bimanual reciprocal movements using surface electromyography. Method : Thirty-six participants were involved in this study. Two blocks were used to perform unimanual, bimanual symmetric and bimanual reciprocal movements of thumb and wrist. Muscle activities in the flexor pollicis brevis, abductor pollicis brevis, extensor carpi radialis and flexor carpi radialis were measured using an surface EMG system. Result : For the flexor pollicis brevis and abductor pollicis brevis, significant difference in the muscle activity were found among the unimanual, bimanual symmetric and bimanual reciprocal movement. For the extensor carpi radialis and flexor carpi radialis, the unimanual movement significantly different from the bimanual symmetric and reciprocal movements. Conclusion : Both the thumb and wrist, bimanual symmetric and reciprocal movements were more efficient than the unimanual movement. Moreover, with regard to the thumb, the bimanual reciprocal movement was more efficient than the bimanual symmetric movement.