Miracle-dz/UniFAR-FTUs huggingface dataset:
Cheirality Invariants

It is known that a set of points in 3 dimensions is determined up to projectivity from two views with uncalibrated cameras. It is shown in this paper that this result may be improved by distinguishing between points in front of and behind the camera. Any point that lies in an image must lie in front of the camera producing that image. Using this idea, it is shown that the scene is determined from two views up to a more restricted class of mappings known as good projectivities, which are precisely those projectivities that preserve the convex hull of an object of interest. An invariant of good projectivity known as the cheirality invariant of a set of points is defined and it is shown how the cheirality invariant may be computed using two uncalibrated views. As demonstrated theoretically and by experiment the cheirality invariant may distinguish between sets of points that are projectively equivalent (but not via a good projectivity). These results lead to necessary and sufficient conditions for a set of corresponding pixels in two images to be realizable as the images of a set of points in 3 dimensions. Using similar methods, a necessary and sufficient condition is given for the the orientation of a set of points to be determined by two views. If the perspective centres are not separated from the point set by a plane, then the orientation of the set of points is determined from two views. Good projectivities and the cheirality invariant are also defined for point sets in a plane, which allows these new methods to be applied to images of planar objects.
Vicarious Trauma Among Therapists Working with Sexual Violence, Cancer and General Practice

Vicarious trauma, traumatic stress and burnout were investigated among three separate groups of mental health professionals working primarily with three different client populations (sexual violence, cancer, general practice). Participants (N=221) completed the Traumatic Stress Institute Belief Scale Revision M (TSI), the Maslach Burnout Inventory (MBI) and the Impact of Events Scale (IES). Contrary to hypotheses, no significant differences were found between groups. The TSI and MBI were found to be highly correlated, suggesting psychometric overlap. It was concluded within this sample there was little evidence to support vicarious trauma as an occupational hazard unique to therapists working with trauma survivors.
Components of a model adolescent AIDS/drug abuse prevention program: A Delphi study.

The purpose of this study is to specify important components of a model adolescent AIDS/drug abuse prevention program. A modified two-wave Delphi technique was used to intensively survey a nationally targeted group of 10 drug abuse experts and 11 HIV/AIDS experts. Panelists from both groups emphasized the importance of providing specific accurate information on AIDS and drug use. They also recommended behavioral skills training that extends to all areas of the adolescents lives. They agreed that it was important to adapt the program to the specific subculture of the group for whom the program is intended. Implications for family life specialists therapists adolescent AIDS/drug abuse prevention specialists program evaluators and policymakers are discussed. (authors)
A (5 / 3 + ε ) -Approximation for Strip Packing ∗

We study strip packing, which is one of the most classical two-dimensional packing problems: given a collection of rectangles, the problem is to ﬁnd a feasible orthogonal packing without rotations into a strip of width 1 and minimum height. In this paper we present an approximation algorithm for the strip packing problem with absolute approximation ratio of 5 / 3 + ε for any ε > 0 . This result signiﬁcantly narrows the gap between the best known upper bounds of 2 by Schiermeyer and Steinberg and 1 . 9396 by Harren and van Stee and the lower bound 3 / 2 .
Adaptive Log Block Mapping Scheme for Log Buffer-based FTL ( Flash Translation Layer )

Flash memory has been widely used as an important storage device for consumer electronics. For the flash memorybased storage systems, FTL (Flash Translation Layer) is essential to handle the mapping between a logical page address and a physical page address. Especially, log buffer-based FTLs provide good performances with small-sized mapping information. In designing the log buffer-based FTL, one important factor is to determine the mapping architecture between data block and log block, called associativity. While previous works use static associativities fixed at the design time, we propose a new log block mapping scheme which adjusts the associativity considering the irregularity of I/O workload. Our proposed scheme improves the I/O performance by 5~15% compared to the static scheme by adjusting the associativity based on the runtime workload. Keywordsflash memory; flash translation layer; log buffer; hybrid mapping; embedded storage
Four-Film X-ray Series Is More Sensitive Than 2-Film for Diagnosis of Skull Fractures in Children

Objective The objective of this study was to compare the sensitivity and specificity of 2- and 4-film x-ray series when interpreted by pediatric emergency medicine physicians in the diagnosis of skull fracture in children. Methods A noninferiority crossover study was performed. The skull radiographs of the 50 most recent cases of skull fracture for which a 4-film radiography series was available and 50 controls matched for age were reviewed. Two modules, containing a random sequence of 2- and 4-film series of each child, were constructed to have all children evaluated twice (once with 2 films and once with 4 films). Pediatric emergency physicians evaluated both modules 2 to 4 weeks apart. The interpretation of the 4-film series by a pediatric radiologist served as the criterion standard. The sensitivity and specificity of the 2-film versus the 4-film skull x-ray series, in the identification of fracture, were compared. Results Thirteen pediatric emergency physicians participated in the study. For sensitivity, the mean difference between the 2- and 4-view series was higher than the noninferiority margin of 0.055 with an absolute mean difference of 0.060 (4-view minus 2-view series) and a 1-sided 95% higher confidence limit of 0.099. However for specificity, the mean difference was within the margin with an absolute mean difference of 0.011 and a 1-sided 95% higher confidence limit of 0.033. Conclusions For children sustaining a head trauma, the 2-film skull radiography series is not as sensitive as the 4-film series in the detection of fracture, when interpreted by pediatric emergency physicians.
Image classification based on web community structure model

This paper describes a network-theoretic approach for clustering pixels in a remot-sensing image and has received relatively satisfactory results. This approach is divided into two stages—the local classification stage and the global clustering stage. During local classification, the original image is partitioned into small blocks which are converted into local network graphs respectively. Then, the method of optimal modularity based on the modularity matrix is exploited to detect communities (classes) in each block. This paper also performs class merging to those classes that we think they are geometrically dispersed. All the classes left after merging are considered as nodes in the global network graph, and the main color is computed for each class. Finally, the community detection method mentioned above is employed again to achieve the final classification results.
Student Perceptions of a Role-Playing Simulation in an Introductory International Relations Course

An emerging assumption in undergraduate political science education is that role-playing simulations are an effective teaching tool. While previous studies have addressed the pedagogical advantages of simulations as compared to more traditional teaching techniques, less attention has been paid to student perceptions of these simulations. This study uses data collected from an introductory International Relations course that includes a 2-day Model United Nations Crisis Simulation. Students are given a presimulation and postsimulation survey in order to gauge the perceived educational value of classroom simulations. Do undergraduates perceive simulations to be a valuable learning tool? Do these perceptions change after they participate in a simulation? Gender, class rank, and previous interest in world politics are considered. Finally, the authors consider whether students’ perceptions of the simulation experience correlate with the assumptions in the existing literature.
Difference in Reality: Ethnic Minorities and the Boundaries of the Nation in Reality TV in Finland

Reality TV has provided a new platform for ethnic minority performers in various European countries. This article explores the implications of such visibility by focusing on two Finnish reality TV shows: Talent and Big Brother. It is suggested that reality TV shows operate as a site where the definitions of the ordinary and the nation are being circulated, contested, and, at times, stretched. The article demonstrates the ways in which global format, production aims, and audience participation together challenge and expand the concept of Finnishness with transnational dimensions of citizenship and cross-border engagements. However at the same time the persistent nationalism in forms of conflicts and racism pushes through the global format. It is argued that representing difference carries particular contextual commercial value for reality formats applied particularly by strategies of diluting difference and emphasizing conflicts that limit the political potential of these representations.
Thioredoxin Is an Essential Protein Induced by Multiple Stresses in Bacillus subtilis

ABSTRACT Thioredoxin, a small, ubiquitous protein which participates in redox reactions through the reversible oxidation of its active center dithiol to a disulfide, is an essential protein in Bacillus subtilis. A variety of stresses, including heat or salt stress or ethanol treatment, strongly enhanced the synthesis of thioredoxin inB. subtilis. The stress induction of the monocistronictrxA gene encoding thioredoxin occurs at two promoters. The general stress sigma factor, ςB, was required for the initiation of transcription at the upstream site, SB, and the promoter preceding the downstream start site, SA, was presumably recognized by the vegetative sigma factor, ςA. In contrast to the heat-inducible, ςA-dependent promoters preceding the chaperone-encoding operons groESL anddnaK, no CIRCE (for controlling inverted repeat of chaperone expression) was present in the vicinity of the start site, SA. The induction patterns of the promoters differed, with the upstream promoter displaying the typical stress induction of ςB-dependent promoters. Transcription initiating at SA, but not at SB, was also induced after treatment with hydrogen peroxide or puromycin. Such a double control of stress induction at two different promoters seems to be typical of a subgroup of class III heat shock genes of B. subtilis, likeclpC, and it either allows the cells to raise the level of the antioxidant thioredoxin after oxidative stress or allows stressed cells to accumulate thioredoxin. These increased levels of thioredoxin might help stressed B. subtilis cells to maintain the native and reduced state of cellular proteins.
Fuzzy Semantic Matching in (Semi-)Structured XML Documents - Indexation of Noisy Documents

Nowadays, semantics is one of the greatest challenges in IR systems evolution, as well as when it comes to (semi-)structured IR systems which are considered here. Usually, this challenge needs an additional external semantic resource related to the documents collection. In order to compare concepts and from a wider point of view to work with semantic resources, it is necessary to have semantic similarity measures. Similarity measures assume that concepts related to the terms have been identified without ambiguity. Therefore, misspelled terms interfere in term to concept matching process. So, existing semantic aware (semi-)structured IR systems lay on basic concept identification but don’t care about terms spelling uncertainty. We choose to deal with this last aspect and we suggest a way to detect and correct misspelled terms through a fuzzy semantic weighting formula which can be integrated in an IR system. In order to evaluate expected gains, we have developed a prototype which first results on small datasets seem interesting.
Electrical Properties of Nanocrystalline CuCr25 Contact Material

Four pieces of nanocrystalline CuCr25 contacts with 45-mm diameter and 3-mm thickness were prepared, brazed onto cup-axial magnetic field electrodes, and assembled in two commercial vacuum interrupters to test their chopping current, ac dielectric breakdown voltage, and breaking capacity. For comparison, two microcrystalline CuCr25 contacts were also prepared as above. The test vacuum interrupters were operated by a 24-kV circuit breaker with a spring-operated mechanism. The opening velocity was 1.3 m/s and the arc current frequency was about 50 Hz. The experimental results showed that both the chopping current and the ac dielectric breakdown voltage of nanocrystalline CuCr25 contact material were lower than those of the microcrystalline CuCr25 material. The breaking capacity of nanocrystalline CuCr25 material was significantly lower than that of microcrystalline CuCr25. The cathode and the anode contact surfaces of nanocrystalline CuCr25 were seriously eroded by arc in the local areas, and obvious cracks occurred.
Aspirin Resistance and Promoting Blood Circulation and Removing Blood Stasis: Current Situation and Prospectives

Aspirin plays a crucial physiological and pathophysiological role in cardiovascular diseases and cerebrovascular diseases by irreversibly inhibiting thromboxane A2. However, some patients may be “resistant” to its effect. The resistance has close association with adverse cardiovascular outcomes and increased mortality, so that resolving the problem of aspirin resistance (AR) is widely concerned. By studying the correlation between AR and blood stasis syndrome (BSS), it is demonstrated that BSS may be one of the pathogenesis of AR in traditional Chinese medicine. Chinese herb and formulas definitely possess the advantage of whole body regulation by many ways and many targets. It is a new direction for treatment of AR to combine TCM and modern medicine to study the mechanism and prevention of AR.
Bayesian 3D Human Motion Capture Using Factored Particle Filtering

We present a markerless human motion capture system that estimates the 3D positions of the body joints over time. The system uses a dynamic bayesian network and a factored particle filtering algorithm. In this paper we evaluate the impact of using different observation functions for the bayesian state estimation: chamfer distance, a pixel intersection and finally a pseudo-observation of the subject direction calculated from the previous output of the system. We also compare two methods for the factored generation of the particles. The first one uses a deterministic interval exploration strategy whereas the second one is based on an adaptive diffusion. The capacity of the system to recover after occlusion by obstacles was tested on simulated movements in a virtual scene.
Random Polynomial-Time Attacks and Dolev-Yao Models

For several decades two different communities have been working on the formal security of cryptographic protocols. Many efforts have been made recently to take benefit of both approaches, in brief: the comprehensiveness of computational models and the automatizability of formal methods. The purpose of this paper is to investigate an original approach to relate the two views, that is: to extend existing Dolev-Yao models to account for random polynomial-time (Las Vegas) computability. This is done first by noticing that Dolev-Yao models can be seen as transition systems, possibly infinite. We then extend these transition systems with computation times and probabilities. The extended models can account for normal Dolev-Yao transitions as well as nonstandard operations such as inverting a one-way function. Our main contribution consists of showing that under sufficient realistic assumptions the extended models are equivalent to standard Dolev-Yao models as far as security is concerned. Thus our work enlarges the scope of existing decision procedures.
A General Preprocessing Method for Improved Performance of Epipolar Geometry Estimation Algorithms

In this paper a deterministic preprocessing algorithm is presented, whose output can be given as input to most state-of-the-art epipolar geometry estimation algorithms, improving their results considerably. They are now able to succeed on hard cases for which they failed before. The algorithm consists of three steps, whose scope changes from local to global. In the local step it extracts from a pair of images local features (e.g. SIFT). Similar features from each image are clustered and the clusters are matched yielding a large number of putative matches. In the second step pairs of spatially close features (called 2keypoints) are matched and ranked by a classifier. The 2keypoint matches with the highest ranks are selected. In the global step, from each two 2keypoint matches a fundamental matrix is computed. As quite a few of the matrices are generated from correct matches they are used to rank the putative matches found in the first step. For each match the number of fundamental matrices, for which it approximately satisfies the epipolar constraint, is calculated. This set of matches is combined with the putative matches generated by standard methods and their probabilities to be correct are estimated by a classifier. These are then given as input to state-of-the-art epipolar geometry estimation algorithms such as BEEM, BLOGS and USAC yielding much better results than the original algorithms. This was shown in extensive testing performed on almost 900 image pairs from six publicly available data-sets.
A teacher‐developed process for collaborative professional reflection

In Spring 2000, a group of five elementary school teachers met to investigate the nature of professional reflection and develop a process of collaborative reflection as productive professional development. These teachers' beliefs that reflection is both necessary and valuable, coupled with their recommendation that it be collaborative, served as the basis of the process for collaborative reflection developed by the group and described in this paper. While designing the process, these teachers felt very strongly about how it should look and thus, they included many perceived requirements or ‘shoulds’ in their design. Interestingly, when the viability of these ‘shoulds’ were tested, the testing teachers wrestled with the process as designed, finding their naturally emerging reflection process to be more holistic than sequential. Yet, as these teachers struggled with the order of the designed process, they engaged in the tasks themselves, which propelled them through effective reflections.
Transferring Anthropological Techniques in Applied Research

A variety of manuals, handbooks, and field research protocols have been developed over the past decade to facilitate the application of anthropological concepts, methods, and techniques to applied settings. These are variously titled depending on their genesis and disciplinary base; they include community diagnoses, needs analyses, rapid anthropological procedures/assessments (RAP/RAA), focused ethnographic surveys (FES), and to some extent, also rapid rural appraisals (RRA). Their development and their application has been discussed in a number of publications. (For a brief introduction to this literature, see "For Further Reading," page 5.) Nevertheless, there is a continued need for evaluation of the manuals and their uses, as they appear and are adopted by individual researchers, governments, and multilateral agencies.
Pathogenic Yersinia DNA in Intestinal Specimens of Pediatric Patients with Crohn's Disease

Studies indicate a close relationship between Yersinia and Crohn's disease in adults. Our study tested 77 colonic specimens from children with Crohn's disease for the presence of Yersinia DNA using a validated polymerase chain reaction (PCR) assay. Control cases included specimens from 45 ulcerative colitis patients and 10 appendicitis patients. The presence of Yersinia in Crohn's specimens was significant compared to the control specimens (9% vs. 0%; p = 0.0055). While our study supports the medical literature, future studies are needed to determine if the relationship between Crohn's disease and Yersinia is an initiating or mediating factor in the pathogenesis of pediatric Crohn's disease.
A Navigation Method based on BA-POMDP Algorithm

Received: 09 Mar. 2012; Revised 25 Jul. 2012; Accepted 04 Aug. 2012 Reeived: May 8, 2012; Revised May 10, 2012; Accepted May 20, 2012 Abstract: This paper presents a robot navigation method based on hierarchical POMDP and Bayesian Algorithm (BA-POMDP Algorithm) in uncertain environments. A successful and efficient robot navigation method in dynamic environments requires predicting that the uncertainties of state of events as well as obstacles. A novel procedure accounting for both state transition and observation uncertainty in the navigation process is presented. In order to solve the problem in dynamic planning programming that is associated with robot navigation in uncertain environments, we present BA-POMDP algorithm that integrate prediction, estimation and planning while also properly fuse weights by mapping between fusion weights and the immediate environmental configuration. The algorithm is implemented and tested onboard that the elderly companion robot achieves autonomous navigation. Experiments from dynamic scenarios illustrate the effectiveness of the BA-POMDP algorithm.
On the vicissitudes of cultural and evolutionary approaches to social cognition : the case of meta-cognitive myopia

The basic tenet of the present article is that even though the scientific value of macro-biological (evolutionary or inter-cultural) approaches to social cognition may be questioned, evolutionary analyses may serve the creative function of a theory heuristic that can be used instrumentally to further theoretical explanations and to derive new testable implications. This point is illustrated with reference to meta-cognitive myopia, the challenging phenomenon that judgments and decisions are sensitive to the information given in a stimulus sample, but insensitive to the constraints and biases imposed on the genesis of that information. Both anecdotal and experimental evidence for meta-cognitive myopia points to serious shortcomings, but an evolutionary analysis nevertheless reveals that seemingly short-sighted reliance on the sample given may be quite an adaptive strategy. Indeed, some empirical evidence can be found to support some implications derived from the evolutionary interpretation of meta-cognitive.