Miracle-dz/UniFAR-FTUs huggingface dataset:
Poster: An Online Approach for Gait Recognition on Smart Glasses

With the fast development and increasing population of the wearable devices involves in our daily life, the security of the privacy information on those devices is attracting significant attentions. One of the possible solution is to enable the devices to recognise the real owner with authentication system. Biometrics recognition is popular used for authentication systems. The biometrics used including faces, fingerprints, gait cycles and etc. Using gait cycles as the criteria for identities recognition is superior than other biometrics as the gait information can be collected by the IMU sensors which are most popular embedded on portable devices and they cannot be reproduced by the invaders. We propose, Securitas, the continuous authentication system exploits the information from IMU sensors on the smart glasses to distinguish different wearers.
Embodied learning mechanics and their relationship to usability of handheld augmented reality

Researchers in HCI have designed and developed Augmented Reality for over two decades. Recently, there has been increased interest in exploring an embodied perspective on interaction, where the focus is on the fundamental role played by the physical body in how we experience. This paper presents an overview of embodied cognition as it relates to augmented reality, along with specific interaction mechanics that can engage embodied learning in augmented reality. Further, we reflect on children's usability of handheld augmented reality, presenting a set of usability problems encountered by children, and reflections on how these problems impact the use of embodied interaction learning mechanics for young children.
Characterisation of nanometric chromium coatings in metal–polymer composites

Electrolytic chromium-coated steel (ECCS) plates are surface protected by a semi-crystalline polyethylene terephthalate (PET) polymer coating that provides mechanical and corrosion resistance properties. At the interface level, the steel is protected by a nanometric electrolytic chromium-based coating that chemically binds with the PET layer. However, axial deformations of the composite alter the chromium oxide layers, due to manufacturing surface discontinuities and the existence of detachment areas, producing adhesion failures, as well as changes in the surface and interfacial morphology of the composite, which limit its functionality. This study evaluated the correlations between delamination areas and uniaxial deformations, and assessed the effect on the chromium layers concerning protection and adherence. The results produced delamination maps, which showed the formation of microcracks on the chromium coatings, and indicated the changes that weakened the metal–polymer chemical bonds that consequently decrease the potential performance of industrial applications such as food containers.
Small signal stability sensitivity to generation dispatch through participation factors

This paper examines the small signal stability problem and proposes a methodology for understanding how the generation dispatch and tie line power flow affect the inter area mode damping. The proposed methodology applies numerical sensitivity analysis. Mode sensitivity is achieved by considering three different systems evaluated under different operating conditions. The analysis carried out in this paper demonstrates that the effect of generation dispatch and line power flow on power system stability highly depends on active power provided by generators with high participation factors in power system inter-area modes. Results of this paper can be used by power system operators and planners to improve power system stability by defining generation dispatch taking into account small signal stability issues.
Changing dendritic field size of mouse retinal ganglion cells in early postnatal development

During early postnatal development, dendrites of retinal ganglion cells (RGCs) extend and branch in the inner plexiform layer to establish the adult level of stratification, pattern of branching, and coverage. Many studies have described the branching patterns, transient features, and regulatory factors of stratification of the RGCs. The rate of RGC dendritic field (DF) expansion relative to the growing retina has not been systematically investigated. In this study, we used two methods to examine the relative expansion of RGC DFs. First, we measured the size of RGC DFs and the diameters of the eyeballs at several postnatal stages. We compared the measurements with the RGC DF sizes calculated from difference of the eyeball sizes based on a linear expansion assumption. Second, we used the number of cholinergic amacrine cells (SACs) circumscribed by the DFs of RGCs at corresponding time points as an internal ruler to assess the size of DFs. We found most RGCs exhibit a phase of faster expansion relative to the retina between postnatal day 8 (P8) and P13, followed by a phase of retraction between P13 and adulthood. The morphological α cells showed the faster growing phase but not the retraction phase, whereas the morphological ON–OFF direction selective ganglion cells expanded in the same pace as the growing retina. These findings indicate different RGCs show different modes of growth, whereas most subtypes exhibit a fast expansion followed by a retraction phase to reach the adult size. © 2009 Wiley Periodicals, Inc. Develop Neurobiol 70: 397–407, 2010
Pseudo-Immersive Real-Time Display of 3D Scenes on Mobile Devices

The display of complex 3D scenes in real-time on mobile devices is difficult due to the insufficient data throughput and a relatively weak graphics performance. Hence, we propose a client-server system, where the processing of the complex scene is performed on a server and the resulting data is streamed to the mobile device. In order to cope with low transmission bit rates, the server sends new data only with a frame rate of about 2 Hz. However, instead of sending plain frame buffers, the server decomposes the scene geometry represented by the current view's depth profile into a small set of textured polygons. This processing does not require the knowledge of objects or structures in the scene, i.e. the output of Time-of-flight cameras can be handled as well. The 2.5D representation of the current frame allows the mobile device to render plausibly distorted views of the scene at high frame rates as long as the viewing position does not change too much before the next frame arrives from the server. In order to further augment the visual experience, we use the mobile device's built-in camera or gyroscope to detect the spatial relation between the user's face and the device, so that the camera view can be adapted accordingly. This produces a pseudo-immersive visual effect. Besides designing the overall system with a render-server, 3D display client, and real-time face/pose detection, our main technical contribution is a highly efficient algorithm that decomposes a frame buffer with per-pixel depth and normal information into a small set of planar regions which can be textured with the current frame. This representation is simple enough for real time display on today's mobile devices.
Effective hand segmentation and gesture recognition for browsing web pages on a large screen

Modern digital family technology enables people surf the Internet and watch videos via a large screen. This paper proposes an effective scheme for using hand gestures rather than the common remote controllers to browse the web pages on a large TV screen. The proposed scheme models four gesture modes: mouse mode, scroll mode, zoom mode and input mode to help the user browse Web pages naturally and comfortably. Then we combine RGB, depth, motion information and face detection to achieve accurate and real-time hand segmentation and gesture recognition for enabling the four gesture modes. The experiments show the proposed scheme works well in various illumination environments and complicated backgrounds with multiple moving humans. The recognition accuracy of hand shapes in the proposed scheme arrives at 98.50%, and the successful rate for visual digits input reaches 89.00%. Furthermore, the frame rate of the hand-gesture detection and recognition is about 18 fps. Thus the scheme is accurate, real-time and natural.
A Common Protocol for Agent-Based Social Simulation

Traditional (i.e. analytical) modelling practices in the social sciences rely on a very well established, although implicit, methodological protocol, both with respect to the way models are presented and to the kinds of analysis that are performed. Unfortunately, computer-simulated models often lack such a reference to an accepted methodological standard. This is one of the main reasons for the scepticism among mainstream social scientists that results in low acceptance of papers with agent-based methodology in the top journals. We identify some methodological pitfalls that, according to us, are common in papers employing agent-based simulations, and propose appropriate solutions. We discuss each issue with reference to a general characterization of dynamic micro models, which encompasses both analytical and simulation models. In the way, we also clarify some confusing terminology. We then propose a three-stage process that could lead to the establishment of methodological standards in social and economic simulations.
Oncogenic Function and Early Detection Potential of miRNA-10b in Oral Cancer as Identified by microRNA Profiling

The miRNA participates in a variety of biologic processes, and dysregulation of miRNA is associated with malignant transformation. In this study, we determined specific profile of miRNA associated with oral cancer by using miRNA array screening method. There were 23 miRNAs found with considerably differential expressions between six oral cancer cell lines and five lines of normal oral keratinocytes, in which, 10 miRNAs showed the highest significant difference after independent examination by reverse transcription quantitative PCR. Eight molecules were upregulated, miR-10b, miR-196a, miR-196b, miR-582-5p, miR-15b, miR-301, miR-148b, and miR-128a, and two molecules, miR-503 and miR-31, were downregulated. The most upregulated miR-10b was further examined, and its functions were characterized in two oral cancer cell lines. The miR-10b actively promotes cell migration (2.6- to 3.6-fold) and invasion (1.7- to 1.9-fold) but has minimal effect on cell growth or chemo-/radiosensitivity. Furthermore, miR-10b was considerably elevated in the plasma of xenografted tumor mice (20-fold). This upregulation of miR-10b in plasma was further shown in the patients with oral cancer [P < 0.0001, area under curve (AUC) = 0.932] and precancer lesions (P < 0.0001, AUC = 0.967), suggesting that miR-10b possesses a high potential to discriminate the normal subjects. In conclusion, we have identified at least 10 miRNAs significantly associated with oral cancer, including the most elevated miR-10b. The miR-10b actively participates in cancer formation by promoting cell migration and invasion. Our study using clinical samples suggests that plasma miR-10b has high potential as an early detection marker for oral cancer. Cancer Prev Res; 5(4); 665–74. ©2012 AACR.
Finding and Visualizing Graph Clusters Using PageRank Optimization

Abstract We give algorithms for finding graph clusters and drawing graphs, highlighting local community structure within the context of a larger network. For a given graph G, we use the personalized PageRank vectors to determine a set of clusters, by optimizing the jumping parameter α subject to several cluster variance measures in order to capture the graph structure according to PageRank. We then give a graph visualization algorithm for the clusters using PageRank-based coordinates. Several drawings of real-world data are given, illustrating the partition and local community structure.
Enhancement of the photocatalytic efficiency of WO3 nanoparticles via hydrogen plasma treatment

Surface defect engineering is able to effectively enhance the photocatalytic performance of WO3 nanoparticles. In this paper, radio frequency hydrogen plasma was employed to create surface defects on WO3 nanoparticles. X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) analysis confirmed that hydrogen plasma modification increases the density of oxygen vacancies on the surface of WO3. The broadening of characteristic WO3 peaks in Raman spectra indicates the increase of oxygen vacancies by increasing voltage in hydrogen plasma treatment. The sample treated with hydrogen plasma at 20 volts shows enhancement in photocurrent density by an order of magnitude, attributable to the band-gap narrowing and subsequent increase of quantum yield in the visible range. Consistent results were also obtained from photocatalytic O2 evolution from water oxidation.
Mask materials for powder blasting

Powder blasting, or abrasive jet machining (AJM), is a technique in which a particle jet is directed towards a target for mechanical material removal. It is a fast, cheap and accurate directional etch technique for brittle materials such as glass, silicon and ceramics. The particle jet (which expands to about 1 cm in diameter) can be optimized for etching, while the mask defines the small and complex structures. The quality of the mask influences the performance of powder blasting. In this study we tested and compared several mask types and added a new one: electroplated copper. The latter combines a highly resistant mask material for powder blasting with the high-resolution capabilities of lithography, which makes it possible to obtain an accurate pattern transfer and small feature sizes (<50 µm).
Effect of the Excitation Source on the Quantum-Yield Measurements of Rhodamine B Laser Dye Studied Using Thermal-Lens Technique

A dual-beam transient thermal-lens technique was employed for the determination of absolute fluorescence quantum-yield measurements of Rhodamine B laser dye in different solvents. We investigated the effect of excitation on the absolute fluorescence quantum yield of Rhodamine B. 514 nm radiation from an argon ion laser was used as a cw excitation source and 532 nm pulses from a Q-switched Nd:YAG laser were used as a pulsed excitation source. The fluorescence quantum-yield values were found to be strongly influenced by environmental effects as well as the transient nature of the excitation beam. Our results also indicate that parameters, like the concentration of the dye solution, aggregate formation and excited state absorption, affect the absolute values of the fluorescence yield significantly.
Exploring the vertical dimension of dynamic beam steering

This paper investigates the properties of a cellular mobile radio system with the capability to dynamically adapt the downtilt at the base station on a per terminal basis. We compare several realization options of this vertical beam steering and explore the impacts of downtilt, vertical half-power beam width (HPBW) and inter-site distance (ISD) on spectral efficiency and cell coverage. We show that our approach improves performance in single-cell environment and can achieve a significant amount of interference avoidance already without any kind of coordination between cells.
Endoscopic ultrasound-guided transmural drainage of a pancreatic collection: case report of a massive hemoperitoneum without intracystic bleeding

A 51-year-old woman was referred for the management of a painful pseudocyst, 50mm in diameter, in the tail of the pancreas. The pseudocyst had mature walls and was close to the gastrointestinal lumen [1]. The patient had no ascites and no coagulation disorder. Segmental portal hypertension was noted on computed tomographic examination. A cystogastrostomywas donewith a 10-Fr cystotome, and two 7-Fr, 7-cm plastic prostheses were introduced after dilation of the orificewith an 8-mmballoon. There were no operative adverse events. In the recovery room, the patient developed hemodynamic instability, with a hemoglobin level of 4.5g/dL. An angioscan revealed a massive hemoperitoneum with strictly intraperitoneal active bleeding (●" Fig.1). An emergency caudal splenopancreatectomy was performed. The source of the bleeding was at a distance from the point of puncture of the cystogastrostomy, at the level of the gastric wall (●" Fig.2). The pseudocyst walls were intact, and there were no sequelae related to coagulation of the cystostomy, confirmed afterward by histologic examination. The patient remained in intensive care for 2 days and was discharged 15 days after admission without any recurrence of adverse events. Endoscopic ultrasound-guided transmural drainage of a pseudocyst is an effective and safe procedure, with a median success rate of 89%, an average morbidity rate of 13%, and a mortality rate of 0.3% [2]. Major adverse events are bleeding, pneumoperitoneum, and infection. Rarer adverse events are pancreatitis, pancreatic fistula, stent migration and tract dehiscence, Ogilvie syndrome, pneumothorax, and air embolism [3–5]. Although hemorrhage is a well-known complication, this is the first described case of hemoperitoneumwithout rupture, intracystic bleeding, or direct trauma to an interposed vessel. We suspect laceration of a vessel located in the intraperitoneal gastric wall, secondary to the balloon dilation. Awareness is necessary, and excessive dilation should be avoided in a patient with segmental portal hypertensionwho is undergoing EUS-guided transmural drainage of a pancreatic collection.
Behind the curtain: students' use of VIP after class

Previous visualization research has focused mainly on specific tools. This paper presents an alternative approach that focuses on the students and what use they typically make of the tool. Taking students who voluntarily and regularly use the program visualization tool Visual InterPreter (VIP) for their programming assignments, we conducted a qualitative empirical study to observe how these students go about solving assignments with VIP. In the data analysis, we reconstructed students' usage activities with VIP and their successful as well as inconclusive use of strategies, which we then conceptualized to students' working patterns.
Age, period and cohort effects on time trends in alcohol consumption in the Swedish adult population 1979-2011.

AIMS In Sweden, alcohol abstention has increased over the last 20 years and consumption has recently decreased after a peak in 2004. To understand the dynamics of these trends the present study aims at estimating age, period and cohort (APC) effects on trends in alcohol use prevalence as well as overall and beverage-specific volume of drinking over the last three decades. METHODS APC analysis of seven cross-sectional surveys from 1979 to 2011 was conducted using cross-classified random effects models (CCREMs) by gender. The nationally representative samples comprised 77,598 respondents aged 16-80 years. Outcome measures were 30-day prevalence of alcohol use and overall as well as beverage-specific alcohol volume. RESULTS Trends in prevalence, overall and beverage-specific volume were significantly affected by APC. The period effects of prevalence and overall volume show a small decline after an increase up to the year 2005. Mean beer and wine volume levelled off after a peak in 2005 and volume of spirits drinking decreased constantly. Predicted alcohol prevalence rates in male cohorts (1945-1985) remained generally at the same level, while they declined in post-World War II female generations. Results point to high overall and beverage-specific consumption among cohorts born in the 1940s, 1950s and 1980s. CONCLUSIONS High consuming cohorts of the 1940-1950s were key in rising consumption up to 2005. Progression through the life course of these cohorts, a decrease in prevalence and drinking volume in successive cohorts seem to have contributed to the recent downward trend in alcohol use in Sweden.
Normal-Based Methods for a Gamma Distribution

In this article we propose inferential procedures for a gamma distribution using the Wilson–Hilferty (WH) normal approximation. Specifically, using the result that the cube root of a gamma random variable is approximately normally distributed, we propose normal-based approaches for a gamma distribution for (a) constructing prediction limits, one-sided tolerance limits, and tolerance intervals; (b) for obtaining upper prediction limits for at least l of m observations from a gamma distribution at each of r locations; and (c) assessing the reliability of a stress-strength model involving two independent gamma random variables. For each problem, a normal-based approximate procedure is outlined, and its applicability and validity for a gamma distribution are studied using Monte Carlo simulation. Our investigation shows that the approximate procedures are very satisfactory for all of these problems. For each problem considered, the results are illustrated using practical examples. Our overall conclusion is that the WH normal approximation provides a simple, easy-to-use unified approach for addressing various problems for the gamma distribution.
Postpartum Screening for Diabetes Among Women With a History of Gestational Diabetes Mellitus

Introduction To make recommendations for future clinical, public health, and research practices for women with abnormal glucose tolerance during pregnancy, we reviewed the latest evidence regarding rates of postpartum diabetes screening and types of screening tests. Methods We searched PubMed for journal articles published from January 2008 through December 2010 that reported on postpartum screening and studies designed to prevent progression to type 2 diabetes among women with gestational diabetes mellitus (GDM). Two authors independently reviewed titles and abstracts from 265 articles. Results From 34% to 73% of women with GDM completed postpartum glucose screening. Predictors of higher screening rates included older age, nulliparity, and higher income or education. Screening rates varied by race/ethnicity; Asian women were more likely to be screened than were other racial/ethnic minorities. Women who received prenatal care, who were treated with insulin during pregnancy, or who completed a 6-week postpartum visit were also more likely to receive screening. A moderate proportion of women screened had type 2 diabetes (1.2%-4.5%) or prediabetes (12.2%-36.0%). Conclusion Rates of postpartum screening among women with a history of GDM are low; only half of women in most populations are screened. Our findings can inform future screening initiatives designed to overcome barriers to screening for both providers and patients. Well-designed lifestyle interventions specific to women with a history of abnormal glucose tolerance during pregnancy and also studies to determine the efficacy and safety of pharmacological interventions will be important to help prevent progression to diabetes among these high-risk women.
Tissue characterization by using fractal dimension of B-scan image

Classification of normal liver and diffuse liver disease, fatty liver and liver cirrhosis, by using the fractal dimension of ultrasound B-scan images is studied. The ruggedness of distribution of texture is classified by fractal dimension. For the fatty liver there are smaller particles in the texture compared with those of normal liver, and they dare distributed uniformly. For this situation the degree of ruggedness is considered to be high. For liver cirrhosis the various sizes of particles are distributed irregularly in the image and thus the state of distribution is considered to be a low degree of ruggedness compared with the fatty liver. For the normal liver the ruggedness is considered to be in between those of fatty liver and liver cirrhosis. Since the degree of ruggedness is varied by values of the fractal dimension, it may be possible to characterize the pathological states of the liver. <<ETX>>