LLukas22/scidocs huggingface dataset:
Motion planning for anguilliform locomotion

We investigate issues of control and motion planning for a biomimetic robotic system. Previous work has shown that a successful approach to solving the motion planning problem is to decouple it into the two subproblems of trajectory generation (feedforward controls) and feedback regulation. In this paper, we investigate basic issues of momentum generation for a class of dynamic mobile robots, focusing on eel-like swimming robots. We develop theoretical justification for a forward gait that has been observed in nature, and for a turning gait, used in our control laws, that has not been extensively studied in the biological literature. We also explore theoretical predictions for novel gaits for turning and sideways swimming. Finally, we present results from experiments in motion planning for a biomimetic robotic system. We show good agreement with theory for both open and closed-loop control of our modular, five-link, underwater swimming robot using image-based position sensing in an aquatic environment.
Image Segmentation and Identification of Brain Tumor from MRI Image

---------------------------------------------------------------------***------------------------------------------------------------------Abstract— The image processing is an important aspect of medical science to visualize the different anatomical structures of human body. Sometimes it is very difficult or impossible to detect or visualize such hidden abnormal structures by using simple imaging. For such abnormalitical structures, some planar imaging methods are helpful. One of the significant techniques for examining human body is the Magnetic Resonance Imaging (MRI). It is useful for distinguishing and clarifying the neural architecture of human brain. Magnetic resonance imaging (MRI) technique is one of the many imaging modalities that are available to scan and capture the internal soft tissue structures of the body. This paper describes the proposed strategy to detect & extraction of brain tumor from patient’s MRI scan images of the brain. It includes some noise removal functions, segmentation and morphological operations which are the basic terms of image processing. By using MATLAB software we can detect and extract tumor from MRI scan images of the brain.
Active Exoskeletons for Upper-Limb Motion Assist

This paper presents the current state of research into power-assist exoskeletons for the upper limb. The assist of the upper limb is important for physically weak persons in daily activities, since upper-limb motion is involved in many important motions in daily living. The most important criterion is that power-assist exoskeletons assist the user’s motion automatically in accordance with the user’s motion intentions. Electromyogram (EMG) signals in which the user’s motion intention is reflected could provide vital realtime information to facilitate accurate control of the power-assist exoskeleton in accordance with the user’s motion intentions. A four degree-of-freedom active exoskeleton that assists human upper-limb motion (shoulder vertical flexion/extension, shoulder horizontal flexion/extension, elbow flexion/extension, and forearm supination/pronation) is also proposed.
Severe ADC decreases do not predict irreversible tissue damage in humans.

BACKGROUND AND PURPOSE
A mismatch between diffusion- and perfusion-weighted MRI is thought to define tissue at risk of infarction. This concept is based on the assumption that diffusion slowing of and decreases in the apparent diffusion coefficient (ADC) serve as indicator of tissue proceeding to infarction. We tested this hypothesis.


METHODS
MRI (diffusion weighted, perfusion weighted, MRA, T2 weighted) was performed in 15 patients with acute stroke within 2.9+/-0.8 hours (mean+/-SD) of onset and on days 1 and 7. After intraindividual realignment of the ADC maps, the development of ADC range volumes and ADC values was determined.


RESULTS
An increase (354%, group A1) in the total ADC-based lesion volume below a threshold of < 80% occurred in 4 patients on day 1, persisting on day 7 with a pronounced increase of ADC range volumes with low ADC values. An increase in total ADC-based lesion volume (201%, group A2) followed by a secondary drop to day 7 was found in 7 patients. A significant reduction in total ADC-based lesion volume (14%, group B) was found in 4 patients. ADC-based lesion volume increase was associated with persistent vessel occlusion in group A, whereas recanalization in group B resulted in ADC volume decrease. ADC normalization was observed independently from the degree of the initial ADC decrease on days 1 and 7 in group B.


CONCLUSIONS
In line with results from animal experiments, ADC decreases do not reliably indicate tissue infarction Even severely decreased ADC values may normalize in human stroke, and it seems likely that ADC normalization depends on the duration and severity of ischemia rather than the absolute value.
Effect of sampling frequencies on computation of the maximum velocity of saccadic eye movements

The maximum velocity of saccades is widely used in the clinical assessment of topographical diagnoses. Several methodological factors affect the maximum velocity results. The sampling frequency, the resolution of the analog-digital converter, and filtering of the signal are the most important factors. The sampling frequency should preferabel be higher than 300 Hz. Frequencies below 200 Hz severily deform the velocity profile. The resolution of the analog-digital converter should be 10 bits or more. A theoretical model was constructed for maximum velocity computation. A case study of electro-oculographic and photoelectric recordings confirmed the theoretical model.
MedioVis - A User-Centred Library Metadata Browser

MedioVis is a visual information seeking system which was designed especially for library data. The objective target was to create a system which simplifies and optimizes the user’s information seeking process and thus further motivates the user to browse in the library stock. To enhance the motivation special attention was given to consider joy of use aspects during the design of the user interface. The primary user interface design is based on multiple coordinated views to offer a great variety of exploration possibilities in a directmanipulative manner. To accomplish a self-explanatory usability of the system for non-expert users, the development was accompanied by continuous user tests with casual and regular library users. At the end of the development process a comprehensive summative evaluation was conducted, comparing efficiency and joy of use of the existing web-based catalogue system KOALA of the library of the University of Konstanz with the MedioVis system. The results of this comparative evaluation show a significant improvement of the efficiency of the information seeking process with the help of MedioVis. The users also rated MedioVis significantly better in all dimensions of its hedonic quality and appeal compared with KOALA.
Trace Element Concentration in Primary Liver Cancers—A Systematic Review

The incidence of primary liver cancer varies between countries. Many of the etiological factors contributing to the geographical variations in incidence are unknown. Development of hepatocellular carcinoma has been linked to levels of trace elements. This review summarizes the evidence associating HCC with trace elements. MEDLINE, EMBASE, and CENTRAL databases were searched. Various inclusion and exclusion criteria were applied to select the articles for inclusion. Data extraction was performed using a custom designed data extraction form. A total of 12,344 references were identified. Duplicates, 1,597, were excluded. Clearly irrelevant references, 10,676, were excluded through reading titles and abstracts. Some references (59) were excluded by applying the exclusion criteria. Twelve studies including 646 patients and measuring iron content (8), copper content (11), zinc (9), and selenium (2) qualified for the review. Although a meta-analysis was not possible due to heterogeneity between the studies, a clear pattern of distribution of the trace elements was discernible. Iron and zinc content are lower in HCC than in surrounding tissues or normal controls. Copper content is lower in HCC than in surrounding tissues and cirrhotic controls. Epidemiological and physiological reasons for the trace element alterations should be further investigated.
SLIDING MODE CONTROL OF A MAGNETIC LEVITATION SYSTEM

Sliding mode control schemes of the static and dynamic types are proposed for the control of a magnetic levitation system. The proposed controllers guarantee the asymptotic regulation of the states of the system to their desired values. Simulation results of the proposed controllers are given to illustrate the effectiveness of them. Robustness of the control schemes to changes in the parameters of the system is also investigated.
Papular epidermal nevus with "skyline" basal cell layer (PENS).

BACKGROUND
Several types of epidermal keratinocytic nevus are recognized.


OBJECTIVE
We sought to describe a previously unreported keratinocytic nevus with distinctive clinical and histopathologic features in 5 patients.


METHODS
We performed a clinical and photographic review, and obtained skin biopsy samples for histopathologic examination from each patient. Genetic analysis to screen for fibroblast growth factor receptor 3 and phosphatidylinositol 3-kinase, catalytic, alpha hotspot mutations was performed on lesional skin from two patients.


RESULTS
Five infants (2 male, 3 female) had from 1 to 11 lesions present since birth. These consisted of 1- to 7-mm hyperkeratotic papules with a rough, flat surface and a round, commalike, rectangular, or polygonal shape. Histopathologic examination showed acanthosis with broad and rectangular rete ridges, and strikingly arranged basal cells with palisaded nuclei. Genetic testing on paraffin-embedded specimens from two patients ruled out hotspot mutations in the fibroblast growth factor receptor 3 and phosphatidylinositol 3-kinase, catalytic, alpha genes.


LIMITATIONS
A small number of patients are presented.


CONCLUSION
We propose the name "papular epidermal nevus with 'skyline' basal cell layer" (PENS) for this newly recognized condition.
Cognitive Assistants for Evidence-Based Reasoning Tasks

Evidence-based reasoning is at the core of many problem solving and decision making tasks in a wide variety of domains. This paper introduces a computational theory of evidence-based reasoning, the architecture of a learning agent shell which incorporates general knowledge for evidence-based reasoning, a methodology that uses the shell to rapidly develop cognitive assistants in a specific domain, and a sample cognitive assistant for intelligence analysis.
Safety, Tolerability, and Immunogenicity of the Novel Antituberculous Vaccine RUTI: Randomized, Placebo-Controlled Phase II Clinical Trial in Patients with Latent Tuberculosis Infection

OBJECTIVES
To evaluate the safety, tolerability and immunogenicity of three different doses (5, 25 and 50 µg) of the novel antituberculous vaccine RUTI compared to placebo in subjects with latent tuberculosis infection.


METHODS AND FINDINGS
Double-blind, randomized, placebo-controlled Phase II Clinical Trial (95 patients randomized). Three different RUTI doses and placebo were tested, randomized both in HIV-positive (n = 47) and HIV-negative subjects (n = 48), after completion of one month isoniazid (INH) pre-vaccination. Each subject received two vaccine administrations, 28 Days apart. Five patients withdrew and 90 patients completed the study. Assessment of safety showed no deaths during study. Two subjects had serious adverse events one had a retinal detachment while taking INH and was not randomized and the other had a severe local injection site abscess on each arm and was hospitalized; causality was assessed as very likely and by the end of the study the outcome had resolved. All the patients except 5 (21%) patients of the placebo group (3 HIV+ and 2 HIV-) reported at least one adverse event (AE) during the study. The most frequently occurring AEs among RUTI recipients were (% in HIV+/-): injection site reactions [erythema (91/92), induration (94/92), local nodules (46/25), local pain (66/75), sterile abscess (6/6), swelling (74/83), ulcer (20/11), headache (17/22) and nasopharyngitis (20/5)]. These events were mostly mild and well tolerated. Overall, a polyantigenic response was observed, which differed by HIV- status. The best polyantigenic response was obtained when administrating 25 µg RUTI, especially in HIV-positive subjects which was not increased after the second inoculation.


CONCLUSION
This Phase II clinical trial demonstrates reasonable tolerability of RUTI. The immunogenicity profile of RUTI vaccine in LTBI subjects, even being variable among groups, allows us considering one single injection of one of the highest doses in future trials, preceded by an extended safety clinical phase.


TRIAL REGISTRATION
ClinicalTrials.gov NCT01136161.
Maximizing product adoption in social networks

One of the key objectives of viral marketing is to identify a small set of users in a social network, who when convinced to adopt a product will influence others in the network leading to a large number of adoptions in an expected sense. The seminal work of Kempe et al. [13] approaches this as the problem of influence maximization. This and other previous papers tacitly assume that a user who is influenced (or, informed) about a product necessarily adopts the product and encourages her friends to adopt it. However, an influenced user may not adopt the product herself, and yet form an opinion based on the experiences of her friends, and share this opinion with others. Furthermore, a user who adopts the product may not like the product and hence not encourage her friends to adopt it to the same extent as another user who adopted and liked the product. This is independent of the extent to which those friends are influenced by her. Previous works do not account for these phenomena.
 We argue that it is important to distinguish product adoption from influence. We propose a model that factors in a user's experience (or projected experience) with a product. We adapt the classical Linear Threshold (LT) propagation model by defining an objective function that explicitly captures product adoption, as opposed to influence. We show that under our model, adoption maximization is NP-hard and the objective function is monotone and submodular, thus admitting an approximation algorithm. We perform experiments on three real popular social networks and show that our model is able to distinguish between influence and adoption, and predict product adoption much more accurately than approaches based on the classical LT model.
Effects of planted tree fallows on soil nitrogen dynamics, above-ground and root biomass, N2-fixation and subsequent maize crop productivity in Kenya

The effects of planted fallows of Sesbania sesban (L.) Merr. and Calliandra calothyrsus (Meissner) on soil inorganic nitrogen dynamics and two subsequent maize crops were evaluated under field conditions in the highlands of eastern Kenya. Continuous unfertilised maize, maize/bean rotation and natural regrowth of vegetation (weed fallow) were used as control treatments. The proportion of symbiotic N2-fixation was estimated by measuring both leaf 15N enrichment and whole-plant 15N enrichment by the 15N dilution technique for Sesbania and Calliandra, using Eucalyptus saligna (Sm.) and Grevillea robusta (A. Cunn) as reference species. Above- and below-ground biomass and N contents were examined in Sesbania, Calliandra, Eucalyptus and Grevillea 22 months after planting. Both the content of inorganic N in the topsoil and the quantity of N mineralised during rainy seasons were higher after the Sesbania fallows than after the other treatments. Compared to the continuous unfertilised maize treatment, both residual crop yields were significantly higher when mineral N (one application of 60 kg N ha−1) was added. Furthermore, the second crop following the Sesbania fallow was significantly higher than the continuous maize crop. The above-ground biomass of the trees at final harvest were 31.5, 24.5, 32.5 and 43.5 Mg ha−1 for the Sesbania, Calliandra, Grevillea and Eucalyptus, respectively. For the total below-ground biomass the values for these same tree species were 11.1, 15.5, 17.7, and 19.1 Mg ha−1, respectively, of which coarse roots (>2 mm), including tap roots, amounted to 70–90%. About 70–90% of the N in Sesbania, and 50–70% in Calliandra, was derived from N2-fixation. Estimates based on leaf 15N enrichment and whole-plant 15N enrichment were strongly correlated. The N added by N2-fixation amounted to 280–360 kg N ha−1 for Sesbania and 120–170 kg N ha−1 for Calliandra, resulting in a positive N balance after two maize cropping seasons of 170–250 kg N ha−1 and 90–140 kg N ha−1, for Sesbania and Calliandra, respectively. All the other treatments gave negative N balances after two cropping seasons. We conclude that Sesbania sesban is a tree species well suited for short duration fallows due to its fast growth, high nutrient content, high litter quality and its ability to fix large amounts of N2 from the atmosphere.
Computationally Efficient Face Spoofing Detection with Motion Magnification

For a robust face biometric system, a reliable anti-spoofing approach must be deployed to circumvent the print and replay attacks. Several techniques have been proposed to counter face spoofing, however a robust solution that is computationally efficient is still unavailable. This paper presents a new approach for spoofing detection in face videos using motion magnification. Eulerian motion magnification approach is used to enhance the facial expressions commonly exhibited by subjects in a captured video. Next, two types of feature extraction algorithms are proposed: (i) a configuration of LBP that provides improved performance compared to other computationally expensive texture based approaches and (ii) motion estimation approach using HOOF descriptor. On the Print Attack and Replay Attack spoofing datasets, the proposed framework improves the state-of-art performance, especially HOOF descriptor yielding a near perfect half total error rate of 0%and 1.25% respectively.
A generic statistical approach for spam detection in Online Social Networks

25 26 27 28 29 30 31 32 33 34 35 36 Article history: Received 13 February 2012 Received in revised form 18 March 2013 Accepted 4 April 2013 Available online xxxx
A new training model for adult circumcision.

BACKGROUND
Adult circumcision is an extremely common surgical operation. As such, we developed a simple model to teach junior doctors the various techniques of circumcision in a safe, reliable, and realistic manner.


MATERIALS AND METHODS
A commonly available simulated model penis (Pharmabotics, Limited, Winchester, United Kingdom) is used, which is then covered with a 30-mm diameter, 400-mm long, double-layered simulated bowel (Limbs & Things, Bristol, United Kingdom). The 2 layers of the prepuce are simulated by folding the simulated bowel on itself. The model has been officially adopted in the UroEmerge hands-on practical skills course and all participants were asked to provide feedback about their experience on a scale from 1 to 10 (1 = extremely unsatisfied and 10 = excellent).


RESULTS
The model has been used successfully to demonstrate, teach, and practice adult circumcision as well as other penile procedures with rating by trainees ranged from 7 to 10 (median: 9), and 9 of 12 trainees commented on the model using expressions such as "life like," "excellent idea," or "extremely beneficial."


CONCLUSIONS
The model is particularly useful as it is life like, realistic, easy to set up, and can be used to repeatedly demonstrate circumcision, as well as other surgical procedures, such as dorsal slit and paraphimosis reduction.
Correlation between channel state and information source with empirical coordination constraint

Correlation between channel state and source symbol is under investigation for a joint source-channel coding problem. We investigate simultaneously the lossless transmission of information and the empirical coordination of channel inputs with the symbols of source and states. Empirical coordination is achievable if the sequences of source symbols, channel states, channel inputs and channel outputs are jointly typical for a target joint probability distribution. We characterize the joint distributions that are achievable under lossless decoding constraint. The performance of the coordination is evaluated by an objective function. For example, we determine the minimal distortion between symbols of source and channel inputs for lossless decoding. We show that the correlation source/channel state improves the feasibility of the transmission.
Brain-Computer Interface Operation of Robotic and Prosthetic Devices

Brain-computer interfaces (BCIs) use signals recorded from the brain to operate robotic or prosthetic devices. Both invasive and noninvasive approaches have proven effective. Achieving the speed, accuracy, and reliability necessary for real-world applications remains the major challenge for BCI-based robotic control.
Grounding Visual Explanations (Extended Abstract)

Existing models [2] which generate textual explanations enforce task relevance through a discriminative term loss function, but such mechanisms only weakly constrain mentioned object parts to actually be present in the image. In this paper, a new model is proposed for generating explanations by utilizing localized grounding of constituent phrases in generated explanations to ensure image relevance. Specifically, we introduce a phrase-critic model to refine (re-score/re-rank) generated candidate explanations and employ a relative-attribute inspired ranking loss using ‘flipped’ phrases as negative examples for training. At test time, our phrase-critic model takes an image and a candidate explanation as input and outputs a score indicating how well the candidate explanation is grounded in the image.
Broadening the scope of research on emotion regulation strategies and psychopathology.

Despite the increasing interest in the study of emotion regulation strategies and psychopathology, researchers have predominantly focused on covert emotion regulation strategies-that is, those strategies that occur within the individual (e.g., cognitive reappraisal, suppression). Conversely, less attention has been devoted to the examination of the relationship between psychopathology and overt emotion regulation strategies (e.g., drinking alcohol, seeking advice). This has resulted in a limited understanding of the complex repertoire of emotion regulation strategies that individuals possess, and how patterns in the use of strategies might relate to psychopathology. We asked 218 undergraduates to report on their habitual use of 15 covert and overt emotion regulation strategies and symptoms of seven different mental disorders. Overt strategies were associated with symptoms and, at times, they predicted psychopathology above and beyond the more frequently studied covert strategies. These findings have implications for developing a more sophisticated understanding of patterns of adaptive and maladaptive emotion regulation.
Global citizenship using Philosophy for Children

Philosophy for Children is a teaching methodology that helps develop pupils' critical thinking and enables them to engage with quite complex global issues.
О школе праксиса

This paper describes the Yugoslav Marxist humanist movement called the Praxis School. Members of the School Praxis believe that modern socialist Soviet society and the theory of Marx is not the same. Soviet and Yugoslav socialism become the subject of criticism of the school. In consequence of that, many leaders of the schools have been forced to emigrate.