Miracle-dz/UniFAR-FTUs huggingface dataset:
Wireless device identification with radiometric signatures

We design, implement, and evaluate a technique to identify the source network interface card (NIC) of an IEEE 802.11 frame through passive radio-frequency analysis. This technique, called PARADIS, leverages minute imperfections of transmitter hardware that are acquired at manufacture and are present even in otherwise identical NICs. These imperfections are transmitter-specific and manifest themselves as artifacts of the emitted signals. In PARADIS, we measure differentiating artifacts of individual wireless frames in the modulation domain, apply suitable machine-learning classification tools to achieve significantly higher degrees of NIC identification accuracy than prior best known schemes. We experimentally demonstrate effectiveness of PARADIS in differentiating between more than 130 identical 802.11 NICs with accuracy in excess of 99%. Our results also show that the accuracy of PARADIS is resilient against ambient noise and fluctuations of the wireless channel. Although our implementation deals exclusively with IEEE 802.11, the approach itself is general and will work with any digital modulation scheme.
Sensory Restoration in Cortical Level After a Contralateral C7 Nerve Transfer to an Injured Arm in Rats

BACKGROUNDThe restoration of sensory and motor function in brachial plexus root avulsion patients is a difficult challenge. The central nervous system plays an important role in sensory recovery after peripheral nerve injury and repair. OBJECTIVETo investigate the sensory restoration process after surgery at the cortical level in rodent models with a contralateral C7 nerve transfer. METHODSThirty-five male Sprague-Dawley rats were used in this experiment, and both behavioral tests and somatosensory evoked potentials were used to investigate the sensory function recovery of the injured forepaws and the cortical reorganization in the rats postoperatively. RESULTSThe results demonstrated a dynamic change in the ipsilateral somatosensory cortex, both in the shape and location, where overlapping sensory cortical representations of the healthy and injured forepaws were observed consistently. Behavioral tests show that the sensation first occurred only in the healthy forepaw and later in both when stimulating the injured one, which suggested a tendency of the sensation function to recover in the injured forepaws of the rats as time progressed. CONCLUSIONThe cortical reorganization occurred only in the ipsilateral hemisphere, which is different from the motor cortex reorganization using the same model as that described in a previous study. This reorganization pattern offers an interpretation of the unique sensory recovery process after the transfer of the C7 nerve to the contralateral median nerve, but also provides the basis for further sensory restoration in clinical practice.
faktor-Faktor yang Mempengaruhi Kinerja Guru SMP Kabupaten Magelang

Penelitian ini bertujuan untuk mengungkap pengaruh usaha dalam memenuhi kebutuhan, kemampuan, dan persepsi terhadap tugas terhadap kinerja guru SMP di Kabupaten Magelang. Populasi penelitian ini adalah 2.559 orang guru SMP di Kabupaten Magelang. Sampel penelitian meliputi 300 orang guru SMP ditentu-kan dengan teknik stratified random sampling dengan memperhatikan status sekolah, kategori sekolah, jenis kelamin, tingkat pendidikan, dan usia. Hasil analisis deskriptif mengungkapkan bahwa usaha yang dilakukan oleh guru SMP dalam mencapai tujuan berada dalam kategori cukup (rerata = 61,66); kemampuan berada pada kategori cukup (rerata = 43,02); persepsi terhadap tugas berada pada kategori tinggi (rerata = 50,84); dan kinerja berada pada kategori cukup (rerata = 73,61). Hasil analisis korelasi parsial menunjukkan usaha mencapai tujuan memberikan sumbangan yang positif dan sangat signifikan sebesar 2,781% terhadap kinerja; kemampuan memberikan sumbangan positif dan sangat signifikan sebesar 5,828% terhadap kinerja; sedangkan persepsi tugas memberikan sumbangan positif dan sangat signifikan sebesar 3,190% terhadap kinerja. Hasil analisis regresi ganda mengungkapkan adanya sumbangan positif dan sangat signifikan antara usaha mencapai tujuan, kemampuan, dan persepsi tugas secara bersama-sama sebesar 11,802% terhadap kinerja guru SMP di Kabupaten Magelang. Kata kunci: faktor-faktor kinerja guru SMP
Motor imagery EEG classification with optimal subset of wavelet based common spatial pattern and kernel extreme learning machine

Performance of motor imagery based brain-computer interfaces (MI BCIs) greatly depends on how to extract the features. Various versions of filter-bank based common spatial pattern have been proposed and used in MI BCIs. Filter-bank based common spatial pattern has more number of features compared with original common spatial pattern. As the number of features increases, the MI BCIs using filter-bank based common spatial pattern can face overfitting problems. In this study, we used eigenvector centrality feature selection method, wavelet packet decomposition common spatial pattern, and kernel extreme learning machine to improve the performance of MI BCIs and avoid overfitting problems. Furthermore, the computational speed was improved by using kernel extreme learning machine.
Evaluation of the Anti-HER2 C6.5 Diabody as a PET Radiotracer to Monitor HER2 status and Predict Response to Trastuzumab Treatment

Purpose: The rapid tumor targeting and pharmacokinetic properties of engineered antibodies make them potentially suitable for use in imaging strategies to predict and monitor response to targeted therapies. This study aims to evaluate C6.5 diabody (C6.5db), a noncovalent anti-HER2 single-chain Fv dimer, as a radiotracer for predicting response to HER2-targeted therapies such as trastuzumab. Experimental Design: Immunodeficient mice bearing established HER2-positive tumor xenografts were injected with radioiodinated C6.5db and imaged by PET/CT. Radiotracer biodistribution was quantified by biopsied tumor and normal tissues. Potential competition between trastuzumab and C6.5db was examined in vitro by flow cytometry and coimmunoprecipitations. Results: Biodistribution analysis of mice bearing xenografts with varying HER2 density revealed that the tumor uptake of 125I-C6.5db correlates with HER2 tumor density. In vitro competition experiments suggest that the C6.5db targets an epitope on HER2 that is distinct from that bound by trastuzumab. Treatment of mice affected with SK-OV-3 tumor with trastuzumab for 3 days caused a 42% (P = 0.002) decrease in tumor uptake of 125I-C6.5db. This is consistent with a dramatic decrease in the tumor PET signal of 124I-C6.5db after trastuzumab treatment. Furthermore, mice affected with BT-474 tumor showed an approximately 60% decrease (P = 0.0026) in C6.5db uptake after 6 days of trastuzumab treatment. Immunohistochemistry of excised xenograft sections and in vitro flow cytometry revealed that the decreased C6.5db uptake on trastuzumab treatment is not associated with HER2 downregulation. Conclusions: These studies suggest that 124I-C6.5db–based imaging can be used to evaluate HER2 levels as a predictor of response to HER2-directed therapies. Clin Cancer Res; 17(6); 1509–20. ©2010 AACR.
Adolescent Premature Ovarian Insufficiency Following Human Papillomavirus Vaccination

Three young women who developed premature ovarian insufficiency following quadrivalent human papillomavirus (HPV) vaccination presented to a general practitioner in rural New South Wales, Australia. The unrelated girls were aged 16, 16, and 18 years at diagnosis. Each had received HPV vaccinations prior to the onset of ovarian decline. Vaccinations had been administered in different regions of the state of New South Wales and the 3 girls lived in different towns in that state. Each had been prescribed the oral contraceptive pill to treat menstrual cycle abnormalities prior to investigation and diagnosis. Vaccine research does not present an ovary histology report of tested rats but does present a testicular histology report. Enduring ovarian capacity and duration of function following vaccination is unresearched in preclinical studies, clinical and postlicensure studies. Postmarketing surveillance does not accurately represent diagnoses in adverse event notifications and can neither represent unnotified cases nor compare incident statistics with vaccine course administration rates. The potential significance of a case series of adolescents with idiopathic premature ovarian insufficiency following HPV vaccination presenting to a general practice warrants further research. Preservation of reproductive health is a primary concern in the recipient target group. Since this group includes all prepubertal and pubertal young women, demonstration of ongoing, uncompromised safety for the ovary is urgently required. This matter needs to be resolved for the purposes of population health and public vaccine confidence.
Linked Data Proﬁling Identifying the Domain of Datasets Based on Data Content and Metadata

Since the beginning of the Linked Open Data initiative, the number of published open datasets has gradually increased, but the datasets often do not contain description about content such as the dataset domain (e.g., medicine, cancer), when this information is available, it is usually coarse-grained e.g. organic-edunet contains the metadata about a collection of learning objects exposed through the Organic.Edunet portal, but it is classiﬁed as Life science . In this work we propose approaches that will provide a detailed description of existing datasets as well as linking assistance when publishing new datasets by generating detailed descriptions of the publishers dataset.
Molecular investigation of the radiation resistance of edible cyanobacterium Arthrospira sp. PCC 8005

The aim of this work was to characterize in detail the response of Arthrospira to ionizing radiation, to better understand its radiation resistance capacity. Live cells of Arthrospira sp. PCC 8005 were irradiated with 60Co gamma rays. This study is the first, showing that Arthrospira is highly tolerant to gamma rays, and can survive at least 6400 Gy (dose rate of 527 Gy h−1), which identified Arthrospira sp. PCC 8005 as a radiation resistant bacterium. Biochemical, including proteomic and transcriptomic, analysis after irradiation with 3200 or 5000 Gy showed a decline in photosystem II quantum yield, reduced carbon fixation, and reduced pigment, lipid, and secondary metabolite synthesis. Transcription of photo‐sensing and signaling pathways, and thiol‐based antioxidant systems was induced. Transcriptomics did show significant activation of ssDNA repair systems and mobile genetic elements (MGEs) at the RNA level. Surprisingly, the cells did not induce the classical antioxidant or DNA repair systems, such superoxide dismutase (SOD) enzyme and the RecA protein. Arthrospira cells lack the catalase gene and the LexA repressor. Irradiated Arthrospira cells did induce strongly a group of conserved proteins, of which the function in radiation resistance remains to be elucidated, but which are a promising novel routes to be explored. This study revealed the radiation resistance of Arthrospira, and the molecular systems involved, paving the way for its further and better exploitation.
Influence of Fatty Acid Profiles during Supercritical Transesterification of Conventional and Non-Conventional Feedstocks: A Review

In this study, the influence of fatty acids of both conventional and non-conventional oils in supercritical transesterification method has been reviewed. Literature on oils such as moringa oleifera, manketti, croton megalocarpus, palm and soybean has been reviewed to establish an understanding of the supercritical transesterification that employed methanol as alcohol. This study reveals that lower yield of methyl esters is observed when higher temperatures are employed in oils that are highly dominated with polyunsaturated fatty acids, such as manketti and croton megalocarpus. And the reason is that poly-unsaturated fatty acids that are present in the oils decompose easily at higher temperatures and thus reduce the methyl esters yield.
Neural Correlates of Psychotherapy in Anxiety and Depression: A Meta-Analysis

Several studies have used neuroimaging methods to identify neural change in brain networks associated to emotion regulation after psychotherapy of depression and anxiety. In the present work we adopted a meta-analytic technique specific to neuroimaging data to evaluate the consistence of empirical findings and assess models of therapy that have been proposed in the literature. Meta-analyses were conducted with the Activation Likelihood Estimation technique, which evaluates the overlap between foci of activation across studies. The analysis included 16 studies found in Pubmed (200 foci of activation and 193 patients). Separate meta-analyses were conducted on studies of 1) depression, post-traumatic stress disorder and panic disorder investigated with rest state metabolism (6 studies, 70 patients); 2) depression, post-traumatic stress disorder and panic disorder investigated with task-related activation studies (5 studies, 65 patients); 3) the previous studies considered jointly; and 4) phobias investigated with studies on exposure-related activation (5 studies, 57 patients). Studies on anxiety and depression gave partially consistent results for changes in the dorsomedial prefrontal cortex and in the posterior cingulated gyrus/precuneus. Several areas of change in the temporal lobes were also observed. Studies on the therapy of phobia were consistent with a reduction of activity in medial temporal areas. The cluster of change in the prefrontal cortex may refer to increased recruitment of control processes, as hypothesized by influential models of emotion regulation changes due to psychotherapy. However, not all areas associated with controlled emotion regulation were detected in the meta-analysis, while involvement of midline structures suggested changes in self-related information processing. Changes in phobia were consistent with reduced reactivity to phobic stimuli.
The Moderating Effect of Positive Emotionality on EEG Asymmetry Recorded During a Reward Processing Task

There are two components of positive affect in reward processing: anticipatory positive affect occurs before receiving a reward and indicates a desire for a stimulus, and consummatory positive affect happens after receiving a reward and indicates contentment or satisfaction. Individual differences in reward processing have been linked to aspects of personality and asymmetric activity in the frontal brain. Specifically, a pattern of greater relative left asymmetry has repeatedly been associated with approach-related tendencies. However, most of these studies have only recorded EEG at rest and little research has examined asymmetry during a task that induces anticipatory and consummatory positive affect. The current study examined whether individual differences on various measures of positive emotionality predict self-reported mood and EEG responses to a task designed to elicit responses to reward in an unselected sample of undergraduate students. Trait anticipatory positive affect significantly predicted both self-reported anticipation of a win and positive affect in response to a win during the game, over and above other measures of positive affect. Trait consummatory positive affect significantly predicted the reward potentiated asymmetry in response to a win during the slot machine game. These findings clarify patterns of asymmetry during reward processing, as well as provide affective and psychophysiological validation of the Temporal Experience of Pleasure Scale, which is used to measure trait anticipatory and consummatory positive affect.
Contextual variation and Hong Kong English

One of the decisive factors in Schneider's innovative Dynamic Model for the transition from phase 3 (nativisation) to phase 4 (endonormative stabilisation) for the case of Hong Kong English (HKE) is the parameter of local acceptance. This paper examines the attitudes of young professionals towards native vis-a-vis non-native English accents in a number of English-speaking contexts in Hong Kong by means of the verbal-guise technique, focus group discussions and a written task. The findings suggest that many of the participants have the ability to distinguish native speakers’ from non-native speakers’ accents. Although an Anglophone-centric attitude is still found to be prominent in high-stakes English-using situations, there seems to be a tendency that the less formal and more interactive the communication context, the fewer reservations the participants have about non-native accents. The correlation analysis indicates a lack of association between the participants’ perceived intelligibility and their preferred accents in nearly all of the designated contexts for the case of HKE and, thus, the paper offers explanations based on the tension between English pronunciation as economic capital and identity carrier in local people's perception. It concludes by discussing the implications of this contextual variation in pronunciation acceptance for future attitudinal studies.
Comprehension of Online Informed Consents: Can It Be Improved?

This study examined possible ways to ensure that participants provide fully informed consent for online surveys. Participants were randomly assigned to read either a traditional informed consent or one of three modified versions: enhanced (e.g., images, bullet points), consent for each key element, or a combination of these two. Those who read the combination version scored higher on a comprehension quiz, guessed at fewer questions, and were more likely to read all of the informed consent than those who received the traditional version. These findings suggest that comprehension can be improved by adopting alternatives to the traditional informed consent.
Distributed hash sketches: Scalable, efficient, and accurate cardinality estimation for distributed multisets

Counting items in a distributed system, and estimating the cardinality of multisets in particular, is important for a large variety of applications and a fundamental building block for emerging Internet-scale information systems. Examples of such applications range from optimizing query access plans in peer-to-peer data sharing, to computing the significance (rank/score) of data items in distributed information retrieval. The general formal problem addressed in this article is computing the network-wide distinct number of items with some property (e.g., distinct files with file name containing “spiderman”) where each node in the network holds an arbitrary subset, possibly overlapping the subsets of other nodes. The key requirements that a viable approach must satisfy are: (1) scalability towards very large network size, (2) efficiency regarding messaging overhead, (3) load balance of storage and access, (4) accuracy of the cardinality estimation, and (5) simplicity and easy integration in applications. This article contributes the DHS (Distributed Hash Sketches) method for this problem setting: a distributed, scalable, efficient, and accurate multiset cardinality estimator. DHS is based on hash sketches for probabilistic counting, but distributes the bits of each counter across network nodes in a judicious manner based on principles of Distributed Hash Tables, paying careful attention to fast access and aggregation as well as update costs. The article discusses various design choices, exhibiting tunable trade-offs between estimation accuracy, hop-count efficiency, and load distribution fairness. We further contribute a full-fledged, publicly available, open-source implementation of all our methods, and a comprehensive experimental evaluation for various settings.
Motivational Climates in Ten Teachers' Elementary Physical Education Classes: An Achievement Goal Theory Approach

Using achievement goal theory as a theoretical framework, in this study we identified and described motivational climates in second- and fourth-grade elementary physical education classes. Participants were 10 physical education specialists from 6 schools and their intact second- and fourth-grade classes. Videotaping of teachers (4 lessons per teacher) and teacher and student interviews and questionnaires were used for data collection. The data revealed that, for the majority of lessons at both grades, the teachers provided students with a variety of activities, made learning meaningful, recognized and evaluated students based on effort/mastery, used heterogeneous grouping, and provided sufficient practice time. All these are mastery-focused practices. The teachers, however, recognized/evaluated students in public ways more often than privately and seldom allowed students choices in their own learning, characteristics of a performance-focused climate. Taken together, the findings indicated that the motivational climate these teachers created was neither mastery nor performance focused but a blending of the 2 approaches.
Hysteretic effects of dry friction: modelling and experimental studies

In this paper, the phenomena of hysteretic behaviour of friction force observed during experiments are discussed. On the basis of experimental and theoretical analyses, we argue that such behaviour can be considered as a representation of the system dynamics. According to this approach, a classification of friction models, with respect to their sensitivity on the system motion characteristic, is introduced. General friction modelling of the phenomena accompanying dry friction and a simple yet effective approach to capture the hysteretic effect are proposed. Finally, the experimental results are compared with the numerical simulations for the proposed friction model.
Cyclin-Dependent Kinase 5 Is Amplified and Overexpressed in Pancreatic Cancer and Activated by Mutant K-Ras

Purpose: To evaluate the nature of cyclin-dependent kinase 5 (CDK5) hyperactivity in pancreatic cancer progression. Experimental Design: We used genetic, biochemical, and molecular biology methods to investigate the nature and function of overexpression of CDK5 and its activators p35 and p39 during the progression of pancreatic cancer. Results: Amplification of the CDK5 gene or either of its main activators, p35 and p39, was observed in 67% of human pancreatic ductal adenocarcinoma (PDAC). CDK5, p35, and p39 were rarely expressed in pancreatic ducts whereas more than 90% of PDACs had increased levels of CDK5 and p35. Increased levels of CDK5, p35, and p39 protein were observed in several pancreatic cancer cell lines. Inhibition of CDK5 kinase activity using a CDK5 dominant-negative mutant or the drug roscovitine significantly decreased the migration and invasion of pancreatic cancer cells in vitro. Increased CDK5 kinase activity was also observed in immortalized human pancreatic nestin-expressing (HPNE) cells expressing a mutant form of K-Ras (G12D) compared with HPNE cells expressing native K-Ras. G12D K-Ras increased cleavage of p35 to p25, a stable and greater activator of CDK5, thus implicating a role for CDK5 in early progression of PDAC. Inhibition of the signaling cascade downstream of mutant K-Ras (G12D) that involves mitogen-activated protein/extracellular signal–regulated kinase, phosphoinositide 3-kinase, or CDK5 decreased p25 protein levels. Conclusion: These results suggest that mutant K-Ras acts in concert with CDK5 and its activators to increase malignant progression, migration, and invasion of pancreatic cancer cells. Clin Cancer Res; 17(19); 6140–50. ©2011 AACR.
Solving open-ended problems, and the influence of cognitive factors on student success

Problem solving is an essential skill for undergraduate chemists to acquire. Many problem solving activities encountered on undergraduate programmes are algorithmic, and require lower order cognitive skills to be applied in order to reach a solution. We have developed a number of open-ended problems that use a real life context and require the application of higher order cognitive skills. Students cognitive style has been determined and correlated with success in solving these problems. Early indications are that there is a correlation between field independence and problem solving ability.