LLukas22/scidocs huggingface dataset:
SENSOR-LESS CONTROL OF A PERMANENT MAGNET SYNCHRONOUS MOTOR USING A NOVEL FOUR SWITCH THREE PHASE INVERTER AND EXTENDED KALMAN FILTER

Department of Electrical Engineering, University of Engineering and Technology, Lahore, Pakistan Contact: : trueusama@gmail.com mustafeezulhassan@yahoo.com abdulrahman@uet.edu.pk ABSTRACT: This paper presents the sensor-less control of a PMSM using extended Kalman Filter and a four switch three phase inverter implemented using FPGA Spartan 3-e. The system was modeled in Matlab/Simulink® and verified using experimental setup. System-Generator along with Xilinx® was used to develop control on Spartan 3-e plat form. The dynamic model of permanent magnet synchronous motor simulated in Matlab/Simulink® environment was validated and used to extract parameters for the design of extended Kalman filter. The EKF was tuned to estimate the speed and rotor position and results have been presented to ensure the performance of estimation of EKF. The estimation using EKF has reduced the parametric variation effect on speed and rotor position. The estimated parameters were used to implement the speed and current loops for vector control of PMSM using space vector pulse width modulation based four switch three phase inverter. The authentic working of this four switch three phase inverter was also checked against the usual six switch inverter. The reduction of power switches by two reduced the initial cost, switching losses and made inverter configuration compact. The complete System Generator model has been presented along with the result to demonstrate the performance of the PMSM drive using EKF based estimation on FPGA plate form.
Processing: a programming handbook for visual designers and artists

Processing: A Programming Handbook for Visual Designers and Artists With this completely revised edition, Casey Reas and Ben Fry show readers how. Processing: A Programming Handbook for Visual Designers and Artists by Ben Fry, Casey Reas, John Maeda download pdf book. Jun 28, 2010 – All right,. With Ben Fry, Reas initiated Processing in 2001. Reas and Fry published Processing: A Programming Handbook for Visual Designers and Artists, a comprehensive introduction to programming within the context of visual media (MIT Press.
A neural fuzzy based maximum power point tracker for a photovoltaic system

The global electrical energy consumption is steadily rising and therefore there is need to increase the power generation capacity. The required capacity increase can be based on renewable energy. Photovoltaic energy remains a largely unexploited renewable energy source due to low conversion efficiency of the photovoltaic modules. To maximize the power derived from the PV systems it is important to operate the panel at its optimal power point by use of a maximum power point tracker (MPPT). MPPTs find and maintain operation at the maximum power point, using an MPPT algorithm. This paper presents a high performance tracking of maximum power delivered from photovoltaic systems using adaptive neural fuzzy inference systems (ANFIS). This method combines the learning abilities of artificial neural networks and the ability of fuzzy logic to handle imprecise data. It is therefore able to handle non linear and time varying problems hence making it suitable for this work. It is expected that this method will be able to accurately track the maximum power point. This will ensure efficient use of PV systems and therefore leading to reduced cost of electricity. The performance of the proposed method was compared to that of a fuzzy logic based MPPT to demonstrate its effectiveness over other previously used MPPT techniques.
A Comparison of Learning Styles and Study Strategies Scores of Brunei Secondary School Students by Test Anxiety, Success Attributions, and Failure Attributions: Implications for Teaching At-Risk and Vulnerable Students

The survey assessed the learning styles and study strategies of 135 randomly selected Brunei secondary school students according to their test anxiety levels, internal-external attributions for success, and internal-external attributions for failing. Four significant differences were obtained on learning styles but only one was found on study strategies. Highly anxious students scored higher on the social-individual learning style than their less anxious peers. Learners who internalize success attributions scored higher on the social-group learning style than counterparts who externalize. Participants with internal attributions for failing scored higher on both the visual-language and expressive-written learning styles than those who externalize reasons for failing. Paradoxically, females were the most affected by test anxiety and yet they outperformed males in mathematics achievement. We discuss plausible explanations for these findings and suggest psychological and educational interventions to address the observed deficiencies. Further mixed-methods research is recommended to gain additional insights into the issues investigated.
Sextant-Specific Analysis of Detection and Tumor Volume by HistoScanning™.

INTRODUCTION
Published results of HistoScanning™ (HS) for prostate cancer (PCa) diagnostics are inconsistent and their value remains unclear. We prospectively analyzed the detection rate and tumor volume concordance in PCa patients.


MATERIAL AND METHODS
Two hundred and eighty-two patients with biopsy-proven PCa scheduled for radical prostatectomy (RP) were included. All patients underwent ultrasonographical examination by HS prior to surgery. HS was evaluated compared to RP specimen as to (1) the prediction of overall tumor volume and (2) accuracy of HS in detection of PCa lesions larger than 0.2/0.5 ml, separated for each sextant. For each sextant, receiver operating characteristic (ROC)-analysis and area under the curve were determined. Sensitivity and specificity were calculated and visualized in ROC-curves.


RESULTS
HS tends to underestimate volume of cancerous lesions, particularly larger lesions >8 ml. Using a 0.2 ml detection threshold, specificity and sensitivity of HS were between 29-68% and 46-78%. For a 0.5 ml detection threshold, sextant-specific specificity increased to 59-92% and sensitivity decreased to 16-54%. Stratification according to pre-operational PSA values did not improve performance characteristics of HS.


CONCLUSIONS
Our results do not support a significant contribution of HS to PCa diagnostics.
Multiple documents summarization based on evolutionary optimization algorithm

This paper proposes an optimization-based model for generic document summarization. The model generates a summary by extracting salient sentences from documents. This approach uses the sentence-to-document collection, the summary-to-document collection and the sentence-to-sentence relations to select salient sentences from given document collection and reduce redundancy in the summary. To solve the optimization problem has been created an improved differential evolution algorithm. The algorithm can adjust crossover rate adaptively according to the fitness of individuals. We implemented the proposed model on multi-document summarization task. Experiments have been performed on DUC2002 and DUC2004 data sets. The experimental results provide strong evidence that the proposed optimization-based approach is a viable method for document summarization. 2012 Elsevier Ltd. All rights reserved.
Removal of methyl red from aqueous solution by activated carbon prepared from the Annona squmosa seed by adsorption

The use of low-cost, locally available, highly efficiencient and eco-friendly adsorbents has been investigated as an ideal alternative to the current expensive methods of removing dyes from wastewater. This study investigates the potential use of activated carbon prepared from the Annona squmosa seed for the removal of methyl red (MR) dye from simulated wastewater. The effects of different system variables, adsorbent dosage, initial dye concentration, pH and contact time were investigated and optimal experimental conditions were ascertained. The results showed that as the amount of the adsorbent increased, the percentage of dye removal increased accordingly. Optimum pH value for dye adsorption was 4.0. Maximum dye was sequestered within 50 min of the start of every experiment. The adsorption of methyl red followed the pseudo-second -order rate equation and fits the Langmuir, Freundlich, Dubinin-Radushekevich (D-R) and Tempkin equations well. The maximum removal of MR was obtained at pH 4 as 82.81% for adsorbent dose of 0.2 g/ 50 mL and 25 mg L−1 initial dye concentration at room temperature. Furthermore, adsorption kinetics of MR was studied and the rate of adsorption was found to conform to pseudo-second -order kinetics with a good correlation (R2 > 0.99) with intraparticle diffusion as one of the rate determining steps. Activated carbon developed from the Annona squmosa seed can be an attractive option for dye removal from diluted industrial effluents since test reaction made on simulated dyeing wastewater showed better removal percentage of MR.
Phase III development of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire module for women undergoing breast reconstruction.

BACKGROUND
Comprehensive outcome assessments after breast reconstruction (BRR) require surgery-specific patient-reported outcome measures. The aims of this study were to assess the relevance, acceptability and redundancy of questions/items (phase III pretesting) of a new BRR questionnaire evaluating patients' health-related quality of life before and after BRR. Phase III occurred in collaboration with the European Organization for Research and Treatment of Cancer (EORTC) following earlier development phases that identified 31 items.


METHODS
The EORTC BRR subgroup applied decision-making rules to each question according to eight EORTC criteria. A total of 197 patients (from the UK, Austria, Belgium, Italy and Sweden) were recruited. Forty-seven patients completed pre- and post-BRR questionnaires prospectively, and 150 reported post-BRR questionnaires only retrospectively. Qualitative debriefing interviews were undertaken in 189 patients. Preliminary psychometric analyses were performed.


RESULTS
Thirty-one items fulfilled 'relevance', with none producing 'difficulties'. Ten items were not a priority for 10 per cent of respondents. Of these, two questions concerning muscle twitching in the affected breast and problem with donor-site swelling were deleted. Three redundant items were deleted: weakness in arm, which correlated significantly to the Quality of Life Questionnaire (QLQ) BR23 breast questionnaire, and shape and colour of the affected nipple. Descriptive statistics reduced the module to 26 items conceptualized into three provisional scales (disease treatment/surgery-related symptoms, sexuality and cosmetic outcome) within the newly completed questionnaire, EORTC QLQ-BRR26.


CONCLUSION
The QLQ-BRR26 is available for psychometric validation in a large-field international sample. The intended use for QLQ-BRR26 is alongside EORTC QLQ-C30 and QLQ-BR23, in women treated by mastectomy for breast cancer and undergoing all types of BRR.
Confinement phase transition in gluodynamics

Abstract The general mechanism of gluon confinement phase transition via variables at infinity is clarified in the 3D Fock-Schwinger gauge at finite temperature. The obtained values of critical temperature and string tension are in agreement with lattice data.
A Novel Design and Modeling Paradigm for Memristor-Based Crossbar Circuits

Over 30 years ago L. Chua proposed the existence of a new class of passive circuit elements, which he called memristors and memristive devices. The unique electrical characteristics associated with them, along with the advantages of crossbar structures, have the potential to revolutionize computing architectures. A well-defined and effective memristor model for circuit design combined with a design paradigm based on well-understood underlying logic design principles would certainly accelerate research on nanoscale circuits and systems. Toward this goal, we propose a memristor crossbar circuit design paradigm in which memristors are modeled using the quantum mechanical phenomenon of tunneling. We use this circuit model to design and simulate various logic circuit designs capable of universal computation. Finally, we develop and present a new design paradigm for memristor-based crossbar circuits.
Schemas for Narrative Generation Mined from Existing Descriptions of Plot

Computational generation of literary artifacts very often resorts to template-like schemas that can be instantiated into complex structures. With this view in mind, the present paper reviews a number of existing attempts to provide an elementary set of patterns for basic plots. An attempt is made to formulate these descriptions of possible plots in terms of character functions, an abstraction of plot-bearing elements of a story originally formulated by Vladimir Propp. These character functions act as the building blocks of the Propper system, an existing framework for computational story generation. The paper explores the set of extensions required to the original set of character functions to allow for a basic representation of the analysed schemata, and a solution for automatic generation of stories based on this formulation of the narrative schemas. This solution uncovers important insights on the relative expressive power of the representation of narrative in terms of character functions, and their impact on the generative potential of the framework is discussed. 1998 ACM Subject Classification F.4.1 Knowledge Representation Formalisms and Methods
Using the Gestalt Principle of Closure to Alleviate the Edge Crossing Problem in Graph Drawings

Graphs, generally used as data structures in computer science applications, have steadily shown a growth in mapping various types of relationships, from maps to computer networks to social networks. As graph layouts and visualizations have been at the forefront of graph drawing research for decades, it consequently led to aesthetic heuristics that not only generated better visualizations and aesthetically appealing graphs but also improved readability and understanding of the graphs. A variety of approaches examines aesthetics of nodes, edges, or graph layout, and related readability metrics. In this paper we focus on the edge crossing problem and propose a solution that incorporates Gestalt principles to improve graph aesthetics and readability. We introduce the concept of breaks in edges at edge crossings. A break is a gap in an edge drawing occurring in the vicinity of an edge crossing. At every edge crossing, one of the incident edges is broken, which will prevent any unintentional gestalts that occur at edge crossings that reduce the readability of a graph drawing. We present our preliminary results and user studies that show that this technique could play a role in improving graph readability.
Study of Gamification Effectiveness in Online e- Learning Systems

Online distance e-learning systems allow introducing innovative methods in pedagogy, along with studying their effectiveness. Assessing the system effectiveness is based on analyzing the log files to track the studying time, the number of connections, and earned game bonus points. This study is based on an example of the online application for practical foreign language speaking skills training between random users, which select the role of a teacher or a student on their own. The main features of the developed system include pre-defined synchronized teaching and learning materials displayed for both participants, along with user motivation by means of gamification. The actual percentage of successful connects between specifically unmotivated and unfamiliar with each other users was measured. The obtained result can be used for gauging the developed system success and the proposed teaching methodology in general. Keywords—elearning; gamification; marketing; monetization; viral marketing; virality
Estimating flight-level price elasticities using online airline data : A first step toward integrating pricing , demand

We estimate flight-level price elasticities using a database of online prices and seat map displays. In contrast to market-level and route-level elasticities reported in the literature, flight-level elasticities can forecast responses in demand due to day-to-day price fluctuations. Knowing how elasticities vary by flight and booking characteristics and in response to competitors’ pricing actions allows airlines to design better promotions. It also allows policy makers the ability to evaluate the impacts of proposed tax increases or time-of-day congestion pricing policies. Our elasticity results show how airlines can design optimal promotions by considering not only which departure dates should be targeted, but also which days of the week customers should be allowed to purchase. Additionally, we show how elasticities can be used by carriers to strategically match a subset of their competitors’ sale fares. Methodologically, we use an approach that corrects for price endogeneity; failure to do so results in biased estimates and incorrect pricing recommendations. Using an instrumental variable approach to address this problem we find a set of valid instruments that can be used in future studies of air travel demand. We conclude by describing how our approach contributes to the literature, by offering an approach to estimate flight-level demand elasticities that the research community needs as an input to more advanced optimization models that integrate demand forecasting, price optimization, and revenue optimization models. 2014 Elsevier Ltd. All rights reserved.
Radioimmunotherapy of prostate cancer using 90Y- and 177Lu-labeled J591 monoclonal antibodies: effect of multiple treatments on myelotoxicity.

PURPOSE
Bone marrow is the dose-limiting organ in radioimmunotherapy. Fractionated dose regimens may decrease myelotoxicity and increase greater total administered dose. We have studied the effect of two or three treatments of 177Lu-J591 and 90Y-J591 monoclonal antibodies (mAb) on myelotoxicity.


EXPERIMENTAL DESIGN
J591 is a deimmunized anti-PSMA mAb. Seven groups of patients with prostate cancer (n = 35) received 10 to 75 mCi/m2 of 177Lu-J591 and five additional groups (n = 28) received 5 to 20 mCi/m2 of 90Y-J591. Fifteen patients received two to three treatments of 177Lu-J591 (30, 45, or 60 mCi/m2) and four patients received two or three doses of 90Y-J591 (17.5 or 20 mCi/m2). Re-treatment consisted of patients receiving the same 177Lu or 90Y dose as their initial cycle. Time between treatments was 2 to 4 months.


RESULTS
The single dose maximum tolerated dose was 70 mCi/m2 with 177Lu-J591 and 17.5 mCi/m2 with 90Y-J591. With a single dose of 177Lu, no severe toxicity was observed below 60 mCi/m2. With 177Lu, two doses of 45 or 60 mCi/m2, totaling 90 to 120 mCi/m2, proved to be quite toxic. Three doses of 30 mCi/m2 (total 90 mCi/m2), however, were well tolerated. With 90Y, four patients tolerated two to three doses of 17.5 or 20 mCi/m2. Thrombocytopenia increased at higher doses and after repeat treatments. At higher doses, the nadir was lower and the time to reach nadir was longer. Time for recovery of platelets seems related to the total dose.


CONCLUSIONS
Multiple (two or three) administrations of 177Lu-J591 (30-60 mCi/m2) or 90Y-J591 (17.5 mCi/m2) over a 4- to 6-month period were tolerated by the patients with manageable thrombocytopenia. Although a single large dose may deliver optimal radiation dose to kill a larger fraction of tumor cells, fractionated therapy offers the advantage of lower myelotoxicity and prolonged tumor response. With 177Lu-J591, dose fractionation in combination with taxanes should be considered as an alternative approach to achieve optimal therapeutic efficacy in patients with prostate cancer.
Stair ascent kinematics and kinetics with a powered lower leg system following transtibial amputation.

During stair ascent (STA) persons with transtibial amputation (TTA) typically adopt a hip strategy to compensate for the limited ankle motion and joint power that is characteristic of conventional energy storing and returning (ESR) prosthetic feet. The purpose of this investigation was to determine if providing ankle power via a powered prosthetic device (BiOM) normalized STA kinematics and kinetics. Eleven individuals with TTA participated in two STA gait analysis sessions: (1) using an ESR foot, and (2) using the BiOM. Eleven height and weight matched able-bodied controls (CONT) were also assessed. Lower extremity peak kinematic and kinetic values were calculated at a self-selected and controlled cadence (80 steps/min). Increased prosthetic limb peak ankle plantarflexion and push-up power were observed while using the BiOM as compared to ESR. Peak ankle power was not significantly different between BiOM and CONT indicating normalization of ankle power generation. However, peak ankle plantarflexion was significantly lower than CONT. Limb asymmetries including greater prosthetic limb hip flexion and power during stance, and decreased prosthetic limb knee power during stance were observed in the BiOM and ESR conditions. The results suggest that the BiOM successfully increased ankle motion and restored ankle power during STA. These differences did not, however, reduce the use of a hip strategy while ascending stairs. Additional device specific training may be necessary to utilize the full benefits of the device.
Influence of time of day and month on Weddell seal haul-out patterns at the Vestfold Hills, Antarctica

A diurnal pattern in haul-out behaviour has been described for Weddell seals at McMurdo Sound, Antarctica, but regional and seasonal variations were previously unknown. Knowledge of activity patterns is important for standardising census methods and census data. This study quantified the diurnal pattern in haul-out behaviour of Weddell seals at the Vestfold Hills from October 1994 to March 1995. Sequential counts of seals on the ice showed that, between 0900 and 1930 hours, seal abundance differed up to 95%. Fewer seals were hauled out in the morning than in the afternoon. The maximum numbers of seals were hauled out at the warmest time of day. The diurnal cycle was less pronounced in the breeding season than in the moulting season. The findings indicated the importance of censusing Weddell seals after 1430 hours and before 1700 hours local time, especially in the moulting season. Correction factors are given for month and time of day.
Medial epicanthoplasty using the palpebral margin incision method.

BACKGROUND
Epicanthal deformity is one of the most frequently encountered cosmetic problems in Asian people. Herein, we introduce a new method for correction of epicanthal folds, which always is performed in combination with double eyelidplasty.


METHODS
First, through upper and lower palpebral margin incisions, we release and excise the connective and orbicularis oculi muscle dense fibres underlying the epicanthal folds, as well as the superficial head of the medial canthal ligament. After repositioning the medial canthus in a double eyelidplastic procedure, we cut off the redundant skin tissue and close the incisions.


RESULTS
82 epicanthoplasties have been performed during the past 2 years. Follow-up time ranged from 1 to 32 months. Postsurgery scars were invisible in all cases. All patients were satisfied with the results. No recurrence of the epicanthal fold was observed.


CONCLUSION
The new method introduced has advantages in avoiding scar formation and is an especially suitable approach for epicanthoplasty in Asian patients.
Rhetoric of inquiry: Projects and prospects

This essay reports the historical and philosophical reasoning behind the rhetoric of inquiry, an interdisciplinary enterprise designed to enhance the relations among the arts and sciences and clarify the actual practice of scholarship.