Miracle-dz/UniFAR-FTUs huggingface dataset:
Tumor-Related Epilepsy and Post-Surgical Outcomes: Tertiary Hospital Experience in Saudi Arabia

Objectives: Recent studies reported that tumor histopathology plays a significant role in predicting freedom from seizures after epilepsy surgery; however, no consensus among researchers regarding this issue exists. This study retrospectively examined different types of tumor-related epilepsy and post-epilepsy surgical outcomes and the relationship between various tumor Histopathology and these outcomes. Methods: In this hospital-based retrospective study, patients with brain tumors and drug-resistant epilepsy, which is defined as the failure of two tolerated and appropriately chosen antiepileptic drugs (whether as monotherapies or in combination) to achieve and alleviate sustained seizure freedom, were recruited. These patients underwent a thorough pre-surgical evaluation in an Epilepsy Monitoring Unit (EMU) before deciding to undergo surgical intervention according to an epilepsy case management conference. Results: One-hundred patients (including 45 children) with brain tumors were included in this study (male: female = 3:2). Most of the patients (93) had G/GNT. No significant differences in outcome were observed among sex, age, or histopathological categories. However, during the first year after epilepsy surgery, most of the low-grade G/GNT cases showed favorable outcomes based on ILAE classes 1 and 2 (61.3% and 9.7%, respectively), whereas high-grade gliomas and meningothelial tumors showed outcomes of ILAE class 1 (40% and 100%, respectively). Conclusion: Post-epilepsy surgical outcomes of different brain tumors have been achieved with favorable outcomes in children and adults with low-grade gliomas and meningiomas. Thus, pre-surgical evaluation in EMU is highly recommended to enhance better post-epilepsy surgical outcomes.
Analysis of dampled sinusoidal signals via a frequency domain interpolation algorithm

An algorithm for the estimation of the parameters that characterize a damped sinusoidal signal is presented. The procedure is based on a suitable post processing of the discrete Fourier transform samples. Initially a single cisoid signal is analyzed, then the results are extended to the multiple cisoid case. Numerical simulation results show the good accuracy obtained under various measurement conditions, thus proving the reliability of the proposed method in a number of engineering applications. <<ETX>>
Analysis of the charge pumping technique and its application for the evaluation of MOSFET degradation

It is shown that the charge pumping technique is able not only to determine the degradation mechanisms in MOS transistors under all kinds of aging conditions (e.g., irradiation, hot-carrier, Fowler-Nordheim stress), but also in several cases to evaluate and to quantify the degradation. It is further shown that the technique can be applied to separate the presence of fixed oxide changes due to charge trapping and the generation of interface traps. It can be used to analyze degradations that occur uniformly over the transistor channel, as well as strongly localized transistor degradations (e.g., for the case of hot-carrier degradations). All possible cases of uniform and nonuniform degradations, for p-channel as well as for n-channel transistors, are described, and for most of them experimental examples are given. >
Modeling the Impacts of Bicycle Facilities on Work and Recreational Bike Trips in Los Angeles County, California

Metropolitan planning organizations and other planning agencies increasingly are asked to evaluate proposed bicycle facilities and to select the most promising facilities for funding. The objective was to develop models of utilitarian and recreational bicycling and to implement these models in a unified geographic information system–based framework that the Los Angeles County, California, Metropolitan Transportation Authority could use for planning purposes. Statistical models that evaluate bicycling to work and bicycling for recreation were estimated and implemented in the framework. A logistic regression model was used to estimate bicycle-to-work mode share at the level of census tracts or traffic analysis zones. Furthermore, a pair of disaggregate models was estimated to evaluate bicycle trips made for recreation. The bicycle-to-work model estimation generated parameter estimates that were consistent with previous literature and added to the literature by demonstrating the importance of well-connected and accessible bicycle networks for utilitarian bicycling. The recreational models provide a new way to estimate the impacts of bicycle facilities on leisure or fitness-based bicycle trips. Like the work trip model, the recreational bicycling models show the importance of proximity to trails and the impact of distance as a barrier to reaching the nearest trails on the decision to bicycle for recreation.
A novel high precision inertial measurement scheme and its optimization method for high-speed rotating ammunition

A novel inertial measurement unit scheme with five accelerometers and two gyros (5A2G) is proposed in this paper to achieve high precision measurement in high dynamic environment. The three channels are decoupled during the angular velocity calculation procedure to ensure the precision and efficiency. The yawing and pitching angular velocities are directly measured by gyros, while only the rolling angular velocity is inferred indirectly from the rolling angular information vector composed of rolling angular acceleration and quadratic component of rolling angular velocity. Based on the proposed scheme, the configuration ascertainment problem for acquiring the required installation parameters of accelerometers is transformed into a constraint optimization problem with the objective of minimizing the error of rolling angular information vector. A single channel rolling angular velocity calculation model is then established on the basis of the optimal configuration and the extended Kalman filter algorithm is utilized for state estimation. Simulations are implemented and results indicate that the optimal 5A2G scheme is feasible for high-speed rotating ammunition.
Analysis of Contact Stresses in Altered Tooth-Sum Spur Gearing

Contact stress between the gear teeth in mesh determines the ability of the gear to transmit the power safely. In improving the contact strength of gear teeth, profile shift is found to be the best option beyond the use of high strength materials and surface treatment techniques. This paper discusses an alternate yet simple method of improving contact strength by the way of altering the tooth-sum. Altering the tooth-sum working between a specified center distances for a given module changes the operating pressure angle and hence necessitates profile shift. Using this profile shift gears can be designed to advantage. Few cases are considered for the purpose of discussion for clear understanding of the presentation. Large volume of monographs are developed which the practicing engineers can use.
Laser applications in integrated circuit packaging

Laser processing has large potential in the packaging of integrated circuits (IC). It can be used in many applications such as laser cleaning of IC mold tools, laser deflash to remove mold flash form heat sinks and lead wires of IC packages, laser singulation of BGA and CSP, laser reflow of solder ball on GBA, laser marking on packages and on SI wafers. During the implementation of all these applications, laser parameters, material issues, throughput, yield, reliability and monitoring techniques have to b taken into account. Monitoring of laser-induced plasma and laser induced acoustic wave has been used to understand and to control the processes involved in these applications.
Analysis of the Electrical Characteristics of an Alternative Solution for the Brazilian-Amazon Transmission System

Abstract This article analyzes the electrical parameters of a 3-phase transmission line using a 280-m-high steel tower that has been proposed for the Amazon transmission system in Brazil. The height of the line conductors and the distance between them are intrinsically related to the longitudinal and transverse parameters of the line. Hence, an accurate study is carried out in order to show the electrical variations between a transmission line using the new technology and a conventional 3-phase 440-kV line, considering a wide range of frequencies and variable soil resistivity. First, a brief review of the fundamental theory of line parameters is presented. In addition, by using a digital line model, simulations are carried out in the time domain to analyze possible and critical over-voltage transients on the proposed line representation.
Unique identification of stiffness parameters for nonlinear, anisotropic textile fabrics based on full‐field measurements on a single experiment

This work discusses a hybrid experimental‐numerical framework by which the stiffness parameters for nonlinear anisotropic textile fabrics can be uniquely identified. In the experimental part, a non‐standard setup has been designed to activate the deformation modes in a free energy function describing the mechanical material behavior. As a result, one inhomogeneous deformation field is captured by means of measuring full‐field kinematics, which includes sufficient information regarding the nonlinear response for varying deformation modes and intensities. In the numerical part, the measured full‐field data are inserted into a suitable discretized model of the specimen. Reformulating the free energy function to be linear in material parameters is considered in order to enable the definition of a quadratic objective function in terms of differences of discrete internal and external forces and hence to assure the uniqueness of the parameter identification. Finally, the sensitivity of the method to noisy data is studied.
The 10 Commandments of Service System Management

There is no need to recount the statistics relating to service system growth or the frequent calls to utilize productivity as a strategic variable. These issues are well understood—services are the most rapidly growing of our economic sectors, and there is plenty of effort being devoted to studying ways of improving their productivity. What is needed, in my opinion, is a better understanding of the very nature of services themselves, and more specifically, some practical philosophy for designing the service delivery process. These two related issues can be addressed by 10 “commandments” gleaned from my 10 years of studying services, my recent research on branch banking, and a lifetime of living with services as a consumer. In order to provide some structure to an admittedly idiosyncratic list, the commandments are grouped under the following headings: The Facility, The Customer, and The Server. (In reading the list and explanations, please assume that the normal academic caveats such as “other things bein.
Measuring the effect of trade liberalisation on the consumption of non-renewable energy sources in Latin America & the Caribbean Countries

This article investigates the impact of trade openness on the consumption of fossil fuels for a panel of fourteen LAC countries over the period from 1990 to 2014. To this end, a PARDL model in unrestricted error-correction form is estimated. The results of the model regression point indicate that the impact of economic growth and elasticity of trade openness are statistically significant at the 1% level and contribute to increased consumption of fossil fuels in the LAC countries. However, the impact and elasticity of consumption of renewable energy are statistically significant at 1% and 5% levels and thus contribute to decreasing consumption of fossil fuels.
Design of log-periodic dipole antennas

The goal of the paper is to improve the log-periodic dipole antenna (LPDA) design procedure introduced by Carrel (1961). A computer-aided design technique is introduced, providing an easy-to-use design method of LPDAs. Corrections to Carrel's design contours, and new constant input resistance and truncation coefficients diagrams are presented. The influence of the feeder characteristic impedance, and dipole length-to-diameter ratio on LPDA parameters is studied. Design diagrams for LPDA's typical of HF communications are included. < >
Versatile voltage-mode universal biquad filter using the operational amplifier pole

A new multifunction voltage-mode biquad filter topology having three inputs and one output is described. The filter consists of a single operational amplifier (OA), a single capacitor, and two resistors and supports LP, BP, HP, AP and Notch filtering signals from the same topology, without requiring additional components besides being devoid of component matching constraints. The filter uses OA pole and has thereby acquired suitability for extended frequency operation. The natural angular frequency ω0 and the Q can be separately tuned. The circuit has low sensitivity figures. PSPICE simulation results are employed to verify the circuit performance.
Perception and Displays for Teleoperated Robots

In remote or teleoperational tasks involving humans and robots, various aspects of the remote display system may greatly influence the individual's interactions with the teleoperated entity. We look at the effects of display size, display orientation, and display viewpoint on several measures of operator performance, physiological state, and perceptions of the task. Overall performance is measured in terms of accuracy and completion times. Physiological state is assessed through physiological markers of arousal, specifically heart rate, pulse, and skin conductance. Operator perception of the task is measured with a collection of self reported perceptions of workload, frustration, and sense of control. Results indicate that there are significant performance-related and physiological changes in the operator due to conditions of screen size, angle, and viewpoint. Small screen size was most associated with increased workload. Results have important implications for teleoperated robot display design.
A Prediction Model for Surface Roughness in Milling Based on Projection Pursuit Regression

A novel prediction model for surface roughness based on Projection Pursuit Regression was proposed in this paper. Based on the new model, the effects of milling parameters on surface roughness in milling can be predicted, and the predicted value of surface roughness in the whole working range can be reached with the limited test data, thus the variation law of quality of machined surface following milling parameters can be obtained. Compared with the least square support vector machine, it can be revealed that on the base of the same samples, the construction speed of this Projection Pursuit Regression is 1~2 higher in order of magnitude than that of the least square support vector machine, while the prediction errors are 40 % of the latter. Thus, the prediction model based on Projection Pursuit Regression can be established fast and be forecasted in high-precision, it is suitable for prediction of surface roughness.
Models for diameter distribution and tree height in hybrid aspen plantations in southern Finland

Hybrid aspen ( L. Ã Michx.) is known with outstanding growth rate and some favourable wood characteristics, but models for stand management have not yet been prepared in northern Europe. This study introduces methods and models to predict tree dimensions, diameter at breast height (dbh) and tree height for a hybrid aspen plantation using data from repeatedly measured permanent sample plots established in clonal plantations in southern Finland. Dbh distributions using parameter recovery method for the Weibull function was used with NÃ¤slundâs height curve to model tree heights. According to the goodness-of-fit statistics of Kolmogorov-Smirnov and the Error Index, the arithmetic mean diameter () and basal area-weighted mean diameter () provided more stable parameter recovery for the Weibull distribution than the median diameter () and basal area-weighted median diameter (), while showed the best overall fit. Thus, NÃ¤slundâs height curve was modelled using with Loreyâs height (), age, basal area (), and tree dbh (Model 1). Also, Model 2 was tested using all predictors of Model 1 with the number of trees per ha (). All predictors were shown to be significant in both Models, showing slightly different behaviour. Model 1 was sensitive to the mean characteristics, and , while Model 2 was sensitive to stand density, including both and as predictors. Model 1 was considered more reasonable to apply based on our results. Consequently, the parameter recovery method using and NÃ¤slundâs models were applicable for predicting tree diameter and height.Populus tremulaP. tremuloidesDDGDMDGMDGDGHGBATPHDGHGBATPHDG
Sensitivity control to surface irregularity

The typical manufacturing errors of optical instruments are tilt, decenter, thickness error, and curvature error. The difference between these errors and the surface irregularity is the randomness of the surface irregularity. But the surface irregularity is not fully random. For example, there is a correlation between deviations on neighboring points. How much the correlation spreads determines the character of the surface irregularity. With the statistical treatment of many sample data, the surface irregularity can be expressed as a linear combination of base functions, [see manuscript for equation] where f1(x,y). fn(x,y) are base functions and a1.an are coefficients. x and y are coordinates perpendicular to the optical axis. fi(x,y) contains no randomness. ai's are random variables and independent to each other. If f1(x,y). fn(x,y) are known, the sensitivity control to deviation fi(x,y) can be performed just as a tilt. If the sensitivity to f1(x,y). fn(x,y) are small, the sensitivity to surface irregularity is promised to be small. This paper contains the proposal of a general method of the sensitivity control to manufacturing errors. The sensitivity control to the surface irregularity is an advanced application of this method. In this method the sensitivity of RMS OPD or MTF is exactly calculated based on the change of the optical path length. The sensitivity is controlled as a target of the optimization. This method is applicable to any sort of manufacturing errors and the control of the sensitivity is reliable even for the large aperture and/or wide angle lenses. In sections 2 and 3 the treatment of the randomness of the surface irregularity is explained. In sections 4 and 5 the method to calculate the sensitivity is explained. In section 6 it is shown how the sensitivity control is performed during the optimization and how effective the sensitivity control to surface irregularity is.
Thermal performance of underground power cables with constant and cyclic currents in presence of moisture migration in the surrounding soil

A numerical methodology for thermal analysis of buried power cables in presence of heat and moisture migration in the surrounding soil is presented. The governing equations are solved via a finite volume methodology and both cable and soil are incorporated in the problem formulation. The developed program is versatile and user-friendly, and was implemented in a personal computer. Results are presented for constant and cyclic loads, stressing the importance of moisture migration in power cable design.
SaaS BI: SUSTAINABLE BUSINESS INTELLIGENCE SOLUTION FOR SMB'S

In the wake of the economic slowdown, organizations are increasingly looking for ways to do more with the same resources; articulate differently - to make every penny, input and contribution count. In such situations, technologies like Cloud Computing and Business Intelligence (BI) are becoming increasingly important in gaining and maintaining a competitive edge. These technologies when combined enable a variety of new analytic data management projects and business possibilities. Cloud computing will change the economics of BI by making available the hardware, networking, security and software needed to create data marts and data warehouses on demand with a pay-as-you-go approach to usage and licensing. This paper focused on the need of BI in SMB’s. It also state the problems associated with traditional BI tools and proposed a SaaS BI model for handling the problems. Finally the paper outline the benefits of SaaS BI tools.
Thin Film Thermo-Mechanical Sensors Embedded in Metallic Structures

The embedding of thin film thermo-mechanical sensors in structures such as tools is of great interest to the manufacturing industry. We present the first results of our experiments to produce thin film thermocouples and strain sensors enclosed in metallic macroscopic structures using a layered manufacturing technique (Shape Deposition Manufacturing). The issues to be addressed are the electrical insulation of the sensors, the thermo-mechanical integrity of the resulting thin film multilayer and its compatibility with the high temperature process of embedding.
Time scales of polarization switching in different types of VCSELs

We present a study of the time-scale at which current induced polarization switching (PS) in VCSELs takes place. To this end, we measure the step and frequency response in three different types of PS VCSELs, showing that the dominating time-scales differ strongly from one VCSEL structure to another. We characterize the current-driven polarization modulation frequency response by measuring the critical modulation amplitude necessary to steadily force PS back and forth across the PS point as a function of the modulation frequency. The polarization step response is obtained by measuring the stochastic properties of the delay between the applied current step and the resulting change in the polarization, for various values of the initial and final current. For the studied proton-implanted VCSEL the polarization response is characterized by the thermal relaxation time. The measured polarization response of the air-post VCSEL also shows a clear signature of thermal effects, however PS is not at all inhibited at higher frequencies. In the oxide-confined device studied, there seems to be no thermal influence on the PS at all. Comparing the frequency response and the step response measurements done on the same device leads to similar conclusions and allows us to crosscheck our results. In all cases, we are able to reproduce our experimental findings using a rate-equation model, where PS is supposed to be induced by changes in the gain balance between the two polarization modes.
The Significance of Traditional Bullying, Cyberbullying, and Mental Health Problems for Middle School Students Feeling Unsafe in the School Environment

ABSTRACT Feeling safe in school is important for students’ learning, well-being, and quality of life. Variables possibly associated with feeling unsafe in school, such as mental health problems, traditional bullying, cyberbullying, and various health problems, were explored. Altogether, 2,028 adolescents (M age = 14 years, 50% boys) from 72 middle schools in northern Norway were respondents. Being unsafe in school resulted from a combination of lack of care provided by the student’s teacher and not feeling safe. In all, 5.7% (115) of the students reported feeling unsafe. In the final model, not feeling safe at school was significantly associated with being traditionally bullied, being a victim of cyberbullying, mental health problems including conduct, hyperactivity and peer problems, abdominal pain, and Norwegian not being the mother tongue. Feeling unsafe at school is a potential marker of several difficulties needing attention and interventions from school leaders, teachers and school health services.