Miracle-dz/UniFAR-FTUs huggingface dataset:
An investigation in the voltage response and fault handling capabilities of an induction generator wind turbine on an A1 distribution network

With projected increases in green energy production, the integration of these new technologies is becoming an increasing cause for concern. As such, this thesis aims to investigate the integration of a particular wind turbine technology, or configuration, on a specific section of the local South West grid (SWIS). This thesis will focus on steady state voltage stability, transient post fault generator response, and voltage decline due to the starting of the generators. It will also compare the transient findings of this turbine configuration to that of another turbine configuration. The wind farm that is simulated will be called the type A Wind Farm, and consists of 12 Vestas V82 type A turbines. They are active stall controlled units, which connect the turbine rotor blade to the induction generator rotor via a gearbox. These are coupled with soft starters and are provided with reactive power compensation in the form of switchable capacitor banks. A step up transformer brings the generation voltage up to distribution level, which in this case is 22kV. The A1 distribution network is a specific section of grid upon which all power flow calculations take place. This is an arbitrary name given to an actual section of network due to confidentiality reasons. It has been used as it lies on the extremities of the SWIS, and will best indicate how such a wind turbine generator will impact a weaker section of grid. It is also the same network used by Fidock (2010), for his studies on a type D turbine configuration, and as such will provide a good baseline for comparisons between the two technologies. The findings of this thesis indicate that steady state operation of the type A turbine configuration produces voltages within acceptable limits. Starting of these generators can also be handled by this section of the network, however soft starters are recommended and smart operator control is essential. Due to their high reactive power draw following a network fault, it is highly recommended that turbine configurations of this construct be disconnected from the grid post fault, and reconnected after the grid has stabilized. A comparison of the two different technologies indicates that type A has much less voltage and power flow control compared to type D. The results also indicate that widespread integration of type A wind turbine generators be extremely limited, and large wind farms of this technology should not be installed on the extremities of the grid.
Wirelessly Networked Opportunistic Digital Phased Array: System Analysis and Development of a 2.4 GHz Demonstrator

Abstract : The concept of a wirelessly networked opportunistic digital phased array radar brings about the added advantages of stealth, enhanced survivability, and maximum maneuverability. The array elements are spread over a wide range of locations on the ship s hull and superstructure, and the Local Oscillator (LO) and data/control signals are wirelessly transmitted to and from a central computer processor, which also performs as the digital beamformer. As part of the ongoing research effort, this thesis focused on the hardware and software development of a 2.4 GHz two element array demonstrator. A system analysis of a generic distributed array radar was done and some key parameters pertaining to the Transmit/Receive (T/R) module and an eight-element array radar were calculated. In addition, the research analyzed the radar waveform properties, sampling and data rates, the digital beamformer concept and requirements, and assessed their impacts on the radar performance. Two Transmit/Receive (T/R) modules were built and a two-element array test bench developed using the various National Instruments Compact Reconfigurable Input and Output (cRIO) and Field Programmable Gate Array (FPGA) modules. The main software, written in LabVIEW, allowed the test bench to demonstrate the proper functionalities of transmission and reception of the T/R modules. The hardware and software code could be extended easily for an eight-element array radar. Lastly, a number of measurements to characterize the T/R module were done. No significant interference between the modulator and demodulator boards inside of the compact T/R module chassis was observed.
Training Instance Segmentation and Lane Detection Models in One Network Architecture

A new network architecture with a novel training method is proposed in this paper which can achieve two tasks of road defects instance segmentation and lane detection. It is composed of a backbone and two independent output branches for instance segmentation and lane detection. The experiments are conducted on new datasets collected by us. Through our method of alternately training two network branches while continuously reducing the learning rate, it can be found that the accuracy of our two branches can be similar with the accuracy training with two different models. This shows the effectiveness of our training method. Furthermore, our method can reduce model memory.
Associated factors with awareness, treatment and control of hypertension among 3,579 hypertensive adults in China: data from the China Health and Nutrition Survey

Background: Hypertension prevalence is high and rising in China, but it is inadequately controlled. This study investigated hypertension awareness, treatment, and control and their associated factors among Chinese adults. Methods: Data collected from the 2011 China Health and Nutrition Survey (CHNS) from 12,991 Chinese adults were used. Hypertension was defined as systolic blood pressure ≥ 140 mm Hg, diastolic blood pressure ≥ 90 mm Hg, self-reported prior diagnosed hypertension, or taking antihypertensive medications. Hypertension awareness, treatment, and control were defined as a self-reported diagnosis of hypertension, current use of antihypertensive medication, and blood pressure < 140/90 mm Hg, respectively. Multivariate logistic regression was performed to examine factors associated with hypertension awareness, treatment, and control. Results: Overall, 3,579 (27.6%) of the CHNS adult participants had hypertension, of whom 55.7% were aware of their diagnosis, 46.5% were treated with antihypertensive medications, but only 20.3% had their blood pressure controlled. Rates of hypertension awareness and treatment varied across population subgroups; higher likelihood was associated with being female (OR = 1.37; 95%CI, 1.12-1.66), older age (1.57; 1.65-4.02), urban residence (1.50; 1.14-1.97), living in the Eastern region (1.52; 1.14-2.01), having overweight/obesity (1.99; 1.39-2.84), and engaging in less healthy lifestyles. Lower control rate was associated with obesity (0.56; 0.42-0.76) and minority ethnicity (0.52; 0.31-0.86). ﻿Conclusion: Hypertension is a major public health burden in China. Rates of hypertension awareness, treatment, and control are still low despite efforts that have been made. More intensive screening and treatment intervention programs are needed in the future.
Contextualizing entrepreneurial intentions : a multiple case study on entrepreneurial cognition and perception

Avhandlingen behandlar entreprenoriella intentioner och individens uppfattningar om entreprenorskap. Om vi vill framja entreprenorskap sa racker det inte att vi forstar vilken nytta samhallet kan ha av entreprenorer (arbetsplatser, mera skatteinkomster osv.). Vi maste forsta varfor entreprenorskap ar intressant och attraktiv ur individens synvinkel. Just den fragan har varit central inom kognitiv entreprenorskapsforskning de senaste 10 aren har var forstaelse for entreprenorer okat betydligt tack vare den forskningen. Problemet med existerande forskning ar att uppfattad genomforbarhet och uppfattad attraktivitet, dvs. de attityder som sags leda till entreprenoriella intentioner, beskriver enbart vilken attityd individen generellt har till entreprenorskap. Enligt tidigare forskningsresultat sa ar det skillnad pa generella attityder till en handling och attityder till att genomfora just den handlingen. Vill vi veta om individen kan tanka sig starta och driva ett foretag sa maste vi alltsa studera individens attityd till att utfora just den specifika handlingen. Enligt avhandlingens forskningsresultat sa kan vi lara oss mera om attityder till entreprenorskap genom att studera ocksa motivation och mal. Pa sa satt kan vi forsta varfor en del valjer att bli entreprenorer medan andra valjer att lata bli, aven om de utat sett har samma mojligheter att bli entreprenorer.
Hydraulic Design of Labyrinth Weirs

This comprehensive handbook on the hydraulic design of labyrinth spillways—from theory to current practice—presents a state-of-the-art method for the effective design of labyrinth weirs. The book provides a fundamental understanding of the theory of labyrinth weirs and continues with detailed sections on significant factors that affect the discharge characteristics of labyrinth weirs, such as crest shape, weir height, and sidewall angle. The most common design curves are discussed, and from these a recommendation is developed for only one design curve to be used in future designs. But because site conditions often vary so much from ideal conditions described in this book, a section on site-specific modeling criteria is included for making accurate predictions of prototype performance. In its review of past studies, the book closely examines many long-held concepts, especially concerning the idea of interference, nappe oscillation, and the definition of which head to use in design computations, and revises them in an effort to advance current thinking based on the latest research.
Hemimetabolous insects elucidate the origin of sexual development via alternative splicing

Insects are the only animals in which sexual differentiation is controlled by sex-specific RNA splicing. The doublesex (dsx) transcription factor produces distinct male and female protein isoforms (DsxM and DsxF) under the control of the RNA splicing factor transformer (tra). tra itself is also alternatively spliced so that a functional Tra protein is only present in females; thus, DsxM is produced by default, while DsxF expression requires Tra. The sex-specific Dsx isoforms are essential for both male and female sexual differentiation. This pathway is profoundly different from the molecular mechanisms that control sex-specific development in other animal groups. In animals as different as vertebrates, nematodes, and crustaceans, sexual differentiation involves male-specific transcription of dsx-related transcription factors that are not alternatively spliced and play no role in female sexual development. To understand how the unique splicing-based mode of sexual differentiation found in insects evolved from a more ancestral transcription-based mechanism, we examined dsx and tra expression in three basal, hemimetabolous insect orders. We find that functional Tra protein is limited to females in the kissing bug Rhodnius prolixus (Hemiptera), but is present in both sexes in the louse Pediculus humanus (Phthiraptera) and the cockroach Blattella germanica (Blattodea). Although alternatively spliced dsx isoforms are seen in all these insects, they are sex-specific in the cockroach and the kissing bug but not in the louse. In B. germanica, RNAi experiments show that dsx is necessary for male, but not female, sexual differentiation, while tra controls female development via a dsx-independent pathway. Our results suggest that the distinctive insect mechanism based on the tra-dsx splicing cascade evolved in a gradual, mosaic process: sex-specific splicing of dsx predates its role in female sexual differentiation, while the role of tra in regulating dsx splicing and in sexual development more generally predates sex-specific expression of the Tra protein. We present a model where the canonical tra-dsx axis originated via merger between expanding dsx function (from males to both sexes) and narrowing tra function (from a general splicing factor to the dedicated regulator of dsx).
Determining the effectiveness of web-based distance education in mitigating the rural-urban achievement gap

This study was designed to understand how the delivery method of web-based distance courses compares to that used in classroom-based courses and to determine whether students in web-based distance courses perform on par with those in classroom-based courses, if given the same contexts. Until this is more fully understood, any differences in achievement levels between web-based distance courses and classroom-based courses will be poorly understood, leaving the potential that future decision-making will be based on simplistic notions related to any existing differences. It is the intent of this study to compare student achievement between web-based distance and classroom-based courses with particular focus on determining the effectiveness of web-based distance education in lessening the rural-urban achievement gap. -- The data for this study came from the Department of Education, Newfoundland and Labrador and the Center for Distance Learning and Innovation, Newfoundland and Labrador. I studied two cohorts of high school chemistry and physics students who completed Level II and Level III science courses between September 2002 and June 2005. These students were categorized into four groups based on locality (rural or urban) and course delivery method (classroom-based or web-based). The categories were as follows: (1) urban students who enrolled only in classroom-based chemistry and physics courses, (2) rural students who enrolled only in classroom-based chemistry and physics courses, (3) rural students who enrolled in Level II classroom-based chemistry and physics courses and Level III web-based chemistry and physics courses, and (4) rural students who enrolled only in web-based chemistry and physics courses. A repeated measures general linear model was used to predict students' achievement in the Level II and Level III chemistry and physics courses in each of the above noted categories. -- The main finding from this analysis was that there were no achievement differences between urban students who enrolled only in classroom-based chemistry and physics courses, and rural students who enrolled only in web-based chemistry and physics courses. However, there was an achievement difference between urban and rural students who enrolled in Level III classroom-based chemistry and physics courses. Consequently, I conclude that web-based distance education chemistry and physics courses delivered through CDLI are not only as effective as the physics and chemistry courses offered in the traditional classroom-based environment, but they have the potential to overcome the achievement gap between rural and urban students that has traditionally favored the urban students.
Physical analysis of peduncles of dwarf cashew clones for consumption, processed or natural

The physical characteristics of cashew-dwarf peduncles were evaluated to later indicate the best clones for natural consumption and/or processing, considering that consumers appreciate products for their visual attractiveness. The objective of this study was to analyze peduncles of dwarf cashew clones obtained from the Genetic Improvement Program of Embrapa Agroindústria Tropical, Cruz-CE experimental area, in order to make inferences about the physical characteristics and indicate the best clones for natural consumption and/or processing. The analyzed variables were: total mass of the cashew (MT), chestnut mass (MC), peduncle mass (MP), apical diameter (DA), basal diameter (DB), length and firmness. The experiment design was a randomized complete block design with 25 treatments (clones) with 3 replications and up to 12 cashews per plot (four plants in total). The analysis of variance and the comparison of the means by the Scott and Knott test was realized. When analyzing the MT values, it was found that 100% of the clones were classified as types 4 (approximately 150 g), 5 (approximately 100 g) and 6 (approximately 150 g) cashews/tray. As for MC, there was a variation from 8.18 to 15.08 g. General averages of 95.16, 50.07 and 41.38 mm were found for the variables length, DB and DA of peduncle, respectively. It is concluded that, in general, all clones presented good characteristics; however, clone 108-6 is the preference for most consumers since it has red staining, as did the control (CCP 76). Therefore, all clones presented desirable characteristics for natural consumption and/or processing.
CMOS VLSI Design: A Circuits and Systems Perspective

For both introductory and advanced courses in VLSI design, this authoritative, comprehensive textbook is highly accessible to beginners, yet offers unparalleled breadth and depth for more experienced readers. The Fourth Edition of CMOS VLSI Design: A Circuits and Systems perspective presents broad and in-depth coverage of the entire field of modern CMOS VLSI Design. The authors draw upon extensive industry and classroom experience to introduce todays most advanced and effective chip design practices. They present extensively updated coverage of every key element of VLSI design, and illuminate the latest design challenges with 65 nm process examples. This book contains unsurpassed circuit-level coverage, as well as a rich set of problems and worked examples that provide deep practical insight to readers at all levels.
Wireless power transmission for implantable devices using inductive component of closed magnetic circuit

A mechanically flexible wireless power transmission module for implantable systems with enhanced transmission efficiency using a closed magnetic circuit (CMC) is presented. The CMC-based power transmission module consists of a primary inductor for power transmission and a secondary inductor for power reception. The CMC is fabricated by electroplating the Permalloy, composed of 81% nickel and 19% iron, on the inductors. For an open magnetic circuit (OMC), the measured power transmission efficiency was 13% when the distance between the two inductors was 5%mm. However, the efficiency was enhanced to 27% and 34% for the proposed two types of CMCs.
THE EFFECT OF WRIST POSTURE AND FOREARM POSITION ON THE CONTROL CAPABILITY OF HAND-GRIP STRENGTH

Economic and industrial developments have yielded an increase in automated workplace operations; consequently, employees must learn to operate various hand tools and equipment. The hand grip strength exerted by workers during machinery operation has received increasing attention from engineers and researchers. However, research on the relationship between hand grip strength and posture—a crucial issue in ergonomics—is scant. Therefore, in this study, the relationships among wrist posture, forearm position, and hand grip strength were examined among 72 university students. Three wrist posture and forearm positions of grip span were tested to identify the maximum volitional contraction (MVC) and hand gripping control (HGC) required for certain tasks. A one-way analysis of variance was conducted using MVC and HGC as dependent variables, and the optimal wrist posture and forearm position were identified. The findings provide a reference for task and instrument design and protecting industrial workers from diseases.
REGRESSION ESTIMATION OF EVENT PROBABILITIES

Abstract : MDA (multiple discriminant analysis) has been found useful in predicting the probability of operationally critical airfield ceiling and visibility conditions. One part of the discriminant procedure requires at the outset a rather lengthy computation by machine to estimate these probabilities. While the operational use of the method takes much less effort, the time needed initially on a large scale computer may be inordinate when many elements, time periods, and geographical locations are being considered. This report discusses a prediction technique, REEP (regression estimation of event probabilities), which resulted from attempts to make MDA more efficient. Comparative studies between REEP and MDA are included as well as other experimentations performed using the REEP procedure. Recommendations for future work on the technique are also given.
Simulating the (Unilateral) Effects of Mergers: Implications of the Oracle/Peoplesoft Case

Unilateral effects analysis has been the single most important innovation in merger control driven by economic theory in recent years. In practice, this requires the use of sophisticated economic tools such as simulation models, which facilitate the quantification of short-term merger effects. In this paper, we study the application of this new device in the landmark merger case between software firms Oracle and PeopleSoft. Despite serious initial concerns the transaction was not blocked, nor even required to be modified in the EU and US. Besides some case-specific issues we highlight the fundamental problems associated with the use of sophisticated economic tools in merger control. The basic questions are: (i) What can merger simulation models actually demonstrate? (ii) What is an adequate standard of proof for their sensible use in merger review? Based on the nature of predictive economic evidence we then develop an adequate standard of proof, i.e. the evidentiary threshold that must be met for a prohibition decision. For a more general treatment we also present a simple analytical model in order to illustrate the effects of different thresholds on legal and economic quality. Finally, our recommendation is to adjust the standard of proof in the direction of a moderate threshold or, more preferably, to switch to a mixed burden of proof. Both suggestions are geared to guaranteeing the fruitful contribution of sophisticated economic evidence to case assessments and, thus, increasing decision quality.
Determinants of Low Birth Weight Infants in Mekelle Zone, Tigray Region, Northern Ethiopia- Case-Control study

Background : Low Birth Weight is a public health problem in Ethiopian. This study aimed to identify its determinant factors in Mekelle Zone, northern Ethiopia. Methods : Case control study design was employed on randomly selected 464 newborn. Baby measuring scale was used to weighing the newborn. Multivariable logistic regression was performed to identify the determinants factors, P < 0.05 and 95 % confidence level by using SPSS version 20 statistical software. Results : Maternal age <20 years (AOR = 2.9, 95 % CI: 1.55, 5.47), income < 2500 Ethiopian birr (AOR = 3.5, (95 % CI: 1.57, 7.95), gestation < 37 weeks (AOR= 4, 95% CI: 2.18, 7.29), hypertension (AOR= 2.6, 95% CI: 1.15, 6.07), anemia (AOR= 3.2, 95% CI: 1.70, 6.17), didn’t consume milk/week (AOR= 2.3, 95% CI: 1.02, 5.35), low dietary diversity (AOR = 2.8, 95% CI: 1.22, 6.19), MUAC < 23 cm (AOR = 2.1, 95% CI: 1.14, 4.04) were the identified determinants factors for low birth weight. Conclusions : Maternal age, income, history of hypertension and anemia, milk consumption, dietary diversity and maternal MUAC were the determinants Therefore, employing multisectoral coordinated intervention is essential to ending low birth weight.