bluuebunny/crossref_metadata_2025 huggingface dataset:
konsep dasar administrasi pendidikan
Authors: Zaputri Nova Sari
Published: May 2019

A.PENGERTIAN ADMINISTRASI PENDIDIKANAdministrasi dalam bahasa Indonesia, (kata Administrasi itu sendiri) Merupakan serapan dalam bahas Belanda ‘Administratie’ yang bersifat terbatas dan hanya menyangkut sebagian kecil dari pengertian yang sebenarnya. Dimaksudkan ialah ketata-usahaan yang diartikan sebagai kegiatan penyusunan keterangan-keterangan secara sistematis dan pendataan secara tertulis semua kegiatan yang diperlukan dengan maksud memperoleh suatu ikhtisar dalam keseluruhan dan dalam hubungannya yang sama. Administrasi pendidikan adalah suatu proses penyelenggaraan dan pengurusan segenap tindakan atau kegiatan dalam setiap usaha kerja sama kelompok manusia untuk mencapai tujuan tertentu. Menurut Luther Gullick yang mendefinisikan bahwa administrasi sebagai pengorganisasian dan pengarahan sumber-sumber yang berupa manusia atau tenaga kerja dan material untuk mencapai tujuan akhir yang diinginkan. Administrasi pendidikan adalah proses keseluruhan kegiatan bersama dalam bidang pendidikan yang meliputi perencanaan, pengorganisasian, pengarahan, pelaporan, pengkoordinasian, pengawasan dan pembiayaan, dengan menggunakan atau memanfaatkan fasilitas yang tersedia, baik personil, materiil, maupun spirituil untuk mencapai tujuan pendidikan secara efektif dan efisien
ARTIKEL KEPEMIMPINAN PENDIDIKAN
Authors: Nasifah Naurah
Published: May 2019

Naurah nasifah 17329186
Cathryn Li Yuan Ling
Authors: Setiawan Adib Rifqi
Published: May 2019

Human beings are full of latent potential because with discipline and perseverance, we can learn anything we put our minds to. Cathryn Li Yuan Ling is one of those people who has worked hard to learn multiple skills in order to better herself. She continues to push herself because she believes there is always room for improvement. Cathryn Li was also blessed with stunning facial features and has amassed quite a fan base. Cathryn Li is a trained classical pianist and she holds a masters degree in piano from the Birmingham Conservatory of Music in the United Kingdom. She is currently trying her hand at acting and has been featured in several movies including playing the leading role in Special Female Force, a Hong Kong blockbuster action film. With this being said, she has not forgotten about her passion for playing the piano and laments that when she is in the process of filming there leaves little time to indulge in her passion. She regularly posts snippets of her playing classical pieces on her Instagram page. It is simply mesmerizing to see how her fingers glide across the keys as she plays with such fervor. In keeping with all things elegant and classical, Cathryn also excels in ballet. She took up this demanding sport and art form when she was very young and continues to train to this day. In addition to being an outstanding pianist, ballet dancer as well as talented actress, Cathryn also reveals her passion for fitness as she regularly posts videos of her workout regimens on her Instagram page. She gradually developed her strength and posts her progress online to inspire people to do the same. Cathryn now has a meager 12% body fat and the rest of her is made up of lean muscles which she worked arduously for. Here’s to inspiring everyone to follow in her footsteps and keep working on yourself so you can be the best version of you.
Measuring motivational relationship processes in experience sampling: A reliability model for moments, days, and persons nested in couples
Authors: Schönbrodt Felix D. , Zygar-Hoffmann Caroline , Nestler Steffen , Pusch Sebastian , Hagemeyer Birk
Published: May 2019

The investigation of within-person process models, often done in experience sampling designs, requires a reliable assessment of within-person change. In this paper, we focus on dyadic intensive longitudinal designs where both partners of a couple are assessed multiple times each day across several days. We introduce a statistical model for variance decomposition based on generalizability theory (extending P. E. Shrout & S. P. Lane, 2012), which can estimate the relative proportion of variability on four hierarchical levels: moments within a day, days, persons, and couples. Based on these variance estimates, four reliability coefficients are derived: between-couples, between-persons, within-persons/between-days, and within-persons/between-moments. We apply the model to two dyadic intensive experience sampling studies (n1 = 130 persons, 5 surveys each day for 14 days, ≥ 7508 unique surveys; n2 = 508 persons, 5 surveys each day for 28 days, ≥ 47764 unique surveys). Five different scales in the domain of motivational processes and relationship quality were assessed with 2 to 5 items: State relationship satisfaction, communal motivation, and agentic motivation; the latter consists of two subscales, namely power and independence motivation. Largest variance components were on the level of persons, moments, couples, and days, where within-day variance was generally larger than between-day variance. Reliabilities ranged from .32 to .76 (couple level), .93 to .98 (person level), .61 to .88 (day level), and .28 to .72 (moment level). Scale intercorrelations reveal differential structures between and within persons, which has consequences for theory building and statistical modeling.
Modeling flexible behaviour in autism spectrum disorder and typical development
Authors: Crawley Daisy , Zhang Lei , Jones Emily J.H. , Ahmad Jumana , San Jose Caceres Antonia , Oakley Bethany , Charman Tony , Buitelaar Jan , Murphy Declan , Chatham Christopher Hughes , Ouden Hanneke den , Loth Eva
Published: May 2019

Flexible behavior is critical for everyday decision-making and has been implicated in restricted, repetitive behaviors (RRB) in autism spectrum disorder (ASD). However, how flexible behavior changes developmentally in ASD remains largely unknown. Here, we used a developmental approach and examined flexible behavior on a probabilistic reversal learning task in 572 children, adolescents and adults (ASD N=321; typical development, TD; N=251). Using computational modeling, we quantified latent variables that index mechanisms underlying perseveration and feedback sensitivity. We then assessed these variables in relation to diagnosis, developmental stage, core autism symptomatology and associated psychiatric symptoms. Autistic individuals showed on average more perseveration and less feedback sensitivity than TD individuals and, across cases and controls, older age groups showed more feedback sensitivity than younger age groups. Computational modeling revealed that dominant learning mechanisms underpinning flexible behavior differed across developmental stages and reduced flexible behavior in ASD was driven by less optimal learning on average within each age group. In autistic children, perseverative errors were positively related to anxiety symptoms, and in autistic adults, perseveration (indexed by both task errors and model parameters) was positively related to RRB. These findings provide novel insights into reduced flexible behavior in relation to clinical symptoms in ASD.
No Evidence for Enhancing Prospective Memory with Anodal Transcranial Direct Current Stimulation across Dorsolateral Prefrontal Cortex
Authors: Ellis Derek , Brewer Gene Arnold , Laboratory Memory & Attention Control
Published: May 2019

A standard finding in the event-based prospective memory literature is that focal cues are more often detected than nonfocal cues. The multiprocess view of prospective memory accounts for this result by suggesting that dorsolateral prefrontal cortex (DLPFC) mediated executive processes are necessary for nonfocal cue detection while hippocampally mediated spontaneous retrieval processes support detection of focal cues. In agreement with the multiprocess view, previous studies have found that working memory capacity is predictive of prospective memory performance through detection of nonfocal cues, but non-predictive for focal cues. Because the DLPFC is known to support working memory maintenance, we predicted that anodal transcranial direct current stimulation (tDCS) of the DLPFC would increase prospective memory cue detection for nonfocal cues when compared with a sham condition. Critically, we also expected an interaction between prospective memory cue type and stimulation such that anodal stimulation would not influence focal cue detection. Our results replicated the standard effect of improved focal compared to nonfocal cue detection. However, there was no significant effect between the sham and active tDCS conditions. Furthermore, we did not find the expected interaction between cue type and stimulation. Not only do our findings add onto the growing literature of tDCS experiments that failed to find stimulation effects to DLPFC, but it is also one of the first studies to incorporate prospective memory with tDCS.
The Language of Uncertainty and Political Ideology of News Sources in Climate Communication
Authors: Abney Drew , Gann Timothy , Huette Stephanie , Matlock Teenie
Published: May 2019

Communicating information about future events and outcomes is challenging when there is much uncertainty. This is evident in everyday discourse about climate change, including language in the popular media. What words are used to connote different degrees of certainty in varied news sources and how often do they occur? Different political ideologies vary when it comes to how they discuss issues around climate change. In this paper, we analyzed how progressive and conservative news sources express certainty when talking about climate change. We constructed a corpus of 18,906 news articles about climate change from 23 different news websites varying in political ideology. Our prediction was that if language use differs depending on the certainty represented for an issue, we should observe differences across news sources as a function of political ideology. The results show a bias in the expression of certainty, whereby progressive media show more certainty in linguistic form than do conservative media, providing insights into how language use reflects our underlying conceptual understanding of climate change. We discuss the implications of these results for conceptual models of language use and also applications to science communication.
When is it good to use wristband devices to measure HRV?: Introducing a new method for evaluating the quality of data from photophlethysmography-based HRV devices
Authors: Ryan William , Conigrave James , Basarkod Geetanjali , Ciarrochi Joseph , Sahdra Baljinder K.
Published: May 2019

Objective: Recent technological advances have led to the proliferation of ambulatory devices for non-invasively assessing cardiac activity. While these devices have exciting implications for conducting research outside the laboratory, it is critical that this increased mobility does not compromise data quality. As a test case, we assess the efficacy of Empatica’s E4, a high-end wristband device designed to assess Heart Rate Variability (HRV) through the use of photoplethysmography. Approach: We compare the E4 to traditional, wired electrocardiogram measures across a variety of conditions, including seated, supine, and standing baselines, as well as typing and grip strength tasks. Most importantly, we introduce and demonstrate the efficacy of a new method for determining the amount of error in HRV estimates derived from the E4 and a technique for adjusting error tolerance. Main Results: Results indicate that the E4 is severely compromised by motion artifact, resulting in a high percentage of missing data across all conditions except seated and supine baselines. Employing error adjustment yielded more robust results, but at the cost of significantly reducing sample size where motion artifact was present. Significance: These results call into question the wristband’s efficacy as an HRV measurement tool in most in-vivo conditions. We recommend that researchers interested in using photoplethysmography-based HRV devices use caution and evaluate the data quality using methods for error detection and tolerance, such as the one presented here.Keywords: heart rate variability, ambulatory photoplethysmography, electrocardiogram.
Children of the Twins Early Development Study (CoTEDS): A Children-of-Twins Study
Authors: Ahmadzadeh Yasmin Iona , Eley Thalia , Plomin Robert , Dale Philip , Lester Kathryn J. , Oliver Bonamy R. , McMillan Andrew , McAdams Tom
Published: May 2019

The Children of the Twins Early Development Study (CoTEDS) is a new prospective children-of-twins study in the UK, designed to investigate intergenerational associations across child developmental stages. CoTEDS will enable research on genetic and environmental factors that underpin parent-child associations, with a focus on mental-health and cognitive related traits. Through CoTEDS we will have a new lens to examine the roles that parents play in influencing child development, as well as the genetic and environmental factors that shape parenting behaviour and experiences. Recruitment is ongoing from the sample of approximately 20,000 contactable adult twins who have been enrolled in the Twins Early Development Study (TEDS) since infancy. TEDS twins are invited to register all offspring to CoTEDS at birth, with 550 children registered as of May 2019. By recruiting the second generation of TEDS participants, CoTEDS will include information on adult twins and their offspring from infancy. Parent questionnaire-based data collection is now underway for one- and two-year-old CoTEDS infants, with further waves of data collection planned. Current data collection includes the following primary constructs: child mental-health, temperament, language and cognitive development; parent mental-health and social relationships; parenting behaviours and feelings; and other socio-ecological factors. Measurement tools have been selected with reference to existing genetically-informative cohort studies, to ensure overlap in phenotypes measured at corresponding stages of development. This built-in study overlap is intended to enable replication and triangulation of future analyses across samples and research designs. Here, we summarise study protocol and measurement procedures and describe future plans.
Young children’s perceptions of ubiquitous computing and the Internet of Things
Authors: Mertala Pekka
Published: May 2019

Ubiquitous computing (ubicomp) and the Internet of things (IoT) are turning into everyday household technology at an ever‐increasing pace, for example, in the form of connected toys. However, while ubicomp and IoT are changing and shaping children’s digital and technological landscape, not much is known about how children perceive these omnipresent and concealed forms of digital technology. This qualitatively oriented paper explores 3‐ to 6‐year‐old Finnish children’s perceptions of ubicomp and IoT via interviews and a design task. Initially, the children were skeptical toward the idea that tangible objects, such as toys, could be computer and/or Internet enabled. However, these perceptions were subject to change when children were introduced to a scientific conception of what computers and the Internet are and asked to apply their knowledge to a technological design task. Implications for early years digital literacy education are discussed in the paper.
Making Identity Count: UK 2000
Authors: Grahame Alyssa Maraj , Vucetic Srdjan
Published: May 2019

The predominant discourse of British identity in year 2000 was “Adaptable Britain.” This discourse is modern, dynamic, diverse, multinational, outwardly oriented and post-imperial. It is that through which most British, elites and masses alike, thought about how to bend to seemingly inevitable changes within its borders, as well as a profound shift in the UK’s place in the world. The main challenger discourse saw Britain as traditional, imperial, and unitary. This discourse, labelled “Nostalgic Britain,” held fast to the idea that of the sun never setting on a world bequeathed by the British Empire, and was defensive and even hostile toward the idea of acquiescing to the demands of a globalized, fast-changing world. British identity in the year 2000 was also challenged by subnational identities, Scottish identity was by far the most prominent. Prepared for Ted Hopf, Bentley Allan, and Srdjan Vucetic, The Making Identity Count Project https://www.makingidentitycount.org/
Editorial Note Vol.11(1)
Authors: Sharma Indra Prasad
Published: May 2019

Not Available.
Rights Offering and Its Effect on Share Price Movement: A Study of Commercial Banks
Authors: Pathak Hari Prasad , Gupta Sweta
Published: May 2019

This paper examines the effect of rights share issue on share price movement in the banking sector covering the period 2007/08 to 2016/17. In order to find out the share price movement in different selected points of time, pre and post right issue and price relatives were calculated considering the price of 90 days before the right announcement date as the beginning index. Five different points of time were selected to observe the share price movements assuming the announcement date as the reference point of time. Stock price data were obtained from the website of NEPSE. The paper uses correlation coefficient to examine whether the overall market movement has any relationship with the individual share price change. Coefficient of determination is used to identify what proportion of the variation in the share price is explained by the event of right share issue. The result shows that right offering announcements have the signaling effect, but it is negative. The share price of Nepalese commercial banks decreases after the announcement of right in spite of the increase in the market index in the corresponding period. The results highlight the information asymmetry behavior which induces a negative change in share price after the rights announcements. The implication of the result is that investors can anticipate the nature of change in share price after rights issue announcements and develop strategic plans to improve the trading activity.
The Impact of Merger and Acquisition on Customer Satisfaction in Post- Merger Phase in Banking Sector of Nepal
Authors: Sharma Krishna Prasad
Published: May 2019

Mergers and acquisitions among financial institutions have been increased due to the introduction of merger by-law in May 2011 and capital enhancement through monetary policy of Nepal Rastra Bank in 2015. Bank and financial institutions need to be fully approachable and reactive that banking merger has not hampered customer service. Since the entire business depends on the customer’s positive feedback and satisfaction, good customer service is essential in this kind of business. It is always being argued that the impact of mergers and acquisitions on the customer is difficult to measure due to the direct influence of external factors like global competition or technological advancement. Bearing this consideration, the paper evaluates the impact of bank mergers and acquisitions on customers by using survey method. Customer satisfaction and service quality after mergers have been measured by summative scale calculated by a simple arithmetic mean and by using the weighted average method. Similarly, five point Likert-type scales have been used for measuring the satisfaction level of customer. Customers were asked to rank the various factors affecting satisfaction level on the five point scale which was further analyzed using SPSS and MS Excel. Results suggest that the merger program was successful from customers’ point of view in Nepal because it has benefited them through economies of scale, expansion of working area and advancement in technology. Another perspective regarding the service quality of banks in post-merger found that customers are enjoying competitive interest rate due to the enhanced capital base.
Customer Impulse Buying Behavior in Kathmandu
Authors: Shrestha Sajeeb Kumar
Published: May 2019

This study examines customer impulse buying behavior in Kathmandu for the retail sector. Departmental store located in Kathmandu City were approached and collected data. Judgmental sampling technique was used and data were collected from 250 samples. Descriptive statistics and multiple regression analysis were used to summarize the nature of data and to test the hypotheses. The research confirmed that window display, in-store display and promotional signage had significanct influence on impulse buying of customers. No support was found for floor merchandising.
Canadian History Hall: A Review
Authors: Walsh John C.
Published: May 2019

This review essay highlights some of the major changes introduced to the revamped Canadian History Hall at the Canadian Museum of History. It considers some of the efforts made to “Indigenize” the Hall through various museological and design elements, as well as the sustained narrative attention given to Indigenous histories, cultures, and personalities throughout all three of the galleries. The essay also identifies the visible impact made by the expanded role for historian-curators, especially a sensitivity to change over time, personality-centred storytelling, and a self-awareness of the subjectivity of all historical interpretation that was somewhat muted in the earlier iterations of the Hall. While all of this is encouraging, trying to show-and-tell too much plagues all three galleries, and in doing so the impact of the narrative is undercut. Finally, the essay suggests that the Hall ought to share more interpretive space with the wide range of source communities whose stories and material culture are on display. Acting as a facilitator and devoting resources to this end could move the Canadian History Hall closer to the ever-elusive goal of decolonizing public history and settler heritage institutions. Not only would this enrich the museum as a whole, but it could also serve as a model for other public history sites.
Failure Analysis of an Automobile Weldment
Authors: Edelglass S.
Published: May 2019

A front-wheel drive hatchback automobile was involved in a severe front end impact. Failure analysis of the automobile revealed only a single sound spot weld in each of two 66 cm (26 in.) sections of both upper and lower floor sill flanges. Consequently, upon impact, the floor pan separated from the rocker panel, buckled and rotated upward and forward. This introduced slack in the seat belts since their retractors, being anchored to the floor pan, also rotated forward. Although not contributory to the accident itself, the faulty welds were responsible in part for the severity of the injuries sustained by the driver. The faulty welds in the unit body were apparently a consequence of improper settings of parameters on a multihead electrical resistance spot welding machine. Lack of appreciation of the hazard associated with failure of this weldment may have contributed to the low frequency of their physical inspection during production. A similar case involving faulty welds in a fuel delivery truck is also discussed.
Analyzing Failures in Pistons of Racing Car Engines
Authors: Kendall E. George , Sherman Russell G.
Published: May 2019

To determine the effect of severe service on cast 357 aluminum pistons, a metallurgical evaluation was made of four pistons removed from the engine of the Hawk-Offenhauser car which had been driven by Rich Muther in the first Ontario, California 500 race. The pistons were studied by visual inspection, hardness traverses, radiography, dye penetrant inspection, chemical analysis, macrometallography, optical microscopy, and electron microscopy. The crown of one piston had a rough, crumbly deposit, which was detachable with a knife. Two pistons had remains of carbonaceous deposits. The fourth was severely hammered. It was concluded that the high temperatures developed in this engine created an environment too severe for 357 aluminum. Surfaces were so hot that the low-melting constituent melted. Then, the alloy oxidized rapidly to form Al2O3, an abrasive which further aggravated problems. The temperature in much of the piston was high enough to cause softening by overaging, lowering strength.
Fisheye Blemishes in Two Motorcycle Components
Authors: Suess S.J.
Published: May 2019

Two acrylic-coated polymeric motorcycle components exhibited fisheye blemishes after painting. SEM and EDS results showed relatively high levels of sulfur and chlorine associated with the blemishes in both parts. This suggested some adherent residual substances, possibly in the form of processing fluids and/or cleaning agents, were left on the surface just prior to painting and resulted in the observed fisheye blemishes. One of the components also showed evidence of mechanical damage, in addition to detectable iron, which suggests that the part surface may have been damaged from contact with a ferrous material, such as a steel chip.
Failure Analysis of a Set of 1CrMoV Studs From a Steam Turbine and Techniques for Its Assessment
Authors: Hickey J.J. , Bulloch J.H.
Published: May 2019

The results of a failure analysis of a series of Cr-Mo-V steel turbine studs which had experienced a service lifetime of some 50,000 h are described. It was observed that certain studs suffered complete fracture while others showed significant defects located at the first stress bearing thread. Crack extension was the result of marked creep embrittlement and reverse temper embrittlement (RTE). Selected approaches were examined to assess the effects of RTE on the material toughness of selected studs. It was observed that Auger electron microscopy results which indicated the extent of grain boundary phosphorus segregation exhibited a good relationship with ambient temperature Charpy data. The electrochemical polarization kinetic reactivation, EPR, approach, however, proved disappointing in that the overlapping scatter in the minimum current density, Ir, for an embrittled and a non-embrittled material was such that no clear decision of the toughness properties was possible by this approach. The initial results obtained from small punch testing showed good agreement with other reported data and could be related to the FATT. Indeed, this small punch test, combined with a miniature sample sampling method, represents an attractive approach to the toughness assessment of critical power plant components.
Fracture of a Core Component in a Nuclear Reactor
Authors: Rodgers D.K. , Coleman C.E. , Hosbons R.R.
Published: May 2019

This paper describes the analysis of the failure of a Zr-2.5Nb pressure tube in a CANDU reactor. The failure sequence was established as: (1) the existence of an undetected manufacturing flaw in the form of a lamination, (2) in-service development of the flaw by oxidation of the lamination, (3) delayed hydride cracking, which extended the flaw through the wall of the tube, resulting in leakage, and (4) rupture of the tube by cold pressurization while the reactor was shut down. The comprehensive failure analysis led to a remedial action plan that permitted the reactor to be returned to full-power operation and ensured a low probability of a similar occurrence for all CANDU reactors.
Failure of a Stainless Steel Power Boiler Steam Desuperheater
Authors: Chakrapani D. G.
Published: May 2019

A desuperheater diffuser nozzle in the steam supply line failed within nine months of service in an 8.25 MN/sq m (1200 psig) steam line. The nozzle was an austenitic stainless steel casting in conformance to material. The nozzle had numerous cracks on the inside and outside surfaces, and the cracks had penetrated through the wall thickness in several areas. The fracture surfaces had distinct beach markings delineating the crack front, representative of crack propagation stages. The cracks were transgranular and, unlike classical corrosion-fatigue cracks, exhibited branching, characteristic of chloride-induced SCC in austenitic stainless steels. The failure resulted from chloride-induced SCC, possibly assisted by cyclic stress. The recommendation for alternate material for the desuperheater nozzle included nickel base alloys per ASTM B 564, Grades 600 or 800 titanium alloy per ASTM B 367, Grades C3/C4, or ferritic stainless steel alloy per ASTM 182, Grade FXM27.
Cause and Prevention of Fatigue Failures in Boiler Tubing
Authors: Meiley Stephen L.
Published: May 2019

This paper reviews several fatigue failures from the waterwall, superheater, and economizer portions of the boiler, their causes and how they were mitigated and monitored. Some cases required simple field modifications by cutting or welding, repair of existing controls, and/or changes in maintenance. Nondestructive inspections by visual, magnetic particle, ultrasonic, and radiographic methods for detecting and monitoring damage are discussed. These failures are presented to provide hindsight that will help others in increasing the success rate for anticipating and analyzing the remaining life of other units.
Investigation of Fatigue-Induced Socket-Welded Joint Failures for Small-Bore Piping Used in Power Plants
Authors: Hopkins Daniel N. , Benac Daniel J.
Published: May 2019

Nuclear power plants typically experience two or three high-cycle fatigue failures of stainless steel socket-welded connections in small bore piping during each plant-year of operation. This paper discusses fatigue-induced failure in socket-welded joints and the strategy Texas Utilities Electric Company (TU Electric) has implemented in response to these failures. High-cycle fatigue is invisible to proven commercial nondestructive evaluation (NDE) methods during crack initiation and the initial phases of crack growth. Under a constant applied stress, cracks grow at accelerating rates, which means cracks extend from a detectable size to a through-wall crack in a relatively short time. When fatigue cracks grow large enough to be visible to NDE, it is likely that the component is near the end of its useful life. TU Electric has determined that an inspection program designed to detect a crack prior to the component leaking would involve frequent inspections at a given location and that the cost of the inspection program would far exceed the benefits of avoiding a leak. Instead, TU Electric locates these cracks by visually monitoring for leaks. Field experience with fatigue-induced cracks in socket-welded joints has confirmed that visual monitoring does detect cracks in a timely manner, that these cracks do not result in catastrophic failures, and that the plant can be safely shut down in spite of a leaking socket-welded joint in a small bore pipe. Historical data from TU Electric and Southwest Research Institute are presented regarding the frequency of failures, failure locations, and the potential causes. The topics addressed include 1) metallurgical and fractographic features of fatigue cracks at the weld toe and weld root; 2) factors that are associated with fatigue, such as mechanical vibration, internal pulsation, joint design, and welding workmanship; and 3) implications of a leaking crack on plant safety. TU Electric has implemented the use of modified welding techniques for the fabrication of socket-welded joints that are expected to improve their ability to tolerate fatigue.
Failure of a Coal-Pulverizer Shafts from a Generation Station
Authors: Chan P.C. , Thornley J.C.
Published: May 2019

Two vertical coal-pulverizer shafts at a coal-fired generation station failed after four to five years in service. One shaft was completely broken, and the other was unbroken but cracked at both ends. shaft material was AISI type 4340 Ni-Cr- Mo alloy steel, with a uniform hardness of approximately HRC 27. Metallographic examination of transverse sections through the surface-damaged areas adjacent to the cracks also showed additional small cracks growing at an angle of approximately 60 deg to the surface. The crack propagation mode appeared to be wholly transgranular. SEM examination revealed finely spaced striations on the crack surfaces, supporting a diagnosis of fatigue cracking. Crack initiation in the pulverizer shafts started as a result of fretting fatigue. Greater attention to lubrication was suggested, combined with asking the manufacturer to consider nitriding the splined shaft. It was suggested that the surfaces be securely clamped together and that an in-service maintenance program be initiated to ensure that the tightness of the clamping bolts was verified regularly.
Reactor Cooling Water Expansion Joint Bellows: The Role of the Seam Weld in Fatigue Crack Development
Authors: West S. L. , Nelson D. Z. , Louthan M. R.
Published: May 2019

The secondary cooling water system pressure boundary of Savannah River Site reactors includes expansion joints utilizing a thin-wall bellows. While successfully used for over thirty years, an occasional replacement has been required because of the development of small, circumferential fatigue cracks in a bellows convolute. One such crack was recently shown to have initiated from a weld heat-affected zone liquation microcrack. The crack, initially open to the outer surface of the rolled and seam welded cylindrical bellows section, was closed when cold forming of the convolutes placed the outer surface in residual compression. However, the bellows was placed in tension when installed, and the tensile stresses reopened the microcrack. This five to eight grain diameter microcrack was extended by ductile fatigue processes. Initial extension was by relatively rapid propagation through the large-grained weld metal, followed by slower extension through the fine-grained base metal. A significant through-wall crack was not developed until the crack extended into the base metal on both sides of the weld. Leakage of cooling water was subsequently detected and the bellows removed and a replacement installed.
The Corrosion of Aluminum-Clad Nuclear Fuel in Wet Basin Storage
Authors: Howell J.P. , Nelson D.Z.
Published: May 2019

Large quantities of aluminum-clad spent nuclear materials have been in interim storage in the fuel storage basins at The Savannah River Site while awaiting processing since 1989. This extended storage as a result of a moratorium on processing resulted in corrosion of the aluminum clad. Examinations of this fuel and other data from a corrosion surveillance program in the water basins have provided basic insight into the corrosion process and have resulted in improvements in the storage facilities and basin operations. Since these improvements were implemented, there has been no new initiation of pitting observed since 1993. This paper describes the corrosion of spent fuel and the metallographic examination of Mark 31A target slugs removed from the K-basin storage pool after 5 years of storage. It discusses the SRS Corrosion Surveillance Program and the improvements made to the storage facilities which have mitigated new corrosion in the basins.
Inspection and Analysis of Aluminium Racks in Spent Fuel Storage Basins
Authors: Howell J.P. , Nelson D.Z.
Published: May 2019

Aluminum-clad spent nuclear fuel is stored in water filled basins at the Savannah River Site awaiting processing or other disposition. After more than 35 years of service underwater, the aluminum storage racks that position the fuel bundles in the basin were replaced. During the removal of the racks from the basin, a failure occurred in one of the racks and the Savannah River Technology Center was asked to investigate. This paper presents the results of the failure analysis and provides a discussion of the effects of corrosion on the structural integrity of the storage racks.
Damaged Copper Hot Water Pipe
Authors: Kauczor Egon
Published: May 2019

In a copper hot water system, a bent pipe was soldered into a straight pipe with twice the diameter. The neighborhood of the soldered joint was covered with corrosion product predominantly blue-green in color, presumably carbonates. When these corrosion products were scratched off it was seen that the copper beneath this layer had not suffered noticeable attack. The object of the examination was the localized deep cavities located almost symmetrically to both sides of the inserted end of the narrower tube on the internal wall of the wider tube which had in one place been eaten right through. The symmetrical location on each side of the point of insertion of the narrower pipe and the localized sharp delineation of the attack indicated erosion due to the formation of turbulence. By avoiding sharp transitions and abrupt changes in cross section it is possible to design the pipe work so that localized turbulence is obviated. Degassing and cleansing of the water also would reduce the danger of erosion particularly in the case of softened water, which takes up oxygen and carbon dioxide very readily thus becoming particularly aggressive.
Working Roll with Shell-Shaped Fractures
Authors: Naumann Friedrich Karl , Spies Ferdinand
Published: May 2019

A working roll of 210 mm diam and 500 mm face length was examined because of shell-shaped fractures. The roll consisted of Fe-0.83C-1.6Cr steel. The chromium content was low for a roll of this diam. The crack origin was located about 10 mm under the roil face. Surface hardness (HV1) of 900 kp/sq mm was exceptionally high corresponding to the martensitic peripheral structure. An untempered piece with such a thick cross section and a hardened peripheral zone with such high hardness must have high residual stresses that culminate in the transition zone. Therefore it must be very sensitive against additional stresses, be these of a mechanical or thermal nature. This contributed to the fragmenting of the roll face.
Discoloration of Furnace Insulation
Authors: Suess S.J.
Published: May 2019

Several glass wool insulation sections from a heat-treat furnace showed visible, but only cosmetic discoloration. EDS showed the presence of silicon, aluminum, and oxygen in the nondiscolored region, and these elements are consistent with glass wool. Relatively high levels of chromium and nickel were detected in the discolored area, along with lower amounts of iron, manganese, sodium, calcium, cobalt, and sulfur, in addition to the surrounding glass wool elements. Results of this limited evaluation showed the discoloration was caused by the presence of elevated levels of chromium, nickel, and aluminum. The visual appearance, along with the EDS findings, suggested these elements were present in the form of oxides. These oxides were likely deposited from adjacent structural components of the furnace, which had oxidized during operation.
Comparison of a Classifier Performance Testing Methods: Support Vector Machine Classifier on Mammogram Images Classification
Authors: Abbas Thekra Hayder , Mohammed Sura Jasim
Published: May 2019

This paper compares between testing performance methods of classifier algorithm on a standard database of mammogram images. Mammographic interchange society dataset (MIAS) is used in this work. For classifying these images tumors a multiclass support vector machine (SVM) classifier is used. Evaluating this classifier accuracy for classifying the mammogram tumors into the malignant, benign or normal case is done using two evaluating classifier methods that are a hold-out method and one of the cross-validation methods. Then selecting the better test method depending on the obtained classifier accuracy and the running time consumed with each method. The classifier accuracy, training time and the classification time are considered for comparison purpose
Novel radiographic parameters for the assessment of total body sagittal alignment in adult spinal deformity patients
Authors: Kim Yong-Chan , Cui Ji Hao , Kim Ki-Tack , Park Gyu-Taek , Lee Keun-Ho , Kim Sung-Min , Lenke Lawrence G.
Published: May 2019

OBJECTIVE

In this study, the authors’ goal was to develop and validate novel radiographic parameters that better describe total body sagittal alignment (TBSA).

METHODS

One hundred sixty-six consecutive operative spinal deformity patients were evaluated using full-body stereoradiographic imaging. Seven TBSA parameters were measured and then correlated to 6 commonly used spinopelvic measurements. TBSA measures consisted of 4 distance measures relating the cranial center of mass (CCOM) to the sacrum, hips, knees, and ankles, and 3 angular measures relating the CCOM to the hips, knees, and ankles. Furthermore, each TBSA parameter was correlated to patient-reported outcome (PRO) scores using the Oswestry Disability Index (ODI) and Scoliosis Research Society–22 (SRS-22) instruments. Thirty patients were randomly selected for inter- and intraobserver reliability testing of the TBSA parameters using intraclass correlation coefficients (ICCs).

RESULTS

All TBSA radiographic parameters demonstrated strong linear correlation with the currently accepted primary measure of sagittal balance, the C7 sagittal vertical axis (r = 0.55–0.96, p < 0.001). Moreover, 5 of 7 TBSA measures correlated strongly with ODI and SRS-22 total scores (r = 0.42–0.51, p < 0.001). Inter- and intraobserver reliability for all TBSA measures was good to excellent (interrater ICC = 0.70–0.98, intrarater ICC = 0.77–1.0).

CONCLUSIONS

In spine deformity patients, novel TBSA radiographic parameters correlated well with PROs and with currently utilized spinal sagittal measurements. Inter- and intrarater reliability was high for these novel parameters. This is the first study to propose a reliable method for measuring head-to-toe global spinal alignment.
TINDAK PIDANA PENYALAHGUNAAN NARKOTIKA OLEH MASYARAKAT KABUPATEN SINTANG PADA TAHUN 2016 DAN 2017
Authors: Hartini Agnesia , Sukma Rio
Published: May 2019

Dilatarbelakangi oleh kekhawatiran dan keresahan dari masyarakat terhadap perkembangan tindak pidana penyalahgunaan narkotika yang semakin meningkat. Tujuan penelitian ini adalah untuk mengetahui tindak pidana penyalahgunaan narkotika di Kabupaten Sintang. Hasil penelitian pada tahun 2016-2017 sebanyak 53 kasus. Pada tahun 2016 terdapat 47 kasus terdiri atas 39 laki-laki dan 8 perempuan. Kemudian menurun pada tahun 2017 menjadi 30 kasus terdiri atas 25 laki-laki dan 5 perempuan. Adapun faktor penyebab penyalahgunaan narkotika oleh masyarakat di Kabupaten Sintang terdiri atas faktor internal yaitu kepribadian, rasa ingin tahu dan keinginan untuk mencoba dan faktor eksternal yaitu lingkungan keluarga, masyarakat, pergaulan dan ekonomi. Upaya yang dilakukan dengan melakukan penyuluhan, sosialisasi, pendekatan pada keluarga, dan penyebaran pengetahuan mengenai bahaya narkoba. Kendala yang dihadapi dalam menanggulangi penyalahgunaan narkotika yang dilakukan oleh masyarakat di Kabupaten Sintang yaitu keterbatasan dana, alat yang memadai untuk mendukung penyidik untuk mengungkap kasus narkoba, kurangnya sumber daya penyidik, sulitnya melakukan sosialisasi kepada masyarakat serta kesadaran pengguna itu sendiri. Kemudian kurang aktifnya masyarakat untuk melaporkan tindak penyalahgunaan narkotika di lingkungan sekitar dan keluarga yang terkesan menutupi. Kata kunci : Tindak Pidana, Penyalahgunaan Narkotika
NASIONALISME DALAM KEARIFAN LOKAL PADA PERKAWINAN ADAT SUKU DAYAK KEBAHAN DI DESA MAPAN JAYA
Authors: Mardawani Mardawani , Jaya Muisan
Published: May 2019

Penelitian ini mengkaji tentang Nasionalisme dalam Kearifan Lokal pada Upacara Perkawinan Adat Suku Dayak Kebahan di Desa Mapan Jaya. Tujuan dari penelitian adalah ingin mengkaji lebih mendalam tentang nasionalisme yang terdapat pada upacara adat perekawinan suku Dayak Kebahan di Desa Mapan Jaya. Seharusnya rasa nasionalisme yang ada pada upacara dan adat istiadat di Indonesia  tetap terpelihara sebagai upaya pelestarian budaya kearifan lokal yang ada. Metode yang digunakan dalam penelitian ini deskriptif kualitatif dan bentuk penelitian studi fenomenologis. Teknik pengumpulan data menggunakan teknik observasi, wawancara, dan dokumentasi. Hasil penelitian ini menunjukan bahwa: 1) terdapat nilai-nilai nasionalisme pada uapacara perkawinan adat suku Dayak Kebahan di  Desa Mapan Jaya, 2) Di era modern saat ini upacara perkawinan adat Suku Dayak Kebahan di Desa Mapan Jaya masih dilaksanakan oleh sebagian masyarakat, terutama mereka yang mampu secara ekonomi, dan 3) Terdapat  upaya yang dilakukan untuk melestarikan kearifan lokal perkawinan adat yaitu dengan mengajak seluruh masyarakat Desa Mapan Jaya untuk melaksanakan dan tidak meninggalkan perkawinan adat yang ada di Desa Mapan Jaya dan memberikan semacam kebijakan khusus bahwa bagi yang tidak mampu ada bagian dari adat yang tidak perlu dibayar. Kata Kunci: Nasionalisme, Kearifan Lokal, Perkawinan Adat.
Revisión de criterios de la didáctica jurídica, para transformar el ejercicio de la docencia universitaria
Authors: Solarte Benavides Paula Geovanna
Published: May 2019

El presente artículo de investigación tiene génesis en el marco teórico de la propuesta investigativa denominada “Concepciones teóricas y Desarrollo práctico de la Didáctica de los programas de Derecho en las universidades privadas del departamento de Nariño”, cuyo objetivo general fue analizar las concepciones teóricas y el desarrollo práctico de la didáctica de los docentes de los programas de Derecho en las universidad privadas del departamento de Nariño, y como objetivos específicos, inicialmente identificar las concepciones teóricas de la didáctica de estos docentes, caracterizar el proceso didáctico presente en la práctica pedagógica del aula y, posteriormente, establecer los aciertos, vacíos y debilidades en el proceso didáctico del aula, para finalmente proponer alternativas didácticas en el proceso de enseñanza, aprendizaje y evaluación de los programas de Derecho en las universidades del departamento de Nariño. La metodología estuvo dentro de un enfoque cualitativo, enmarcada dentro del paradigma hermenéutico-descriptivo. Dentro de los resultados obtenidos se espera generar procesos de reflexión entre los docentes, e iniciar con ellos la adopción de alternativas didácticas que complementen el ejercicio profesional de la abogacía.
KA³. Weiterentwicklung von Sprachtechnologien im Kontext der Oral History
Authors: Köhler Joachim , Gref Michael , Leh Almut
Published: May 2019

Dieser Beitrag beleuchtet die Möglichkeiten und die Herausforderungen der Audio Mining-Technologie für die automatisierte Transkription von Oral History-Interviews. Durch die erheblichen Fortschritte in der Spracherkennung deutet sich ein sinnvoller Einsatz der Technologie in den Geisteswissenschaften zur Transkription von Interviews an. Dies eröffnet eine Reihe von Perspektiven für die interviewbasierte Forschung. Erstens lassen sich aufwendige und kostenintensive Transkriptionsarbeiten reduzieren, zweitens ist die Tonspur auf Wortebene direkt mit dem Transkript verbunden und über eine Suchanwendung zugänglich, drittens können weitaus größere Mengen an Interviews recherchiert und ausgewertet werden. Auf der anderen Seite stellen Oral History-Interviews, vor allem ältere Aufnahmen, hinsichtlich Aufnahmequalität und spontaner sowie dialektaler Sprechweisen eine erhebliche Herausforderung dar, so dass aktuell Forschungsarbeiten notwendig sind, um die Leistungsfähigkeit der Spracherkennung auf notwendige Qualität zu heben. Diese Forschungs- und Entwicklungsarbeiten sind Gegenstand des vom BMBF geförderten Projektes KA³ (Kölner Zentrum Analyse und Archivierung von AV-Daten). Dieser Beitrag gibt eine Übersicht über die eingesetzten Technologien zur Sprachanalyse, die Funktionsweise des Fraunhofer IAIS Audio Mining-Systems, das Oral History-Archiv „Deutsches Gedächtnis“ der FernUniversität in Hagen, die aktuell erzielten Ergebnisse sowie aktuelle Forschungsansätze zur Verbesserung des Systems.
The isometry degree of a computable copy of ℓp
Authors: McNicholl Timothy H. , Stull Donald M.
Published: May 2019

When p is a computable real so that [Formula: see text], we define the isometry degree of a computable presentation of [Formula: see text] to be the least powerful Turing degree d by which it is d-computably isometrically isomorphic to the standard presentation of [Formula: see text]. We show that this degree always exists and that when [Formula: see text] these degrees are precisely the c.e. degrees.