bluuebunny/crossref_metadata_2025 huggingface dataset:
A dataset for examining trends in publication of new Australian insects
Authors: Mesibov Robert
Published: July 2014

Australian Faunal Directory data were used to create a new, publicly available dataset, nai50, which lists 18318 species and subspecies names for Australian insects described in the period 1961–2010, together with associated publishing data. The number of taxonomic publications introducing the new names varied little around a long-term average of 70 per year, with ca 420 new names published per year during the 30-year period 1981–2010. Within this stable pattern there were steady increases in multi-authored and 'Smith in Jones and Smith' names, and a decline in publication of names in entomology journals and books. For taxonomic works published in Australia, a publications peak around 1990 reflected increases in museum, scientific society and government agency publishing, but a subsequent decline is largely explained by a steep drop in the number of papers on insect taxonomy published by Australia's national science agency, CSIRO.
Calibration and Validation of the 2WIN Photoscreener Compared to the PlusoptiX S12 and the SPOT
Authors: Kirk Stephanie , Armitage M. Diane , Dunn Shelley , Arnold Robert W.
Published: July 2014

Purpose:

Pediatricians are interested in the amblyopia detection ability of photoscreeners, whereas ophthalmologists ponder their value as autorefractors. The 2WIN (Adaptica, Padova, Italy) is a new device capable of estimating refractive error and ocular alignment by infrared photoscreening.

Methods:

Sequential pediatric eye patients with a high (56% to 60%) prescreening prevalence of amblyopia risk factors were screened with the PlusoptiX S12 (PlusoptiX, Inc., Atlanta, GA), SPOT (PediaVision, Lake Mary, FL), and 2WIN photoscreeners before confirmatory examination adhering to American Association for Pediatric Ophthalmology and Strabismus guidelines and Alaska Blind Child Discovery institutional review board protocol. Instrument referral guidelines determined through phase 1 comparison was then applied on additional patients for validation in phase 2.

Results:

Sixty-two children (age: 1 to 10 years, mean: 5.2 years) were screened with all three devices before cycloplegic examination. Refractive results were inconclusive due to pupil size, cooperation, and out-of-range values. Values for sensitivity (91% and 78%), specificity (71% and 59%), and inconclusive rate (10% and 13%) were found for PlusoptiX and SPOT. The 2WIN was calibrated for this age range (phase 1), yielding 71% sensitivity, 67% specificity, and a 5% inconclusive rate. Regression compared to examination for the PlusoptiX, SPOT, and 2WIN, respectively, were sphere (
r
2
: 0.76, 0.87, and 0.58), cylinder power (
r
2
: 0.67, 0.56, and 0.50), and cylinder axis (
r
2
: 0.71, 0.41, and 0.40). A preferred 2WIN instrument criteria set was determined from the receiver operating characteristic curve. In phase 2, with 117 patients comparing 2WIN to PlusoptiX A-09, sensitivity was 73% and 85%, specificity was 76% and 73%, and inconclusive rate was 8% and 12%, respectively. The three instant-interpreting photorefractors performed well on amblyopic children, with the 2WIN having low inconclusive results. The PlusoptiX outperformed the SPOT and 2WIN as an autorefractor, particularly with respect to astigmatism power and axis.

Conclusions:

The new 2WIN is a promising addition to portable photoscreeners for amblyopia detection and estimating refractive error.

[J Pediatr Ophthalmol Strabismus 2014;51(5):289–292.]
"Glasba za rabo" kot družbenozgodovinski pojav v drugi polovici 19. stoletja na Slovenskem
Authors: Cigoj Krstulović Nataša
Published: July 2014

Institucionalno podprta, uveljavljena in množično razširjena glasba, t. i. »glasba za rabo«, je imela na Slovenskem v drugi polovici 19. stoletja hibriden značaj. V vseh ozirih preprosta glasba »v ljudskem duhu« je bila ponavljajoč vsebinski in oblikovni vzorec, ki je bil posledica zunajglasbenih dejavnikov in pomanjkljive glasbene izobrazbe. Ključna pri priznavanju meril njene uporabne vrednosti je bila recepcija. V oziru razumevanja normativnega pomena uporabne vrednosti se kažejo ključni etnični, zgodovinski, socialni vzročniki, med katerimi sta bili sredi 19. stoletja v ospredju konservativna, družabno-patriarhalna kulturna politika in socialna nediferenciranost.
Kritike zbora Glasbene matice v luči njegovega mednarodnega delovanja
Authors: Faganel Tomaž
Published: July 2014

Sporedi koncertov zbora Glasbene matice doma in v tujini in odmevi nanje ne morejo pokazati vrednostne sodbe, s katero bi danes ocenili umetniško moč tega ansambla. Poročila in kritike koncertov in turnej vsebujejo premalo glasbeno-strokovnih in nedvoumnih sodb, predvsem ne ocen, ki bi bile osvobojene poudarjenih občitkov poustvarjalne samopotrditve in kulturnega samozavedanja.
The motets of Jacob Handl in inter-confessional Silesian liturgical practice
Authors: Jeż Tomasz
Published: July 2014

Numerous works by Jacob Handl – Gallus, especially manuscripts dating from before his music was printed in Prague, are connected with certain Silesian towns where he spent time in his youth. These compositions clearly reflect liturgical practice of the time. Thanks to characteristics of the composer’s style they fell into into a category of “classic” repertory that was much valued in the liturgical practice of the period in Silesia, in Catholic as well as in Protestant circles. Handl’s motets found many uses, and because of their popularity came to form a cornerstone of the institutionally accepted Renaissance repertory of figural music.
»Pojoča cerkev v samoti«: kartuzijani in njihova glasba
Authors: Šter Katarina
Published: July 2014

Kartuzijanski red se v svoji dolgi zgodovini odlikuje po dejstvu, da ni nikoli doživel večje reforme in da je kljub dopolnitvam ves čas ostajal zvest načelomConsuetudines (Običajev) priorja Guiga. Članek na kratko oriše zgodovino reda in nekatere značilnosti kartuzijanske liturgije, ustavi pa se tudi ob vlogi in pomenu gregorijanskega korala, ki je vse do danes ostal njihova liturgična glasba.
“Servitore affetionatissimo Fra Gabriello Puliti” and the dedicatees of his published music works (1600–1635)
Authors: Kokole Metoda
Published: July 2014

Gabriello Puliti (c. 1583–1644) composed at least 36 musical works of which survived less than one half. The contents of 16 musical works and 15 preserved letters of dedication were analysed in an attempt to reconstruct the network of Puliti’s religious, cultural, musical, and other connections. Through his dedications the composer sought not so much financial gain as protection in all daily and professional activities.
Die Notation des Millstätter Sakramentars
Authors: Engels Stefan
Published: July 2014

A scrutinized examination of several folios from the Sacramentary of Millstatt (Carinthia, Austria) has revealed that the notation of this manuscript, too, makes use of the additional special neumatic signs denoting the position of the semitone. Similarly to other south-German neumatic manuscripts of the 12th and 13th century, whose notation shows a clear tendency to be more specific as for the exact intervals of the written melody, the semitone is signalled in the Sacramentary by episemas (attached to other signs), by tractuli (substituting puncta) and the oriscus.
Peregrini pro Christo: the Irish church in medieval Europe as reflected in liturgical sources for the veneration of its missionary saints
Authors: Buckley Ann
Published: July 2014

The Irish saints, many of whom were important figures in continental-European ecclesiastical and cultural history, figure prominently in European liturgical manuscripts. According to a research (still in progress), they make their appearance in more than 300 medieval manuscripts from nearly all the European countries. In many cases, the feasts of the Irish saints were celebrated by proper newly composed offices, which include, as far as is known, more than 150 proper chants.
The Gift of Volunteering and the Virtues of Self-Love: An Anthropological Perspective
Authors: Puckering Jo
Published: July 2014

This article outlines some of the intellectual, social and political relationships between contemporary interpretations of gift exchange and volunteering in Higher Education. It questions often dichotomous ways of understanding volunteering as altruistic or self-interested, explores changing uses and expectations of volunteering in Western society, and considers the rhetoric and realities of volunteer support, motives and experiences, in relation to institutional priorities and drivers.
***
Članek oriše intelektualna, družbena in politična razmerja na primeru sodobnih interpretacij menjave darov in prostovoljstva v visokošolskem sistemu. Prevprašuje mnogokrat dihotomne načine razumevanja prostovoljstva med altruizmom in egoizmom ter raziskuje spremenljive uporabe izraza prostovoljstvo in njegovo uporabo v zahodni družbi. Upošteva tudi retoriko in udejanjenje prostovoljske podpore, motive in izkušnje, predvsem v razmerju do institucionalnih prioritet in ciljev.
Volunteering from Altruism to Otherness
Authors: Halba Bénédicte
Published: July 2014

Volunteering is no longer a marginal phenomenon. It has become a crucial issue since the beginning of the 1990s, with studies implemented at both the European and global levels to measure volunteer population and also to give a theoretical background to volunteering. The concept of volunteering includes altruism, charity, and solidarity. It is the touchstone of civil society. Being a volunteer implies creating and developing both social capital and human capital. Volunteers acquire personal, social, and professional skills. Being a volunteer also means being an active citizen; it has a specific meaning with regard to migration. The concept of “otherness” may be more significant from this perspective.
***
Prostovoljstvo ni več marginalen pojav. Že v devetdesetih letih prejšnjega stoletja je postalo osrednja tema, s katero se ukvarjajo tudi raziskave, s katerimi tako na evropski kot na svetovni ravni ugotavljajo, koliko ljudi se ukvarja s tovrstnimi dejavnostmi, sočasno pa skušajo določiti še teoretski okvir prostovoljstva. Koncept prostovoljstva sicer vključuje altruizem, dobrodelnost in solidarnost, mnogi pa ga opisujejo kot temelj civilne družbe. Biti prostovoljec namreč pomeni ustvarjati in razvijati tako socialni kot človeški kapital, poleg tega pa prostovoljci pridobivajo osebne, družbene in poklicne izkušnje. Prostovoljstvo se tesno prepleta še z aktivnim državljanstvom in ima poseben pomen v povezavi z migranti. S tega vidika je lahko zelo pomembno razumevanje koncept »drugosti«.
Dibujos anatómicos de Leonardo da Vinci y Juan de Arfe y Villafañe
Authors: Röhrl Boris
Published: July 2014

Los cuatros libros de Varia commensuración para la escultura y architectura (1585-1587) del platero y escultor Juan de Arfe y Villafañe representan un extenso compendio de las teorías y técnicas del Renacimiento italiano. Las fuentes del Libro segundo, que contiene explicaciones sistemáticas sobre la proporción de la figura humana, el esqueleto y la musculatura, aún no han sido descubiertas. La estructura didáctica y las ilustraciones son únicas en el contexto de la literatura del siglo XVI. El formato general y algunos detalles de las ilustraciones de los primeros tres capítulos parecen tener su origen en los dibujos anatómicos de Leonardo da Vinci conservados en el castillo de Windsor.
Problems in Context-Aware Semantic Computing
Authors: Nykänen Ossi Antero , Rivero Rodriguez Alejandro
Published: July 2014

Acknowledging the user context, e.g., position and activity, provides a natural way to adapt applications according to the user needs. How to actually capture and exploit context, however, is not self-evident and it is tempting to assign the related responsibilities to individual context-consuming applications. Unfortunately, this confuses the user, complicates application development and hinders context-aware semantic computing as a research discipline. In this article, we outline context-aware semantic computing research topics and the state-of-the-art mobile application development frameworks of special interest to us, acknowledging best practices for accessing and modeling sensor context. From the integrated point of view, context-aware semantic computing is demonstrated in terms of a software component called context engine. In order to better understand how theory is tied with practice, we also introduce a simple context engine prototype. Finally, we use the research background and the empirical setting to discuss the significant problems and relevant research directions in context-aware semantic processing.
Learning Physics Down a Slide: A Set of Experiments to Measure Reality Through Smartphone Sensors
Authors: Martínez Lander , Garaizar Pablo
Published: July 2014

During the last decade, the use of smartphones among teenagers in their daily life has grown significantly. Despite the efforts to use tablets in learning processes, these teenagers are often prompted to switch off their personal devices before entering a classroom. Moreover, most mobile learning applications do not take advantage of the device sensors (e.g., touchscreen, accelerometer, or gyroscope). In order to overcome this situation, we have developed Serious Physics, a free mobile app that allows using smartphones as measuring tools to conduct experiments on Physics.
Analysis of the Effect of Human Presence on a Wireless Sensor Network
Authors: Graham Ben , Tachtatzis Christos , Di Franco Fabio , Bykowski Marek , Tracey David C. , Timmons Nick F. , Morrison Jim
Published: July 2014

Wireless Sensor Networks (WSNs) are gaining an increasing industry wide adoption. However, there remain major challenges such as network dimensioning and node placement especially in Built Environment Networks (BENs). Decisions on the node placement, orientation, and the number of nodes to cover the area of interest are usually ad-hoc. Ray tracing tools are traditionally employed to predict RF signal propagation; however, such tools are primarily intended for outdoor environments. RF signal propagation varies greatly indoors due to building materials and infrastructure, obstacles, node placement, antenna orientation and human presence. Because of the complexity of signal prediction, these factors are usually ignored or given little weight when such networks are analyzed. The paper’s results show the effects of the building size and layout, building materials, human presence and mobility on the signal propagation of a BEN. Additionally, they show that antenna radiation pattern is a key factor in the RF propagation performance, and appropriate device orientation and placement can improve the network reliability. Further, the RSS facility in RF transceivers can be exploited to detect the presence and motion of humans in the environment.
Development and Evaluation of a Dataset Generator Tool for Generating Synthetic Log Files Containing Computer Attack Signatures
Authors: O’Shaughnessy Stephen , Gray Geraldine
Published: July 2014

A key requirement for experimental analysis in the areas of network intrusion and computer forensics is the availability of suitable datasets. However, the inherent security and privacy issues surrounding these disciplines have resulted in a lack of available “test-bed” datasets for testing and evaluation purposes. Typically, the datasets required in these cases are from system log files, containing traces of computer misuse. Therefore, there is obvious potential for the use of synthetically generated log files that can accurately reproduce these traces or patterns of misuse. This paper discusses the development, testing, and evaluation of a dataset generator tool, designed to produce such datasets, particularly those containing patterns of common computer attacks.
On Dependability Issues in Ambient Intelligence Systems
Authors: Cinque Marcello , Coronato Antonio , Testa Alessandro
Published: July 2014

Ambient Intelligence (AmI) is the emerging computing paradigm used to build next-generation smart environments. It provides services in a flexible, transparent, and anticipative manner, requiring minimal skills for human-computer interaction. Recently, AmI is being adapted to build smart systems to guide human activities in critical domains, such as, healthcare, ambient assisted living, and disaster recovery. However, the practical application to such domains generally calls for stringent dependability requirements, since the failure of even a single component may cause dangerous loss or hazard to people and machineries. Despite these concerns, there is still little understanding on dependability issues in Ambient Intelligent systems and on possible solutions. This paper provides an analysis of the AmI literature dealing with dependability issues and to propose an innovative architectural solution to such issues, based on the use of runtime verification techniques.
Game Theory
Authors: Coffey Aodhan L. , Ward Tomas E. , Middleton Richard H.
Published: July 2014

Designing suitable robotic controllers for automating movement-based rehabilitation therapy requires an understanding of the interaction between patient and therapist. Current approaches do not take into account the highly dynamic and interdependent nature of this relationship. A better understanding can be accomplished through framing the interaction as a problem in game theory. The main strength behind this approach is the potential to develop robotic control systems which automatically adapt to patient interaction behavior. Agents learn from experiences, and adapt their behaviors so they are better suited to their environment. As the models evolve, structures, patterns and behaviors emerge that were not explicitly programmed into the original models, but which instead surface through the agent interactions with each other and their environment. This paper advocates the use of such agent based models for analysing patient-therapist interactions with a view to designing more efficient and effective robotic controllers for automated therapeutic intervention in motor rehabilitation. The authors demonstrate in a simplified implementation the effectiveness of this approach through simulating known behavioral patterns observed in real patient-therapist interactions, such as learned dependency.
DEAL
Authors: Genitsaridi Irini , Bikakis Antonis , Antoniou Grigoris
Published: July 2014

Authorization is an open problem in Ambient Intelligence environments. The difficulty of implementing authorization policies lies in the open and dynamic nature of such environments. The information is distributed among various heterogeneous devices that collect, process, change, and share it. Previous work presented a fully distributed approach for reasoning with conflicts in ambient intelligence systems. This paper extends previous results to address authorization issues in distributed environments. First, the authors present the formal high-level authorization language DEAL to specify access control policies in open and dynamic distributed systems. DEAL has rich expressive power by supporting negative authorization, rule priorities, hierarchical category authorization, and nonmonotonic reasoning. The authors then define the language semantics through Defeasible Logic. Finally, they demonstrate the capabilities of DEAL in a use case Ambient Intelligence scenario regarding a hospital facility.
Towards a Mission-Critical Ambient Intelligent Fire Victims Assistance System
Authors: Feng Ling , Li Yuanping , Qiao Lin
Published: July 2014

While various ambient computing and intelligence techniques have been used to assist human beings in different aspects of their daily lives and work, this paper investigates potential ambient intelligence support in mission-critical scenarios such as firefighting. The paper reviews state-of-the-art ubiquitous techniques and tools assisting firefighting. Based upon these great research results, the authors then report the design and implementation of an ambient intelligent fire victims assistance application. By sensing the physical environment and occupants in a fire building, the system suggests the safest and fastest route along which the building occupants could evacuate; and when escaping from the building is not possible, the system tries to calm down and inform the trapped ones an action list. The channels to convey the guide assistance include traditional lights, speakers, and occupants’ mobile phones (if existing). The empirical experiments show that ambient intelligence in such a fire response guide can help improve the egress time performance of building occupants. The presented ambient smart fire victims’ assistance system is supposed to work at an early stage of fire in a building. As a complement of existing firefighting techniques, it still faces a number of open questions to be resolved in the future.
The Core Aspects of Search Engine Optimisation Necessary to Move up the Ranking
Authors: O’Neill Stephen , Curran Kevin
Published: July 2014

Search engine optimization (SEO) is the process of improving the visibility, volume and quality of traffic to website or a web page in search engines via the natural search results. SEO can also target other areas of a search, including image search and local search. SEO is one of many different strategies used for marketing a website but SEO has been proven the most effective. An Internet marketing campaign may drive organic search results to websites or web pages but can be involved with paid advertising on search engines. All search engines have a unique way of ranking the importance of a website. Some search engines focus on the content while others review Meta tags to identify who and what a web site’s business is. Most engines use a combination of Meta tags, content, link popularity, click popularity and longevity to determine a sites ranking. To make it even more complicated, they change their ranking policies frequently. This paper provides an overview of search engine optimisation strategies and pitfalls.
Evaluation of Transversal Competences of the Engineering Students and their Relation to the Enterprise Requirements
Authors: Sánchez de la Rosa José Luis , Miranda Silvia Alayón , González Carina Soledad
Published: July 2014

The importance of the evaluation of the transversal competences in engineering studies is explained in this chapter. Transversal competences are of great importance to enterprises that like to recruit students after their graduation. They look for trained professionals, thoroughly prepared not only to solve practical problems but also to be successfully integrated in a team work. Transversal competences are not directly related to the theoretical content of the curricula, and the assessment of the level of transversal competences developed through the university studies is not an easy task. A methodology for evaluating transversal skills during the Final Year Project (FYP) assessment is proposed. And a new modality of FYP to improve the acquisition of transversal skills is presented.
Academics’ ICT Capabilities in a New Educational Paradigm in Developing Countries
Authors: Chigona Agnes , Dagada Rabelani
Published: July 2014

Tertiary institutions in the developing countries are investing a lot in equipping their institutions with Information Communication Technologies (ICT) for teaching and learning. However, there is still a low adoption rate in the use of the new technologies among many academics in these countries. This chapter aims at analysing the factors that impact on the academics’ effective use of ICTs for teaching and learning in the new education paradigm. Sen’s Capability Approach was used as a conceptual lens to examine the academics’ phenomena. Data was collected through in-depth interviews. The analysis of the findings has shown that individual, social, and environmental factors are preventing some academics from realising their potential capabilities from using the new technologies. It is recommended, therefore, that institutions in the developing countries should look into, and deal with accordingly, the conversion factors that are impacting on the academics’ capabilities when utilising the new technologies.
Institutional Knowledge Repositories
Authors: Doctor Gayatri
Published: July 2014

An Institutional Knowledge Repository (IKR) is “a digital archive of intellectual product created by the faculty, research staff, and students of an institution and accessible to end users both within and outside of the institution, with few if any barriers to access.” This chapter discusses the growing trend in Open Access Repositories, Institutional Repositories worldwide. It throws light on the concepts of enterprise resource planning and enterprise content management and then explores academic institutions in India who have already initiated the use of Institutional Knowledge Repositories, as an enterprise content management system for knowledge sharing & management with regard to content, access, and other factors.
Modelling Peterson Mutual Exclusion Algorithm in DVE Language and Verifying LTL Properties
Authors: Long Shi Gong , Yang Han Wen
Published: July 2014

Peterson mutual exclusion algorithm is a concurrent programming algorithm for mutual exclusion that allows two processes to share a single-use resource without conflict, using only shared memory for communication. DiVinE is a LTL model checker, and DVE is the specification language. In this paper, we implement the DVE model of Peterson mutual exclusion algorithm, and verify LTL properties of Peterson mutual exclusion algorithms using DiVinE model checker. The experimental results show that the LTL formula structure is relevant to the costs of LTL verification.
Study on Machining Mechanism of Glass Using Discrete Element Method
Authors: Qiu Ying , Gu Mei Lin , Zhang Feng Guang , Wei Zhi
Published: July 2014

The discrete element method (DEM) is applied to glass micromachining in this study. By three standard tests the discrete element model is established to match the main mechanical properties of glass. Then, indentating, cutting, micro milling process are simulated. Results show that the vertical damage depth is prevented from reaching the final machined surface in cutting process. Tool rake angle is the most remarkable factor influencing on the chip deformation and cutting force. The final machined surface is determined by the minimum cutting thickness per edge. Different cutting thickness, cutter shape and spindle speed largely effect on the mechanism of glass.
Assessment System of Coal Seam Gas Distribution State Based AHP
Authors: Cheng Gen Yin , Feng Shan , Cheng You
Published: July 2014

Coal mine gas accidents impact the safety production of coalmine, and coal seam gas distribution studies can be effective in preventing coal mine gas accident. Coal seam gas distribution affected by many factors, current research is limited to how a single factor impact coal seam gas distribution, but lack a systematic research. We proposed an assessment system of coal seam gas distribution on the basis of measured parameters that combined with storing, geology and working conditions of coal seam. We can effectively integrated assessing coal seam gas distribution state through this assessment system, and then guiding mine gas prevention and control work.
Effect of Preparation on Standard Dry Density and Strength of Foamed Cement by Orthogonal Test
Authors: Li Na , Wang Qi , Song Peng
Published: July 2014

In this paper, we studied the effect of preparation on standard dry density and strength of foamed cement by orthogonal test. The results indicate that the more excellent combination is A1B1C1, namely G1, the standard dry density is 376 kg/m3, the flexural and compressive strengths are 0.43 MPa and 0.8 MPa respectively, and the thermal conductivity is 0.074 W/(m·K), which conforms to the characteristics of light weight and high strength. Fewer Ca (OH)2 crystals and more C-S-H gel generated in G1 through scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis is the reason for its high strength.
The Stability Analysis for One Failure Slope
Authors: Zhong Si Cheng , Zhang Kun Yong , Tang Fang Qing , Zhang Xiong Bing
Published: July 2014

On the basis of field investigation, the stability of the slope was calculated by GEO-SLOPE considering several different influence factors. After comparing these calculated safety factors, the reason for the failure slope was found out. Then, combined with the construction process, a comprehensive evaluation was given to this slope about the reason for slope failure. It was put forward the corresponding management measures according to the main reason.
Research on Computer-Assisted Minimally Invasive Cochlear Implant System
Authors: Zhu Yun Feng , Xu Ying , Ke Jia , Ma Fu Rong , Hu Lei , Li Chang Sheng
Published: July 2014

A computer-assisted minimally invasive cochlear implant system is developed to help doctors perform minimally invasive cochlear implant to avoid disadvantages of traditional complex operation like large invasive and long time to recovery et al. Virtual space visualization, space mapping and operation path plan, mechanism for drill positioning and holding are realized with multi-use of computer navigation and virtual space visualization technology and screw theory. Totally 6 cadaveric skull specimen experiments are performed. In experiments, all cochleae are opened perfectly without facial nerves damaged. The results demonstrate that the computer-assisted minimally invasive cochlear implant system can meet the clinical operation demands.
Analysis of Dynamic Characteristics on Continuous Tension Leveler
Authors: Chen Bing , Xue Jun Qiang , Lin Hai Hai , Yin Zhong Jun
Published: July 2014

This paper aims at the phenomenon of uneven wear of working roll and the work-side wear is much higher than the drive-side of an acid rolling mill tension leveler for dynamics simulation analysis, analyzes the vibration characteristics of working roll in different process parameters and different bias conditions of rolls and vibration test is carried out to test the rolls by Donghua5920 test-collection system, and combined with the field vibration data of bending roll, points that unilateral severe wear of bending roll is mainly the zero problems of tension leveler.
Effects of Defect Shapes on Stress of High-Strength Steel Pipe Using FSI Method
Authors: Cui Yue , Lan Hui Qing , Zhang Zhao Hui , Lin Nan , Du Yong Ping
Published: July 2014

High-strength steel pipes have excellent strength but have poor fracture arrest. By finite-element analysis involving fluid-structure interaction (FSI) method, models of high-strength steel pipe with three kinds of defects (triangle, rectangle and semi-ellipse) were built to determine the concentrated stress based on the working conditions of X70 pipelines in the West-to-East Natural Gas Transmission Project, and the simulation results were compared with the field test results measured by an X-ray stress analyzer. With the same defect width (2 mm), the triangular defect (40°) had a greater influence on the concentrated stress in the pipe than rectangular and semi-elliptic defects. The results can be taken as references of the damage failure process of the defect in pipes in operating conditions as well as a theoretical basis for the fracture arrest of pipes in field operation.
The Finite Element Analysis of Modular Hole of the Lateral Longitudinal Beam in the Power Protection Cabinets
Authors: Guo Yan Jie , Wang Wei , Cui Qing Dong , Dou Hui
Published: July 2014

The lateral longitudinal beam is one of the most important mechanical parts in secondary protection equipment of electrical power system. Basing on the simulation analysis platform of ANSYS Workbench, the standardization of the modular hole of the lateral longitudinal beam is studied in this research. The static and dynamic finite element analysis of the lateral longitudinal beam are used to obtain Von-Mises equivalent stress, deformation data, the natural frequency and vibration mode of five orders. The contrastive analysis of the results of finite element analysis provides a kind of theoretical instruction for the dimension selection of the modular hole.
Optimization Design for Luffing Mechanism of Portal Slewing Crane
Authors: Luo Zhong Hua
Published: July 2014

This paper conducts a comprehensive study on the optimization design for luffing mechanism of portal slewing crane. First, displacement formulae are derived of crampon hinge point of the luffing mechanism. Secondly, mathematical model is established for luffing mechanism optimization design of portal slewing crane, according to the mechanism characteristics, and, with an aim of making crampon hinge end point to move horizontally, and of satisfying the value of maximum and minimum amplitude, and of saving material, etc. Finally, program of optimization design is compiled for the luffing mechanism of portal slewing crane. The luffing mechanism of M4022 portal slewing crane is optimized, and the optimization result is satisfactory. This paper makes it possible to obtain not only each rod length and cross-section area, but also obtain the counterbalance weight and the each rod maximum force of the luffing mechanism.
Development of Real-Time Platform for Engine Emission Control System
Authors: Zhang Jie
Published: July 2014

In order to obtain engine emission data, one engine data acquisition platform was built, NOx data which in exhaust was obtained respectively by exhaust gas sampling analysis and sensor real-time measure, verified the feasibility of real-time platform after comparison and analysis.
Application of Repeater Jamming Technology Aiming at Doppler Fire Control Radar on Ship-to-Ship Missile Penetration
Authors: Men Jin Zhu , E Qun , Wang Hong Jun
Published: July 2014

ECM aiming at fire control radar is an effective method for improving ship-to-ship missile penetration capability. Based on the analysis of Doppler fire control radar working principle, Doppler fire control radar countermeasures strategy is brought up. The repeater jamming technology applied to the ship-to-ship missile, aiming at Doppler fire control radar, and its application conditions are lucubrated. The research has positive significance to the weapon equipment development and operational application.
Performance Analysis of Solar Double Effect LiBr/H2O Absorption Chiller in Subtropical City Based on the Year Round Meteorological Data
Authors: Li Ze Yu , Ye Xiang Yang , Liu Jin Ping
Published: July 2014

The performance of solar double effect LiBr/H2O absorption chiller in which the area of collector array is 27m2 and cooling capacity is 10kW was studied. The simulation is based on the meteorological data of monthly typical day which was summarized from a year round data of subtropical Guangzhou. The distribution of hourly total efficiency and solar fraction was obtained. The system mean performance for different months was analyzed as well. Besides, it is concluded that better performance is gotten as the inlet temperature of collector is 120°C.
A High Linearity 0.7-2.6 GHz Up-Conversion Mixer
Authors: Zhou Chao , Fan Xiang Ning , Hua Zai Jun
Published: July 2014

An up-conversion mixer has been designed for 0.7-2.6GHz multi-mode and multi-standard RF subsystem working under 1.8V voltage based on TSMC 0.18μm process in this paper. The circuit is based on the use of pseudo-differential structure of the Gilbert cell, and in order to increase the gain and linearity, is using a complementary trans-conductance current bleeding structure. In addition, a T-type LC networks can reduce the effect of the parasitic capacitance of the LO switching pairs, and make the linearity of the high-frequency greatly improved. Simulation results show that the circuit is working at 0.7-2.6GHz, the gain of the up-conversion is 9.5-9.7dB , the IIP3 of the circuit is 11.4-12.2dBm, and NF is 13.1-13.5dBm.
Design and Simulation of S-Band Low Noise Amplifier Based on ATF-54143
Authors: Wang Hai Peng , Yang Shu Hui , Feng Meng Lu , Chen Yin Chao
Published: July 2014

This design used a low noise enhanced high electron mobility transistor ATF54143 and Agilent's ADS simulation software to achieve the good performance of operating frequency at 2.45GHz, noise figure (NF) is less than 0.8dB, band gain (S21) is greater than 15dB, input voltage standing-wave ratio (VSWR1) is less than 1.4dB, output voltage standing-wave ratio (VSWR2) is less than 1.6dB.
Research on Trajectory Detection System of Submarine Pipeline
Authors: Qi Shu Fen , Cheng Shi Ping
Published: July 2014

In recent years, the use of submarine pipeline trajectory detection has become more and more widespread, and it not only can improve the efficiency of laying pipelines, but also can detect the state information of pipelines in time. However, most of it has the low detection efficiency and it can not have a good reaction of the specific state. In this paper, we design a detection system of submarine pipeline trajectory which is based on MEMS sensors and Kalman filter that is for date fusion. It can monitor and display the status of the pipeline to ensure the safety production and to avoid pipe damage and security risks.
The Research of Detection and Control System for Indoor Harmful Gas
Authors: Wang Hai Qun , Wang Peng
Published: July 2014

Aiming at indoor harmful gas pollution of residents, a real-time online monitoring system is designed based on the detecting and control of harmful gases. The lower computer system make the STM32F103 microcontroller as the core and make each module been designed which included the sensor temperature and humidity acquisition, gas concentrations acquisition, sensor interface circuits, signal amplification circuit, liquid crystal display circuit, alarm circuit and so on. The upper computer make the microcomputer as the monitoring center which make on-line display of temperature, humidity and gas concentration in real-time, then people can get the indoor harmful gas data for collection and management with the upper computer. CAN bus is adopted for information transfer between the master computer and the slave computer.
Effect of TMCP Parameters on Microstructure and Mechanical Properties of Cargo Oil Tanks Steel
Authors: Yu Chi , Gao Xiu Hua , Wang Ping , Niu Xi Xi , Qiu Chun Lin , Du Lin Xiu , Wang Hong Wei
Published: July 2014

The effect of TMCP parameters on the microstructure and mechanical properties of cargo oil tanks (COT) steel is investigated. The microstructure characteristics are performed by optical microscope, and the mechanical properties are researched by tensile test at ambient temperature and impact test at different temperatures (-20°C, -40°C). The results show that the microstructures of COT steel are a mixed microstructure consisting of ferrite, granular bainite and pearlite, which are resulted from the special TMCP parameters. The COT steel has good comprehensive mechanical properties by analyzing the experimental data, satisfying the international standard. Furthermore, impact fracture surfaces appear small dimples and a few of large ones, most of the dimple with a certain direction, and the inclusion with the fracture is mainly composed of MnS, CaS and Al2O3 composite product.
Scaling Wireless Uplink Capacity with Multi-User Beamforming
Authors: Chen Da Jiang , Qin Zhen , Wang Rui Jing , Qin Zhi Guang
Published: July 2014

Due to the fact that the wireless spectrum is limited but the wireless demand can grow unlimited, how to improve the wireless capacity becomes one of the hot topics in wireless network field. In this paper, we focus on the scenario of busy wireless environment, and present a protocol with multiple user beamforming. The protocol enables a network to scale its uplink throughput with the number of access points. Theoretical and experimental results show that our protocol have higher uplink throughput compared with 802.11. Moreover, our protocol is the first method that shows that linear scaling of uplink throughput with the number of access points is possible.
Testing and Analysis of Communication Equipments Mutual Interference under Complex Electromagnetic Environment
Authors: Yuan Shi Ji , Pei Bin , Liu Zhi Hua , Sun Ming Feng
Published: July 2014

In the experiment and training of electronic information equipments under the complex electromagnetic environment, the mutual interference problem among equipments with different frequency is a difficult problem which influences the effect evaluation. On the basis of the analysis of the mutual interference mechanism, this paper analyzes the influence of the scattered signal, harmonic signal and intermodulation mutual interference signal through tremendous tests and has come to certain conclusion.
The Monitoring and Numerical Simulation Analysis on the Construction of a Shallow Underpass
Authors: Liu Li Sheng , Zhao Jie
Published: July 2014

Based on the dynamic monitoring project of one underpass in Dalian, this paper tries to validate the control effect of the ground settlement on the stability of tunnel surrounding rocks during construction of underground passage under urban arterial road by means of analyzing the vertical ground settlement curves, convergence curves of tunnel inner perimeter and vault displacement curves. With the numerical calculation tool of the software FLAC, it also analyzes the construction of XS-2 # cross-section which was in the south side of the whole construction section at different stages by adopting the plane-strain model. Therefore, we can get the influence curves of ground settlement under different construction stages with considering the release of stress. The simulation results are basically consistent with the measured data, which has a great significance for the subsequent design and construction of underground projects with similar geological conditions.
Model Test Study of Squeezed Branch Pile under Horizontal Vibration Load
Authors: Lv Bing , Gao Xiao Juan
Published: July 2014

Based on the self-design model experimental system of dynamic soil-pile dynamic interaction, strong horizontal dynamic load was exerted to two models of squeezed branch pile, and the bearing plate location of the two squeezed branch piles is different. The model experiment adopt digital frequency converter to control the loading frequency, and use spring of different stiffness coefficient to achieve different load level. In order to analyze the action of bending moment and the status of lateral earth pressure changes, different sizes of excitation frequency and excitation load were setted during the test.
The Dynamic Response of Zhengyangmen Gate Tower Induced by Beijing Metro Line 2
Authors: Song Qi , Guo Jia Qi , Chen Wen Hua , Guo Ping
Published: July 2014

Zhengyangmen gate tower is a national emphasis cultural relic unit along the north-south axis of Beijing, which is above the Beijing metro line 2. Based on dynamic analysis model of gate tower and the position of gate tower and subway, the dynamic response characteristics of gate tower induced by Beijing metro line 2 are calculated, and compared with the in-site vibration test data.
Research of the Key Control Parameters Standard for Shield Tunnel Under-Crossing High Speed Railway
Authors: Liu Zhe , He Ping
Published: July 2014

This paper takes a new shield tunnel as the research object, which intends to cross a section of a high speed railway. Based on design specifications and the existing monitoring data to analyze the change rule of track irregularities, this article proposes the control of wavelength and relevant amplitude in the above case, following the design specifications and long-wave irregularity management demands of high-speed highway. And the controlling values of wavelength and amplitude required are presented with the outcome of the range of the settlement trough, drawn out of the under-crossing process. And it also uses large-scale non-linear finite element analysis software to simulate the high speed railway track deformation in actual constructions, to test whether the deformation meet the requirements of the control standards and deformation law. The results can provide reference for the construction measure when shield tunnel under crosses the high speed railway in the future.
Dynamic Accumulation Damage Characteristics of Initial Cracks for the Lining of High-Speed Railway’s Tunnel
Authors: Wang Xiang Qiu , Cai Bin
Published: July 2014

After have been analysed the initial dynamic cumulative damage mechanism of lining structure of the high speed railway tunnel,the conclusions have been gained that, under the effect of the long-term vibrating load of high speed train, When the damage energy accumulation reached a limit values, the damage zone caused by the initial crack which has been existed in the tunnel lining will be expansed further more. for the more, based on the accumulation damage theory linear elasticity and the analysis method dynamic finite element, The extension characters and calculation method of initail crack in the tunnel lining structures for the high railway have been proposed.
Geotechnical Seismic Isolation System - Further Experimental Study
Authors: Xiong Wei , Yan Ming Ren , Li Yao Zhuang
Published: July 2014

The isolation effectiveness of the Geotechnical Seismic Isolation (GSI) system was further investigated via a series of prescribed shaking-table tests. The dynamic response of GSI system was also evaluated in detail of this work. A parametric study for assessment of the isolation performance of GSI was conducted by varying experimental key parameters, such as rubber percentage of rubber-sand mixtures (RSM), configuration of the foundation, storey number of the superstructure, and different kinds of seismic acceleration inputs. From the parametric survey, it can be concluded that the GSI system can to some extent attenuate the dynamic response of the superstructure under big earthquake shakings.
Analysis about Stability of a Slope
Authors: Yin Ya Jun , Xu Guang Han , Qian Yong Mei
Published: July 2014

Based on the engineering geological conditions of an artificial slope is analyzed using a combination of numerical simulation, the slope ratio method and other methods, the slope stability was evaluated, It has a certain reference to artificial slope stability evaluation that similar to a combination of soil and rock.
Analysis of Micro-Seismic Monitoring Vibration on the Adjacent Buried Pipeline Affected by Impacting of Punching Pile Construction
Authors: She Yan Hua
Published: July 2014

Impact loads caused by punching pile construction of highway bridges are bound to disturb stratum surrounding the buried pipeline adjacent to, which would adversely affect the normal use and safe operation of buried pipelines. Through developing field micro-seismic trial, the characteristics of vibration attenuation and sphere of influence were analyzed, in order to assess its impact on buried pipeline nearby. It drew conclusions that the amplitude of vibration energy had been enlarged with the presence of the pipeline; It should conduct the surface peak velocity above the pipeline as the main control index in routine vibration monitoring of pile foundation construction adjacent to buried pipeline; by positioning analysis of impacting vibration source, the rupture area of rock and soil around the pipeline caused by the vibration was determined, and security measures for pipeline protection was proposed. It provides a new method of control technology for pile foundation construction.
An Energy Dissipation Device Based on Shape Memory Alloys for Frame Structures
Authors: Chen Yun , Zhu Nai Long , Gao Shuai
Published: July 2014

This paper proposes an energy dissipation device based on shape memory alloys (SMA) for frame structures. By setting anchorage device below and near the inflection point of the first storey columns, a set of force cable and energy dissipation cable using SMA are installed symmetrically in the anchorage device and the bottom of them fixed in the ground. Analytical study including the push-over and time-history analysis were investigated by ANSYS finite element program to a new CFST frame and an ordinary CFST frame. Studies have shown that the device can effectively control the structural displacement response and acceleration response, dissipating large amounts of earthquake energy. Therefore, the energy dissipation devices had a better value and prospects in engineering.