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Two-Dwell Synchronization Techniques and Mimo Systems for Performance Improvements of 3G Mobile Communications

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International Journal of Communications, Network and System Sciences 2009年第6期2卷 511-517页

作者： f. BENEDETTO G. GIUNTA 不详

This paper considers the case of smart antennas and multiple inputs multiple outputs (MIMO) systems, suited for the radio access of 3G mobile communications, involving two-dimensional spatio-temporal signal processing and two-dwell procedures. The main novelty of our work is twofold: first, a two-dwell acquisition technique is here performed to save the mean acquisition time versus one-dwell acquisition techniques;sec-ond, the searching procedure is driven from the estimates of the local signal-to-interference-plus-noise ratio, reducing again the mean acquisition time. Some examples of application to the detection of 3G communication signals in typical mobile scenarios are provided and we have verified the effectiveness of the analyzed spatio-temporal two-dwell procedures. The presented technique seems to constitute a promising tool for analytic setting of near optimum spatio-temporal acquisition testing procedures based on serial search/veri-fication modes.

关键词： Initial Code Acquisition and Synchronization MIMO Systems Probability Tests Sptio-Temporal

Assessing the potential for satellite image monitoring of seagrass thermal dynamics:for inter-and shallow sub-tidal seagrasses in the inshore Great Barrier Reef World Heritage Area,Australia

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International Journal of Digital Earth 2018年第8期11卷 803-824页

作者： S.R.Phinn E.M.Kovacs C.M.Roelfsema R.f.Canto C.J.Collier L.J.McKenzie Remote Sensing Research Centre School of Earth and Environmental SciencesUniversity of QueenslandSt LuciaAustralia Centre for Tropical Water and TERRAtic Ecosystem Research(TropWATER) James Cook UniversityCairnsAustralia

Seagrass meadows are at increasing risk of thermal stress and recent work has shown that water temperature around seagrass meadows could be used as an indicator for seagrass *** thermal data have not been linked to the thermal properties of seagrass *** work assessed the covariation between 20 in situ average daily temperature logger measurement sites in tropical seagrass meadows and satellite derived daytime SST(sea surface temperature)from the daytime MODIS and Landsat sensors along the Great Barrier Reef coast in *** significant(R2=0.787–0.939)positive covariations were found between in situ seagrass logger temperatures and MODIS SST temperature and Landsat sensor temperatures at all sites along the *** MODIS SST were consistently higher than in situ temperature at the majority of the sites,possibly due to the sensor’s larger pixel size and location offset from field *** thermal data were lower than field-measured SST,due to differences in measurement scales and *** refined significantly and tested over larger areas,this approach could be used to monitor seagrass health over large(106 km2)areas in a similar manner to using satellite SST for predicting thermal stress for corals.

关键词： Seagrass temperature thermal tolerance satellite sea surface temperature Landsat MODIS Great Barrier Reef

Direct anterior total hip arthroplasty:Comparative outcomes and contemporary results

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World Journal of Orthopedics 2016年第2期7卷 94-101页

作者： Keith P Connolly Atul f Kamath Department of Orthopedic Surgery Center for Hip PreservationPenn MedicineUniversity of Pennsylvania

Direct anterior total hip arthroplasty has become increasingly more popular among arthroplasty surgeons,in large part due to the use of an intramuscular interval and desire to reduce soft tissue *** studies have now been published comparing the anterior intramuscular to other commonly used approaches,and many studies have published complication rates on large series of *** of comparative studies indicates direct anterior hips tend towards shorter hospital stays and high rates of patients discharged to *** some studies show evidence of early benefit in functional outcomes,there is no strong evidence that the anterior approach provides any long term functional improvements compared to other ***,evidence to support reduced damage to soft tissue may not translate to certain clinical *** of intra-operative femur fracture,operative time and blood loss rates are notably higher for those developing familiarity with this ***,when surgeons have performed a modest number of procedures,the complication rates tend to markedly decrease in most studies to levels comparable to other *** of component positioning also favors the anterior approach in some *** review summarizes the available literature comparing the direct anterior to other approaches for total hip arthroplasty and provides a comprehensive summary of common complications.

关键词： Complications Direct anterior approach Surgical hip approaches Outcomes Total hip arthroplasty

On the Use of Benford’s Law to Detect JPEG Biometric Data Tampering

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Journal of Information Security 2017年第3期8卷 240-256页

作者： Iorliam Aamo Shangbum f. Caleb Department of Mathematics/Computer Science Benue State University Makurdi Nigeria Department of Computer Science Nigerian Army Institute of Technology & Environmental Studies Makurdi Nigeria

Tampering of biometric data has attracted a great deal of attention recently. furthermore, there could be an intentional or accidental use of a particular biometric sample instead of another for a particular application. Therefore, there exists a need to propose a method to detect data tampering, as well as differentiate biometric samples in cases of intentional or accidental use for a different application. In this paper, fingerprint image tampering is studied. furthermore, optically acquired fingerprints, synthetically generated fingerprints and contact-less acquired fingerprints are studied for separation purposes using the Benford’s law divergence metric. Benford’s law has shown in literature to be very effective in detecting tampering of natural images. In this paper, the Benford’s law features with support vector machine are proposed for the detection of malicious tampering of JPEG fingerprint images. This method is aimed at protecting against insider attackers and hackers. This proposed method detected tampering effectively, with Equal Error Rate (EER) of 2.08%. Again, the experimental results illustrate that, optically acquired fingerprints, synthetically generated fingerprints and contact-less acquired fingerprints can be separated by the proposed method effectively.

关键词： Benford’s Law fingerprints JPEG Coefficients Tampering

Kravchenko probabilityweight functions in problems of radar signals correlation processing

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Journal of Measurement Science and Instrumentation 2013年第3期4卷 231-237页

作者： V f Kravchenko D V Churikov Kotel'nikov Institute of Radio Engineering and Electronics of Russian Academy of Sciences

In this report the combined method of correlation radar signal(RS)processing based on the theory of atomic functions(Af)is *** of using of new Kravchenko probability weight functions(Wf)designs are *** functional to estimate accuracy and efficiency of RS processing for concrete physical models is *** is shown that the proposed approach significantly improves the quality of the coherent analysis of RS.

关键词： radar signal (RS) atomic funtions (Af) weight functions (Wf)CLC number:TN911.7 Document code:AArticle ID:1674-8042(2013)03-0231-07

Direct anterior total hip arthroplasty: Literature review of variations in surgical technique

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World Journal of Orthopedics 2016年第1期7卷 38-43页

作者： Keith P Connolly Atul f Kamath Department of Orthopedic Surgery Center for Hip Preservation Pennsylvania HospitalUniversity of Pennsylvania

The direct anterior approach to the hip has been suggested to have several advantages compared to previously popular approaches through its use of an intra-muscular and intra-nervous interval betweenthe tensor fasciae latae and sartorius muscles. Recent increased interest in tissue-sparing and minimallyinvasive arthroplasty has given rise to a sharp increase in the utilization of direct anterior total hip arthroplasty. A number of variations of the procedure have been described and several authors have published their experiences and feedback to successfully accomplishing this procedure. Additionally, improved understanding of relevant soft tissue constraints and anatomic variants has provided improved margin of safety for patients. The procedure may be performed using speciallydesigned instruments and a fracture table, however many authors have also described equally efficacious performance using a regular table and standard arthroplasty tools. The capacity to utilize fluoroscopy intraoperatively for component positioning is a valuable asset to the approach and can be of particular benefit for surgeons gaining familiarity. Proper management of patient and limb positioning are vital to reducing risk of intra-operative complications. An understanding of its limitations and challenges are also critical to safe employment. This review summarizes the key features of the direct anterior approach for total hip arthroplasty as an aid to improving the understanding of this important and effective method for modern hip replacement surgeons.

关键词： Anterior hip arthroplasty Anterior supine intramuscular approach Total hip arthroplasty Direct anterior approach

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提取冶金原理第1卷冶金原理

A Survey of Approaches Reconciling between Safety and Security Requirements Engineering for Cyber-Physical Systems

1978年

作者：（美）f·哈伯斯

来源：汇雅图书（南通市图书馆... 评论

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Journal of Computer and Communications 2017年第1期5卷 94-100页

作者： Mohammed f. H. Abulamddi Department of Software Engineering University of Palestine Al-Zahra Palestine

The fields of safety and security use different conceptual standards and methods. As a consequence, these two separate but related research areas utilize different approaches. Addressing the integration between safety and security concerns in this context, we would conduct a survey exploring approaches and standards that were created by the scholars to combine safety and security requirement engineering.

关键词： Standards Security Safety Reconcile Dependability Requirements

Children’s growth and motor development following a severe burn:a systematic review

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Burns & Trauma 2023年第1期11卷 349-360页

作者： Maxime D.Cuijpers Martin G.A.Baartmans Paul P.M.van Zuijlen Johannes C.f.Ket Anouk Pijpe Red Cross Hospital Burn Centre BeverwijkVondellaan 13BeverwijkThe Netherlands Amsterdam University Medical Centre Location VU University Medical CentreDepartment of PlasticReconstructiveand Hand SurgeryAmsterdam Movement Sciencesde Boelelaan 1117AmsterdamThe Netherlands Association of Dutch Burn Centres Zeestraat 27-29BeverwijkThe Netherlands Maasstad Hospital Department of PaediatricsMaasstadweg 21Rotterdam3079 DZThe Netherlands Red Cross Hospital Department of Plastic SurgeryReconstructive and Hand SurgeryVondellaan 13Beverwijk1942 LEThe Netherlands Paediatric Surgical Centre Emma Children’s HospitalAmsterdam UMCUniversity of AmsterdamVrije UniversiteitMeibergdreef 9Amsterdam1105 AZThe Netherlands Medical Library Vrije Universiteitde Boelelaan 1117AmsterdamThe Netherlands

Background:The epidemiological data on post-burn growth,body composition and motor devel-opment is ambiguous and *** aim of this systematic review was therefore to summarize the current body of evidence on post-burn growth,body composition and motor development in ***:A literature search was conducted in PubMed,EMBASE and Web of Science up to March *** considered observational studies that reported(1)metrics on weight,height,body composition,bone mineral content,bone mineral density or motor development,in(2)paediatric burn patients and(3)published in a peer-reviewed ***:A total of 16 studies were *** of the included studies used quantitative methods,but with differing methodology:prospective cohort studies(n=8),retrospective chart reviews(n=3),case-control studies(n=2),cross sectional studies(n=2)and a retrospective cohort study(n=1).When combined,the included studies represented 2022 paediatric burn patients,with a mean age of 7.7(±3.2)*** average burn sizewas 52.8%(±12.7)of the total body surface *** outcome measures included weight(n=12),height(n=7),muscular strength(n=4),bone mineral content(n=5),bone mineral density(n=5),body mass index(n=3),fat mass(n=5),lean body mass(n=7)and fine and gross motor development(n=1).Conclusions:following an initial decline,patients’growth and motor development started to recover during the first or second year ***,burns may have a profound and prolonged effect on the paediatric burn patients’muscular strength,bone mineral content and lean body *** should be noted that the vast majority of studies included only patients with burns covering≥30%total body surface *** evidence presented in this review may thus not be representative of the whole paediatric burn population.

关键词： Burns Children Weight Height Bone Muscle Motor function