In this paper, we present the current state of the art in semantic data modeling of multimedia data. Semantic conceptualization can be performed at several levels of information granularity, leading ...to multilevel indexing and searching mechanisms. Various models at different levels of granularity are compared. At the finest level of granularity, multimedia data can be indexed based on image contents, such as identification of objects and faces. At a coarser level of granularity, indexing of multimedia data can be focused on events and episodes, which are higher level abstractions. In light of the above, we also examine modeling and indexing techniques of multimedia documents.
Emerging multimedia technologies will allow users to store, retrieve, share and manipulate complex information in order to build exciting multimedia applications. Key challenges in the development of ...multimedia database systems include: content analysis of images and video data; knowledge-based representation of multimedia data; semantic modeling of events of interest and management of spatio-temporal metadata; facilities to retrieve multimedia data containing contents of interest to users; and design and development of high-performance multimedia database servers for networked environments. Multimedia systems must exhibit high degrees of robustness, efficiency and reliability for deployment in real-world environments.
High-performance servers and high-speed networks will form the backbone of the infrastructure required for distributed multimedia information systems. A server for an interactive distributed ...multimedia system may require thousands of gigabytes of storage space and a high I/O bandwidth. In order to maximize the system utilization, and thus minimize the cost, it is essential that the load be balanced among each of the server's components, viz. the disks, the interconnection network and the scheduler. Many algorithms for maximizing retrieval capacity from the storage system have been proposed in the literature. This paper presents techniques for improving the server capacity by assigning media requests to the nodes of a server so as to balance the load on the interconnection network and the scheduling nodes. Five policies for request assignment-round-robin (RR), minimum link allocation (MLA), minimum contention allocation (MCA), weighted minimum link allocation (WMLA) and weighted minimum contention allocation (WMCA)-are developed. The performance of these policies on a server model developed by the authors (1995) is presented. We also consider the issue of file replication, and develop two schemes for storing the replicas: the parent group-based round-robin placement (PGBRRP) scheme, and the group-wide round-robin placement (GWRRP) scheme. The performance of the request assignment policies in the presence of file replication is presented.
Structured documents have gained popularity with the advent of documentstructure markupstandards such as SGML, ODA, HyTime, and HTML.Document management systems can provide powerful facilities by ...maintaining thestructure information of documents.Since the hypermediadocument is also a kind of structured document, wecan apply the results of many studies, whichhave been performed in storing, retrieving, and managing structured documents,to the hypermedia document management. However, more factors should be considered in handling hypermedia documentsbecause they contain multimedia data and also have multiple complex structuressuch as hyperlink networks and spatial/temporal layout structures as well aslogical structures. In this paper, we propose an object-oriented model for multi-structuredhypermediadocuments and multimedia data, and a query language for retrievinghypermedia document elements based on the content and multiple complexstructures.By using unique element identifiers and an indexing scheme whichexploits multiple structures,we can process queries efficiently with minimal storage overheadfor maintaining structure information.PUBLICATION ABSTRACT
A class of order-preserving dynamic hashing structures is introduced and analyzed. The access method is referred to as the dynamic random-sequential access method (DRSAM) and is derived from linear ...hashing. A new logical to physical mapping that is based on sequential bucket allocations in hash order is proposed. With respect to previous methods, this allocation technique has the following characteristics: (1) the structure captures the hashed order in consecutive storage areas so that order preserving (OPH) schemes should result in performance improvements for range queries and sequential processing; and (2) it adapts elastic buckets for the control of file growth. Under specific conditions, this approach outperforms the partial expansion method previously proposed by P.-A. Larson (1982).< >
General Considerations...e70 Risk Assessment Using Clinical Parameters...e71 Advanced Testing: Resting and Stress Noninvasive Testing...e72 Resting Imaging to Assess Cardiac Structure and Function: ...Recommendations...e72 Stress Testing and Advanced Imaging in Patients With Known SIHD Who Require Noninvasive Testing for Risk Assessment: Recommendations...e74 Risk Assessment in Patients Able to Exercise...e74 Risk Assessment in Patients Unable to Exercise...e74 Risk Assessment Regardless of Patients' Ability to Exercise...e74 Exercise ECG...e75 Exercise Echocardiography and Exercise Nuclear MPI...e76 Dobutamine Stress Echocardiography and Pharmacological Stress Nuclear MPI...e77 Pharmacological Stress CMR Imaging...e77 Special Patient Group: Risk Assessment in Patients Who Have an Uninterpretable ECG Because of LBBB or Ventricular Pacing...e77 Prognostic Accuracy of Anatomic Testing to Assess Risk in Patients With Known CAD...e78 Coronary CT Angiography...e78 Coronary Angiography...e78 Coronary Angiography as an Initial Testing Strategy to Assess Risk: Recommendations...e78 Coronary Angiography to Assess Risk After Initial Workup With Noninvasive Testing: Recommendations...e78 Treatment...e80 Definition of Successful Treatment...e80 General Approach to Therapy...e82 Factors That Should Not Influence Treatment Decisions...e83 Assessing Patients' Quality of Life...e84 Patient Education: Recommendations...e84 Guideline-Directed Medical Therapy...e86 Risk Factor Modification: Recommendations...e86 Lipid Management...e86 Blood Pressure Management...e88 Diabetes Management...e89 Physical Activity...e91 Weight Management...e92 Smoking Cessation Counseling...e92 Management of Psychological Factors...e93 Alcohol Consumption...e94 Avoiding Exposure to Air Pollution...e94 Additional Medical Therapy to Prevent MI and Death: Recommendations...e95 Antiplatelet Therapy...e95 Beta-Blocker Therapy...e96 Renin-Angiotensin-Aldosterone Blocker Therapy...e97 Influenza Vaccination...e98 Additional Therapy to Reduce Risk of MI and Death...e99 Medical Therapy for Relief of Symptoms...e100 Use of Anti-ischemic Medications: Recommendations...e100 Alternative Therapies for Relief of Symptoms in Patients With Refractory Angina: Recommendations...e104 Enhanced External Counterpulsation...e104 Spinal Cord Stimulation...e105 Acupuncture...e105 CAD Revascularization...e106 Heart Team Approach to Revascularization Decisions: Recommendations...e106 Revascularization to Improve Survival: Recommendations...e108 Revascularization to Improve Symptoms: Recommendations...e109 CABG Versus Contemporaneous Medical Therapy...e109 PCI Versus Medical Therapy...e110 CABG Versus PCI...e110 CABG Versus Balloon Angioplasty or BMS...e110 CABG Versus DES...e111 Left Main CAD...e111 CABG or PCI Versus Medical Therapy for Left Main CAD...e111 Studies Comparing PCI Versus CABG for Left Main CAD...e111 Revascularization Considerations for Left Main CAD...e112 Proximal LAD Artery Disease...e112 Clinical Factors That May Influence the Choice of Revascularization...e113 Completeness of Revascularization...e113 LV Systolic Dysfunction...e113 Previous CABG...e113 Unstable Angina/Non-ST-Elevation Myocardial Infarction...e113 DAPT Compliance and Stent Thrombosis: Recommendation...e113 Transmyocardial Revascularization...e114 Hybrid Coronary Revascularization: Recommendations...e114 Special Considerations...e114 Women...e115 Older Adults...e115 Diabetes Mellitus...e116 Obesity...e117 Chronic Kidney Disease...e118 HIV Infection and SIHD...e118 Autoimmune Disorders...e119 Socioeconomic Factors...e119 Special Occupations...e119 Patient Follow-Up: Monitoring of Symptoms and Antianginal Therapy...e119 Clinical Evaluation, Echocardiography During Routine, Periodic Follow-Up: Recommendations...e120 Follow-Up of Patients With SIHD...e121 Focused Follow-Up Visit: Frequency...e121 Focused Follow-Up Visit: Interval History and Coexisting Conditions...e121 Focused Follow-Up Visit: Physical Examination...e122 Focused Follow-Up Visit: Resting 12-Lead ECG...e122 Focused Follow-Up Visit: Laboratory Examination...e122 Noninvasive Testing in Known SIHD...e122 Follow-Up Noninvasive Testing in Patients With Known SIHD:
Index structures for structured documents Lee, Yong Kyu; Yoo, Seong-Joon; Yoon, Kyoungro ...
International Conference on Digital Libraries: Proceedings of the first ACM international conference on Digital libraries; 20-23 Mar. 1996,
04/1996
Conference Proceeding
PDF
