Results 31 to 40 of about 34,853 (265)

Learned Query Optimization by Constraint-Based Query Plan Augmentation

Mathematics
Over the last decades, various cost-based optimizers have been proposed to generate optimal plans for SQL queries. These optimizers are key to achieving good performance in database systems and can speed up query execution.
Chen Ye, Haoyang Duan, Hua Zhang, Yifan Wu, Guojun Dai   +4 more
doaj   +1 more source

Trade-Offs Computing Minimum Hub Cover Toward Optimized Labeled Graph Query Processing

Online Academic Journal of Information Technology, 2018
As techniques for graph query processing mature, the need for optimization is increasingly becoming an imperative. Indices are one of the key ingredients toward efficient query processing strategies via cost-based optimization.
Hasan M. Jamil, Kerem Bülbül, Ş. İlker Birbil, Belma Yelbay   +3 more
doaj   +1 more source

Optimization with Uniform Size Queries [PDF]

Algorithmica, 2016
Let \(f\) be a nonnegative, monotone, submodular set function over an \(n\)-element set \(U\). A \textit{value query} to \(f\) is a set \(S \subseteq U\) and its \textit{reply} is the value \(f(S)\). The authors study the following computational problem: given a positive integer \(k\) and \(f\) as above which can only be accessed using value queries of
Uriel Feige, Moshe Tennenholtz
openaire   +1 more source

Association Between Dinutuximab Beta Exposure and Post‐End‐of‐Treatment Survival in Neuroblastoma: A Weighted Patient‐Level Analysis of Three Clinical Studies

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Objectives The association between exposure to dinutuximab beta (DB) and event‐free survival (EFS) or overall survival (OS) of neuroblastoma patients was assessed using data collected during three clinical trials (five cohorts). Methods A systematic review (March 2026) was conducted to identify relevant studies (prospective; registered DB ...
Przemysław Holko, Holger N. Lode, Alberto Garaventa, Carla Manzitti, Roberto Luksch, Dominique Valteau‐Couanet, Marion Gambart, John Anderson, Juliet Gray, Adela Canete, Lucas Moreno, Aleksandra Wieczorek, Cormac Owens, Shifra Ash, Isaac Yaniv, Genevieve Laureys, Hans Loibner, Katarzyna Śladowska, Ruth Ladenstein, Paweł Kawalec   +19 more
wiley   +1 more source

Review of Multi-table Join Order Selection in Databases Based on Machine Learning [PDF]

Jisuanji gongcheng
Multi-table join order selection refers to the process of determining the optimal join sequence among the tables involved in a query during query optimization, to improve execution performance.
WANG Hao, GAO Jintao, WANG Jie
doaj   +1 more source

Research and Implementation of Document-Relational Data Query Execution Tech-nology

Jisuanji kexue yu tansuo, 2020
With the arrival of the era of big data, Internet applications have produced abundant data types. Integ-rating storage, query and organization of data with various structures is a research hotspot of large data management system.
MA Zhicheng, YUAN Haifeng, GU Yang, LIU Yaru, ZHANG Xiao
doaj   +1 more source

Semantic Optimization of Conjunctive Queries [PDF]

Journal of the ACM, 2020
This work deals with the problem of semantic optimization of the central class of conjunctive queries (CQs). Since CQ evaluation is NP-complete, a long line of research has focussed on identifying fragments of CQs that can be efficiently evaluated.
Pablo Barceló, Diego Figueira, Georg Gottlob, Andreas Pieris   +3 more
openaire   +3 more sources

Childhood Acute Lymphoblastic Leukemia Survival in Western Kenya: Reduction in Early Deaths and Treatment Abandonment

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background An earlier study on children diagnosed with acute lymphoblastic leukemia (ALL) at Moi Teaching and Referral Hospital (MTRH) in Kenya reported a low event‐free survival (EFS), excess treatment abandonment, and high induction mortality.
Gilbert Olbara, George Bogonko, Festus Njuguna, Sandra Langat, Martha Kipngetich, Dennis Njenga, Gertjan Johannes Kaspers, Terry Allen Vik   +7 more
wiley   +1 more source

ASSIST: Refinement of a Benefits Navigator Intervention Among Low‐Income Pediatric Oncology Families

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background/Objectives Children with cancer living in poverty experience worse survival and quality of life. Interventions connecting low‐income families to benefits (e.g., Supplemental Nutrition Assistance Program [SNAP] improve health outcomes; yet nearly 50% of SNAP‐eligible pediatric oncology families are unenrolled.
Puja J. Umaretiya, Selena Murcia Mendez, Jennifer Kellett, Sarah Wright, Marisel Ponton, Robin T. Higashi, Rahela Aziz‐Bose, Colleen A. Kelly, Ayesha Zia, Joanne Wolfe, Sandi L. Pruitt, Kira Bona   +11 more
wiley   +1 more source

Determining Parental Factors for Clinical Trial Attrition in Pediatric Acute Lymphoblastic Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background/Objectives Despite high enrollment rates on Children's Oncology Group (COG) protocols, attrition after initial consent is challenging, introducing bias and prolonging trial completion. While adult oncology literature has identified predictors of withdrawal, little is known about caregiver decision‐making for child participation in ...
Kimberly L. Stathas, Jakob Q. Weiss, Kellee N. Parker, Cathy Lee‐Miller   +3 more
wiley   +1 more source