International Journal of Production Economics, Mar 1, 1994
... J. Production Economics 34 (1994) 179-185 international journal of production economics Solvi... more ... J. Production Economics 34 (1994) 179-185 international journal of production economics Solving a generalized model for CON due date assignment and sequencing Prabuddha De, Jay B. Ghosh*, Charles E. Wells Department of MIS and Decision Sciences, University of ...
Hardware Systems. INSTITUTION Texas Univ., Galveston. Medical Branch. PUB DATE 13 NOTE 4p. ; Pape... more Hardware Systems. INSTITUTION Texas Univ., Galveston. Medical Branch. PUB DATE 13 NOTE 4p. ; Paper presented; at the Southwest Instructional Electronics 'Electric-al Engineering Conference, 1973 EDRS PRICE MF-$0.65 BC=83.29 ABSTRACT _ A minicomputerl,based .-dixnpliter-asSisted, instructional , (CAI) systeM, Was .designed at the University of 'Texas Medical -Branch
This article discusses some methods of describing and referring to mathematical objects and of co... more This article discusses some methods of describing and referring to mathematical objects and of consistently and unambiguously signaling the logical structure of mathematical arguments.
Page 1. Optimal Design Of Standby Redundant Components For A System Which Has A Mission Of Random... more Page 1. Optimal Design Of Standby Redundant Components For A System Which Has A Mission Of Random Duration CHARLES E. WELLS Associate Professor University of Dayton JOHN L. BRYANT Associate Professor University of Cincinnati ...
Page 1. An Adaptive Estimation Procedure Using the LaPlace Transformation CHARLES E. WELLS Depart... more Page 1. An Adaptive Estimation Procedure Using the LaPlace Transformation CHARLES E. WELLS Department of Decision Sciences School of Business Administration University of Dayton Dayton, Ohio 45469 JOHN L. BRYANT ...
Page 1. Optimal Preventive Maintenance Policies For Systems With Missions of Random Duration CHAR... more Page 1. Optimal Preventive Maintenance Policies For Systems With Missions of Random Duration CHARLES E. WELLS Associare Professor University of Dayton JOHN L. BRYANT Associate Professor Un~versity of Cinclnnali ...
ABSTRACT In a recent paper, Chen and Bulfin (Computers & Operations Research17, 1–7, 1990... more ABSTRACT In a recent paper, Chen and Bulfin (Computers & Operations Research17, 1–7, 1990) have studied bicriteria scheduling of unit execution time jobs on a single machine for a number of commonly used criteria. They offer simple solutions for the cases when a value function defined over the two criteria is to be maximized, when the criteria themselves are to be hierarchically minimized, and when the criteria are to be simultaneously minimized. This note provides an interpretation of the Chen-Bulfin solution for the value function case, indicates that the solution may not be consistent with the traditional objective, and shows how a consistent solution might be obtained. Furthermore, it points to several flaws in the Chen-Bulfin solution for the simultaneous minimization case (when a completely representative set of efficient schedules must be obtained), and shows how these flaws might be corrected.
To describe trends and highlight epidemiologic and clinical characteristics of childhood tubercul... more To describe trends and highlight epidemiologic and clinical characteristics of childhood tuberculosis (TB) in the United States. All verified TB cases reported to the national TB surveillance system from 1993 to 2001 were included. A child was defined as a person younger than 15 years. A total of 11,480 childhood TB cases were reported. Case rates (TB cases/100,000 population) in all children declined from 2.9 (n = 1663) in 1993 to 1.5 (n = 931) in 2001. Among children, those who were younger than 5 years had the highest rate. California, Texas, and New York accounted for 48% of all childhood TB cases. In 2001, TB case rates were higher for foreign-born (12.2) than US-born children (1.1). Hispanic and non-Hispanic black children accounted for nearly three quarters of all cases. Twenty-four percent of children with TB were foreign-born children, with the largest number originating from Mexico (39.8%), the Philippines (8.6%), and Vietnam (5.7%). Most children had evidence of pulmonary TB disease (78.9%). Among culture-positive cases without previous TB, drug resistance to at least isoniazid was 7.3% and to isoniazid and rifampin was 1.6%. In 1999, 82.9% of children received directly observed therapy for at least part of their treatment and 94.8% completed treatment. Although the overall TB case number among children is declining in the United States, certain groups of children (eg, younger children, racial and ethnic minorities, foreign-born) are at higher risk for TB. As the United States moves toward the elimination of TB, future efforts should endeavor to prevent all cases of childhood TB.
International Journal of Production Economics, Mar 1, 1994
... J. Production Economics 34 (1994) 179-185 international journal of production economics Solvi... more ... J. Production Economics 34 (1994) 179-185 international journal of production economics Solving a generalized model for CON due date assignment and sequencing Prabuddha De, Jay B. Ghosh*, Charles E. Wells Department of MIS and Decision Sciences, University of ...
Hardware Systems. INSTITUTION Texas Univ., Galveston. Medical Branch. PUB DATE 13 NOTE 4p. ; Pape... more Hardware Systems. INSTITUTION Texas Univ., Galveston. Medical Branch. PUB DATE 13 NOTE 4p. ; Paper presented; at the Southwest Instructional Electronics 'Electric-al Engineering Conference, 1973 EDRS PRICE MF-$0.65 BC=83.29 ABSTRACT _ A minicomputerl,based .-dixnpliter-asSisted, instructional , (CAI) systeM, Was .designed at the University of 'Texas Medical -Branch
This article discusses some methods of describing and referring to mathematical objects and of co... more This article discusses some methods of describing and referring to mathematical objects and of consistently and unambiguously signaling the logical structure of mathematical arguments.
Page 1. Optimal Design Of Standby Redundant Components For A System Which Has A Mission Of Random... more Page 1. Optimal Design Of Standby Redundant Components For A System Which Has A Mission Of Random Duration CHARLES E. WELLS Associate Professor University of Dayton JOHN L. BRYANT Associate Professor University of Cincinnati ...
Page 1. An Adaptive Estimation Procedure Using the LaPlace Transformation CHARLES E. WELLS Depart... more Page 1. An Adaptive Estimation Procedure Using the LaPlace Transformation CHARLES E. WELLS Department of Decision Sciences School of Business Administration University of Dayton Dayton, Ohio 45469 JOHN L. BRYANT ...
Page 1. Optimal Preventive Maintenance Policies For Systems With Missions of Random Duration CHAR... more Page 1. Optimal Preventive Maintenance Policies For Systems With Missions of Random Duration CHARLES E. WELLS Associare Professor University of Dayton JOHN L. BRYANT Associate Professor Un~versity of Cinclnnali ...
ABSTRACT In a recent paper, Chen and Bulfin (Computers & Operations Research17, 1–7, 1990... more ABSTRACT In a recent paper, Chen and Bulfin (Computers & Operations Research17, 1–7, 1990) have studied bicriteria scheduling of unit execution time jobs on a single machine for a number of commonly used criteria. They offer simple solutions for the cases when a value function defined over the two criteria is to be maximized, when the criteria themselves are to be hierarchically minimized, and when the criteria are to be simultaneously minimized. This note provides an interpretation of the Chen-Bulfin solution for the value function case, indicates that the solution may not be consistent with the traditional objective, and shows how a consistent solution might be obtained. Furthermore, it points to several flaws in the Chen-Bulfin solution for the simultaneous minimization case (when a completely representative set of efficient schedules must be obtained), and shows how these flaws might be corrected.
To describe trends and highlight epidemiologic and clinical characteristics of childhood tubercul... more To describe trends and highlight epidemiologic and clinical characteristics of childhood tuberculosis (TB) in the United States. All verified TB cases reported to the national TB surveillance system from 1993 to 2001 were included. A child was defined as a person younger than 15 years. A total of 11,480 childhood TB cases were reported. Case rates (TB cases/100,000 population) in all children declined from 2.9 (n = 1663) in 1993 to 1.5 (n = 931) in 2001. Among children, those who were younger than 5 years had the highest rate. California, Texas, and New York accounted for 48% of all childhood TB cases. In 2001, TB case rates were higher for foreign-born (12.2) than US-born children (1.1). Hispanic and non-Hispanic black children accounted for nearly three quarters of all cases. Twenty-four percent of children with TB were foreign-born children, with the largest number originating from Mexico (39.8%), the Philippines (8.6%), and Vietnam (5.7%). Most children had evidence of pulmonary TB disease (78.9%). Among culture-positive cases without previous TB, drug resistance to at least isoniazid was 7.3% and to isoniazid and rifampin was 1.6%. In 1999, 82.9% of children received directly observed therapy for at least part of their treatment and 94.8% completed treatment. Although the overall TB case number among children is declining in the United States, certain groups of children (eg, younger children, racial and ethnic minorities, foreign-born) are at higher risk for TB. As the United States moves toward the elimination of TB, future efforts should endeavor to prevent all cases of childhood TB.
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