Mark A. Roth

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Relaxing the assumption that relations are always in First-Normal-Form (1NF) necessitates a reexamination of the fundamentals of relational database theory. In this paper we take a first step towards unifying the various theories of ¬1NF databases. We start by determining an appropriate model to couch our formalisms in. We then define an extended(More)
Despite the fact that computer memory costs have decreased dramatically over the past few years, data storage still remains, and will probably always remain, an important cost factor for many large scale database applications. Compressing data in a database system is attractive for two reasons: data storage reduction and performance improvement. Storage(More)
OBJECTIVE To assess the efficacy of a Web-based tailored behavioral weight management program compared with Web-based information-only weight management materials. RESEARCH METHODS AND PROCEDURES Participants, 2862 eligible overweight and obese (BMI = 27 to 40 kg/m2) members from four regions of Kaiser Permanente's integrated health care delivery system,(More)
The desire to extend the applicability of the relational model beyond traditional data-processing applications has stimulated interest in nested or non-first normal form relations in which the attributes of a relation can take on values which are sets or even relations themselves. In this paper, we study the role of null values in the nested relational(More)
The immunomodulatory drugs (IMiDs) lenalidomide and actimid (also known as CC-4047) are thalidomide analogues which are more potent than their parental compound. In combination with rituximab, we have previously demonstrated that IMiDs have synergistic in vivo anti-tumour activity in preclinical studies in a human lymphoma severe combined immunodeficiency(More)
We aimed to estimate the reliability of the 4-item Perceived Stress Scale (PSS) and its validity in predicting maternal depression and quality of life (QoL). Data regarding stress, depression and QoL were collected during pregnancy among a sub-sample from the Organization of Teratology Information Specialists Antidepressants in Pregnancy Cohort. The 4-item(More)
INTRODUCTION Before the implementation of a multidisciplinary disease-state-management program in the Kaiser Permanente Ohio Region, the primary care physician (PCP) worked with a registered nurse care manager (RNCM) and a clinical pharmacist with the degree of PharmD to control diabetes mellitus (DM). This occurred through PCP referral when patients(More)
We develop new algorithms for the design of non first normal form relational databases that are in nested normal form. Previously, a set of given multivalued dependencies and those multivalued dependencies implied by given functional dependencies were used to obtain a nested normal form decomposition of a scheme. This method ignored the semantic distinction(More)