Purdue University

About: Purdue University is a education organization based out in West Lafayette, Indiana, United States. It is known for research contribution in the topics: Population & Heat transfer. The organization has 73219 authors who have published 163563 publications receiving 5775236 citations. The organization is also known as: Purdue & Purdue-West Lafayette.

Prokaryotic osmoregulation: genetics and physiology.

Abstract: INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . .. .. . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 570 MECHANISMS UNDERLYING OSMOREGULATORY RESPONSES.... . . .. .. . . . . . .. .. 571 Homeostasis vs Adaptation to Change. . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . 571 Examination of Possible Signals . . . . . ...... . . . . . . . . . : 573 PHYSIOLOGY OF OSMOTIC REGULATION . . . . .. .. . . . . . . . .... . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 581 Compatible Solutes Synthesized and/or Transported . . . . . . . . . . . . . . . . . 581 Osmoregulation of the Periplasm . . . . . . . . ... . . . . . . . .... . . . . . . . ..... . . . . . . . .. . . . . 588 GENES AND PROTEINS . . . . . . . . . . . . . . . . .. .. . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . 588 The EnvZ/OmpR-Dependent Expression of the ompF and ompC Genes of E. coli K-12 .. . . . . . . . ..... .. . .. ....... . . . . . ....... . . . . . . ..... . . . 589 The kdpABC operon of E. coli . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 592 The proU Operon of E. coli and S. typhimurium . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . 593 Other Osmoregulated Genes. . ......... 597

High-order entropy-compressed text indexes

Abstract: We present a novel implementation of compressed suffix arrays exhibiting new tradeoffs between search time and space occupancy for a given text (or sequence) of n symbols over an alphabet σ, where each symbol is encoded by lgvσv bits. We show that compressed suffix arrays use just nHh + σ bits, while retaining full text indexing functionalities, such as searching any pattern sequence of length m in O(m lg vσv + polylog(n)) time. The term Hh ≤ lg vσv denotes the hth-order empirical entropy of the text, which means that our index is nearly optimal in space apart from lower-order terms, achieving asymptotically the empirical entropy of the text (with a multiplicative constant 1). If the text is highly compressible so that Hn = o(1) and the alphabet size is small, we obtain a text index with o(m) search time that requires only o(n) bits. Further results and tradeoffs are reported in the paper.

Circumplex Model of marital and family systems: VI. Theoretical update.

Abstract: This paper updates the theoretical work on the Circumplex Model and provides revised and new hypotheses. Similarities and contrasts to the Beavers Systems Model are made along with comments regarding Beavers and Voeller's critique. FACES II, a newly revised assessment tool, provides both "perceived" and "ideal" family assessment that is useful empirically and clinically.

When is PBL More Effective? A Meta-synthesis of Meta-analyses Comparing PBL to Conventional Classrooms

Abstract: Problem-based learning (PBL) has been utilized for over 40 years in a variety of diff erent disciplines. Although extensively researched, there is heated debate about the eff ectiveness of PBL. Several meta-analyses have been conducted that provide a synthesis of the eff ects of PBL in comparison to traditional forms of instruction. This study used a qualitative meta-synthesis approach to compare and contrast the assumptions and fi ndings of the meta-analytical research on the eff ectiveness of PBL. Findings indicated that PBL was superior when it comes to long-term retention, skill development and satisfaction of students and teachers, while traditional approaches were more eff ective for short-term retention as measured by standardized board exams. Implications are discussed.