This paper initially presents a brief but fairly exhaustive survey of solutions to the concurrency control problem for B-trees. We then propose a new solution, which is characterized by the use of variable-length indices, the employment of a single lock type for the usual access operations and preemptive splits as well as delayed catenations and subdivisions. We also introduce a new compaction ...

In this paper, we propose a hybrid genetic algorithm for partitioning a VLSI circuit graph into two disjoint graphs of minimum cut size. The algorithm includes a local optimization heuristic which is a modification of Fiduccia-Matheses algorithm. Using well-known benchmarks (including ACM/SIGDA benchmarks), the combination of genetic algorithm and the local heuristic outperformed hMetis [3], a ...

English as Foreign Language (EFL) students face additional difficulties for academic writing largely due to their level of language competency. An appropriate structural process of writing can help students develop their academic writing skills. This study explored the use of the e-readers to facilitate EFL students' process-based academic writing. The experiment was conducted in the graduate l...

Experimental s tud ies i n a p p l i c a t i o n o f a-Si:H t o a photoreceptor o f electrophotography and v i dicon t a r g e t o f image pickup tube are summerized. Two types o f b lock ing contacts, homojunction and heterophase b lock ing, have been proposed t o susta in the s u f f i c i e n t charges on the photoreceptor and a low c u r r e n t l e v e l o f v id i con ta rge t i n the dar...

After an initial public o ering, most existing shareholders are subject to a lock-up period in which they cannot sell their shares for a prespeci ed time. At the end of the lock-up, there is a permanent and large shift in the supply of shares. The lock-up expiration is a particularly interesting event to study because it is (i) completely known and observable, and (ii) potentially meaningful ec...

Mechanism of Brown-Rot Decay B r o w n r o t F u n g i r e p r e s e n t o n e o f t h e m o s t economically important groups of wood decay micmorganisms. Some accounts estimate that as high as 80% of all in-service wood decay is c a u s e d b y b r o w n r o t F u n g i . cur ran t wood preservatives protect wood by means of broad spectrum biocides. Understanding the precise mechanism of brow...

Abstract |We consider carrier phase and symbol timing synchronization for M-ary partial-response continuous phase modulation (CPM).We focus on developing a classical phase locked loop (PLL)-basedmethod that is robust even forM-ary partial-response CPMs, which has proven to be elusive thus far in the literature. A key part of our design is a simple yet ešective timing false lock detector, which ...

Let E be a B-complete (B -complete) locally convex algebra and $ the topological direct sum of countably many copies of the scalar field with a jointly continuous algebra multiplication. It has been shown that E is also B-complete (B -complete) for componentwise multiplication on E . B-and Br-completeness of E , the unitization of E, and also of E x for other multiplications on E ...

In this study, we analyzed the cost and volume effects of a waiver that eliminated lock-in restrictions on out-of-plan use in a health maintenance organization (HMO) with a Medicare risk-sharing contract. We compared out-of-plan cost and number of claims during a 15-month base line period when the lock-in was in effect, with a 24-month waiver period when the lock-in was removed. The results dem...