BACKGROUND The objective of this study was to determine whether one can achieve stable fixation of a two column (transverse) acetabular fracture by only fixing a single column with a locking plate and unicortical locking screws. We hypothesized that a locking plate applied to the anterior column of a transverse acetabular fracture would create a construct that is more rigid than a non-locking p...

PURPOSE The purpose of this study was to evaluate the mechanical performance of different suture locking mechanisms including: i) interference fit between the anchor and the bone (eg, 4.5 mm PushLock, 5.5 mm SwiveLock), ii) internal locking mechanism within the anchor itself (eg, 5.5 mm SpeedScrew), or iii) a combination of interference fit and internal locking (eg, 4.5 mm MultiFIX P, 5.5 mm Mu...

Fast userlevel locking is an alternative locking mechanism to the typically heavy weight kernel approaches such as fcntl locking and System V semaphores. Here, multiple processes communicate locking state through shared memory regions and atomic operations. Kernel involvement is only necessary when there is contention on a lock, in order to perform queueing and scheduling functions. In this pap...

Acute locking is a sign of internal derangement of the knee and is an orthopaedic surgical emergency. Differential diagnoses of this condition are torn meniscus, intra-articular loose bodies and torn anterior cruciate ligament. We present a 15-year-old schoolboy who developed acute locking of the knee during dancing. Arthroscopy revealed that he had sustained an osteochondral fracture of the pa...

INTRODUCTION There is a growing use of locking compression plates in fracture surgery. The current study was undertaken to investigate the wound complication rates of locking versus non-locking plates in distal fibular fractures. PATIENTS AND METHODS During a 6-year study period all consecutive, closed distal fibular fractures treated with either a locking or a non-locking plate were included...

In this paper, a locking-based concurrency control scheme is presented for object-oriented databases (OODBs). It is designed for controlling accesses to class hierarchy, which is important concept in OODBs. Based on access frequency for each class, the proposed scheme incurs less locking overhead than existing works, explicit locking and implicit locking, for any OODB environments. In this pape...

A new approach for stable intra-cavity phase locking of several laser channels is presented. In this approach, special interferometric couplers are incorporated inside a laser resonator to obtain efficient self phase-locking between separate laser channels. We analyze the approach and demonstrate experimentally phase-locking of two and of four laser channels, that are derived from Nd:YAG lasers...

We report on the issues raised when designing a customizable locking mechanism for Persistent Java, a type-safe, object-oriented, orthogonally persistent system based on the language Java. Customizable locking mechanisms are supported by locking capabilities. A locking capability is a book-keeper of locks that automatically acquires locks with a customizable connict detection mechanism. It impl...

Signi cant performance advantages can be realized by implementing a database system on a shared memory multiprocessor. An e cient implementation of a lock manager is a prerequisite for e cient transaction processing in multiprocessor database systems. To this end, we advocate adopting an autonomous locking strategy. In autonomous locking, transactions acquire and release locks via operations on...

B category, and a bubble attached to a node represents a set of archaeological records. The size of a bubble attached to a node reflects the number of records belonging to that category. The hyperbolic tree supports ‘‘focus + context’’ navigation; it also provides an overview of records organized in the archaeological digital library. It shows that the records are from seven archaeological site...