Failures in the water distribution network are some most important factors in water losses, water shortage and dissatisfaction of users and secondary pollutions as well. This research aimed to analyze failure in water distribution networks during 2006-2008, for better water management. Daily failure reports in Ahvaz, Iran distribution network during 2006-2008, were collected from emergency depa...

Ceramic bearing surfaces are being increasingly used in young patients undergoing total hip arthroplasty. However,failures have been reported including fractures even with the newer third generation ceramics. The recommendedtreatment for fracture of ceramic bearing surfaces is complete synovectomy and revision total hip arthroplasty.However, disappointing results have also bee...

PURPOSE Determine the failure patterns of oral cavity squamous cell carcinoma (SCC) treated with intensity-modulated radiotherapy (IMRT). METHODS AND MATERIALS Between May 2001 and July 2005, 55 patients with oral cavity SCC were treated with IMRT for curative intent. Forty-nine received postoperative IMRT, 5 definitive IMRT, and 1 neoadjuvant. Three target volumes were defined (clinical targ...

PURPOSE This study retrospectively evaluated implant survival of 631 osseointegrated implants installed in irradiated cancer patients over a 25-year period. PATIENTS AND METHODS The files of 107 patients followed since 1979 were evaluated. Factors influencing implant survival as oncologic treatment, radiotherapy protocols, patient and implant related elements were analyzed. RESULTS Compared...

The development of resistant strains of HIV is the most significant barrier to effective long-term treatment of HIV infection. The most common causes of resistance development are patient noncompliance and pre-existence of resistant strains. In this paper, methods of antiviral regimen switching are developed that minimize the risk of pre-existing resistant virus emerging during therapy switches...

BACKGROUND Salvage surgery after concomitant chemoradiation therapy (CCRT) for patients with head and neck squamous cell carcinomas (HNSCC) is challenging because of its associated morbidity/mortality and the poor prognoses of these patients. METHODS The outcome analysis of prospectively collected data from 93 patients with HNSCC with local and/or regional shows treatment failures but without...

The new superbug Neisseria gonorrhoeae has retained resistance to antimicrobials previously recommended for first-line treatment and has now demonstrated its capacity to develop resistance to the extended-spectrum cephalosporin, ceftriaxone, the last remaining option for first-line empiric treatment of gonorrhea. An era of untreatable gonorrhea may be approaching, which represents an exceedingl...

Despite the high success rates and stability of dental implants, failures do occur. While surgical trauma together with bone volume and quality are generally believed to be the most important etiological factors for early implant failures, the etio logy of late failures is more controversial. Early detection and treatment of early progressive bone loss around dental implants by mechanical debri...

A key challenge for proactive handling of faults is the prediction of system failures. The main principle of the approach presented here is to identify and recognize patterns of errors that lead to failures. I propose the use of hidden Markov models (HMMs) as they have been successfully used in other pattern recognition tasks. The paper further motivates their use, explains how HMMs can be used...