introduction: excessive temperature rise during drilling of the mandible for dental implant placement might damage adjacent osseous tissues. various factors affect temperature rise, including the geometrical parameters of surgical drills, one of which is the drill bit head angle. the aim of this research was to determine suitable drill bit head angle to induce minimum temperature rise during ma...

The problem of constructing an adaptive multiuser detector (MUD) is considered for direct sequence code division multiple access (DS-CDMA) signals transmitted through multipath channels. The emerging learning technique, called support vector machines (SVM), is proposed as a method of obtaining a nonlinear MUD from a relatively small training data block. Computer simulation is used to study this...

A study is presented of a miniature ultrasonic surgical drill designed for bone biopsy, based on an ultrasonic/sonic drill which converts high frequency to low frequency vibrations through a freely vibrating mass between an ultrasonic transducer-horn and a drill bit. For conventional surgical drilling using a rotary drill or an ultrasonic drill, considerable power is required to penetrate into ...

In uplink block-fading multiple access channel (BFMAC), the advantage of multiuser diversity (MUD) can be taken to achieve higher system throughput. In this letter, with rate constraints for all users and only channel state information available at the receiver assumed, we demonstrate that nonorthogonal multiple access (NOMA) outperforms the counterpart of orthogonal multiple access (OMA) via e...

Earth is one among five elements having an immense impact on human body. It has been adopted as a treatment modality, i.e. mud therapy in naturopathy. It is a simple, cost effective and efficacious treatment used in the treatment of various disorders. Mud is used as a medicine since long as various references are found available in ancient texts indicating its therapeutic uses. Mud has various ...

Purpose. To rationalize well washing by considering the influence of annular channel limitation, granulometric composition mud, limitation joint movement mud particles, drill string rotation, shape channel, and rheological properties a cleaning agent. Methodology. Applied laboratory studies on drilling fluids are carried out using modern methods analytical analysis experimental studies, in part...

Kick occurrence is a possible event during a drilling process. It is required to be handled immediately using a well control method to avoid blowout, financial losses and damages to the drilling crew. Several methods including driller, wait and weight, and concurrent are applicable in the drilling industry to control a well during a kick incident. In this study, typical well control methods wer...

Multi carrier modulation (MCM) technique is essential for next generation wireless mobile communication system, which achieves high data rate with high spectral efficiency and high flexibility. Orthogonal Frequency Division multiplexing (OFDM) introduces multicarrier concept in Code Division Multiple Access (CDMA) to give rise to novel concept of MC-CDMA system. The OFDM mitigates multiple acce...

This study on the removal of cobalt ions from aqueous solutions by red mud was conducted in batch condition. Its objective was to investigate the possibility of using red mud waste material as an alternative to high cost commercial adsorbent materials for the removal of cobalt from aqueous solution. In this study, batch experiments were carried out for the adsorption of cobalt onto red mud indu...

This study demonstrates that the configuration of a fixed generation number in the conventional genetic algorithm–based multi-user detector (GA-MUD) induces considerable redundant iterations and thus results in a computational inefficiency. To overcome this difficulty, this research suggests a redundancy saving strategy for the GAMUD (RSGA-MUD) based on the cost statistics of the GA solutions i...