First paleomagnetic and magnetic anisotropy results from Montenegro – the coastal area

<p>In the Southern part of Montenegro three main tectonic units are distinguished. The Dalmatian (South-Adriatic) zone is in the lowermost tectonic position and comprises shallow water Cretaceous carbonates, bauxites, Middle Eocene nummulitic limestones, transitional marls, and Upper Eocene flysch. It is thrusted over by the Budva zone characterized by deep water sediments of Triassic through Paleogene ages with tuffitic layers in the Ladinian. The uppermost unit is the High Karst zone developed in a carbonate platform environment from the Middle Triassic till the end of the Cretaceous. In this unit flysch sedimentation started after the K/T boundary.<br>From the above units we drilled and oriented in situ a total of 248 samples representing nine localities from the Dalmatian, six from the Budva and five from the High Karst zone, respectively. The harder rocks were drilled with portable gasoline powered, the softer ones with an electric drill. The laboratory measurements, demagnetizations, statistical evaluations of the measurements were carried out using standard methods in the Paleomagnetic Laboratory of the Mining and Geological Survey of Hungary. <br>From the Dalmatian zone, the Upper Cretacous limestones have diamagnetic susceptibilities, very weak NRM, which either failed to provide statistically acceptable results (two localities) or obtained their remanence quite recently. The five flysch and transitional marl localities have well-defined AMS fabrics as well as paleomagnetic directions. The AMS fabrics must have been imprinted in a NE-SW oriented compressional strain field, which resulted in moderately strong fabrics with NW-SE oriented AMS lineations, perfectly following the Dinaridic trend recognized in Croatia. One locality, the only one with moderate tilt and rather poor statistical characteristics suggest post–Eocene CCW, while those with steep dips have well-defined paleomagnetic directions, which are aligned with the intermediate AMS direction. The positive tilt test, however, provides an overall mean direction with absurdly shallow inclinations, which suggest that we are not dealing with “real” paleomagnetic directions, but maybe with magnetic anisotropy governed NRMs.<br>The rocks in the Budva zone show a large variation in lithological sense as well as in their magnetic properties. Except a Pietra Verde localitiy, the magnetic susceptibilities are weak, we can not define AMS fabrics, yet most of the localities yielded fairly good paleomagnetic results, which suggest pre-folding age of the acquisition followed by a large CW rotation of unit.<br>From the High Karst, only a single Lower Jurassic pelagic limestone provided paleomagnetic results which exhibit CW rotation. The others had weak magnetizations, diamagnetic susceptibilities and no or scattered magnetic signals.<br>This work was financially supported by the National Development and Innovation Office of Hungary project K 128625, by the Geological Survey of Montenegro and Ministry of Science and Education of Serbia project No. 176016.</p>

Improvement of the transfer function quality indicators of the power control system at the electric drill engine shaft

In order to get better rigs performance the authors improve the schematic diagram of the power control system at the electric drill engine shaft using control input transfer function, where the electric drill is considered to be the control object which operates in conditions of a priori and current uncertainty under the influence of external perturbations. To improve the quality of the transient process under the conditions of changes in the parameters of the control object (when these parameters cannot be checked on), the authors have developed the algorithm of tuning the adaptive fuzzy PID controller based on the hybrid adaptive system. This algorithm includes the advantages of artificial neural networks and fuzzy logic. The efficiency of the algorithm with the parametric disturbance has been shown. It is concluded that the implementation of adaptive fuzzy PID controllers makes it possible to improve the quality of the transfer function of the power control system at the electric drill engine shaft when this drill operates in the indefinite conditions. The advantage of the developed algorithm is that it does not require special methods of the object parameters identification. Its implementation using modern microcontrollers is quite simple and accessible.

Process Production of Fishball Using Design of Fishball Moulding Machine in The Center of Testing The Application of Fishery (BBP2HP), Jakarta.

Meatball is round-shaped food which contains meat as the basic ingredient and it becomes an original Indonesian food. Meatball can be made or created manually by hand or meatball machine. In this the modern era, a lot of meatball sellers are using meatball machine in order to get a maximum and desired meatball results therefore the meatball machine is needed to accelerate the production process, faster than manual process.Meatball machine can produce more meatball (1000 meatballs per day) compared with manual process which can only produce 200-400 meatballs per day. This internship was carried out to learn the production design for fish meatball production in BBP2HP through Triple screw with horizontal model. It consists of three basic process such as preparation, installation, and trial phase. The equipments which are used in running this system are masks, welding goggles, gloves, electrode, work outfit, saw blades, hammers, grinders, electric drill, hacksaw, lathes, work shoes, and sigmat. Meatball machine is designed with stainless steel and can easily be used. This machine has horizontal-shaped body (Length x Height x Wide = 848 x 500 x 313 mm), 200 watt electricity, 5 kilograms grinding capacity, and 120 meatballs per minute production speed. It is suitable for home scale production with low electricity to save the cost.

Acoustic Analysis of Cylindrical, Conical and Worm Gears

The paper aims to determine the characteristic frequencies of an electric drill, by measuring and analyzing comparatively the variations of the acoustic intensity level, using the Fast Fourier Transform method (FFT). This was applied using a stand which had been specifically developed for the presented work. In two channel and multichannel systems, digital methods have been used for the calculation of cross properties as they were the only practical methods. Using digital techniques has gained considerable ground, being nowadays applied to problems once solved by resorting to analog methods. The increasing use of Fast Fourier Transform methods is found in single channel real time narrow band measurements and the Digital Filtering is replacing the Analog Filter bank which was used as the basis for real time analyzers operating with constant percentage bandwidth.

The Role of Powered Surgical Instruments in Ear Surgery: An Acoustical Blessing or a Curse?

Ear surgery in many ways lagged behind other surgical fields because of the delicate anatomical structures within the ear which leave surgeons with little room for error. Thus, while surgical instruments have long been available, their use in the ear would most often do more damage than good. This state of affairs remained the status quo well into the first half of the 20th century. However, the introduction of powered surgical instruments, specifically the electric drill used in conventional microscopic ear surgery (MES) and the ultrasonic aspirator, the Sonopet® Omni, in transcanal endoscopic ear surgery (TEES) marked major turning points. Yet, these breakthroughs have also raised concerns about whether the use of these powered surgical instruments within the confines of the ear generated so much noise and vibrations that patients could suffer sensorineural hearing loss as a result of the surgery itself. This paper reviews the intersection between the noise and vibrations generated during surgery; the history of surgical instruments, particularly powered surgical instruments, used in ear surgeries and the two main types of surgical procedures to determine whether these powered surgical instruments may pose a threat to postoperative hearing.

Spinal Extradural Arachnoid Cyst: A Case Report

Spinal extradural arachnoid cyst is a rare cause of spinal cord compression resulting in spinal myelopathy. We report a case of 12-year-old boy diagnosed with extradural thoracolumbar spinal arachnoid cyst presenting with back and leg pain, progressive left leg weakness, mild muscular atrophy and difficulty in walking. The boy presented with progressive weakness of distal left lower limb and intermittent claudication. MRI-scan revealed an extramedullary non-enhancing fluid signal intensity lesion with cord compression. The patient underwent zip laminectomy from T9 - L2 level using electric drill and total excision of the extradural cyst, microsurgical repair of the dural defect, followed by laminoplasty, using ethibond sutures was done. Intraoperative finding revealed an elongated 10 cm long cystic lesion with finger-like projections extending in the extradural space from T9 - L2 level, causing significant compression and displacement of the cord. The cyst was in communication with intradural subarachnoid space with a small ovoid-shaped arachnoid opening at T12 level on the left side adjacent to T11 nerve root. The postoperative course was uneventful and patient was discharged on postoperative day seven. Neurologically, the patient showed some improvement. On one-month follow-up, there was remarkable improvement in movement of the lower limbs. He was able to walk independently without limping gait; however, he still had mild weakness in his left leg (4+/5).Nepal Journal of Neuroscience, Volume 15, Number 2, 2018, Page: 49-54