Vehicle Body and Roll Cage Assessment involving Frontal, Side and Roll-over Crash Analysis by FEA using LS-Dyna

Simulating the vehicle collision has gained importance in the automotive sector due to its accuracy, cost effectiveness and enhanced reliability. It aids in improving the safety of driver and passenger and also examine the cause of crash or collision. This numerical analysis investigates the materials capability to enhance safety. A three-dimensional vehicle model was developed along with its roll cage using solid work tool. Hypermesh work bench was employed to discretise the sensitive parts of the body and roll cage using beam 189 element having six degree of freedom at each node. The existing structural steel members were replaced with reinforced carbon fibre in all the sensitive part of the body and roll cage and its structural stability was assessed using the frontal, side and roll over crash simulation using LS Dyna. This investigation also reveals the change in internal energy, kinetic energy absorption and momentum transfer for both structural steel and carbon fiber under all the crash scenarios. The outcomes of this numerical investigation proved that the reinforced carbon fiber can be effectively replaced with the structural steel to enhance safety.

Joint finds of knives and swords in burial complexes of the early nomads in the Southern Urals

The paper considers iron knives which have been found together with swords or daggers in burials of the early nomads of the Southern Urals. The aim of this work was to collect information about joint findings of edged weapons and knives and to determine the functional purpose of such bladed sets. This research uses data on seven joint finds of a sword/dagger and a knife in the early nomadic burials of the Southern Urals, originating from six burial grounds. The paper also addresses the issue of origins of this tradition. The functional affiliation of the object as a weapon has been determined by the localization of the knife directly on the sword or dagger in the military burial. Knives which have been found together with a dagger or a sword could represent elements of mili-tary weapons of the early nomads of the Southern Urals. Most likely, the sword scabbards had an additional pocket for knife on the frontal side. This explains the location of the knifes directly along the axis of the sword blade. Such knives probably were used as auxiliary weapons and only in a close combat. If knives are considered as a category of military auxiliary weapons, then their disappearance could be related to some kind of military «reform», expressed in appearance of heavy armed cavalry, distribution of spears, standardization of swords, daggers and arrowheads. The time of existence of such edged sets fits into the middle/second half of the 5th — turn of the 4th/3rd c. BC. A limited number of finds in the early nomadic complexes in the Southern Urals indicates a rather rare use of this weaponry element. The tradition of such edged kits possibly dates back to the nomadic cultures of Central Asia. The edged sets of a dagger and a knife have been found in tombs of the late stage of the Uyuk (Saghlyk) Culture (5th–3rd c. BC). The placement of a knife on the waist of the deceased (sometimes in the same scabbard together with dagger) during the Early Scythian and later periods suggests the conceptualization of knife as a weapon.

Forensic Engineering Analysis of Upper Extremity Nerve Entrapment Injury Mechanisms as Related to Rear-End Collisions

Nerve entrapments of the median nerve, i.e., carpal tunnel syndrome (CTS) and the ulnar nerve, i.e., cu-bital syndrome (CT) are relatively common, reflecting traumatic and atraumatic mechanisms. Claims of such injuries in relation to rear-end collisions (particularly low-velocity or < 10 mph collisions) are often contested by the defense, acknowledging that there is no obvious relationship between the collision and the claimed inju-ries. Of the collision types (frontal, side, rear-end), it is the least clear how a rear-end collision can establish mechanisms for such injuries. Direct blunt trauma to the carpal tunnel region or the cubital tunnel region are unlikely in a rear-end collision. Also, “stretch” injuries due to hypermotion of either the wrist or elbow are unlikely, reflecting occupant kinematics, vehicle interior geometry, and other factors. A case study involving CTS and CT claims as a result of a low-velocity rear-end collision will be presented.

Nursing of Repair of Partial Laryngeal Defect of Frontal Side by Suspension of Composite Hyoid Flap

<p>Objective to investigate the perioperative nursing of repairing partial laryngeal defect at frontal side by suspension of composite hyoid flap. Methods the perioperative nursing measures of 12 cases of partial laryngeal defect repaired by suspension of composite hyoid flap were retrospectively analyzed. Results 12 patients had good wound healing and retained good pronunciation, swallowing and respiration. Conclusion proper nursing measures are helpful to the healing of incision and the recovery of laryngeal pronunciation, swallowing and respiratory function after the operation of partial laryngeal defect repaired by suspension of composite hyoid flap.</p>

Impeccable Way of Administering Anesthesia using Brain Wave Sensor

In the hospitals, during major operation the patient should be anesthetized for pain free operation. Single dose anesthesia administration for prolonged operations may lead to complications. In case of insufficient anesthesia dose, the patient may feel pain and discomfort during operation. Therefore, there is need for an administration of exact dosage to the patient, at the particular time interval. An automatic anesthesia administering machine is proposed to overcome the crucial issues. The anesthesia should be given to patient in the correct dose at regular interval based on patient conscious state. The brainwave sensor is placed on the frontal side on the scalp. Brains action will be monitored constantly. When the patient gets deviated from the sleep state the correct level of anesthesia is injected by using servo motor by analyzing the brain activity. The microcontroller and brainwave sensor are interlinked using bluetooth module where the data are processed and sent to raspberry pi which gives commands to servo motor to pump the required amount of anesthesia to the patient. In addition to this heart rate and temperature of the individual are recorded.

Tectonic Transformation and Metallogenesis of the Yanshan Movement during the Late Jurassic Period: Evidence from Geochemistry and Zircon U-Pb Geochronology of the Adamellites in Xingcheng, Western Liaoning, China

The Yanshan Movement occurred mainly during the Middle-Late Jurassic, and gave rise to NE trending structures, magmatic events, volcanism and mineral resources. The transformation and evolution of the movement during the Middle-Late Jurassic were investigated from the rock assemblage, geochemistry, and chronology in adamellites which were exposed in the Xingcheng area, western Liaoning. Two types of adamellites were recognized—biotite adamellites with the formation age of 172–168 Ma and garnet-bearing adamellites of 158–152 Ma. All the samples of the two types of adamellites displayed enriched characteristics with high content of SiO2 (66.86–75.55 wt.%) and total alkali (Na2O + K2O = 7.56–8.71 wt.%), high large ion lithophile element (LILE: K, Rb, Sr), and low high field strength element (HFSE: Ce, Ta, P, Ti). The biotite adamellites belong to metaluminous-peraluminous I-type granites, and show volcanic arc granite characteristics, and were formed by partial melting of the ancient crust in the compressional setting that resulting from the subduction of the Paleo-Pacific plate beneath the north margin of the North China Craton (NCC). The garnet-bearing adamellites are also metaluminous-peraluminous I-type granites, with characteristics of both the compressional and extensional regimes, which were formed at the middle-late stages of the continuing subduction of the Paleo-Pacific plate, while simultaneously, the frontal side of the subduction slab began to roll back, leading to an extensional environment. Combining with regional geophysical studies and our petrological and geochemical studies, we propose that the eastern segment of the northern margin of NCC may have been controlled by the Paleo-Pacific tectonic domain at the latest in the Middle Jurassic, while the initiation of the tectonic regime from a compressional to an extensional environment was during the Late Jurassic (158–152 Ma) as a response of the Yanshan Movement. Simultaneously, geochronological statistics of the ore deposits in western Liaoning show that the Mesozoic endogenetic metalliferous deposits formed in a compressive environment influenced by the subduction of the Paleo-Pacific plate, similar to the magma events in ages, and the magmatism provided the thermodynamic condition and the source of metallogenic hydrothermal fluid for mineralization.

Lower Extremity Muscle Activity Patterns During Lateral (Frontal) Side Stepping Task Modulation From Different Heights

Different muscle groups function in a synchronized and coordinated manner to perform a given task, wherein the activity of one muscle group affects that of another (1, 3). Osteoarthritis (OA) is a common, chronic joint disease characterized by pain, disability and progressive loss of function. It is the most common musculoskeletal complaint worldwide and is associated with significant health and welfare costs (2, 7). The knee is the most frequently affected joint of the lower limb and prevalence of knee OA increases with age (6). Several studies have shown that muscle recruitment patterns and neuromuscular efficiency are different for patients with OA compared to normal controls during simple closed chain activities (4). However, no studies have investigated frontal plane control or the modulation of control due to, for example, a change in time or distance in OA (5).

Crossflow past a prolate spheroid at Reynolds number of 10000

The flow field around a 6:1 prolate spheroid has been investigated by means of direct numerical simulations. Contrary to earlier studies the major axis of the spheroid was oriented perpendicular to the oncoming flow. At the subcritical Reynolds number 10 000 the laminar boundary layer separated from the frontal side of the spheroid and formed an elliptical vortex sheet. The detached shear layer was unstable from its very inception and even the near-wake turned out to be turbulent. The Strouhal number associated with the large-scale shedding was 0.156, significantly below that of the wake of a sphere. A higher-frequency mode was associated with Kelvin–Helmholtz instabilities in the detached shear layer. The shape of the near-wake mirrored the shape of the spheroid. Some 10 minor diameters downstream, the major axis of the wake became aligned with the minor axis of the spheroid.