To see the other types of publications on this topic, follow the link: Final Zone.
Journal articles on the topic 'Final Zone'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Final Zone.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Silard, A. P. "Monitoring the final on-zone dynamics in TIL GTO thyristors." Electronics Letters 21, no. 16 (1985): 691. http://dx.doi.org/10.1049/el:19850489.
Full text
2
Wang, Zi Jian, Ya Xu, Wen Ting He, and Yi Sheng Zhang. "Hot Stamping of Two Different High Strength Steel with Tailored Properties." Applied Mechanics and Materials 395-396 (September 2013): 909–13. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.909.
Full textAbstract:
With the increasingly widespread application of high-strength steel (HSS), tailored properties, namely different mechanical properties required in different regions of the same part, have been proposed, in order to achieve the matching between mechanical properties and safety performance of motor vehicle parts. In this paper, the influence of air gap on the final hardness and strength distribution is discussed in terms of two different HSS, namely LG1500HS and WHT1500HF. As for steel LG1500HS, regardless of the location of samples in the formed part, the final fracture area is in the vicinity of the air gap center, proving the lowest hardness and strength in transition zones. Compared to steel LG1500HS, steel WHT1500HF exhibits gradient hardness distribution from the cooling zone to the heating zone, with no minimal value discovered in transition zones.
3
Hung, LK, KW Pang, PLC Yeung, L. Cheung, JMW Wong, and P. Chan. "Active Mobilisation after Flexor Tendon Repair: Comparison of Results following Injuries in Zone 2 and other Zones." Journal of Orthopaedic Surgery 13, no. 2 (2005): 158–63. http://dx.doi.org/10.1177/230949900501300209.
Full textAbstract:
Purpose. To prospectively study the role of active mobilisation after flexor tendon repair. Methods. The standard modified Kessler's technique was used to repair 46 digits in 32 patients with flexor tendon injuries. Early active mobilisation of the repaired digit was commenced on the third postoperative day. Range of movement was monitored and recovery from injury in zone 2 was compared with injury in other zones. Results. There were 24 and 22 injuries in zone 2 and other zones respectively. The total active motion score of the American Society for Surgery of the Hand was measured. Patients with zone-2 injuries achieved similar results to those with other-zone injuries apart from a 3-week delay in recovery. The final results were good to excellent in 71% and 77% of zone-2 and other-zone cases respectively (p<0.05). There were 2 ruptures in zone-2 and one rupture in zone-3 repairs (6.5%). Conclusion. Preliminary results of this study showed that active mobilisation following flexor tendon repair provides comparable clinical results and is as safe as conventional mobilisation programmes although recovery in patients with zone-2 injury was delayed.
4
Dulz, Simon, Toam Katz, Robert Kromer, Eileen Bigdon, Martin Stephan Spitzer, and Christos Skevas. "Reliability of the ocular trauma score for the predictability of traumatic and post-traumatic retinal detachment after open globe injury." International Journal of Ophthalmology 14, no. 10 (2021): 1589–94. http://dx.doi.org/10.18240/ijo.2021.10.17.
Full textAbstract:
AIM: To elucidate the question of whether the ocular trauma score (OTS) and the zones of injury could be used as a predictive model of traumatic and post traumatic retinal detachment (RD) in patients with open globe injury (OGI). METHODS: A retrospective observational chart analysis of OGI patients was performed. The collected variables consisted of age, date, gender, time of injury, time until repair, mechanism of injury, zone of injury, injury associated vitreous hemorrhage, trauma associated RD, post traumatic RD, aphakia at injury, periocular trauma and OTS in cases of OGI. RESULTS: Totally 102 patients with traumatic OGI with a minimum of 12mo follow-up and a median age at of 48.6y (range: 3-104y) were identified. Final best corrected visual acuity (BCVA) was independent from the time of repair, yet a statistically significant difference was present between the final BCVA and the zone of injury. Severe trauma presenting with an OTS score I (P<0.0001) or II (P<0.0001) revealed a significantly worse BCVA at last follow up when compared to the cohort with an OTS score >III. OGI associated RD was observed in 36/102 patients (35.3%), whereas post traumatic RD (defined as RD following 14d after OGI) occurred in 37 patients (36.3%). OGI associated RD did not correlate with the OTS and the zone of injury (P=0.193), yet post traumatic RD correlated significantly with zone III injuries (P=0.013). CONCLUSION: The study shows a significant association between lower OTS score and zone III injury with lower final BCVA and a higher number of surgeries, but only zone III could be significantly associated with a higher rate of RD.
5
Shackleton, R. M. "The final collision zone between East and West Gondwana: where is it?" Journal of African Earth Sciences 23, no. 3 (1996): 271–87. http://dx.doi.org/10.1016/s0899-5362(97)00002-x.
Full text
6
Acharya, Metesh N., and Giovanni Mariscalco. "Hybrid zone 0 aortic arch repair: Have we reached the final frontier?" Journal of Cardiac Surgery 36, no. 10 (2021): 3817–19. http://dx.doi.org/10.1111/jocs.15815.
Full text
7
Cencini, Alvaro. "Can the ECB save the Euro zone?" Banks and Bank Systems 11, no. 2 (2016): 81–94. http://dx.doi.org/10.21511/bbs.11(2).2016.08.
Full textAbstract:
The European project of monetary unification is under threat as never before. It is, therefore, high time to point out what went wrong and what should be done to reform the Eurosystem accordingly. This paper shows that Euro zone member countries are de facto still lacking a single currency and a monetary system that would allow for the final payment of cross-border transactions. Starting from the RTGS mechanism adopted by the Eurosystem and from a comparison with the working of domestic payment systems, it describes the changes required to transform the ECB into a bank of central banks capable to guarantee the existence of a true system of intra-European payments, with or without a single European currency (that is, with or without the loss of Euro zone countries’ monetary sovereignty)
8
Ahmad, Naveed, Sikandar Khan, Eisha Fatima Noor, Zhihui Zou, and Abdullatif Al-Shuhail. "Seismic Data Interpretation and Identification of Hydrocarbon-Bearing Zones of Rajian Area, Pakistan." Minerals 11, no. 8 (2021): 891. http://dx.doi.org/10.3390/min11080891.
Full textAbstract:
The present study interprets the subsurface structure of the Rajian area using seismic sections and the identification of hydrocarbon-bearing zones using petrophysical analysis. The Rajian area lies within the Upper Indus Basin in the southeast (SE) of the Salt Range Potwar Foreland Basin. The marked horizons are identified using formation tops from two vertical wells. Seismic interpretation of the given 2D seismic data reveals that the study area has undergone severe distortion illustrated by thrusts and back thrusts, forming a triangular zone within the subsurface. The final trend of those structures is northwest–southeast (NW–SE), indicating that the area is part of the compressional regime. The zones interpreted by the study of hydrocarbon potential include Sakessar limestone and Khewra sandstone. Due to the unavailability of a petrophysics log within the desired investigation depths, lithology cross-plots were used for the identification of two potential hydrocarbon-bearing zones in one well at depths of 3740–3835 m (zone 1) and 4015–4100 m (zone 2). The results show that zone 2 is almost devoid of hydrocarbons, while zone 1 has an average hydrocarbon saturation of about 11%.
9
Smith, Rachel M., Terence I. Walker, and William C. Hamlett. "Microscopic organisation of the oviducal gland of the holocephalan elephant fish, Callorhynchus milii." Marine and Freshwater Research 55, no. 2 (2004): 155. http://dx.doi.org/10.1071/mf01078.
Full textAbstract:
The study of chondrichthyan reproductive biology has a long history, but the structure and function of the holocephalan oviducal glands (OG) is poorly known; these organs are a vital component in the understanding of chondrichthyan life history. Histochemical techniques revealed that a fundamental zonation was evident in the OG of Callorhynchus milii, similar to most elasmobranchs. In sexually mature females, the following zones occurred (anterior to posterior): (1) club zone, periodic acid–Schiff positive (PAS+), indicating glycoprotein or any mucus substance containing neutral sugars, and Alcian blue positive, pH 2.5 (AB+), indicating the presence of sulfated and unsulfated acid glycosaminoglycans and sialoglycoproteins; (2) papillary zone (AB+); (3) baffle zone (PAS–, AB–); and (4) terminal zone (AB++). Using histological and histochemical techniques not used previously with the holocephalan group, we demonstrated that the structure and function of the OG zones were equivalent between oviparous elasmobranchs and C. milii, even though their final egg capsule morphologies differed. It was also evident that the club and papillary zones produce the egg jelly that surrounds the egg and the baffle zone formed the multilaminate egg capsule. Furthermore, the terminal zone had functions associated with sperm storage and the production of fine hairs that decorate the surface of the egg capsule.
10
Gladyr, Andrey, and Vladimir Miroshnikov. "Identification method development of focal zones based on seismic monitoring results." E3S Web of Conferences 56 (2018): 02020. http://dx.doi.org/10.1051/e3sconf/20185602020.
Full textAbstract:
Method of seismic active zones control is one of approaches of prediction of dynamic mountain pressure manifestations, which is to identify and analyze formation dynamics of seismo acoustic active zones and predict impact hazard based on revealed patterns of changes in geoacoustic activity of rock massif. The key point of this control method is the zone allocation where a potentially dangerous rock destruction source is formed. In the article, we propose an automated method for damage zone identification, based on the preliminary exclusion of background radiation by nonparametric density estimation method, the seismo acoustic active zone allocation by means of probabilistic cluster analysis and damage zone parametrization by characteristic ellipsoid selection. These tasks are part of complex geomechanical monitoring system development and are solved by upgrading and subsequent integration into the interacted software of the considered seismo acoustic active zone monitoring method. Their solution will allow to fully automate predicting dangerous state process of the controlled rock mass, improving forecast quality and significantly reducing the time spent on obtaining final result.
11
Cao, Hanxue, Chengcheng Wang, Junqi Che, et al. "Effect of Flow State of Pure Aluminum and A380 Alloy on Porosity of High Pressure Die Castings." Materials 12, no. 24 (2019): 4219. http://dx.doi.org/10.3390/ma12244219.
Full textAbstract:
Air entrapment defects prevent the heat treatment from improving the mechanical properties of die castings, which limits the die casting of high-performance components. The flow pattern of the filling process is complicated and experimental analysis is difficult in thin-walled complex die castings. In this study, we constructed a shock absorption tower to observe in real-time the filling process of pure aluminum and A380 aluminum alloy at different fast injection speeds. The degree of breakup of pure aluminum was larger than that of A380 during the filling process, which caused the porosity of pure aluminum to be greater than that of the A380 at each observation position. Re-Oh diagrams explained the difference in porosity between the two metals. The porosity in different regions was closely related to the flow state of aluminum liquid. In addition to porosity measurements, we specifically analyzed the relationship between the porosity of the flowback zone, the final filling zone, and the near-tail zone of cylinder. At the same injection velocity, the porosity at flowback zone was greater than that at the final filling position, the porosity at final filling position was larger than that at the near-tail zone of cylinder, and the final filling position changed as the injection velocity changed.
12
Torres Franco, Andrés Felipe, Nancy Vásquez Sarria, and Jenny Rodriguez Victoria. "Performance of Novel Contact Stabilization Activated Sludge System on Domestic Wastewater Treatment." Ingenieria y Universidad 19, no. 2 (2015): 7. http://dx.doi.org/10.11144/javeriana.iyu19-2.pncs.
Full textAbstract:
A pilot-scale study was conducted to evaluate a traditional contact stabilization activated sludge system (CSASC) and a modified CSAS (CSASM) treating domestic wastewater. The CSASC system was comprised of a contact reactor (CR), a stabilization reactor (SR) and a secondary settler (SS); the CSASM included a second CR, a second SS (CR2 and SS2), and a modified SR (SRM) divided into four zones: an attached-suspended growth zone which allowed the system to reach an average sludge retention time close to 36 d and favored the occurrence of nitrification; an anoxic zone for denitrification occurrence; an aerated suspended growth zone with a high presence of organic carbon; and an additional aerated suspended growth zone with a high ammonia concentrations environment. The CSASC’s removal efficiencies of chemical oxygen demand (COD) and total ammonia nitrogen (TAN) were respectively 94±4 % and 53±12%; whereas CSASM’s efficiencies were 88±7% for COD and 92±7% for TAN. Concentrations of TAN and NO3 --N in the CSASC’s final effluent were 14.3±5.2 and 5.0±2.9 mg×L-1; and 4.8±4.4 and 9.1±5.8 mg×L-1 in the CSASM’s final effluent. Results demonstrated that the proposed configuration obtained higher nitrogen removal efficiencies than traditional CSAS.</p>
13
Jouini, Belgacem, Mourad Bouterra, Cafsi El, and Ali Belghith. "Numerical study of the structure of thermal plume in a vertical channel: Effect of the height of canal." Thermal Science 20, no. 1 (2016): 67–76. http://dx.doi.org/10.2298/tsci130123058j.
Full textAbstract:
In this paper we propose to study numerically, by means of a software Named Calculation FDS, a thermal plume evolve from a source at the entrance to of a vertical channel. In the literature, there are researchers who interested in the interaction of plume with his the confinement medium. These studies are based on the determination of the global structure of plume confined. They found that this plume consists of three distinct zones. A first zone near source (instability zone) followed by a second zone, such as the development of plume, and a third zone which is the zone of turbulence, Comparing the overall structure of the plume confined to that of the free plume, we can identify the presence of a third zone (zone of instability). The aim is firstly to determine the height of the instability zone located above of source, and secondly, to make a spectral study frequencies exhaust. Thus, effects of the geometrical parameters on frequencies of these escapements and the height an instability zone. The final aim is to establish correlations between the dimensionless numbers of Strouhal and Grashof.
14
Soros, Connie L., and Nancy G. Dengler. "Leaf morphogenesis and growth in Cyperus eragrostis (Cyperaoeae)." Canadian Journal of Botany 74, no. 11 (1996): 1753–65. http://dx.doi.org/10.1139/b96-212.
Full textAbstract:
We identified the zones of leaf extension, cell division, cell elongation, and cell differentiation in developing leaves of a sedge species, Cyperus eragrostis Lam. (Cyperaceae). The zone of leaf extension was located by measuring the separation between pinhole markers and by observing the staining pattern of Calcofluor White after pulse-labelling growing leaves. These observations were supported by determining growth rates of control and punctured leaves and by scanning electron and light microscopy of developing leaves. The location of the zone of cell division was assessed by enumerating mitotic figures, and the zone of cell elongation was established by measuring lengths of epidermal cells in cleared leaves. These studies indicated that the zone of leaf elongation is within the basal 10–15 mm of a leaf and that cell divisions are restricted to the basal 0.2–1 mm. Radial enlargement of internal tissues begins in the basal half of the elongation zone and cells are fully differentiated within a short distance above it. Expanding leaves can be divided into three zones: zone 1, a basal meristematic zone where cell division and some cell elongation occur; zone 2, a zone above the base where cells are elongating but cell division has ceased; and zone 3, a zone where elongation is complete and cells have reached their final length. This pattern of leaf development is similar to, but more condensed than, feat found in the related monocotyledonous family, the Poaceae. Keywords: Cyperus eragrostis, leaf development, leaf extension zone, Cyperaceae, cell enlargement.
15
Malik, Sanjeev, Y. M. M. Zhang, Mohammed Al Asimi, and Thomas L. Gould. "Steamflood With Vertical Injectors and Horizontal Producers in Multiple Zones." SPE Reservoir Evaluation & Engineering 14, no. 02 (2011): 161–70. http://dx.doi.org/10.2118/129248-pa.
Full textAbstract:
Summary The Mukhaizna heavy-oil field in the Sultanate of Oman desert has three distinct zones that require steam injection to enhance oil recovery. A new, geocellular-based reservoir description was prepared to evaluate the steamflood performance of these three zones using different horizontal- and vertical-well configurations. On the basis of the results of thermal simulations, the final design called for vertical wells injecting steam into all three zones, with three stacked horizontal production (HP) wells, one for each zone. One advantage of this design is the ability to control the steam flux from each vertical injector (VI) into each zone to mitigate early steam breakthrough and optimize recovery. After 2 years of steam injection, oil production is tracking the thermal model nicely.
16
Gréa, B. J., and A. Ebo Adou. "What is the final size of turbulent mixing zones driven by the Faraday instability?" Journal of Fluid Mechanics 837 (December 21, 2017): 293–319. http://dx.doi.org/10.1017/jfm.2017.837.
Full textAbstract:
Miscible fluids of different densities subjected to strong time-periodic accelerations normal to their interface can mix due to Faraday instability effects. Turbulent fluctuations generated by this mechanism lead to the emergence and the growth of a mixing layer. Its enlargement is gradually slowed down as the resonance conditions driving the instability cease to be fulfilled. The final state corresponds to a saturated mixing zone in which the turbulence intensity progressively decays. A new formalism based on second-order correlation spectra for the turbulent quantities is introduced for this problem. This method allows for the prediction of the final mixing zone size and extends results from classical stability analysis limited to weakly nonlinear regimes. We perform at various forcing frequencies and amplitudes a large set of homogeneous and inhomogeneous numerical simulations, extensively exploring the influence of initial conditions. The mixing zone widths, measured at the end of the simulations, are satisfactorily compared to the predictions, and bring a strong support to the proposed theory. The flow dynamics is also studied and reveals the presence of sub-harmonic as well as harmonic modes depending on the initial parameters in the Mathieu phase diagram. Important changes in the flow anisotropy, corresponding to the large scale structures of turbulence, occur. This phenomenon appears directly related to the orientation of the most amplified gravity waves excited in the system, evolving due to the enlargement of the mixing zone.
17
Meng, Yu, and Hua Yan. "Prognostic Factors for Open Globe Injuries and Correlation of Ocular Trauma Score in Tianjin, China." Journal of Ophthalmology 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/345764.
Full textAbstract:
Purpose. To investigate prognostic factors that influence the final visual acuity (VA) and to correlate the ocular trauma score (OTS) with the final VA in open globe injuries.Methods. A retrospective review of 298 patients with open globe injuries admitted to Tianjin Medical University General Hospital was carried out from January 1, 2010, till December 31, 2014. Prognostic factors influencing the final VA in patients with open globe injuries and the correlation between OTS and the final VA were examined.Results. Three hundred and fourteen eyes from 298 patients with open globe injuries were analyzed. Males had a higher rate of open globe injury than females (83.56% versus 16.44%). Mean age was 45.46 ± 17.48 years (5–95 years). In a univariate analysis, prognostic factors influencing the final VA included initial VA, relative afferent papillary defect (RAPD), vitreous hemorrhage, lens injury, endophthalmitis, hyphema, retinal detachment, and the zone of injury. In a multiple logistic regression analysis, initial VA, RAPD, and the zone of injury were considered to be independent risk factors. The OTS correlated with final VA (r=0.988,p=0.000).Conclusion. In our study, the most important prognostic factors influencing the final VA were initial VA, RAPD, and the zone of injury. The OTS was of great importance for patients and ophthalmologists.
18
Ma, Qingna, Fei Shao, Linyue Bai, Qian Xu, Xingkun Xie, and Mei Shen. "Corrosion Fatigue Fracture Characteristics of FSW 7075 Aluminum Alloy Joints." Materials 13, no. 18 (2020): 4196. http://dx.doi.org/10.3390/ma13184196.
Full textAbstract:
The corrosion fatigue properties and fracture characteristics of friction stir welding joints of 7075 aluminum alloys were studied via corrosion fatigue tests, electrochemical measurements, and corrosion fatigue morphology and microstructure observations. The results show that the corrosion fatigue crack of the friction stir welding (FSW) joint of 7075 aluminum alloys originated in the junction zone between the thermomechanically affected zone and the weld nugget zone. The corrosion fatigue life of the joint decreased with increasing stress amplitude, with an S–N curve equation of lgN = 5.845 − 0.014S. Multiple crack sources were observed in the corrosion fatigue fracture. The main crack source originated from the corrosion pits at the interface between the thermomechanically affected zone and the weld nugget zone due to the influence of the coarse microstructure and the large potential difference between both zones. Corrosion morphologies of a rock candy block and an ant nest appeared in the crack propagation zone and the grain boundary of the weld nugget zone. In addition, fatigue speckles and intergranular fractures were observed, as well as brittle fracture characterized by cleavage steps and secondary cracks in the final fracture zone.
19
Sharp, R. V., K. E. Budding, J. Boatwright, et al. "Surface faulting along the Superstition Hills fault zone and nearby faults associated with the earthquakes of 24 November 1987." Bulletin of the Seismological Society of America 79, no. 2 (1989): 252–81. http://dx.doi.org/10.1785/bssa0790020252.
Full textAbstract:
Abstract The M 6.2 Elmore Desert Ranch earthquake of 24 November 1987 was associated spatially and probably temporally with left-lateral surface rupture on many northeast-trending faults in and near the Superstition Hills in western Imperial Valley. Three curving discontinuous principal zones of rupture among these breaks extended northeastward from near the Superstition Hills fault zone as far as 9 km; the maximum observed surface slip, 12.5 cm, was on the northern of the three, the Elmore Ranch fault, at a point near the epicenter. Twelve hours after the Elmore Ranch earthquake, the M 6.6 Superstition Hills earthquake occurred near the northwest end of the right-lateral Superstition Hills fault zone. Surface rupture associated with the second event occurred along three strands of the zone, here named North and South strands of the Superstition Hills fault and the Wienert fault, for 27 km southeastward from the epicenter. In contrast to the left-lateral faulting, which remained unchanged throughout the period of investigation, the right-lateral movement on the Superstition hills fault zone continued to increase with time, a behavior that was similar to other recent historical surface ruptures on northwest-trending faults in the Imperial Valley region. We measured displacements over 339 days at as many as 296 sites along the Superstition Hills fault zone, and repeated measurements at 49 sites provided sufficient data to fit with a simple power law. Data for each of the 49 sites were used to compute longitudinal displacement profiles for 1 day and to estimate the final displacement that measured slips will approach asymptotically several years after the earthquakes. The maximum right-lateral slip at 1 day was about 50 cm near the south-central part of the North strand of Superstition Hills fault, and the predicted maximum final displacement is probably about 112 cm at Imler Road near the center of the South strand of the Superstition Hills fault. The overall distributions of right-lateral displacement at 1 day and the estimated final slip are nearly symmetrical about the midpoint of the surface rupture. The average estimated final right-lateral slip for the Superstition Hills fault zone is about 54 cm. The average left-lateral slip for the conjugate faults trending northeastward is about 23 cm. The southernmost ruptured member of the Superstition Hills fault zone, newly named the Wienert fault, extends the known length of the zone by about 4 km. The southern half of this fault, south of New River, expressed only vertical displacement on a sinuous trace. The maximum vertical slip by the end of the observation period there was about 25 cm, but its growth had not ceased. Photolineaments southeast of the end of new surface rupture suggest continuation of the Superstition Hills fault zone in farmland toward Mexico.
20
Zhu, Qing Feng, Jia Wang, Lei Li, Chun Yan Ban, Zhi Hao Zhao, and Jian Zhong Cui. "Effect of Forging Temperature on Deformability and Structure Evolution of High Purity Aluminium during Multi-Directional Forging Process." Materials Science Forum 877 (November 2016): 371–79. http://dx.doi.org/10.4028/www.scientific.net/msf.877.371.
Full textAbstract:
The effects of final forging temperatures on deformability and structure evolution of high purity aluminum during multi-directional forging process were investigated. The results showed that increasing the initial forging temperature is beneficial for controlling the sample shape in the initial forging passes. Recrystallization during the initial forging passes improves the deformability of the sample in the following low-temperature forging processes. An X-shape fine grain zone is formed in the sample due to the inhomogeneous deformation of multi-directional forging process. When the forging pass is 6, the final forging temperature has an important influence on the grain size in the fine grain zone. The grain size decreases from 302 μm to 60 μm with the final forging temperature decreasing from 310 °C to 65 °C. The X-shape fine grain zone caused by the inhomogeneous deformation cannot be eliminated by increasing the final forging temperature (even higher than the recrystallization temperature of high purity aluminium).
21
Soltani, Nemat, Mahmoud Saffarzadeh, and Ali Naderan. "Multi-Level Crash Prediction Models Considering Influence of Adjacent Zonal Attributes." Civil Engineering Journal 5, no. 3 (2019): 649. http://dx.doi.org/10.28991/cej-2019-03091276.
Full textAbstract:
This study investigates factors affecting accidents across transport facilities and modes, using micro and macro levels variables simultaneously while accounting for the influence of adjacent zones on the accidents occurrence in a zone. To this end, 15968 accidents in 96 traffic analysis zones of Tehran were analyzed. Adverting to the multi-level structure of accidents data, the present study adopts a multilevel model for its modeling processes. The effects of the adjacent zones on the accidents which have occurred in one zone were assessed using the independent variables obtained from the zones adjacent to that specific zone. A Negative Binomial (NB) model was also developed, and results show that the multilevel model that considers the effect of adjacent zones shows a better performance compared to the multilevel model that does not consider the adjacent zones’ effect and NB model. Moreover, the final models show that at intersections and road segments, the significant independent variables are different for each mode of transport. Adopting a comprehensive approach to incorporate a multi-level, multi-resolution (micro/macro) model accounting for adjacent zones’ influence on multi-mode, multi-segment accidents is the contribution of this paper to accident studies.
22
Dong, Guo Jun, and Ming Wang. "Modeling of Error Analysis Simulation of Normal Circular Arc Bevel Gear Transmission." Key Engineering Materials 589-590 (October 2013): 606–10. http://dx.doi.org/10.4028/www.scientific.net/kem.589-590.606.
Full textAbstract:
The normal circular arc bevel gears are used in industrial areas of high speed, high bearing and high strength widely. A mathematical simulation model is built and it can analyze transmission error and contact zone of normal circular arc bevel gears. In this model, the instantaneous engaging points of gear pair are transformed into the least-values of rotary angles of corresponding points between two gears along the final motion, so this method is very simple and effective. Under the condition of existing helix angle error, transmission error and contact zone of a pair of normal circular arc bevel gears are simulating analyzed. At last, the operation test of contact zone of gears indicates gears transmission is stable and the gears contact zones are largely in line with the simulation results.
23
Dobrowolski, Krzysztof, and Grzegorz Pawłowski. "Economic Growth in the Euro Zone Countries and Other Member States of the European Union in the Years 2006 - 2017 - Comparative Analysis." SHS Web of Conferences 57 (2018): 01011. http://dx.doi.org/10.1051/shsconf/20185701011.
Full textAbstract:
The aim of the conducted research is to verify III hypotheses. Hypothesis I: changes in GDP and its components should demonstrate higher dynamics in the euro zone countries than in countries using national currencies, taking into account differences in their level of economic development. Hypothesis II: in countries that joined the euro zone during the period under examination, the analyzed indicators should demonstrate higher dynamics after the adoption of the common currency. Hypothesis III: the index of final consumption expenditure of general government should demonstrate lower dynamics in the euro zone countries and a decline in dynamics after the adoption of the euro in the countries that have done so during the period considered. Statistical material was analyzed. Data on GDP dynamics, investments, final consumption expenditure of households and non-profit institutions serving households (later referred to as: "final consumption expenditure"), final consumption expenditure of general government, export and import were used. The research methods used were: the method of analysis and logical construction and a statistical one. The hypotheses tested were only partially confirmed.
24
Schweinberger, Martin. "Speech-unit final like in Irish English." English World-Wide 41, no. 1 (2020): 89–117. http://dx.doi.org/10.1075/eww.00041.sch.
Full textAbstract:
Abstract This paper investigates the use of speech-unit final like (SUF like) in standard Irish English (IrE) and takes a variationist approach based on the Irish component of the International Corpus of English (ICE-IRL). The analysis includes both sociolinguistic factors (age, gender, occupation type, religious affiliation, conversation type, audience size, type and zone of residence) and a psycholinguistic factor (priming). The statistical analysis extends previous research on SUF like in that it applies the principle of accountability and shows that priming significantly facilitates SUF like use, that SUF like has increased between an earlier (1990–1994) and a later phase (2002–2005) of data collection and that, between 2002 and 2005, SUF like use correlates negatively with audience size but not so in data collected between 1990 and 1994. The relative absence of significant social stratification of SUF like use suggests that SUF like continues to be a frequent feature of standard IrE and substantiates that it is a linguistic marker of Irish identity.
25
Stock, J., and C. Abad. "Recovery of the Astrographic Catalogue." Symposium - International Astronomical Union 133 (1988): 171–76. http://dx.doi.org/10.1017/s0074180900139580.
Full textAbstract:
An almost fully automatic scheme has been developed which produces final positions in the system determined by the reference catalogue, cross identifications, and approximate magnitudes in a standard system. A plate-overlap method is used which permits inclusion of higher order terms either plate by plate or common to a subset of plates. Magnitude dependent errors are also included. The system has already been applied to more than 500 plates, most of them of the Paris zone, with smaller sets of the Oxford, Potsdam, and Helsingfors zones. The Paris zone yields consistent higher order and magnitude terms over the entire set analyzed so far.
26
Shi, L., SA Alexandratos, and NP O’Dowd. "Combined finite element and phase field method for simulation of austenite grain growth in the heat-affected zone of a martensitic steel weld." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 233, no. 1 (2018): 13–27. http://dx.doi.org/10.1177/1464420717750999.
Full textAbstract:
Engineering components operating at high temperature often fail due to the initiation and growth of cracks in the heat-affected zone adjacent to a weld. Understanding the effects of microstructural evolution in the heat-affected zone is important in order to predict and control the final properties of welded joints. This study presents a combined finite element method and phase field method for simulation of austenite grain growth in the heat-affected zone of a tempered martensite (P91) steel weld. The finite element method is used to determine the thermal history of the heat-affected zone during gas tungsten arc welding of a P91 steel plate. Then, the calculated thermal history is included in a phase field model to simulate grain growth at various positions in the heat-affected zone. The predicted mean grain size and grain distribution match well with experimental data for simulated welds from the literature. The work lays the foundation for optimising the process parameters in welding of P91 and other ferritic/martensitic steels in order to control the final heat-affected zone microstructure.
27
Kok, Bram, Frederik Schuit, Arthur Lieveld, Kaoutar Azijli, Prabath WB Nanayakkara, and Frank Bosch. "Comparing lung ultrasound: extensive versus short in COVID-19 (CLUES): a multicentre, observational study at the emergency department." BMJ Open 11, no. 9 (2021): e048795. http://dx.doi.org/10.1136/bmjopen-2021-048795.
Full textAbstract:
BackgroundBedside lung ultrasound (LUS) is an affordable diagnostic tool that could contribute to identifying COVID-19 pneumonia. Different LUS protocols are currently used at the emergency department (ED) and there is a need to know their diagnostic accuracy.DesignA multicentre, prospective, observational study, to compare the diagnostic accuracy of three commonly used LUS protocols in identifying COVID-19 pneumonia at the ED.Setting/patientsAdult patients with suspected COVID-19 at the ED, in whom we prospectively performed 12-zone LUS and SARS-CoV-2 reverse transcription PCR.MeasurementsWe assessed diagnostic accuracy for three different ultrasound protocols using both PCR and final diagnosis as a reference standard.ResultsBetween 19 March 2020 and 4 May 2020, 202 patients were included. Sensitivity, specificity and negative predictive value compared with PCR for 12-zone LUS were 91.4% (95% CI 84.4 to 96.0), 83.5% (95% CI 74.6 to 90.3) and 90.0% (95% CI 82.7 to 94.4). For 8-zone and 6-zone protocols, these results were 79.7 (95% CI 69.9 to 87.6), 69.0% (95% CI 59.6 to 77.4) and 81.3% (95% CI 73.8 to 87.0) versus 89.9% (95% CI 81.7 to 95.3), 57.5% (95% CI 47.9 to 66.8) and 87.8% (95% CI 79.2 to 93.2). Negative likelihood ratios for 12, 8 and 6 zones were 0.1, 0.3 and 0.2, respectively. Compared with the final diagnosis specificity increased to 83.5% (95% CI 74.6 to 90.3), 78.4% (95% CI 68.8 to 86.1) and 65.0% (95% CI 54.6 to 74.4), respectively, while the negative likelihood ratios were 0.1, 0.2 and 0.16.ConclusionIdentifying COVID-19 pneumonia at the ED can be aided by bedside LUS. The more efficient 6-zone protocol is an excellent screening tool, while the 12-zone protocol is more specific and gives a general impression on lung involvement.Trial registration numberNL8497.
28
Cawood, Peter A., Jeroen A. M. van Gool, and Greg R. Dunning. "Geological development of eastern Humber and western Dunnage zones: Corner Brook–Glover Island region, Newfoundland." Canadian Journal of Earth Sciences 33, no. 2 (1996): 182–98. http://dx.doi.org/10.1139/e96-017.
Full textAbstract:
The Corner Brook–Glover Island region records the development of the internal domain of the Humber Zone and its relationship to the adjoining external domain and Dunnage Zone. The region preserves both the Laurentian margin basement–cover contact and the siliciclastic–carbonate transition within the cover sequence. Precambrian Grenville basement of the Corner Brook Lake Complex is the oldest lithostratigraphic unit and yielded a U/Pb zircon age of 1510 ± 6 Ma. Three main lithostratigraphic assemblages overlie basement: silicic and mafic igneous rocks of the Lady Slipper Pluton which yielded a U/Pb zircon age of [Formula: see text] Ma; siliciclastic lithologies which include the South Brook and Summerside formations; and carbonate-dominated sequences with clastic incursions which include the Port au Port, St. George, and Table Head groups, and the Breeches Pond, Irishtown, and Pinchgut formations. Dunnage Zone units include plutonic ultramafic to mafic rocks of the Grand Lake Complex, dated by U/Pb zircon from trondhjemite at 490 ± 4 Ma, volcanic and epiclastic rocks of the Glover Island Formation, and the Matthews Brook Serpentinite, the latter restricted to fault slivers within the Humber Zone sequence. The deformed Glover Island Granodiorite intrudes the Dunnage Zone rocks on Glover Island and is dated by U/Pb zircon and titanite at 440 ± 2 Ma. Little deformed Carboniferous sedimentary rocks unconformably overlie both Humber Zone and Dunnage Zone rock units. Timing of regional deformation and peak amphibolite-facies metamorphism in the eastern Humber Zone is constrained by isotopic data to the Early Silurian. In the Dunnage Zone, shear zones and foliation development both pre- and postdate the age of the Glover Island Granodiorite, with the later possibly temporally equivalent to deformation in the Humber Zone. Final juxtaposition of the two zones occurred during Carboniferous movement of the Cabot Fault.
29
Mazloom, Ali, Valerie K. Reed, Fernando Cabanillas, et al. "Marginal Zone Lymphoma: Factors That Affect the Final Outcome, a Study of 275 Patients." Blood 112, no. 11 (2008): 3764. http://dx.doi.org/10.1182/blood.v112.11.3764.3764.
Full textAbstract:
Abstract Purpose: Retrospective review and analysis of 275 patients with marginal zone lymphoma (MZL) to determine the prognostic factors that affect outcome in an effort to find a specific prognostic score. Materials and Methods: Two hundred and seventy five patients with pathologically confirmed MZL were studied. Their median age was 60 years (range 18–89). Male sex was found in 123 patients (45%). Ann Arbor stage I was present in 104 patients (38%), stage II in 27 (10%), stage III in 16 (6%), stage IV in 124 (45%), and unknown in 4 (1%). Most patients were asymptomatic at presentation (90%), with 96% presenting with Zubrod score of 0 or 1. Patients were divided into three groups according to sites of involvement: extranodal (211), nodal (27), and splenic (37). Treatment strategy consisted of: observation in 75 (27%), chemotherapy in 103 (37%), combined chemotherapy and radiation in 24 (9%), and definitive radiation in 71 (26%). Results: Both univariate and multivariate analysis showed that splenic presentation had a better outcome with a hazard ratio (HR) of 0.14 and p value=0.006, while extranodal presentation with bone marrow involvement had an inferior outcome with HR of 2.27 and p value =0.045. Two factors were found to be associated with decreased overall survival (OS) in the multivariate analysis: Older age (p=0.007) and beta 2 microglobulin >1.8 mg/L (p <0.0001). On the other hand splenic presentation and being asymptomatic at presentation were associated with an improved OS with a p value of 0.002 and 0.017, respectively. Stage at presentation had no impact on the overall survival or disease free survival, and although all patients with splenic MZL were stage IV, these patients had the best outcome. Nodal presentation had a similar survival to extranodal presentation. Conclusion: Splenic presentation even at advanced stage is associated with a better outcome. Bone marrow involvement in patients with extranodal presentation had a lower OS. Older age, high beta 2 microglobulin, and symptoms at presentation adversely affected the overall survival of patients with MZL.
30
Thenhaus, P. C., D. M. Perkins, S. T. Algermissen, and S. L. Hanson. "Earthquake Hazard in the Eastern United States: Consequences of Alternative Seismic Source Zones." Earthquake Spectra 3, no. 2 (1987): 227–61. http://dx.doi.org/10.1193/1.1585427.
Full textAbstract:
The regional variability in expected ground motion associated with six different characterizations of seismic source zones for probabilistic ground motion assessment is examined for the eastern United States. Three of the seismic source zone models are based on types of geologic structure: (1) regions characterized by late-Precambrian faulting; (2) middle-to-late Paleozoic thrust tectonics; and (3) early-to-middle Mesozoic extensional features. Two other seismic source zone configurations considered are based on data related to vertical crustal movements, and the final source zone model investigated is that of Algermissen and others (1982). Maintaining the same maximum magnitude among all zones and for all source zone configurations, a comparison of results indicates a factor of 3 difference among source zone models for calculated acceleration levels in eastern Massachusetts, southeastern Maine, and the Cape Fear arch of eastern North Carolina; a factor of about 2 or greater difference for most other eastern seaboard areas; and a factor of 1.5 or less for much of the Appalachian region extending from New Brunswick to the Gulf Coast. Results show that certain source zone models based exclusively on speculative geologic hypotheses result in considerably lower ground-motion hazard than otherwise implied by accepting historical seismicity as a guide to future hazard. Significantly, variation in the seismic hazard estimates at probability levels of 1 in 500 due to uncertain earthquake causal structures or processes is considerably higher in the heavily populated northeast region than in the Charleston, South Carolina, area.
31
Jiang, Hao, Chao Xue, Yanlin Gao, and Yan Wang. "Analysis of Ocular Injury Characteristics in Survivors of the 8.12 Tianjin Port Explosion, China." Journal of Ophthalmology 2019 (August 7, 2019): 1–7. http://dx.doi.org/10.1155/2019/1360805.
Full textAbstract:
Introduction. On the evening of August 12, 2015, a large chemical explosion occurred at Tianjin Port. We analyzed ocular injury characteristics in the survivors of this accident. Methods. Twenty injured eyes of 17 hospitalized patients were included. Initial best-corrected visual acuity (BCVA), injury type, injury cause, relative afferent pupillary defect (RAPD), zone of injury (ZOI), and ocular trauma score (OTS) were evaluated. Final BCVA and enucleation were the final outcome index. The relationship between risk factors and final outcomes was analyzed. Results. The patients comprised 14 males and 3 females (mean age, 35.24 ± 12.68 years). Eighteen eyes had open-globe and 2 had closed-globe injuries. Fifteen ocular injury types were reported. Initial visual acuity (VA) was 20/50 to 20/200, 20/200 to finger counting (FC), hand motion to light perception (HM-LP), and no light perception (NLP) in 2, 7, 7, and 4 eyes, respectively. RAPD was found in 5 eyes. Most eyes sustained severe injuries with OTSs of 1 (25%) and 2 (40%). Of the injured eyes, 50% had Zone III injuries. In 95% of the injured eyes, glass was the cause of injury. Three of 4 eyes with an initial VA of NLP had a final VA of NLP and an outcome of enucleation. In 5 eyes with RAPD, 3 had a final VA of NLP and a final outcome of enucleation. Eyes with lower OTSs generally had poorer outcomes. All eyes with a final VA of NLP and an enucleation outcome had Zone III injuries. All 3 eyes with an enucleation outcome had retinal injuries, whereas eyes with no retinal injury had a better final BCVA. Conclusions. Explosions can inflict severe ocular trauma, even indoors; 90% of injured eyes had open-globe injuries caused by glass fragments. Initial NLP, RAPD, low OTS, posterior extended wound, and retinal injury indicate a poor final outcome.
32
Zeng, Zhixiong, Yu-Jun Cui, Feng Zhang, Nathalie Conil, and Jean Talandier. "Effect of technological voids on swelling behaviour of compacted bentonite–claystone mixture." Canadian Geotechnical Journal 57, no. 12 (2020): 1881–92. http://dx.doi.org/10.1139/cgj-2019-0339.
Full textAbstract:
The effect of technological voids on the swelling pressure of compacted MX80 bentonite–Callovo-Oxfordian (COx) claystone mixture was investigated by simulating the technological voids with a pre-defined space between the compacted disks of the mixture. Both axial and radial swelling pressures were monitored. After the tests, the microstructure of samples at different positions was investigated using mercury intrusion porosimetry (MIP), together with the determination of dry density and water content. Results showed that two main processes, filling and homogenization, occurred during soil hydration. In the filling process, the initial technological voids were gradually filled and the axial swelling pressure tended to increase. In the homogenization process, the samples had a sealing zone and a swelling zone. The sealing zone was characterized by a lower dry density than the expected final dry density while the swelling zone was characterized by a larger one. From the MIP results, the sealing zone showed larger inaccessible-pore, medium-pore, and large-pore void ratios and a lower small-pore void ratio than the swelling zone. Over time, the medium and large pores in the sealing zone were compressed, while the small pores in the swelling zone decreased. The stabilized axial swelling pressure followed a unique relationship with the expected final dry density. Moreover, the swelling pressure anisotropy was found to decrease as the technological voids increased.
33
Gázquez, Ayelén, Hamada Abdelgawad, Geert Baggerman, et al. "Redox homeostasis in the growth zone of the rice leaf plays a key role in cold tolerance." Journal of Experimental Botany 71, no. 3 (2019): 1053–66. http://dx.doi.org/10.1093/jxb/erz455.
Full textAbstract:
Abstract We analysed the cellular and molecular changes in the leaf growth zone of tolerant and sensitive rice varieties in response to suboptimal temperatures. Cold reduced the final leaf length by 35% and 51% in tolerant and sensitive varieties, respectively. Tolerant lines exhibited a smaller reduction of the leaf elongation rate and greater compensation by an increased duration of leaf growth. Kinematic analysis showed that cold reduced cell production in the meristem and the expansion rate in the elongation zone, but the latter was compensated for by a doubling of the duration of cell expansion. We performed iTRAQ proteome analysis on proliferating and expanding parts of the leaf growth zone. We identified 559 and 542 proteins, of which 163 and 210 were differentially expressed between zones, and 96 and 68 between treatments, in the tolerant and sensitive lines, respectively. The categories protein biosynthesis and redox homeostasis were significantly overrepresented in the up-regulated proteins. We therefore measured redox metabolites and enzyme activities in the leaf growth zone, demonstrating that tolerance of rice lines to suboptimal temperatures correlates with the ability to up-regulate enzymatic antioxidants in the meristem and non-enzymatic antioxidants in the elongation zone.
34
Zilitinkevich, S. S., and J. G. B. Malm. "A Theoretical Model of Thermal Bar Movement in a Circular Lake." Hydrology Research 24, no. 1 (1993): 13–30. http://dx.doi.org/10.2166/nh.1993.0002.
Full textAbstract:
The present paper concentrates on the movement of the spring thermal bar with time, and a simple theoretical model is derived for the case of an axisymmetric circular lake. The lake is considered to consist of three different zones: 1) a nearshore stably stratified warm water zone, 2) the thermal bar zone of descending water with temperature approximately equal to that of maximum density, and 3) an offshore cold unstably stratified zone. The basis for the model is the heat budget equation, where horizontal dynamical heat exchange in the vicinity of the bar zone is taken into account. In comparison with a previous model (Zilitinkevich et al. 1991), describing an infinite wedge of water, the present model is more general and takes into account the effect of shore-line curvature. This effect is characterized by a non-dimensional number and causes a marked increase in the displacement rate of the bar at the final stage of its existence. Model predictions are also compared with field data taken from the literature.
35
Howard, L. N., and G. Veronis. "The salt-finger zone." Journal of Fluid Mechanics 183 (October 1987): 1–23. http://dx.doi.org/10.1017/s0022112087002490.
Full textAbstract:
In order to investigate the stability of infinitely long fully developed salt fingers Stern (1975) has proposed a model in which the basic configuration is independent of the vertical and is sinusoidal in the horizontal direction, with constant background gradients of temperature and salinity. The present study deals with a model of finite vertical extent where τ, the ratio of the diffusivities of salt and heat, is small, and where the constant background salt gradient is replaced by a salt difference between the reservoirs above and below a salt-finger region of finite depth. Steady-state solutions in two and three dimensions are obtained for the zero-order (τ = 0) state in which rising (sinking) fingers have the salinity of the lower (upper) reservoir. For two-dimensional fingers the horizontal scale corresponding to maximum buoyancy flux turns out to be 1.7 times the buoyancy-layer scale associated with the background stable temperature gradient. Heat, salt and buoyancy fluxes are calculated. A boundary-layer analysis is given for the (salt) diffusive correction to the zero-order solution. The same set of calculations is carried out for salt fingers in a Hele-Shaw cell. An assessment of Schmitt's (1979a) model of a finger zone of finite depth shows that the parametric restrictions required by the model cannot be satisfied when Stern's idealization is used for the final state. The present model appears to be preferable for constructing a Schmitt-like theory for τ [Lt ] 1.
36
Homayoun, Pouria, and Mostafa Ketabchi. "Effect of Strain Rate on Metal Flow Pattern in T-Section Extrusion Process." Key Engineering Materials 491 (September 2011): 241–47. http://dx.doi.org/10.4028/www.scientific.net/kem.491.241.
Full textAbstract:
Extrusion is a deformation process used in metal sections fabrication. Metal flow pattern during extrusion process is of great importance. How circular initial section of billet changes to final section provides more details of extrusion process, and plays an important role in optimizing the extrusion energy. Extrusion in flat-faced die, without intermediate section, needs much more energy than is required for die having intermediate section. The aim of this study was to investigate the effect of strain rate on metal flow pattern in T-section extrusion process. Four different ram speeds were applied to realize how the shape and position of intermediate section would be affected. Flat-faced die with “T” final section was designed and manufactured. Straight layout of metal was of top concern in die design. Commercial purity aluminum, Al 99.5, was extruded in flat-faced die in hot condition. Graphite was used as lubricant in deformation process. After partial extrusion of billets, the residual part of billets pounced out of container and then mounted for metallographic tests. This part of billets consisted of dead-metal zone and deformation zone. Then, step-by-step decreasing of specimen height followed by macro-etching of metal surface paved the way for determining the metal flow pattern. An egg-shaped intermediate section appeared between initial round section and final “T” section. The size and position of the intermediate section changed by varying the strain rate of extrusion process; It was also revealed that as the strain rate of extrusion process is increased, the dead-metal zones become narrower and the dead-metal zone semi angle increases.
37
RAJESH, H. M. "Characterization and origin of a compositionally zoned aluminous A-type granite from South India." Geological Magazine 137, no. 3 (2000): 291–318. http://dx.doi.org/10.1017/s001675680000399x.
Full textAbstract:
The Pan-African Ambalavayal granite intrudes the high-grade metamorphic terrain of northern Kerala, South India and is spatially associated with the Moyar and Calicut lineaments. The pluton was aligned nearly parallel to the northeast–southwest and east–west faults in the basement, consistent with magma ascent along pre-existing deep-crustal lineaments in an extensional tectonic regime. The pluton is characterized by the presence of iron-rich hydrous mafic minerals, primary magnetite, fO2 above the Ni–NiO buffer and high initial emplacement temperatures near 1000 °C. Modal and textural analyses reveal two probable compositional zones within the pluton: outer and inner. Major element variations support this zoning and point to a peralkaline to metaluminous outer zone and a metaluminous to slightly peraluminous inner zone. Both zones exhibit major and trace element characteristics of the A-type granites with the outer zone belonging to the A1 subtype and the inner zone to the A2 subtype of Eby. The trace element trends observed from outer zone to the inner zone suggests that crystal fractionation may have been the dominant process in the generation of high levels of the incompatible elements in the case of inner zone samples. The high initial 87Sr/86Sr ratio (0.7135) and high Y/Nb ratios (Y/Nb > 1.2) are in the range expected for rocks derived from crustal protoliths. A petrogenetic model involving partial melting of a charnockitic, mafic to intermediate lower crust followed by limited fractional crystallization of the magma in a high-level magma chamber is proposed. The enrichment of HFSE and REE (except Eu) in the inner zone is considered the ultimate product of crystal–melt and volatile activity during the final stage of crystallization in a highly silicic (SiO2 > 74%) magma chamber.
38
Gheorghiu, Diana Antonia, Stefan Lucian Toma, and Traian Mihordea. "Peculiarities in Partial Melted Zone in Cast Alloys." Advanced Materials Research 814 (September 2013): 180–86. http://dx.doi.org/10.4028/www.scientific.net/amr.814.180.
Full textAbstract:
The present work focuses on the microstructural changes that occur in the partial melted zone in welds made on some cast designated alloys. The aim of the work is to improve the available data related to PMZ morphology, properties and possible mechanism involved in the final metal response. It demonstrates that for binary alloys little changes occur in PMZ; in case of a complex alloy the changes are more consistent affecting both primary and eutectic structure when interstitials are involved. It proves also that the morphology of PMZ depends on the filler metal properties.
39
Yildiz, Meral, Sertaç Argun Kıvanç, Berna Akova-Budak, Ahmet Tuncer Ozmen, and Sadık Gorkem Çevik. "An Important Cause of Blindness in Children: Open Globe Injuries." Journal of Ophthalmology 2016 (2016): 1–5. http://dx.doi.org/10.1155/2016/7173515.
Full textAbstract:
Objective. Our aim was to present and evaluate the predictive factors of visual impairment and blindness according to WHO criteria in pediatric open globe injuries.Methods. The medical records of 94 patients younger than 18 years who underwent primary repair surgery were reviewed retrospectively. The initial and final visual acuity, anterior and posterior segment findings, and zone of injury were noted. The patients were classified as blindness in one eye or visual impairment in one eye.Results. Of 412 patients who presented with open globe injury, 94 (23%) were under 18 years old. Fifty-four (16 females, 38 males) children were included. The mean age of the children was 7.1 ± 4.1 years. According to WHO criteria, 19 of 54 patients (35%) had unilateral blindness and 8 had unilateral visual impairment (15%). There was no significant relationship between final visual acuity and gender and injured eye. In visually impaired and blind patients, presence of preoperative hyphema, retinal detachment, and zone 2 and zone 3 injuries was significantly higher.Conclusion. Presence of hyphema and zone 2 and zone 3 injuries and retinal detachment may end up with visual impairment and/or blindness in children.
40
Al-Qattan, Mohammad M. "Flexor tendon repair in zone III." Journal of Hand Surgery (European Volume) 36, no. 1 (2010): 48–52. http://dx.doi.org/10.1177/1753193410382378.
Full textAbstract:
There is a paucity of the literature on the outcome of zone III flexor tendon injuries. In this paper, we report on the results of zone III flexor tendon repair in 35 consecutive adult patients with clean cut lacerations of both flexor tendons in 42 fingers. There were 25 men and 10 women with an average age of 32 years. Repair of both flexor tendons was performed using ‘figure of eight’ core sutures and a continuous epitendinous suture. Postoperatively, an immediate active range of motion protocol was applied to ensure full active extension of the interphalangeal joints. The results were assessed using the Strickland–Glogovac grading system. There were no ruptures. One patient with two injured fingers developed complex regional pain syndrome and the final outcome was fair in both fingers. In the remaining 34 patients (40 fingers), 33 patients (38 fingers) had an excellent outcome and the remaining patient (two fingers) had a good outcome.
41
Bianco, Caterina. "The Capo Castello Shear Zone (Eastern Elba Island): Deformation at the Contact between Oceanic and Continent Tectonic Units." Geosciences 10, no. 9 (2020): 361. http://dx.doi.org/10.3390/geosciences10090361.
Full textAbstract:
Low-grade mylonitic shear zones are commonly characterized by strain partitioning, with alternating low strain protomylonite and high strain mylonite and ultramylonite, where the shearing is most significant. In this paper the capo Castello shear zone is analyzed. It has developed along the contact between continental quartzo-feldspathic, in the footwall, and oceanic ophiolitic units, in the hangingwall. The shear zone shows, mostly within the serpentinites, a heterogeneous strain localization, characterized by an alternation of mylonites and ultramylonites, without a continuous strain gradient moving from the protolith (i.e., the undeformed host rock) to the main tectonic contact between the two units. The significance of this mylonitic shear zone is examined in terms of the dominant deformation mechanisms, and its regional tectonic frame. The combination of the ultramafic protolith metamorphic processes and infiltration of derived fluids caused strain softening by syntectonic metamorphic reactions and dissolution–precipitation processes, leading to the final formation of low strength mineral phases. It is concluded that the strain localization, is mainly controlled by the rock-fluid interactions within the ophiolitic level of the Capo Castello shear zone. Regarding the regional setting, this shear zone can be considered as an analogue of the initial stage of the post-collisional extensional fault, of which mature stage is visible along the Zuccale fault zone, a regional structure affecting eastern Elba Island.
42
Aouad, Andrew, Randall Taylor, and Neil Millar. "Seismic on the edge – a 3D transition zone seismic survey from concept to final volume." ASEG Extended Abstracts 2012, no. 1 (2012): 1–5. http://dx.doi.org/10.1071/aseg2012ab377.
Full text
43
Hernandez-Solis, Augusto, Klemen Ambrožič, Dušan Čalič, et al. "BOUNDARY CONDITION MODELING EFFECT ON THE SPENT FUEL CHARACTERIZATION AND FINAL DECAY HEAT PREDICTION FROM A PWR ASSEMBLY." EPJ Web of Conferences 247 (2021): 12008. http://dx.doi.org/10.1051/epjconf/202124712008.
Full textAbstract:
In this paper, two main exercises have been carried out to describe the effect that varying an albedo boundary condition has in the computation of observables such as decay heat, neutron emission rate and nuclide inventory from a PWR fuel assembly (or a configuration of assemblies) during a depletion scenario. The SERPENT2 code was then employed to emphasize the importance of modeling a proper boundary condition for such purposes. Moreover, the effect of taking into account more than a single fuel-pin region for depletion studies while varying the type of boundary condition, was also accounted for. The first exercise has the main objective of comparing in a single fuel assembly the albedo variations ranging from 1.1 up to full vacuum conditions. By comparing to the reference assembly (considered to be the case of full reflective conditions), relative differences up to +17% were observed in decay heat and up to almost -30% in neutron emissions. Also, a clear dependence on the albedo was detected if more than one depletable zone was considered while computing the integral value of observables of interest. Regarding the second exercise, where a 3 × 3 configuration of fuel assemblies is being now considered with a reflector section in the middle, a negligible effect on the observables was observed for the single fuel pin zone case; instead, an effect in the 244Cm computation when analyzing two fuel pin-zones produced a change in the neutron emission rate during cooling time up to 2.5% (while comparing it to the reference single assembly case).
44
Yamamoto, Nobuyuki, Kiyotsugu Shinagawa, Taku Hatta, and Eiji Itoi. "Peripheral-Track and Central-Track Hill-Sachs Lesions: A New Concept of Assessing an On-Track Lesion." American Journal of Sports Medicine 48, no. 1 (2019): 33–38. http://dx.doi.org/10.1177/0363546519886319.
Full textAbstract:
Background: It has been demonstrated biomechanically that 25% is a critical size defect of the glenoid. However, a recent clinical study reported that a bone loss between 13.5% and 20% (subcritical bone loss) led to impairment of quality of life but not a recurrence of instability. Purpose: To clarify whether a subcritical bone loss exists in assessing a Hill-Sachs lesion via a disease-specific quality of life questionnaire. Study Design: Cohort study; Level of evidence, 3. Methods: Fifty patients (mean age, 27 years) with <25% glenoid defect who were treated with arthroscopic Bankart repair for recurrent anterior dislocation were assessed at a mean follow-up of 28 months. All had an on-track Hill-Sachs lesion. The Western Ontario Shoulder Instability Index (WOSI) and Rowe scores were used for the clinical evaluation. The Hill-Sachs interval was measured on 3-dimensional computed tomography images and divided by the glenoid track width, defined as the Hill-Sachs occupancy (in percentages). The glenoid track was divided into 4 zones based on the percentage of the Hill-Sachs occupancy: zone 1, <25%; zone 2, 25% to <50%; zone 3, 50% to <75%; and zone 4, ≥75%. Results: The recurrence rate was 6% (3 of 50 shoulders). The Rowe score significantly improved from 45.2 ± 4.7 (mean ± SD) preoperatively to 92.3 ± 6.5 at the final follow-up ( P < .05). The WOSI score also significantly increased from 46.6% ± 19.3% preoperatively to 72.3% ± 21.0% at the final follow-up ( P < .001). The WOSI score of patients in zone 4 (peripheral-track lesion) (n = 10) was significantly lower than those in the other zones (central-track lesion) ( P = .0379). Of the 10 patients with the peripheral-track lesion, 5 had a <40% WOSI score, similar to the preoperative WOSI score (46.6%). Conclusion: Patients with on-track lesions can be divided into 2 subgroups: those with the Hill-Sachs occupancy ≥75% (peripheral-track lesion) showed significantly worse WOSI score without recurrent instability events than those with the Hill-Sacks occupancy <75% (central-track lesion).
45
Ismaiylov, G. Kh, and N. V. Muraschenkova. "MODELING OF A WATER-SALT BALANCE OF A RIVER POOL WITH DEVELOPED IRRIGATED AGRICULTURE." Ecology. Economy. Informatics.System analysis and mathematical modeling of ecological and economic systems 1, no. 5 (2020): 65–70. http://dx.doi.org/10.23885/2500-395x-2020-1-5-65-70.
Full textAbstract:
The construction of a mathematical model of the water-salt balance for river basins with the predominant development of irrigated agriculture is considered. The structures of the water and salt balance of the irrigated territory and the balance of the main river bed within it are given. It has been established that if the inflow and outflow of water and salts dissolved in it are caused by its horizontal flows, then the evaporation and accumulation of water (salts) in the aeration zone and groundwater are caused by its vertical flows.This leads to the need to consider instead of the general equation of the water (salt) balance of the irrigated territory of its modifications for the distinguished three vertical zones, that is, “the surface of the territory – aeration zone – groundwater zone”. During the operation of the algorithm, the following are successively determined: elements of the water and salt balance of the irrigated territory and the riverbed; groundwater level as a result of the intake of salts with in-person flow of local tributaries; filtration losses from the channels and the lateral residue of the inflow; moisture content in the aeration zone after irrigation water and precipitation enters it; groundwater level after water from the aeration zone; moisture content in the aeration zone after the influx of groundwater into it; the outflow of groundwater into the riverbed and the final mineralization of water in the aeration zone.
46
Stauffer, Mel R., Don J. Gendzwill, and E. Karl Sauer. "Ice-thrust features and the Maymont landslide in the North Saskatchewan River valley." Canadian Journal of Earth Sciences 27, no. 2 (1990): 229–42. http://dx.doi.org/10.1139/e90-023.
Full textAbstract:
The Battleford glacier created shearing and softening of bedrock clays, contributing to widespread slope instability along the valley of the North Saskatchewan River. The Battleford glacier flowed southeastward down the valley of the North Saskatchewan River during its final stage in west-central Saskatchewan. It created flutings, crevasse fillings, folding and faulting in ice-thrust ridges, and extensive horizontal gouge zones filled with soft, malleable clay. Extensive drilling and testing for the foundations of the Maymont bridge provided definitive data outlining at least three gouge zones. The shallowest gouge zone at an elevation of 465 m defines the base of the most severe glacial folding and deformation of the bedrock in at least one of the ice-thrust ridges. The deeper gouge zones are at about 433 and 438 m elevation. Postglacial landslides (slumps) along the southern side of the North Saskatchewan River are controlled by the gouge zones, which are low-friction slide surfaces along which large horizontal movements took place. Multiple normal faults and graben structures in the landslide mass could have been the mechanism for horizontal movement and extension with little or no rotation. Two main slide masses have been identified: the lower one moved on the middle gouge zone (438 m), and the upper one moved on the upper gouge zone (465 m).
47
Sehgal, Manoti, Lovleen Puri, Sapna Yadav, et al. "Immediate Dental Implants Enriched with L-PRF in the Esthetic Zone." Case Reports in Dentistry 2018 (December 3, 2018): 1–6. http://dx.doi.org/10.1155/2018/9867402.
Full textAbstract:
The aim of this article is to present the clinical application of immediate implant placement with L-PRF and immediate prosthetic loading in anterior esthetic region. A 24-year-old healthy female patient reported with a chief complaint of poor esthetics in the upper front tooth region with retained deciduous teeth. On oral examination, there were retained deciduous teeth (52, 53, and 63) with congenitally missing permanent successors. The retained deciduous teeth were extracted, and immediate implant placement was done in the extraction sockets along with L-PRF membranes in one surgical session under local anesthesia. Immediate temporization was performed with composite crowns on immediately placed dental implants. After 3 months of the healing period, the final implant-level impressions were made and the temporary composite crowns were replaced with the final zirconia porcelain crowns. A 12-month follow-up was made, and satisfactory esthetic and functional results were obtained.
48
Scalia, Joseph, and Craig H. Benson. "Preferential flow in geosynthetic clay liners exhumed from final covers with composite barriers." Canadian Geotechnical Journal 47, no. 10 (2010): 1101–11. http://dx.doi.org/10.1139/t10-018.
Full textAbstract:
Geosynthetic clay liners (GCLs) were exhumed from final covers with composite barriers (geomembrane over GCL) at two municipal solid waste landfills in the USA. Preferential flow and high hydraulic conductivity (>2 × 10−9 m/s) was observed in eight of the 18 GCL samples collected from both sites. At one site, manganese oxide precipitate was concomitant with bundles of needle-punched fibers that conducted preferential flow. Nearly complete replacement of Na by Ca on the bentonite surface occurred in all GCL samples. GCLs with and without preferential flow could not be differentiated by physical and chemical properties commonly used to differentiate GCLs with high and low hydraulic conductivities (exhumed water content, swell index, mole fraction monovalent cations, soluble cation concentrations). The relative abundance of soluble cations in the pore water of GCLs exhibiting preferential flow was comparable to the relative abundance in the subgrade pore water, whereas the pore water in GCLs with distributed flow was more sodic than the pore water in the subgrade. Hydration experiments indicated that bentonite in GCLs initially hydrates in a zone surrounding bundles of needle-punching fibers. Cation exchange during this hydration process may create zones of higher hydraulic conductivity surrounding the fiber bundle, permitting preferential flow.
49
Lippens, Ronnie. "In the Zone of Pure Potential." Cultural Politics 14, no. 3 (2018): 327–43. http://dx.doi.org/10.1215/17432197-7093338.
Full textAbstract:
In 1970 the Dutch philosopher and psychiatrist Jan Hendrik van den Berg announced the end of classical psychoanalysis. In an age without taboos, the mere idea no longer made sense to van den Berg. In the same year Mark Rothko’s stark Chapel in Houston, Texas, was completed at the point in the painter’s life when he had exhausted his experimental attempts to visualize sovereign, superhuman life. Both events are not completely unrelated. Both mark the point in Western culture when radical sovereign aspiration gained its final momentum. The year 2016 marks the point when this Luciferian aspiration achieved hegemonic dominance to occupy the core of cultural life. We are now in a position to look back on Rothko’s Chapel and ask ourselves if, in this newly dawned Age of Light, there still is, as the painter seems to have suggested, a dark side, a zone of inner, hidden depth, and if, contrary to van den Berg’s prediction, it still makes sense to psychoanalyze the Luciferian moment. This article reflects on these questions.
50
Khurana, Ankit. "Pervading Cold Testing of Engines in the Automobile Zone." Applied Mechanics and Materials 110-116 (October 2011): 4544–48. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.4544.
Full textAbstract:
Although the quality of a completed engine ready for shipping is traditionally assured by adopting the firing run at the final process of the engine assembly line, we have still not readily accepted the testing of engines in cold state i.e. without actual combustion & continue to neglect all its long term benefits in view of the immediate shortcomings which not only enhances the inspection speed, fault detection but also poses zilch threat to the environment around us. It increases the effectiveness of the “In-Process Quality Control” of an Engine production line.