Importance of Tool Configuration in Incremental Sheet Metal Forming of Difficult to Form Materials Using Electro-Plasticity

Titanium alloys possess low formability and high flows stresses and are difficult to form without using thermal aid to reduce the flow stress. It has been observed that high density electric pulse aide plastic deformation through electron-dislocation interaction and this phenomenon is termed as electro-plasticity where the reduction in flow stress is not due to resistive heating. Present work makes use of high density DC pulses to deform a Ti alloy using incremental sheet metal forming (ISMF) to emphasize the importance of tool configuration to minimize the resistive heating. Results indicate that the tool configuration plays a significant role to reduce the effect of resistive heating and to enhance effectiveness of electro-plastic effect

Importance of Tool Configuration in Incremental Sheet Metal Forming of Difficult to Form Materials Using Electro-Plasticity

Titanium alloys possess low formability and high flows stresses and are difficult to form without using thermal aid to reduce the flow stress. It has been observed that high density electric pulse aide plastic deformation through electron-dislocation interaction and this phenomenon is termed as electro-plasticity where the reduction in flow stress is not due to resistive heating. Present work makes use of high density DC pulses to deform a Ti alloy using incremental sheet metal forming (ISMF) to emphasize the importance of tool configuration to minimize the resistive heating. Results indicate that the tool configuration plays a significant role to reduce the effect of resistive heating and to enhance effectiveness of electro-plastic effect

Root zone salinity management using fractional skimming wells with pressurized irrigation: Inception report

Wells / Aquifers / Pumping / Groundwater irrigation / Water quality / Salinity control / Irrigation programs / Climate / Waterlogging / Drainage / Soils / Land use / Cropping systems / Farm income

Are disaggregate industrial returns sensitive to economic policy uncertainty

© 2019 Elsevier B.V. This study investigates the impact of economic policy uncertainty on disaggregate US sector based returns. Our work is motivated by the presence of non-linear relationship between US economic policy uncertainty and equity returns of sampled US sectors. The paper uses weekly data from January 1995 to December 2015 for all the return indices and economic policy uncertainty data mainly based on policy issues, provision set for the US federal tax code and disagreement among economic forecasters. Our results indicate that information technology, utilities, industrial and telecommunication sectors remain insensitive to changes in the US economic policy uncertainty. However, financial and the consumer discretionary sectors show significant long run asymmetric relationship with the EPU.Accepted versio

PRIMARY MALIGNANT MELANOMA UTERINE CERVIX

A 40-year-old premenopausal female presented with foul-smelling per vaginal discharge for 3 months. Diagnostic work revealed a locally advanced primary malignant melanoma of uterine cervix. The patient declined pelvic surgery and was treated with Dacarbazine. Malignant melanoma is a rare tumour of skin and has been ranked in the top ve cancers of Australia and Sweden. It is a tumour of melanocytes which forms melanin pigment in the skin. In men, the most common site is trunk while in females common site is limbs. However, melanoma can arise from mucosal surfaces where the melanocytes are present. Most common mucosal sites are head and neck followed by female genital tract. Key words: Cervix, dacarbazine, malignant melanoma

Transparent encryption with scalable video communication: Lower-latency, CABAC-based schemes

Selective encryption masks all of the content without completely hiding it, as full encryption would do at a cost in encryption delay and increased bandwidth. Many commercial applications of video encryption do not even require selective encryption, because greater utility can be gained from transparent encryption, i.e. allowing prospective viewers to glimpse a reduced quality version of the content as a taster. Our lightweight selective encryption scheme when applied to scalable video coding is well suited to transparent encryption. The paper illustrates the gains in reducing delay and increased distortion arising from a transparent encryption that leaves reduced quality base layer in the clear. Reduced encryption of B-frames is a further step beyond transparent encryption in which the computational overhead reduction is traded against content security and limited distortion. This spectrum of video encryption possibilities is analyzed in this paper, though all of the schemes maintain decoder compatibility and add no bitrate overhead as a result of jointly encoding and encrypting the input video by virtue of carefully selecting the entropy coding parameters that are encrypted. The schemes are suitable both for H.264 and HEVC codecs, though demonstrated in the paper for H.264. Selected Content Adaptive Binary Arithmetic Coding (CABAC) parameters are encrypted by a lightweight Exclusive OR technique, which is chosen for practicality

Solar Resource Assessment in Jammu and Kashmir State

The state of Jammu and Kashmir has diverse agro-climatic zones. The present paper on solar resource assessment in the state of Jammu and Kashmir is based on ten years of average data taken from NREL and SRRA stations. The state is blessed with huge solar potential, both for thermal generation as well as photovoltaic. The same energy can be used for electricity and process heat generation to mitigate growing energy crisis particularly in winter. The data as obtained from NREL and C-WET through SRRA stations revealed that the state is receiving more than 5 kWh/m2/day of average DNI and GHI every month which in itself can be harnessed for solar thermal energy and photovoltaic power. The average DNI and GHI received from last ten years varied from (1 kWh/day/m2) to (8kWh/day/m2) per day

Simulation study of stiffeners on composite plate

The present communication highlights a computational model to analyze the behavior of stiffened plates of such composite materials that is subjected to low velocity impact. The commercial explicit finite element software LS-Dyna has been used. The contact force is calculated in conjunction with the loading and unloading processes. The time history of the impact process such as target plate deflection, due to an impact force acting at the center of the plate, is obtained. Analysis shows the effect of number of stiffener on response of composite plate. In particular the displacement and contact force curve with respect to time were investigated, as the stiffness of the composite plate and contact force variation with time were analyzed without failure of composite structure with single and double stiffener