MEASURING THE PROCESS EFFICIENCY OF CONTROLLED WELDING PROCESSES

This The process efficiency in Seem and Arc Welding is a crucial input to Mathematical models of the process and requires the use of an accurate welding calorimeter. In this paper we compare a liquid nitrogen calorimeter with an insulated box calorimeter for measuring the process efficiency of Fronius CMT, Lincoln STT and Rapid Arc, Kemppi FastRoot and standard pulsed GMAW. All the controlled dip transfer processes had a process efficiency of around 85% when measured with the liquid nitrogen calorimeter

Protein Array Patterning by Diffusive Gel Stamping

10.1371/journal.pone.0046382PLoS ONE710

Studi Pengendalian Banjir Di Kelurahan Penanggungan Dengan Saluran Banjir (Floodway)

Kelurahan Penanggungan merupakan kelurahan yang terletak di kota Malang. Kelurahan ini terletak pada sebelah utara kelurahan Sumbersari, yang memiliki luas daerah sebesar 782 km2 dan terdiri dari 8 RW dengan total jumlah penduduk 10.699 jiwa. Kelurahan Penanggungan memiliki kontur yang lebih tinggi dibandingkan jalan disekitarnya yaitu jalan Mayjend Panjaitan. Pada kelurahan ini tepatnya pada desa Betek, dilalui oleh saluran drainase yang dulunya merupakan saluran irigasi. Saluran ini memiliki panjang +2,8 km dan memiliki luas aliran sebesar +0,5897 km2 yang melintas dari kelurahan Penanggungan sampai kelurahan Ketawanggede. Saluran ini sering mengalami peluapan saat musim penghujan, diakibatkan kondisi saluran yang berubah fungsi dari irigasi menjadi saluran drainase, tidak mampu menahan debit yang masuk kedalamnya. Selain itu intensitas hujan yang tinggi dan kondisi saluran yang terdapat banyak sampah menjadi penyebab banjir pada desa Betek. Meluapnya air pada saluran ini juga menyebabkan beberapa ruas jalan Mayjend Panjaitan juga tergenang dan mengganggu mobilitas para pengguna jalan. Selain itu desa Betek memiliki pemukiman yang padat, sehingga sulit untuk mengatasi masalah tersebut. Untuk itu perlu adanya alternatif penanggulangan banjir yang tepat guna menyelesaikan permasalahan pada daerah ini. Alternatif penanggulangan banjir yang akan direncanakan adalah normalisasi saluran dan floodway sehingga harapannya dapat mengatasi permasalahan banjir yang ada pada daerah tersebut. Sebagai acuan perencanaan alternatif penanggulangan banjir maka digunakan debit rencana dengan kala ulang 25 tahun sebesar 11,8779 m3/dt. Kemudian dilakukan perencanaan normalisasi dan floodway dengan menggunakan debit berdasarkan pembagian luas daerah tangkapan masing-masing. Untuk kapasitas debit yang dapat dialirkan floodway, yaitu untuk floodway pertama dan floodway kedua sebesar 7,1289 m3/dt dan 2,4878 m3/dt

Uji Stabilitas Sediaan Mikroemulsi Menggunakan Hidrolisat Pati (De 35–40) Sebagai Stabilizer

Various solubilization techniques have been developed to enhance the bioavailability of hydrophobic drugs. One of the solubilization techniques is preparation of microemulsion. Microemulsion is a potential carrier in drug delivery system because it has many advantageous characteristics. In this research, hydrophobic drug was made in a dosage form of oil in water (O/W) microemulsion using ketoprofen as a model and investigated the influence of adding starch hydrolisates with dextrose equivalent (DE) 35-40 in variety concentrations (0,0%; 1,5%; 2,0%; 2,5%) to the stability of this microemulsion system. This microemulsion consisted of isopropyl miritate as oil phase, tween 80 and lechitin as surfactants, ethanol as cosurfactant, propylene glycol as cosolvent, starch hydrolisates DE 35–40 as stabilizer, and water as external phase. The evaluation was stability test both phisically and chemically. The result showed that the stability of microemulsion system increased significantly by adding starch hydrolisates DE 35-40 at 2,5%

A Comparative Study Between Alcoholics of Koraga Community, Alcoholics of General Population and Healthy Controls for Antioxidant Markers and Liver Function Parameters

Objectives: It is well established that long-term alcohol consumption leads to liver cirrhosis and other related disorders. Sufficient work has been done on biochemical markers of liver damage and antioxidant status of chronic alcoholics in general population. In the current study chronic alcoholics from a community called Koraga are analysed for the same parameters in a view to assess the extent of liver damage as compared to healthy controls and other alcoholics. Methods: Serum and urine samples from Koraga alcoholics (n=28), general alcoholics (n=30) and healthy controls (n=31) were analysed for liver function parameters and antioxidant markers. Liver function parameters were determined by automated analyzer. Markers of antioxidant status were estimated spectrophotometrically. The data was analysed using SPSS version 16.0. Results: There was significant increase in serum AST, serum ALT, serum GST and urine GST in both general and Koraga alcoholics when compared to healthy controls (p<0.0001). Serum ALT, serum GST and urine GST activity was significantly higher in general alcoholics when compared to Koraga alcoholics (p<0.001). Serum and urine total thiol levels were significantly lower in general alcoholics when compared to healthy controls and Koraga alcoholics (p<0.0001). We have observed no difference in total thiols level between healthy controls and Koraga alcoholics, in fact, there was significant increase in urine total thiols level in Koraga alcoholics compared to healthy controls (p<0.001). On Pearson’s correlation serum AST, serum ALT correlated positively with serum and urine GST (p<0.0001) and negatively with serum total thiols (p<0.0001). Serum GST correlated negatively with serum total thiols (p<0.0001). Conclusion: Results of our study possibly indicate that the extent of alcohol induced liver damage in Koraga subjects is comparatively lower than general alcoholics, even though the alcohol consumption is found to be higher in them. There may be some mechanism that is rendering them resistant to alcoholic liver damage which needs to be explored through further studies at molecular level

Squeezing enhancement by damping in a driven atom-cavity system

In a driven atom-cavity coupled system in which the two-level atom is driven by a classical field, the cavity mode which should be in a coherent state in the absence of its reservoir, can be squeezed by coupling to its reservoir. The squeezing effect is enhanced as the damping rate of the cavity is increased to some extent.Comment: 3 pages and 3 figure

Unique case of central retinal artery occlusion secondary to COVID-19 disease

© 2020 The Authors SARS-COVID-2 has been noted to be associated with neurological symptoms and complications including stroke. Hypercoagulability associated with COVID-19 has been described as a “sepsis-induced coagulopathy” and may predispose to spectrum of thromboembolic events. We present a unique article of isolated central retinal artery occlusion secondary to SARS-COV 2