0.5V 3rd-order Tunable gm-C Filter

This paper proposes a 3rd-order gm-C filter that operates with the extremely low voltage supply of 0.5V. The employed transconductor is capable for operating in an extremely low voltage power supply environment. A benefit offered by the employed transconductor is that the filter’s cut-off frequency can be tuned, through a dc control current, for relatively large ranges. The filter structure was designed using normal threshold transistors of a triple-well 0.13μm CMOS process and is operated under a 0.5V supply voltage; its behavior has been evaluated through simulation results by utilizing the Analog Design Environment of the Cadence software

Manipulation of Giant Faraday Rotation in Graphene Metasurfaces

Faraday rotation is a fundamental magneto-optical phenomenon used in various optical control and magnetic field sensing techniques. Recently, it was shown that a giant Faraday rotation can be achieved in the low-THz regime by a single monoatomic graphene layer. Here, we demonstrate that this exceptional property can be manipulated through adequate nano-patterning, notably achieving giant rotation up to 6THz with features no smaller than 100nm. The effect of the periodic patterning on the Faraday rotation is predicted by a simple physical model, which is then verified and refined through accurate full-wave simulations.Comment: 4 pages, 5 figures, submitted to Applied Physics Letter

Analysis and Detection of Information Types of Open Source Software Issue Discussions

Most modern Issue Tracking Systems (ITSs) for open source software (OSS) projects allow users to add comments to issues. Over time, these comments accumulate into discussion threads embedded with rich information about the software project, which can potentially satisfy the diverse needs of OSS stakeholders. However, discovering and retrieving relevant information from the discussion threads is a challenging task, especially when the discussions are lengthy and the number of issues in ITSs are vast. In this paper, we address this challenge by identifying the information types presented in OSS issue discussions. Through qualitative content analysis of 15 complex issue threads across three projects hosted on GitHub, we uncovered 16 information types and created a labeled corpus containing 4656 sentences. Our investigation of supervised, automated classification techniques indicated that, when prior knowledge about the issue is available, Random Forest can effectively detect most sentence types using conversational features such as the sentence length and its position. When classifying sentences from new issues, Logistic Regression can yield satisfactory performance using textual features for certain information types, while falling short on others. Our work represents a nontrivial first step towards tools and techniques for identifying and obtaining the rich information recorded in the ITSs to support various software engineering activities and to satisfy the diverse needs of OSS stakeholders.Comment: 41st ACM/IEEE International Conference on Software Engineering (ICSE2019

A comparison of soil moisture characteristics predicted by the Arya-Paris model with laboratory-measured data

Soil moisture characteristics predicted by the Arya-Paris model were compared with the laboratory measured data for 181 New Jersey soil horizons. For a number of soil horizons, the predicted and the measured moisture characteristic curves are almost coincident; for a large number of other horizons, despite some disparity, their shapes are strikingly similar. Uncertainties in the model input and laboratory measurement of the moisture characteristic are indicated, and recommendations for additional experimentation and testing are made

Cryptographic Key generation using Sclera and Finger Print: Proposed Method

Need for information security and privacy is increasing in recent times. Cryptography is intended to ensure the secrecy and authenticity of the message. The long cryptographic keys are very difficult to remember also protecting its confidentiality is one of the major issues to be deal with. These problems can be solved by integrating Biometrics with cryptography. Since biometric identifiers are unique to individuals, they are more reliable in verifying and identifying than knowledge based methods. Biometrics based authentication systems are progressively acquiring more attention in the field of research. Conventional techniques depend upon biometric features like face, fingerprint, iris, voice etc. In this paper we propose a method for cryptographic key generation fusing Finger print and Sclera

Anthropometric data analysis and constraints faced by women in operating agricultural machinery

Even though women are capable of carrying out all the works that men can do but there are some certain high physiological cost demanding physical works in the  agricultural field that need to be carried out by men only. It is strange to know that women are facing difficulties in carrying out farm mechanization works. The survey conducted using the structured interview schedule gave an insight into the constraints faced by women agricultural workers. Workers were asked to rank the predetermined constraint which was evaluated using the Garrett’s ranking method. It was evident from the results obtained that lack of awareness about the machines and its controls together with lack of training and extension services prevented the women workers from benefiting from mechanization. Also, financial dependence, gender gap, difficulty in operating machines and exclusion from power and decision making were ranked 2nd, 3rd, 4th and 5th by the workers, respectively. The women workers were also worried about the technical knowhow of the machines as most machines required frequent troubleshooting and maintenance. The comparison made on the anthropometric data showed that out of the twenty six anthropometric parameters involved just ten parameters viz. buttock popliteal height, elbow rest height, wall to acromian , shoulder grip length, thigh clearance sitting, hip breadth sitting, grip diameter, grip span and span akimbo have higher values for female workers than that of the male workers. The exerting force required to operate machinery controls were significantly different. Hence there was urgent need to develop women-friendly designs that will suit women anthropometric measurements which will be incorporated into the machines so as to make Indian women workers or operators comfortable with the use of agricultural machines and tractors

Verification of a localization criterion for several disordered media

We analytically compute a localization criterion in double scattering approximation for a set of dielectric spheres or perfectly conducting disks uniformly distributed in a spatial volume which can be either spherical or layered. For every disordered medium, we numerically investigate a localization criterion, and examine the influence of the system parameters on the wavelength localization domains.Comment: 30 pages, LateX, amstex, revtex styles, 20 figure

Comments on “Socio-geographical factors in vulnerability to dengue in Thai villages: a spatial regression analysis” by Tipayamongkholgul and Lisakulruk

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Evaluation of fungal and bacterial antagonists' seed treatment for controlling damping-off disease in forest nurseries

Biological control potential of six well reported biocontrol agents, Trichomerma viride, T. harzianum, Gliocladium virens, Bacillus sp., B. subtilis and Pseudomonas fluorescens against Rhizoctonia solani, R. bataticola, Fusarium oxysporum, F. moniliformae, F. solani and Phythium aphanidermatum causing damping-off in forest nurseries was studied in vitro and under screen house conditions. In vitro evaluation of biocontrol agents by dual inoculation method revealed that P. fluorescens, Bacillus sp. and T. viride significantly inhibited mycelial growth of the damping-offfungi. In pot experiments, seed treatment of T. viride and P. fluorescens proved superior to other fungal and bacterial biocontrol agents in reducing damping off (pre and post emergence) incidence compared to untreated controls