Engineering

An experimental study of cutting performance on monocrystalline germanium after ion implantation
Monocrystalline materials, such as silicon and germanium, are widely used in the semiconductor industry and optical engineering due to their excellent electrical and optical characteristics. However, it is difficult to achieve an ultraprecise mirrored surface with the turning process due to the hard and brittle nature of those materials. It has been proved that the machinability of silicon and ...


Finite time control for MIMO nonlinear system based on higher-order sliding mode
Considering a class of MIMO uncertain nonlinear system, a novel finite time stable control algorithm is proposed based on higher-order sliding mode concept. The higher-order sliding mode control problem of MIMO nonlinear system is firstly transformed into finite time stability problem of multivariable system. Then continuous control law, which can guarantee finite time stabilization of nominal ...
ICAN: A novel laser architecture for space debris removal
The development of a fiber based laser architecture will enable novel applications in environments which have hitherto been impossible due to size, efficiency and power of traditional systems. Such a new architecture has been developed by the International Coherent Amplification Network (ICAN) project. Here we present an analysis of utilizing an ICAN laser for the purpose of tracking and de-orb...


Towards a cooperation between the arts, space science research and the European Space Agency – Preliminary findings of the ESA Topical Team Arts and Sciences (ETTAS)
The arts offer alternative insights into reality, which are explored by science in general, and broadened by the activities conducted by the European Space Agency and other space agencies. Similar to the way the members of ESA are ambassadors for spaceflight and science, artists and cultural professionals are ambassadors for human expression, experimentation, and exploration. In June 2011, the ...
Measurement and stability of the pointing of the BepiColombo Laser Altimeter under thermal load
The BepiColombo Laser Altimeter (BELA) has been selected to fly on ESA׳s BepiColombo mission to Mercury. The instrument will be the first European laser altimeter designed for interplanetary flight. This paper describes the setup used to characterize the angular movements of BELA under the simulated environmental conditions that the instrument will encounter when orbiting Mercury. The system c...


Sensitivity Study of Pseudodynamic Algorithm with Structure-Dependent Quadrature Equations
An estimated initial stiffness matrix is generally needed to determine the coefficient matrices of quadrature equations for a structure-dependent pseudodynamic algorithm. It is shown herein that an experimentally determined initial stiffness matrix is, in general, close to the true initial stiffness matrix if an imposed displacement is small enough. This case is often encountered in practice. T...
On estimation of two-component mixture inverse Lomax model via Bayesian approach
A mixture distribution is the probability distribution of observations in the pooled population which is used to make statistical inferences about the characteristics of the sub-populations on the basis of sample data from the joint population. This article comprises such sort of study for unknown parameters of two-component mixture inverse Lomax distribution based on Bayesian thoughts. Bayes e...

Multimode Preemptive Resource Investment Problem Subject to Due Dates for Activities: Formulation and Solution Procedure
The preemptive Multimode resource investment problem is investigated. The is to minimize the total renewable/nonrenewable resource costs and earliness-tardiness costs by a given project deadline and due dates for activities. In this problem setting preemption is allowed with no setup cost or time. The project contains activities interrelated by finish-start type precedence relations with a time...
The impact of work time control on physicians' sleep and well-being
Physicians' work schedules are an important determinant of their own wellbeing and that of their patients. This study considers whether allowing physicians control over their work hours ameliorates the effects of demanding work schedules. A questionnaire was completed by hospital physicians regarding their work hours (exposure to long shifts, short inter-shift intervals, weekend duties, night d...

Intelligent Stethoscope
Heart valve disorders are primarily detected by auscultation, technique of listening to heart sounds. A more modern form of this technique is phonocardiography, concerned with the automated acoustic recording and processing of heart sounds. This paper presents a method that aims at development of an algorithm to detect common heart valve disorders by processing heart sounds and provision of eas...
Design of Nasal Ultrasound: A Pilot Study
An A-scan ultrasound gives us one dimensional information about the area of interest in the body being examined. Paranasal sinuses are empty air-filled cavities whose functions are to support the weight of the skull, introduce resonance to voice and condition the respired air. They are located in the nasal cavity -maxillary sinuses, above the eyes-frontal sinuses, between the eyes -ethmoidal si...

Infant Cry Detection and Pain Scale Assessment: A Pilot Study
A biological alarm system that connects mother and new born is referred as infant cry. Infant cry is a first means of communication through which mother understands the level of distress/ needs. Infant cry can be considered a multimodal behavior which involves limb movements, facial expressions which changes over time to identify the needs of an infant. The cry of the baby cannot be predicted a...
Clinical Engineering in India: A Case Study
Clinical Engineering (CE), an interdisciplinary field derived from classical engineering emphasize on the importance of two important domains, medical and engineering. The field comprises of major themes that include medical terminology, clinical measurement and instruments, human factor engineering, medical ethics. As a clinical engineer, he/she makes sure on safety aspects in the hospital, en...
A Measure to Detect Sleep Onset Using Statistical Analysis of Spike Rhythmicity
Electroencephalogram (EEG) signals derived from polysomnography recordings play an important role in assessing the physiological and behavioral changes during onset of sleep. This paper suggests a spike rhythmicity based feature for discriminating the wake and sleep state. The polysomnography recordings are segmented into 1 second EEG patterns to ensure stationarity of the signal and four windo...
Design and Development of Post Knee Arthroscopy Assist Device
Designing and developing a device which provides a solution for knee spasms for the people who underwent surgery in the knee due to injury by enhancing the ability of motion in the knee joint and also strengthening the weak muscles. After operative procedures the patient remains in bed rest which results in passiveness in the lower limb and Range of Motion (ROM) will be reduced due to the impac...