1,721,320 research outputs found
Degenerately doped metal oxide nanocrystals for infrared light harvesting: insight into their plasmonic properties and future perspectives
Full text linkThe tuneability of the localized surface plasmon resonance (LSPR) of degenerately doped metal oxide (MOX) nanocrystals (NCs) over a wide range of the infrared (IR) region by controlling NC size and doping content offers a unique opportunity to develop a future generation of optoelectronic and photonic devices like IR photodetectors and sensors. The central aim of this review article is to highlight the distinctive and remarkable plasmonic properties of degenerately or heavily doped MOX nanocrystals by reviewing the comprehensive literature reported so far. In particular, the literature of each MOX NC, i.e. ZnO, CdO, In2O3, and WO3 doped with different dopants, is discussed separately. In addition to discussion of the most commonly used colloidal synthesis approaches, the ultrafast dynamics of charge carriers in NCs and the extraction of LSPR-assisted hot-carriers are also discussed in detail. Finally, future prospective applications of MOX NCs in IR photodetectors and photovoltaic (PV) self-powered chemical sensors are also presented
FURTHER REFINEMENTS OF THE HEINZ INEQUALITY
Full text linkThe celebrated Heinz inequality asserts that 2|||A^1/2XB^1/2||| leq|||A^νXB^(1−ν)+ A^(1−ν)XB^ν||| leq |||AX + XB||| for X ∈ B(H ), A,B ∈B(H )_+, every unitarily invariant norm ||| · ||| and ν ∈ [0,1]. In this paper, we present several improvement of the Heinz inequality by using the convexity of the function F(ν) = ||||A^νXB^(1−ν)+ A^(1−ν)XB^ν|||, some integration techniques and various refinements of the Hermite?Hadamard inequality.Fil: Kaur, Rupinderjit. Sant Longowal Institute of Engineering and Technology; IndiaFil: Moslehian, Mohammad Sal. Ferdowsi University of Mashhad; IránFil: Singh, Mandeep. Sant Longowal Institute of Engineering and Technology; IndiaFil: Conde, Cristian Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto Argentino de Matemática; Argentina. Universidad Nacional de General Sarmiento; Argentin
Cognitive Enhancement Using Odor as Intervention
No full textME, EIEDBrain is the most sophisticated part of the human body. We concentrate our research on how to enhance the abilities of a healthy brain. The science dealing with this concern is called cognitive science. Cognitive assessment is a formal assessment of an individual’s abilities in a range of areas such as verbal and non-verbal skills, memory and speed of processing. The research assesses the cognitive abilities through videos. The study examined and analyzed the electroencephalographic signals of various individuals acquired while the individual is made to go through distinguished emotions- happy and sad. The subject is made to watch two different videos related to happy emotions and sad emotions. The pilot study involves 10 healthy engineering students on whom tests are carried out. The intervention used in this research is odor of lemon. The subjects were exposed to the odor for one hour daily for 15 days. Cognitive Enhancement, i.e., advancement or betterment of mental abilities, is initiated with assessing cognitive abilities. As a part of pre-recording, the ElectroEncephaloGraphy (EEG) signals are acquired while the person watches the videos. During the intervention part, the subject is exposed to odor and lastly, during post-recording the EEG signals are acquired again while the subject watches videos. Analysis of both pre and post-recording signals is done using MATLAB (EEGLAB, Discrete Wavelet Transform) and comparison of various features of both recordings is done. The comparison is done by calculating asymmetry indices and energies of different bands of physiological EEG signals. It is found that asymmetry indices are improved in case of happy emotions as compared to the sad ones which become even sadder. Hence, making an individual emotionally sensitive
Automatic Feature Extraction in Accelerated Plethysmography
Full text linkMaster of Engineering-EIC-DissertationThe heart works as a pumping machine which circulates blood in whole body and nourishes every cell of the body. The pulse generated by heart is sensed with the help of Photo plethysmography technique. Plethysmography is a test which is used to measure the blood clots in arms and legs and how much air one can store in the lungs. The changes in finger blood flow is given by the pulse wave amplitude derived from Finger plethysmography and is analyzed for its diagnostic abilities. The motive of this study is to analyze the features extracted from the second derivative of the pulse waveform. Further, the parameters are to be found which are directly link to the increase level of pitta. Pitta is one of the Ayurvedic dosha which may be the disease causing agent in the human body. It has been analyzed that the pitta level increases due to sunlight and after having mid-day meals.
In this dissertation work the second derivative of the finger PPG waveform has been studied and some important features have been extracted from it. The data has been recorded with the help of BIOPAC MP System and Acknowledge software. For this study data of 36 subjects has been acquired. Finger PPG’s of three fingers namely index, middle and ring of both left and right hands has acquired after breakfast, before and after lunch. Eight parameters from each finger has extracted using computer algorithm. From a total of 36 subjects best 25 subjects are being taken. For comparison, two groups have been made, named as group 1(after breakfast and before lunch) and group 2(after breakfast and after lunch).
Further analysis is done by applying Fisher discriminant ratio and t-Test on these two groups. Out of these 48 parameters, 13 and 16 such parameters from group 1 and 2 respectively are found that having high Fisher discriminant ratio. After this analysis, the correlation matrices are formed for these 13 and 16 parameters. Parameters having correlation more than ‘0.6’ are further selected, the lower Fisher discriminate ratio parameter is eliminated. These correlation matrices yield 6 and 10 parameters from each group respectively for further investigation. After these 6 and 10 parameters of group 1 and 2 respectively, 4 parameters were found to be common. Those parameters are recommended for further studies on detection of high level of pitta.Electrical and Instrumentation Engineering Department, Thapar University, Patial
Feature Extraction from Finger Pulse Profile for High Pitta Detection
No full textThapar University, PatialaAncient Indian system of medicine popularly known as Ayurveda was heavily dependent
on diagnosis through nadi parikshan i.e. pulse diagnosis. Through nadi parikshan, the
tridosha (vata, pitta and kapha) level of body was studied and checked for imbalances, and
the latter if present, was considered the very root of the ailment or illness in the body. This
analysis required no sophisticated instrument and was totally dependent on the expertise of
the expert. In the modern times we have highly sophisticated instruments but the expertise
available earlier for diagnosis is missing. Pulse Plethysmograph is one modern instrument
which can be used to overcome this lacking expertise and hence to revive this dying art of
nadi parikshan. According to Ayurveda, the level of pitta increases immediately after
lunch. In this thesis it has been proposed that a substantial relation may lie between the
finger pulse features and high pitta level in human body.
In this work the finger PPG waveform has been studied and some prominent features have
been extracted from the pulse wave. The data has been recorded using BIOPAC MP
System and AcqKnowledge software. The features thus extracted from the finger pulse
plethysmogram have been used to find a relation between increased pitta and the peripheral
finger pulse. For this pilot study data was acquired from three subjects and three
parameters were extracted from both right and left hands, before and immediately after
lunch. On calculating and comparing the mean and variance of these parameters, it has
been found that the variance of A2/A1 in middle finger, and TP2/TPT in ring finger,
decreases consistently for all the three subjects, in both left and right hand. This result may
be further validated used as an indication of high pitta level in human body.Department of Electrical and Instrumentation
Engineerin
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Optimizing Agro-Waste in Mulching: An Alternative to Power Generation
No full textDepartment of Electrical and Instrumentation
Engineering
Thapar UniversityAgricultural waste generated by several agricultural activities has many alternative
uses. Unfortunately much of it is burnt in the open fields leading to environmental
pollution. For the management of agro-waste one way adopted is to produce
electricity using this agro-waste as fuel. But Agro-waste power generation faces
majors risks like fuel availability and unstable prices, problems of ash melting,
slagging, clinkerisation at the base of boilers, super heater choking, agglomeration
and drop in boiler temperature due to moisture in the bales. All these problems
results in frequent shut downs of the plants and they do not operate continuously.
Transportation of agro-waste from fields to power generation plants add to gas
emission and labour cost. The other alternative for efficiently utilisation of agrowaste
like paddy straw and rice husk is mulching.
Mulching technically means covering of soil. Mulch provide the conditions that are
favourable for the growth of plant and crop production. It is observed that mulching
saves the irrigation water by increasing moisture retention of soil. This study was
conducted to determine the optimal amount of mulching to save the irrigation water,
because excessive use of crop residue as mulch is also not beneficial from
economical point of view. The amount of optimal mulching is determined to be 8
tonnes per hectare. Further, mulching saves 45% of the commercial cost by way of
reduced irrigation.Electronic Instrumentation and Contro
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