scholarly journals World Alzheimer’s Day: The Need to Spread Awareness

2021 ◽  
Vol 5 (5) ◽  
pp. SC1-SC2
Author(s):  
Harpreet Grewal
Keyword(s):  
Head Unit

Short Commentray on the Occasion of World Alzheimer’s Day by Dr. Harpreet Grewal, Professor & Head (Unit-II), Department of Dentistry, UCMS & GTB Hospital, Delhi-110095  

The Study on the Surface Abrasion about Wafer Final Polishing

2009 ◽  
Vol 626-627 ◽  
pp. 147-152
Author(s):  
Jong Koo Won ◽  
Jung Taik Lee ◽  
Eun Sang Lee
Keyword(s):  
Study Design ◽  
Temperature Sensor ◽  
Processing Time ◽  
Processing Condition ◽  
Major Influence ◽  
Wafer Surface ◽  
Head Unit ◽  
Wafer Polishing ◽  
Machining Speed ◽  
Si Wafer

Polishing is one of the important methods in manufacturing of Si wafers and in thinning of completed device wafer. This study will report the evaluation on abrasion of wafer according to processing time; machining speed and pressure which have major influence on the abrasion of Si wafer polishing, for this, this study design the head unit and analysis head unit. After that, apply to experiment. It is possible to evaluation of wafer abrasion by load cell and infrared temperature sensor. The evaluation of abrasion according to processing condition is selected to use result data that measure a pressure, machining speed, and the processing time. This result is appeared by abrasion in machining condition. Through that, the study cans evaluation a wafer abrasion in machining. It is important to obtain mirror-like wafer surface.

Modeling and controlling flow-induced suspension-head unit vibrations in hard disk drives

2002 ◽  
Vol 8 (6) ◽  
pp. 375-382 ◽  
Author(s):  
J. A. C. Humphrey ◽  
H. Haj-Hariri ◽  
T. Iwasaki ◽  
M. Kazemi ◽  
L. Rosales
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Head Unit

Tip Growing Actuator with the Hose-Like Structure Aiming for Inspection on Narrow Terrain

2011 ◽  
Vol 5 (4) ◽  
pp. 516-522 ◽  
Author(s):  
Hideyuki Tsukagoshi ◽  
◽  
Nobuyuki Arai ◽  
Ichiro Kiryu ◽  
Ato Kitagawa
Keyword(s):  
Plant Growth ◽  
Growth Process ◽  
Maximum Speed ◽  
Flexible Hose ◽  
Head Unit ◽  
Flat Tubes ◽  
Outer Environment ◽  
The Way

This paper proposes a flexible hose-like fluid actuator to inspect narrow curved or bumpy terrain. The tip alone moves forward and the rest remains stationary, enabling the actuator to move smoothly without interfering with the outer environment – a concept based on the plant growth process. The actuator consists of multiple flexible flat tubes bent in the skin, whose bending point is involved in preventing fluid from passing through. The actuator can also steer the direction in which the tip lengthens, while the shape of the rest remains unchanged. Our Grow-hose-I prototype is 62 mm in diameter and grows at a maximum speed of 500 mm/s while producing a 45 N drive. The way of carrying a head unit equipped with a camera is discussed and feasibility of the actuator’s inspection on narrow terrain is demonstrated.

Anion Recognition by a Macrobicycle Based on a Tetraoxadiaza Macrocycle and an Isophthalamide Head Unit

2009 ◽  
Vol 74 (13) ◽  
pp. 4819-4827 ◽  
Author(s):  
Nicolas Bernier ◽  
Sílvia Carvalho ◽  
Feng Li ◽  
Rita Delgado ◽  
Vítor Félix
Keyword(s):  
Anion Recognition ◽  
Head Unit

Thermal Degradation of Polymers. III. Thermal Degradation of a Compound Which Models the Head-to-Head Linkage in Poly(Methyl Methacrylate)

1987 ◽  
Vol 40 (4) ◽  
pp. 687 ◽  
Author(s):  
KA Holland ◽  
ID Rae
Keyword(s):  
Thermal Degradation ◽  
Methyl Methacrylate ◽  
Model Compound ◽  
Spectroscopic Techniques ◽  
Poly Methyl Methacrylate ◽  
Head Unit

As a model for a poly(methyl methacrylate ) chain which contains a head-to-head unit, the thermal degradation of tetramethyl 2,4,5,7-tetramethyloctane-2,4,5,7-tetracarboxylate has been studied. The meso compound degraded at 210� to give seven products which have been characterized by spectroscopic techniques and synthesized by unambiguous routes. The products resulted from reactions which followed thermal rupture of the central C-C bond of the model compound, thus supporting the proposal that head-to-head units are important in the thermal degradation of poly(methyl methacrylate ).

DEVELOPMENT OF MINIATURE ACOUSTO OPTIC TUNABLE FILTER (AOTF) SPECTROMETER FOR DETECTION OF TOXIC INDUSTRIAL CHEMICALS (TICS)

2007 ◽  
Vol 17 (04) ◽  
pp. 867-876 ◽  
Author(s):  
PETER J. STOPA ◽  
JOLANTA I. SOOS ◽  
RONALD G. ROSEMEIER ◽  
SUDHIR B. TRIVEDI ◽  
SUSAN W. KUTCHER
Keyword(s):  
Red Light ◽  
Nir Spectroscopy ◽  
Tunable Filter ◽  
Industrial Chemicals ◽  
Toxic Industrial Chemicals ◽  
Optical Head ◽  
Battery Power ◽  
Head Unit ◽  
Infra Red ◽  
Detection Capabilities

This paper describes a remotely operable miniature spectrometer for the detection of Toxic Industrial Chemicals (TIC) using Near Infra-Red (NIR) spectroscopy. The spectrometer discussed here is compact, rugged and capable of operating on either as a handheld unit or on robotic platforms. The packaged unit consists of two modules: an optical head unit and an electronics unit. The optical head contains an infra-red light source, an Acousto-Optical Tunable Filter (AOTF) spectrometer, and associated electronics. The other module is contains the associated electronics assembly and cables connecting it with the optical head. This unit has fiber optic and free space detection capabilities and can be operated using 24 V battery power packs. We have developed a method to detect unknown chemical threat using measured signatures of known chemicals and chemometric techniques. At this time the system can detect chemicals in solid and liquid forms. We are currently optimizing the system for detection of chemicals in gaseous/vapor forms.

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