Design of Fiber Optic Load Sensor for Low-Load Detection Using Microbending Method

This research aimed to design and investigate the fiber optic load sensor produced from the mixture of 100 mesh grains of sand, silicone rubber, and catalyst. The response of the resulted fiber optic load sensor was measured by detecting the microbending of single-mode fiber optic in the form of the power meter. The test was conducted using a light source as an input signal on the sensor. The laser is stable for each load sensor test, with a wavelength of 1500 nm. The study's results confirmed that the load sensor's response has a connection between the amount of load and the voltage; the greater the pressure or load, the less the output power will decrease and cause signal weakening

Sampling and Mass Detection of a Countable Number of Microparticles Using on-Cantilever Imprinting.

Liquid-borne particles sampling and cantilever-based mass detection are widely applied in many industrial and scientific fields e.g., in the detection of physical, chemical, and biological particles, and disease diagnostics, etc. Microscopic analysis of particles-adsorbed cantilever-samples can provide a good basis for measurement comparison. However, when a particles-laden droplet on a solid surface is vaporized, a cluster-ring deposit is often yielded which makes particles counting difficult or impractical. Nevertheless, in this study, we present an approach, i.e., on-cantilever particles imprinting, which effectively defies such odds to sample and deposit countable single particles on a sensing surface. Initially, we designed and fabricated a triangular microcantilever sensor whose mass m0, total beam-length L, and clamped-end beam-width w are equivalent to that of a rectangular/normal cantilever but with a higher resonant frequency (271 kHz), enhanced sensitivity (0.13 Hz/pg), and quality factor (~3000). To imprint particles on these cantilever sensors, various calibrated stainless steel dispensing tips were utilized to pioneer this study by dipping and retracting each tip from a small particle-laden droplet (resting on a hydrophobic n-type silicon substrate), followed by tip-sensor-contact (at a target point on the sensing area) to detach the solution (from the tip) and adsorb the particles, and ultimately determine the particles mass concentration. Upon imprinting/adsorbing the particles on the sensor, resonant frequency response measurements were made to determine the mass (or number of particles). A minimum detectable mass of ~0.05 pg was demonstrated. To further validate and compare such results, cantilever samples (containing adsorbed particles) were imaged by scanning electron microscopy (SEM) to determine the number of particles through counting (from which, the lowest count of about 11 magnetic polystyrene particles was obtained). The practicality of particle counting was essentially due to monolayer particle arrangement on the sensing surface. Moreover, in this work, the main measurement process influences are also explicitly examined

Design of Miniaturized, Self-Out-Readable Cantilever Resonator for Highly Sensitive Airborne Nanoparticle Detection

In this paper, a self-out-readable, miniaturized cantilever resonator for highly sensitive airborne nanoparticle (NP) detection is presented. The cantilever, which is operated in the fundamental in-plane resonance mode, is used as a microbalance with femtogram resolution. To achieve a maximum measurement signal of the piezo resistive Wheatstone half-bridge, the geometric parameters of the sensor design were optimized by finite element modelling (FEM). Struts at the sides of the cantilever resonator act as piezo resistors and enable an electrical read-out of the phase information of the cantilever movement whereby they do not contribute to the resonators rest mass. For the optimized design, a resonator mass of 0.93 ng, a resonance frequency of ~440 kHz, and thus a theoretical sensitivity of 4.23 fg/Hz can be achieved. A μ-channel guiding a particle-laden air flow towards the cantilever is integrated into the sensor chip. Electrically charged NPs will be collected by an electrostatic field between the cantilever and a counter-electrode at the edges of the μ-channel. Such μ-channels will also be used to accomplish particle separation for sizeselective NP detection. Throughout, the presented airborne NP sensor is expected to demonstrate significant improvements in the field of handheld, MEMS-based NP monitoring devices

Tragedi Megawati. : Revisi politik massa di Indonesia.

Yogyakartax, 276 p.; 21 cm

PENGARUH PRODUK, HARGA, DAN PROMOSI TERHADAP KEPUTUSAN PEMBELIAN PRODUK KIMIA DI PT DELPHIA PRIMA JAYA SURABAYA.

The decision making process effort is expected to begin by the fact that there preaches reconciliation and has ditched the need for it is to be fulfilled .The ulfilment of rudimentary living is related to a number of alternatives and it is requisite to it would be evaluated on an upcoming international seminar aimed at peaceful and steady in order to gain some held back the best from the world largest oil consumers perception .In in the process of this time consumers need information that have large numbers of out for their interests and the extent to which the drop will depend upon the customer s needs as well as the situation he who puts his trust .Pt indofood acquired misp shares decision of such a move would be carried out either by the use of the anglo saxons balancing the positive side with the negative side a product and or seeking for the best solution from the perspective of a consumers that make up the has been evaluated in terms of back .In this research the data collected through a method of of the questionnaire was against all the customers pt delphia prima jaya which holds a significant proportion of respondents there were a total of 75 To test by analyzing the data which has been obtained of the respondents who bermetode quantitative .This research do some test , namely the practical expressed valid because it ( r count ) were greater than on ( r table ) , and also because the value of reliability expressed it is reliable cronbach alpha greater than 0.6 , classical test , and test a correlation coefficient terminated with a value of adjusted r square 75,3 % , which showed that the relationship between products , the price of , promotion of the decision of the purchase of strong , and linear regression test and the worship of idols that has the data that has been produced which is y1 = 0.077 + 0.486 x1 + 0.453 x2 + 0.049 x3 , and the last was the results of the t against several variables that is , testing t test the product ( x1 ) expressed significant of the decision of the purchase of ( y ) because t count 4.256 > t 1.99444 table t test of prices ( x2 ) expressed significant of the decision of the purchase of ( y ) because t count 4.610 > t 1.99444 table , t test promotion ( x3 ) expressed do not affect significantly with the resolution of the purchase of ( y ) because t count 0.049> t table 1.99444 from the results of some test that has been carried out , get that product and price variable have a positive influence and significant with purchase decision , tests carried out using t test show that the independent variable for which researched significant of the decision of the purchase , while variable promotion did not influence of the decision of the purchase

Angan-angan budaya Jawa : Analisis semiotik pengakuan Pariyem

xxxi, 297p.; 22 cm