A semi-fixed frequency method for evaluating the effective resolution of A/D converters

2002 ◽  
Author(s):  
K. Hejn ◽  
D. Morling
Keyword(s):  
Fixed Frequency ◽  
Frequency Method

scholarly journals Towards an Ultra Sensitive Hybrid Mass Sensor Based on Mode Localization without Resonance Tracking

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5295
Author(s):  
Claude Humbert ◽  
Vincent Walter ◽  
Najib Kacem ◽  
Thérèse Leblois
Keyword(s):  
Limit Of Detection ◽  
Open Loop ◽  
Fine Tuning ◽  
Mass Sensor ◽  
Fixed Frequency ◽  
Frequency Method ◽  
Frequency Tracking ◽  
Mode Localization ◽  
Resonant Structures ◽  
Peak Tracking

We present a mode localized mass sensor prototype based on a hybrid system excited at a fixed frequency slightly below the resonances. Indeed, we show, both theoretically and experimentally, that this condition yields higher sensitivities and similar sensitivity ranges than that of resonance peak tracking while being less time consuming than a classical open-loop configuration due to the absence of frequency sweep. The system is made of a quartz resonator and a hardware that includes a resonator and the coupling. The digital aspect allows maximum sensitivity to be achieved with a fine tuning of the different parameters and the implementation of a coupling, regardless of the physical resonator geometry. This allows the generation of mode localization on shear waves resonant structures such as the quartz cristal microbalance widely used in biosensing. This solution has been successfully implemented using resin micro balls depositions. The sensitivities reach almost their maximum theoretical values which means this fixed frequency method has the potential to reach lower limit of detection than the open loop frequency tracking method.

INVESTIGATION OF THE DUAL-FREQUENCY METHOD FOR REMOTE SENSING OF SOLID AEROSOLS

2010 ◽  
Vol 69 (13) ◽  
pp. 1205-1219
Author(s):  
O. A. Voitovych ◽  
A. M. Linkova ◽  
G. I. Khlopov
Keyword(s):  
Remote Sensing ◽  
Dual Frequency ◽  
Frequency Method

PROMOSI KESEHATAN DALAM PENCEGAHAN HIPERTENSI DAN PERILAKU MEROKOK DI DUSUN COMBONGAN YOGYAKARTA

2019 ◽  
Vol 24 (4) ◽  
pp. 879
Author(s):  
Tri Wahyuni Sukesi
Keyword(s):  
Health Promotion ◽  
Smoking Behavior ◽  
Good Knowledge ◽  
Frequency Method ◽  
Reading Material ◽  
Prevention Of Hypertension ◽  
And Control

AbstrakHipertensi dan rokok merupakan hasil analisis prioritas masalah dengan menggunakan metode USGF (Urgency, Seriousness, Growth, dan Frequency) di dusun Combongan Yogyakarta. Berdasarkan hasil prioritas masalah ini maka diambil suatu upaya pencegahan dan pengendalian dengan melakukan promosi kesehatan pencegahan hipertensi dan perilaku merokok. Kegiatan ini bertujuan untuk meningkatkan pengetahuan warga tentang hipertensi dan bahaya merokok. Harapannya dengan pengetahuan yang baik dapat meningkatkan perilaku yang baik juga dalam pencegahan hipertensi dan perilaku merokok. Metode yang digunakan adalah dengan penyuluhan secara langsung kepada warga dengan menggunakan powerpoint dan juga membagikan leaflet sebagai bahan bacaan. Hasil yang diperoleh adalah kegiatan penyuluhan berjalan dengan baik dan warga peserta penyuluhan aktif bertanya dan mengikuti kegiatan penyuluhan sampai selesai.Penyuluhan dilakukan dengan interaktif antara narasumber dengan warga peserta penyuluhan.Kata kunci: Hipertensi, rokok, penyuluhan.AbstractHypertension and cigarettes are the result of priority analysis of problems using the USGF (Urgency, Seriousness, Growth, and Frequency) method in the Combongan Yogyakarta. Based on the priority results of this problem, an effort to prevent and control is taken by conducting health promotion to prevent hypertension and smoking behavior. This activity aims to increase people's knowledge about hypertension and the dangers of smoking. With good knowledge can improve good behavior also in the prevention of hypertension and smoking behavior. The method used is counseling directly to residents by using powerpoint and also distributing leaflets as reading material. The results obtained were counseling activities went well and the counseling participants actively asked and participated in the extension activities until they were finished. Counseling was carried out interactively between informants and community members.Keywords: Hypertension, cigarettes, counseling.

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