Duration of pulsing

In this paper, we present an in-house flexible and portable lidar system integrating an inexpensive, passively Q-switched laser Nd: YAG and a detection module operating in both analog and photon counting mode. This system is designed to study the atmospheric boundary layer (BL) and cirrus clouds (CC). The passively Q-switched Nd:YAG pulsed laser, operating at a second-harmonic generation (SHG) wavelength of 532 nm, features a pulse energy up to 200 mJ, a repetition rate of 1 Hz to 15 Hz, and a pulse duration of 15 ns.

14p dianmotminh02 03-05-2024 6 1   Download

Ebook "TASER® conducted electrical weapons: Physiology, pathology, and law" are rapidly replacing the club for law-enforcement control of violent subjects within many countries around the globe. A TASER CEW is a hand-held device that delivers a 400-volt pulse with a duration tuned to control the skeletal muscles without affecting the heart at a distance of up to 6.5 meters over tiny wires. If necessary, it begins with an arcing voltage of 50,000 V to penetrate thick clothing; the 50,000 V is never delivered to the body itself.

453p tracanhphuonghoa1007 22-04-2024 4 3   Download

This is the first study that describes calls from anurans of this area. Five acoustics parameters were measured, including call duration, call repetition rate (calls/s), inter–call interval, number of notes or pulses in a call, dominant frequency of call (kHz). An acoustic review of Vietnamese members of the genera showed that the dominant frequency of the calls to be is distinctly different in the species of investigated Microhyla and Rhacophorus species, it could be considered as static properties.

8p tamynhan9 02-12-2020 15 3   Download

This is the first study that describes calls from this genus in Vietnam. Five acoustics parameters were measured, including call duration (s), call repetition rate (calls/s), inter-call interval(s), number of notes or pulses in a call, dominant frequency of call (kHz).

8p tamynhan9 02-12-2020 6 1   Download

The green gram (Vigna radiata L. Wilczek) is one of the important pulse crop because of its adaptation to short growth duration, low water requirement, soil fertility and is favoured for consumption due to its easy digestibility and low production of flatulence (Shil and Bandopadhya, 2007).

7p chauchaungayxua8 03-10-2020 13 2   Download

As pigeonpea is long duration crop, many flushes of weed germinate at the later stages which compete with the crop. It is therefore, essential to use the post emergence herbicides in conjuction with pre emergence herbicides for the effective control of weeds.

3p quenchua6 15-06-2020 8 2   Download

Mungbean (Vigna radiata (L.) Wilczek) is a fast-growing warm-season legume, native to the Indian subcontinent; widely cultivated in Southeast Asia. It is an important pulse crop because of its short growth duration, low water requirement, and as a crop suitable for crop rotation and nutritional security being a rich source of protein. Biotic stress produced by viruses especially yellow mosaic virus (YMV) is the main constraint in its production causing substantial yield losses. The detection and diagnosis of viruses is most important to excogitate a management strategy.

18p angicungduoc5 14-06-2020 15 0   Download

In this paper, we report a numerical study of the supercoin (SC) generation in solid-core photonic crystal fibers infiltrated with water-ethanol mixtures. A photonic crystal fiber is constructed as borosilicate glass NC21, which consists of 7 rings of air holes infiltrated with water-ethanol mixtures. We also considered numerically the influence of concentration of the ethanol solution on the dispersion of the fundamental mode. SC generation was demonstrated for the fiber long 20 cm with a pump pulse of 200 fs, the coupled energy of 0.

11p 12120609 01-06-2020 11 1   Download

The effects of sucrose pulsing, cold storage methods (dry and wet) and cold storage duration (one and two weeks) on the post-storage attributes of cut lilies in Dalat were studied. After harvest, the lilies were treated with sucrose pulsing solutions consisting of three concentrations of sucrose (0, 50, and 100 g/L) in combination with 0.2 mM silver thiosulphate (STS) and water as control for 24h at room temperature, then placed in wet and dry cold storage at 2.5 °C for one and two weeks.

14p vikiba2711 14-05-2020 7 0   Download

The present investigation dealt with the effect of temperature and duration of pulsing with silver thiosulphate (STS) on the peroxidative changes of cut rose petals during vase life period. From the investigation it was proved that flowers pulsed with 0.4mM STS at 10oC for a short period of 8 hours significantly decreased the catalase and peroxidase activities thereby extending the shelf life of cut roses. The enhanced longevity of cut roses was due to suppressing the formation of peroxides and free radicals in the plant tissue.

7p kethamoi4 16-04-2020 14 2   Download

Biology and morphometrics of blue butterfly, Lampides boeticus infesting cowpea, was studied. The eggs were disc-shaped, finely sculptured and pale green in colour. The mean egg period observed was 3.20±0.20 days. There were four larval instars. The later instars were found attended by red ants in the field. The first instar caterpillar was fringed with hairs while second instar had sparse hairs. The third and fourth instar caterpillars were slug like, pea green in colour. The average sizes of the head capsule from first to fourth instars were found to be 0.11, 0.25, 0.63 and 1.

5p kethamoi4 16-04-2020 9 1   Download

This amplifier is used to amplify nanojoule and femtosecond Ti:Sapphire laser pulses to yield a 70 µJ pulse energy at 10 Hz repetition rate, which corresponds to an amplification factor of 10000 times. The amplified laser pulses are expected to be nearly transform-limited with a pulse duration of less than 100 fs. Such an amplifier will expand applications of ultrafast modelocked Ti:Sapphire laser oscillator.

10p capheny 28-02-2020 8 0   Download

Pigeonpea is an essential staple pulse crop in the Indian sub-continent. Being drought tolerant and hardy, it is favourable crop for resource poor farmers. Its long maturity duration is a constraint as it gets affected by many abiotic and biotic stresses during its crop duration. An idea about the flowering and maturity patterns in pigeonpea will be helpful to get better insights for the improvement of these traits in the crop. The present study presents statistical analysis of days to 50% flowering (DFF) and days to 75% maturity (DM) in pigeonpea genotypes. The mean DFF and DM are 121.

3p chauchaungayxua3 07-02-2020 21 0   Download

Pulses are important for the nutritional security point of view of the cereal based vegetarian diet of large scale of country. India is the largest producer, consumer and importer of pulses in the world. It has been projected that 32.0 M. tones of total pulse requirement for the burgeoning population of India, which will grow to 1.69 billion by 2050. To attain upto this level an annual growth rate of 2.2% is required. The demand for pulses continues to grow at 2.8% per annum.

8p quenchua2 15-12-2019 13 0   Download

Influences of the intensity and pulse area of the coupling laser on the EIT formation of probe laser pulse are studied in a wide region from micro- to pico-second of pulse duration. It is found that a nearly solition pulse can be established at the smallest pulse area in the pico-second region and with the largest pulse area in the micro-second region.

8p vihermes2711 01-10-2019 24 1   Download

The results show that the stabe region of the optical tweezer depends on the nonlinear coefficient of refractive index. Moreover, the stable region could be brokendown with a critical value of the nonlinear coefficient of refractive index of the surrounding medium irradiated by Gaussian laser pulse described by given parameters as intensity, duration and radius of beam waist.

7p thuyliebe 12-10-2018 38 0   Download

Effect of the pulse electric current on mechanical properties of an ultra-high strength steel (UHSS) is experimentally investigated. A single pulse of electric current with a short duration of 0.36 sec is applied to the specimen under tensile plastic loading. The experimental result showed that flow stress of the UHSS nearly instantly drops at moment of electric current, following strain hardening until necking of the specimen. Uniform elongation completely depends on the pulsing strain, while ultimate tensile strength slightly changes after electric current.

9p cumeo3000 01-08-2018 29 0   Download

The pulsed diode end-pumped passively Q-switched solid-state Nd:YAG lasers are investigated experimentally. A high power laser diode (pulse repetition rate adjustable from 1 Hz to 10 kHz, pulse duration of 600 s) is used as a pumping laser. The obtained results show that the pulsed diode end-pumped passively Q-switched solid state Nd- doped lasers have the advantages in controlling pulse repetition rate, improving nanosecond solid-state laser pulse power and stability (low jitter) in comparison with the use of CW diode end-pumping.

4p cumeo2425 02-07-2018 19 0   Download

(BQ) In this research, an iso duration current pulse generator has been proposed to achieve good surface finish. An experimental performance evaluation has been conducted with conventional transistor pulse train generator and modified iso current pulse generator by Taguchi L27 orthogonal array design. The machining characteristics have been evaluated for both the pulse generators. It is found the that modified iso duration current pulse generator has produced better surface quality with higher material removal rate than the conventional transistor pulse train generator.

8p xuanphuongdhts 27-03-2017 48 1   Download

(BQ) ilicon infiltrated silicon carbide (SiSiC) is developed. The influences of the major operating EDM parameters (discharge current ie, open gap voltage ui, discharge duration te and pulse interval to) of the iso energetic generator on the machining performances like Material Removal Rate (MRR), Tool Wear Ratio (TWR) and surface roughness (Ra) are examined. Relaxation pulses which have lower energy input are also considered to improve the surface quality.

11p xuanphuongdhts 27-03-2017 45 1   Download