Penetration of infrared radiation energy into sweet potato.

Aircraft infrared signature is one of the most important properties for the military aircraft survivability. In terms of military aircraft, the exhaust system is the most significant infrared radiation source. The exhaust system accounts for more than 90% of the aircraft infrared radiation, and that the exhaust nozzle contributes the most significant infrared radiation of the whole radiation energy provided by the exhaust system from the rear aspect. Low detectionable feature for military aircraft has attracted more importance to promote aircraft survivability via reducing infrared signature. The alteration of nozzle exit area affects an aircraft engine performance; meanwhile, it severely influences the engine infrared signature radiation from the rear side. The present paper is mainly focused on searching an appropriate group of nozzle exit diameter and throat to exit diameter ratio, which can reduce infrared signature radiation while cutting down the loss of thrust. Hence, objectives involve two aspects: one is minimum infrared signature level, and the other is minimum thrust loss. The multi-objective evolutionary algorithm based on decomposition has been employed to solve this bi-objective optimization problem. The optimization results illustrate that dimension selection range and throat to exit diameter ratio exert more important effect on the thrust loss and infrared signature level. Furthermore, the thrust plays significant role for deciding nozzle exit diameter and throat diameter.

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Calculation of Attenuation of Infrared Radiation Energy By Ship Water Mist

2019 IEEE 8th Joint International Information Technology and Artificial Intelligence Conference (ITAIC) ◽

10.1109/itaic.2019.8785527 ◽

2019 ◽

Author(s):

Xiaomin Liu ◽

Yongjin Liu ◽

Qunnie Peng ◽

Feiran Jie ◽

Delie Ming

Keyword(s):

Infrared Radiation ◽

Radiation Energy ◽

Water Mist

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Study of Flying Projectile’s Properties of Infrared Radiation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.268-270.1648 ◽

2012 ◽

Vol 268-270 ◽

pp. 1648-1653

Author(s):

Yue Ying Lv ◽

Ying An

Keyword(s):

Surface Temperature ◽

Infrared Radiation ◽

Attenuation Factor ◽

Radiation Energy ◽

Light Level ◽

Detection Distance ◽

Low Light ◽

Linear Change ◽

Radiation Properties ◽

Atmospheric Transmittance

In order to solve the problem that the optic-electric detecting target board fails to work at nights or under low light level，it has studied the flying projectile’s properties of infrared radiation and the radiation attenuation properties of the flying projectile in the atmosphere. Through establishing the differential equations, the projectile’s surface temperature is obtained to calculate the flying projectile’s infrared radiation properties , according to atmosphere’s transmitting properties，the calculation method of atmospheric transmittance rate. The infrared radiation properties of three typical projectile are simulated by utilizing MATAB. The simulation result shows that the surface temperature of the flying projectile has a linear change with its velocity; the atmospheric transmittance rate is inversely proportional to the detection distance; Once the atmospheric attenuation factor is different, then the radiation energy received by the detector will be different.

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Effects of far-infrared radiation on the freeze-drying of sweet potato

Journal of Food Engineering ◽

10.1016/j.jfoodeng.2004.05.037 ◽

2005 ◽

Vol 68 (2) ◽

pp. 249-255 ◽

Cited By ~ 62

Author(s):

Yeu-Pyng Lin ◽

Jen-Horng Tsen ◽

V. An-Erl King

Keyword(s):

Sweet Potato ◽

Infrared Radiation ◽

Freeze Drying ◽

Far Infrared ◽

Far Infrared Radiation

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Ultraviolet radiation and melanogenesis

Archive of oncology ◽

10.2298/aoo0404203s ◽

2004 ◽

Vol 12 (4) ◽

pp. 203-205 ◽

Cited By ~ 6

Author(s):

Milenko Stanojevic ◽

Zorica Stanojevic ◽

Dragan Jovanovic ◽

Milena Stojiljkovic

Keyword(s):

Free Radicals ◽

Visible Light ◽

Uv Radiation ◽

Infrared Radiation ◽

Biological Effects ◽

Radiation Energy ◽

Light Radiation ◽

Melanin Synthesis ◽

Protection Mechanisms

Light radiation is a part of the electromagnetic radiation, and it consists of the ultraviolet (UV) radiation, visible light, and infrared radiation. UV radiation energy is absorbed in the form of photons in biomolecules (chromophores) and induces various cellular reactions, out of which photochemical and photosensitizing are the most significant. In contact with the skin UV radiation incites protection mechanisms: the most important are stratum corneum thickening and melanin synthesis (melanogenesis). Basic role of melanin is absorption and scattering of UV rays and neutralization of free radicals. In this review physical characteristics of UV radiation, its biological effects, and relation to melanogenesis and carcinogenesis are discussed.

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Teknik Penggunaan Ajir pada Beberapa Varietas Ubi Jalar (Ipomoea batatas L.) di Dataran Tinggi Papua

JURNAL BUDIDAYA PERTANIAN ◽

10.30598/jbdp.2020.16.1.77 ◽

2020 ◽

Vol 16 (1) ◽

pp. 77-87

Author(s):

Alberth Soplanit ◽

Merlin K Rumbarar ◽

Siska Tirajoh ◽

Nur E Suminarti

Keyword(s):

Solar Radiation ◽

Sweet Potato ◽

Potato Variety ◽

Ipomoea Batatas ◽

High Efficiency ◽

Block Design ◽

Dry Weight ◽

Radiation Energy ◽

Randomized Block Design ◽

Environment Experiment

This study aimed to obtain high efficiency in the use of solar radiation energy by combining varieties and stake angle (against horizontal) in sweet potato cultivation in the Papua highlands. The experiment was conducted on entisol soil type at 1560 m above sea level from April to September 2016. The environment experiment was arranged in a factorial Randomized Block Design with three replications. Factor A (variety) consisted of three varieties, i.e. Siate (local), Papua Sollosa, and Cangkuang; factor B (stake angle) consisted of four angles i.e. without stakes, 45°, 60°, and 90°. Specific Leaf Area decreased following an increase in stake angle levels for all varieties. The experiment reveals that Cangkuang with a 90° stake angle was higher on tuber dry weight (248.7 g per plant). The highest tuber yields were achieved by Cangkuang variety at 90° and 60° stakes angle with production 31.53 ton per ha and 28.86 ton per ha, respectively. Under conditions of abiotic stress due to the high level of cloud shade in the Papua highlands, it is recommended to use Cangkuang sweet potato variety or varieties with wide leaves, combined with the use of stakes at 90° and 60° angles. Keywords: Stake, solar radiation energy, sweet potato variety, Papua highland ABSTRAK Penelitian ini bertujuan untuk mendapatkan efisiensi penggunaan energi radiasi matahari yang tinggi dengan mengkombinasikan varietas dan kemiringan (sudut terhadap horizontal) ajir pada budidaya tanaman ubi jalar di dataran tinggi Papua. Penelitian berlangsung pada tanah entisol, ketinggian 1560 m di atas permukaan laut dari bulan April - September 2016. Rancangan lingkungan adalah faktorial yang disusun dalam Rancangan Acak Kelompok dengan tiga ulangan. Faktor A (varietas) terdiri dari tiga varietas, yakni Siate (lokal), Papua Sollosa dan Cangkuang; faktor B (sudut kemiringan ajir) terdiri dari empat sudut yakni tanpa ajir, kemiringan ajir 45°, 60° dan 90°. Hasil penelitian menunjukkan bahwa luas daun spesifik (LDS) menurun mengikuti peningkatan kemiringan ajir pada semua varietas, dengan bobot kering umbi tertinggi 248,7 g per tanaman dihasilkan oleh varietas Cangkuang pada kemiringan ajir 90°. Hasil umbi tertinggi secara berturut-turut diperoleh oleh varietas Cangkuang pada kemiringan ajir 90° dan 60° masing-masing 31,53 ton per ha dan 28,86 ton per ha. Pada kondisi cekaman abiotik akibat tingkat keawanan tinggi di dataran tinggi Papua, dianjurkan untuk menanam varietas ubi jalar Cangkuang atau varietas dengan karakter berdaun lebar dikombinasikan dengan penggunaan ajir dengan kemiringan 90° dan 60°. Kata kunci: Ajir, energi radiasi matahari, varietas ubi jalar, dataran tinggi Papua

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