Use of Unmanned Aerial Vehicles in Crop Protection

Mishra, Piyush; Vikas, KT; Madhu, K. S.; S., Babu K.; Kendappa, G.; Sudhakar, S.

doi:10.18178/joaat.5.4.340-345

Cited by 27 publications

(58 citation statements)

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“…Recent findings also recognize its significance in tumor pathogenesis and the promotion of tumor progression,[3b] which are of great importance to the investigation of cancer therapy sensitivity and drug resistance . However, bare silicon photonics cannot measure the variation of the pH in a solution given by the relatively low Q resonance . We show that 2D H x MoO 3 is sensitive to the change of ambient H + ion concentration across the conventional pH test range (1–13) and as a result, the H + dopant–driven plasmonics alter the optical absorption due to the excitation of hybrid plasmonic‐optical modes in the MRR varying accordingly.…”

Section: Introductionmentioning

confidence: 85%

An Ultrasensitive Silicon Photonic Ion Sensor Enabled by 2D Plasmonic Molybdenum Oxide

Ren

Zhang

Yao

et al. 2019

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Silicon photonics has demonstrated great potential in ultrasensitive biochemical sensing. However, it is challenging for such sensors to detect small ions which are also of great importance in many biochemical processes. A silicon photonic ion sensor enabled by an ionic dopant–driven plasmonic material is introduced here. The sensor consists of a microring resonator (MRR) coupled with a 2D restacked layer of near‐infrared plasmonic molybdenum oxide. When the 2D plasmonic layer interacts with ions from the environment, a strong change in the refractive index results in a shift in the MRR resonance wavelength and simultaneously the alteration of plasmonic absorption leads to the modulation of MRR transmission power, hence generating dual sensing outputs which is unique to other optical ion sensors. Proof‐of‐concept via a pH sensing model is demonstrated, showing up to 7 orders improvement in sensitivity per unit area across the range from 1 to 13 compared to those of other optical pH sensors. This platform offers the unique potential for ultrasensitive and robust measurement of changes in ionic environment, generating new modalities for on‐chip chemical sensors in the micro/nanoscale.

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Section: Introductionmentioning

confidence: 85%

An Ultrasensitive Silicon Photonic Ion Sensor Enabled by 2D Plasmonic Molybdenum Oxide

Ren

Zhang

Yao

et al. 2019

Small

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“…The first weight loss occurred at a maximum temperature of 62 °C with the weight loss around 24%, which was attributed to the removal of water content in GC . The second decomposition stage observed at a temperature range from 174 to 402 °C, with a weight loss around 40%, resulted from decomposition of GC …”

Section: Resultsmentioning

confidence: 99%

“…This scenario resulted from the thermal decomposition of low‐molecular‐weight followed by high‐molecular‐weight polymer . The final decomposition stage occurring at 328 °C with 11% weight loss could be due to the dissociation of polysaccharide ring and glycosidic bonds . The conjugation of DA and glycol group to chitosan backbone increased the thermal stability of the chitosan derivative.…”

Section: Resultsmentioning

confidence: 99%

N‐deoxycholic acid‐O‐glycol chitosan as a potential carrier agent for botanical pesticide rotenone

Yusoff

Kamari

2018

J of Applied Polymer Sci

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The potential of amphiphilic chitosan derivative, namely, N-deoxycholic acid-O-glycol chitosan (DAGC), as a carrier agent for pesticide rotenone was assessed for the first time. The physicochemical properties of DAGC were characterized using several analytical instruments such as 1 H-NMR spectrometer, CHN-O elemental analyzer, FTIR spectrometer, TGA, DSC, and UV-visible spectrophotometer. DAGC formed self-aggregation in the solution with a spherical shape of 67.5-83.3 nm. Rotenone-loaded DAGC could give an encapsulation efficiency of up to 91.69%. DAGC micelles exhibit good control release properties as it can prolong the release of rotenone up to 41 h more than free rotenone. The Korsmeyer-Peppas constant (n) values suggest that rotenone release from DAGC micelles was governed by diffusion and relaxation of DAGC chains. The results from this study conclude that DAGC is viable to be applied as a carrier agent in pesticide formulation.

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“…It has been identified that SMAs are highly effective energy absorbers and do not transfer energy from the fundamental to higher vibration modes, thus reducing the response of a structure significantly . SMA‐supplemented conventional isolators show enhanced isolation efficiency and have been applied as isolators in highway bridge decks, in buildings, and as recentering devices for civil buildings . Further, SMA springs consisting of pseudo‐elastic SMA wires and helical SMA springs (in isolation system) have been used for the passive seismic vibration control of civil structures.…”

Section: Introductionmentioning

confidence: 99%

“…Also, SMAs have been combined with rubber bearings for reducing the displacement of isolator bearings and have been supplemented with sliding isolators for developing super‐elastic friction base isolators. Finally, SMAs have demonstrated superior control efficiency in protecting highway bridges and buildings from near‐fault earthquakes . Several studies by Torra and coresearchers demonstrate the application of SMA dampers (such as NiTi and CuAlBe) for vibration control in civil engineering structures and stayed cables in bridges .…”

Section: Introductionmentioning

confidence: 99%

Thermally modulated shape memory alloy friction pendulum (tmSMA-FP) for substantial near-fault earthquake structure protection

Gur

Frantziskonis

Mishra

2017

Struct Control Health Monit

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Summary Vibration control of structures under near‐fault earthquakes by employing a friction pendulum supplemented with thermally modulated shape memory alloy (SMA) springs as damper system is studied. Temperature modulation of the SMA spring during the earthquake effectively alters its hysteretic energy dissipation capacity and thereby the control efficiency of the isolation system. The response of a structure with the isolation system is evaluated through nonlinear dynamic time‐history analysis under a set of recorded near‐fault ground motions. Through temperature modulation that effectively yields a large SMA hysteretic energy dissipation, the hybrid friction pendulum system with SMA temperature modulation shows enormous control efficiency. A parametric study reveals that under a wide range of conditions, the thermally modulated SMA friction pendulum isolation system shows improved control efficiency over conventional friction pendulum and SMA friction pendulum isolation systems. Further, the temperature‐tuned SMA hysteresis loops substantially suppress the high frequency components of earthquake motions, thus reducing the possibility of damage to the structure.

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Use of Unmanned Aerial Vehicles in Crop Protection

Cited by 27 publications

References 0 publications

An Ultrasensitive Silicon Photonic Ion Sensor Enabled by 2D Plasmonic Molybdenum Oxide

An Ultrasensitive Silicon Photonic Ion Sensor Enabled by 2D Plasmonic Molybdenum Oxide

N‐deoxycholic acid‐O‐glycol chitosan as a potential carrier agent for botanical pesticide rotenone

Thermally modulated shape memory alloy friction pendulum (tmSMA-FP) for substantial near-fault earthquake structure protection

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