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1. An open-aperture partially-evacuated receiver for more uniform reflected solar flux in circular-trough reflectors: Comparative performance in air heating applications

Author:
Madadi Avargani, Vahid; Norton, Brian; Rahimi, Amir
Source:
Renewable energy 2021 v.176 pp. 11-24
ISSN:
0960-1481
Subject:
mechanical damage,   etc   ; air; fluid mechanics;     Show all 3 Subjects
Abstract:
... Trough reflectors can produce a reflected solar flux density that is highly concentrated in specific regions of the receiver surface causing higher thermal losses as well as increasing the likelihood of mechanical damage to the receiver. Time-dependent three-dimensional computational fluid dynamics models were developed and used to compare optical and thermal performances of unglazed tubular, evac ...
DOI:
10.1016/j.renene.2021.05.072

2. Instant Ultrasound-Evoked Precise Nanobubble Explosion and Deep Photodynamic Therapy for Tumors Guided by Molecular Imaging

Author:
Li, Honghui; Wu, Zhiyou; Zhang, Jinde; Sun, Xiang; Duan, Fei; Yao, Junjie; Sun, Mingyang; Zhang, Jiaqiang; Nie, Liming
Source:
ACS applied materials & interfaces 2021 v.13 no.18 pp. 21097-21107
ISSN:
1944-8252
Subject:
mechanical damage,   etc   ; nanobubbles; neoplasms; permeability; photochemotherapy; ultrasonics;     Show all 6 Subjects
Abstract:
... Nanobubbles (NBs) have recently gained interest in cancer imaging and therapy due to the fact that nanoparticles with the size range of 1–1000 nm can extravasate into permeable tumor types through the enhanced permeability and retention (EPR) effect. However, the therapeutic study of NBs was only limited to drug delivery or cavitation. Herein, we developed ultrasound-evoked massive NB explosion to ...
DOI:
10.1021/acsami.1c05517

3. Discrimination of common defects in loquat fruit cv. ‘Algerie’ using hyperspectral imaging and machine learning techniques

Author:
Munera, Sandra; Gómez-Sanchís, Juan; Aleixos, Nuria; Vila-Francés, Joan; Colelli, Giancarlo; Cubero, Sergio; Soler, Esteban; Blasco, José
Source:
Postharvest biology and technology 2021 v.171 pp. 111356
ISSN:
0925-5214
Subject:
mechanical damage,   etc   ; Eriobotrya japonica; fruits; loquats; Spain;     Show all 5 Subjects
Abstract:
... Loquat (Eriobotrya japonica L.) is an important fruit for the economy of some regions of Spain that is very susceptible to mechanical damage and physiological disorders. These problems depreciate its value and prevent it from being exported. Visible (VIS) and near infrared (NIR) hyperspectral imaging was used to discriminate between external and internal common defects of loquat cv. ‘Algerie’. Two ...
DOI:
10.1016/j.postharvbio.2020.111356

4. Robust tests for time series comparison based on Laplace periodograms

Author:
Jin, Lei
Source:
Computational statistics & data analysis 2021 v.160 pp. 107223
ISSN:
0167-9473
Subject:
mechanical damage,   etc   ; Monte Carlo method; time series analysis; vibration;     Show all 4 Subjects
Abstract:
... Statistical comparison of time series is useful for the detection of mechanical damage and many other real-world applications. New methods have been proposed to check whether two semi-stationary time series have the same normalized dynamics. The proposed methods differ from traditional methods in that they are based on the Laplace periodogram, which is a robust tool to analyze the serial dependenc ...
DOI:
10.1016/j.csda.2021.107223

5. Grasping mode analysis and adaptive impedance control for apple harvesting robotic grippers

Author:
Ji, Wei; Zhang, Jiangwei; Xu, Bo; Tang, Chencheng; Zhao, Dean
Source:
Computers and electronics in agriculture 2021 v.186 pp. 106210
ISSN:
0168-1699
Subject:
mechanical damage,   etc   ; agriculture; apples; electronics; models; plastic deformation; robots; viscoelasticity;     Show all 8 Subjects
Abstract:
... In order to reduce the mechanical damage caused by apple harvesting robot to apples and realize the non-destructive grasping during the grasping process, an adaptive impedance control strategy for apple harvesting robot compliant grasping is proposed based on the analysis of grasping modes in this paper. Firstly, burgers viscoelastic model is established to describe the rheological characteristics ...
DOI:
10.1016/j.compag.2021.106210

6. Development and Performance Evaluation of Metering Mechanism for Planting Garlic Cloves

Author:
Zilpilwar, Shubham; Yadav, Rajvir; Gajjar, Punil; Jakasania, Ronak
Source:
Agricultural research 2021 v.10 no.2 pp. 274-284
ISSN:
2249-720X
Subject:
mechanical damage,   etc   ; Allium sativum; agricultural research; garlic; germination; soil; India;     Show all 7 Subjects
Abstract:
... Garlic is commonly known as Allium sativum L. belongs to “Alliaceae” family. In India, garlic is planted manually or by seed drill, and due to uneven seed dropping, seed losses increase. The precision planting implies accurate spacing of single seeds in the row with proper planting depth and creating a uniform germination environment for each seed. The cup-feed-type metering mechanism were designe ...
DOI:
10.1007/s40003-020-00492-1

7. Development of a Healable Bulk Heterojunction Using Conjugated Donor Polymers Based on Thymine-Functionalized Side Chains

Author:
Yoon, Seongwon; Lee, Keun Jun; Park, Sungmin; Kim, Taehee; Im, Sang Hyuk; Ahn, Hyungju; Son, Hae Jung
Source:
Macromolecules 2021 v.54 no.7 pp. 3478-3488
ISSN:
1520-5835
Subject:
mechanical damage,   etc   ; deformation; hydrogen; melamine; semiconductors; solar energy; thymine;     Show all 7 Subjects
Abstract:
... Developing intrinsically self-healable semiconducting polymers is particularly important for realizing stretchable electronic devices which can spontaneously recover their mechanical damage. We synthesized a series of conjugated donor polymers (PTO2-tm series) functionalized with a thymine group at the terminal of the side chain. Bulk heterojunction (BHJ) films of PTO2-tm polymers blended with an ...
DOI:
10.1021/acs.macromol.0c02673

8. Developing an accelerated vibration simulation test for packaged bananas

Author:
Fernando, Indika; Fei, Jiangang; Stanley, Roger; Enshaei, Hossein; Rouillard, Vincent
Source:
Postharvest biology and technology 2021 v.173 pp. 111400
ISSN:
0925-5214
Subject:
mechanical damage,   etc   ; exposure duration; models; road transportation; vibration;     Show all 5 Subjects
Abstract:
... Mechanical damage in packaged fruits is known to be exacerbated by the intensity and exposure duration of vibration excitation during road transport. However, the current single degree of freedom (SDOF) vibration simulation test standards for road vehicle transport have limitations for simulating long distance road trips. The accelerated vibration simulation testing, based on the Basquin model of ...
DOI:
10.1016/j.postharvbio.2020.111400

9. Impact of Processing Factors on Quality of Frozen Vegetables and Fruits

Author:
van der Sman, R. G. M.
Source:
Food engineering reviews 2020 v.12 no.4 pp. 399-420
ISSN:
1866-7910
Subject:
mechanical damage,   etc   ; ice; product quality;     Show all 3 Subjects
Abstract:
... In this paper I review the production of frozen vegetables and fruits from a chain perspective. I argue that the final quality of the frozen product still can be improved via (a) optimization of the complete existing production chain towards quality, and/or (b) introduction of some promising novel processing technology. For this optimization, knowledge is required how all processing steps impact t ...
DOI:
10.1007/s12393-020-09216-1

10. A source-sink model explains the difference in the metabolic mechanism of mechanical damage to young and senescing leaves in Catharanthus roseus

Author:
Chen, Qi; Lu, Xueyan; Guo, Xiaorui; Xu, Mingyuan; Tang, Zhonghua
Source:
BMC plant biology 2021 v.21 no.1 pp. 154
ISSN:
1471-2229
Subject:
mechanical damage,   etc   ; Catharanthus roseus; death; energy; metabolomics; models; phenolic compounds; secondary metabolites; tricarboxylic acid cycle;     Show all 9 Subjects
Abstract:
... BACKGROUND: Mechanical damage is an unavoidable threat to the growth and survival of plants. Although a wound to senescing (lower) leaves improves plant vitality, a wound to younger (upper) leaves often causes damage to or death of the whole plant. Source-sink models are often used to explain how plants respond to biotic or abiotic stresses. In this study, a source-sink model was used to explain t ...
DOI:
10.1186/s12870-021-02934-6

11. Red drupelet reversion in blackberries caused by mechanical damage is not linked to a reduction in anthocyanin content

Author:
Flores-Sosa, Angel R.; Soto-Magaña, Diana; Gonzalez-de la Vara, Luis E.; Sanchez-Segura, Lino; Bah, Moustapha; Rivera-Pastrana, Dulce M.; Nava, Gerardo M.; Mercado-Silva, Edmundo M.
Source:
Postharvest biology and technology 2021 v.180 pp. 111618
ISSN:
0925-5214
Subject:
mechanical damage,   etc   ; anthocyanins; blackberries; color; cultivars; fluorescence; fruits; microscopy; models; transportation; vibration;     Show all 11 Subjects
Abstract:
... Red Drupelet Reversion (RDR) in blackberry is a physiological disorder where numerous fruit drupelets regress to red from black color during post-harvest handling. The specific mechanism causing RDR is still unknown; however, numerous studies have suggested that anthocyanin contents could be involved in this phenomenon. Recently, it has been reported that RDR in cultivars ‘Ouachita’, ‘Triple Crown ...
DOI:
10.1016/j.postharvbio.2021.111618

12. Impedance-based diagnosis of internal mechanical damage for large-format lithium-ion batteries

Author:
Xiao, Feiyu; Xing, Bobin; Kong, Lingzhao; Xia, Yong
Source:
Energy 2021 v.230 pp. 120855
ISSN:
0360-5442
Subject:
mechanical damage,   etc   ; dielectric spectroscopy; early diagnosis; energy; necropsy; plastic deformation; risk;     Show all 7 Subjects
Abstract:
... Recent technical advances of lithium-ion batteries (LIBs) are indispensable in prosperous development of electric vehicles (EVs). However, application of LIB still suffers some technical bottlenecks, among which an important issue is how to detect mechanical deformation inducing short circuit and subsequent fire or explosion. Here we propose an approach to diagnose early internal mechanical damage ...
DOI:
10.1016/j.energy.2021.120855

13. A study on the morphology of natural microfractures in marine and continental transitional shale based on scanning electron microscopy image

Author:
Wei, Xiaoliang; Zhang, Yuxing; Zhang, Shun; Zhang, Jinchuan; Shi, Miao
Source:
Micron 2021 v.148 pp. 103105
ISSN:
0968-4328
Subject:
mechanical damage,   etc   ; calcite; clay; deformation; gold; organic matter; shale; shale gas; shrinkage;     Show all 9 Subjects
Abstract:
... The development of natural microfractures not only directly affects exploitation efficiency of a shale gas reservoir, but also determines the quality and production of the shale gas reservoir. The environment, in which the shale forms, is considered to be the fundamental cause of shale pore formation and deformation. However, the traditional method of observing shale samples using field-emission s ...
DOI:
10.1016/j.micron.2021.103105

14. Burgers viscoelastic model-based variable stiffness design of compliant clamping mechanism for leafy greens harvesting

Author:
Zou, Liangliang; Yuan, Jin; Liu, Xuemei; Li, Jinguang; Zhang, Ping; Niu, Ziru
Source:
Biosystems engineering 2021 v.208 pp. 1-15
ISSN:
1537-5110
Subject:
mechanical damage,   etc   ; algorithms; deformation; energy; equations; simulation models; spinach; springs (parts and components); viscoelasticity;     Show all 9 Subjects
Abstract:
... To prevent mechanical damage during the feeding and conveying process for leafy greens when roots harvesting, it is necessary to redesign the clamping mechanism in consideration of the rheological properties of leafy greens under the mechanical compression. This study takes spinach, a typical representative of leafy greens, as the research object. Firstly, the rheological constitutive equation for ...
DOI:
10.1016/j.biosystemseng.2021.05.007

15. Effects on relaxation properties of Chinese cabbage (Brassica campestris L.) subjected to different compression directions

Author:
Zhang, Jing; Wang, Jun; Hao, Yifeng; Zheng, Chengyu; Du, Dongdong
Source:
Biosystems engineering 2021 v.207 pp. 81-91
ISSN:
1537-5110
Subject:
mechanical damage,   etc   ; Brassica rapa subsp. oleifera; Chinese cabbage; cell structures; deformation; extracellular space; viscoelasticity; viscosity;     Show all 8 Subjects
Abstract:
... Relaxation tests were performed to determine the viscoelastic properties of intact Chinese cabbage under transverse and longitudinal loading using Maxwell models. The differences in the relaxation properties for different compression directions were evaluated and a variety of macroscopic deformation characteristics was described using a stereomicroscope. It was found that Chinese cabbage showed rh ...
DOI:
10.1016/j.biosystemseng.2021.04.007

16. High-performance layered potassium vanadium oxide for K-ion batteries enabled by reduced long-range structural order

Author:
Niu, Xiaogang; Qu, Jiale; Hong, Youran; Deng, Leqing; Wang, Ruiting; Feng, Meiying; Wang, Jiangwei; Zeng, Liang; Zhang, Qianfan; Guo, Lin; Zhu, Yujie
Source:
Journal of materials chemistry A 2021 v.9 no.22 pp. 13125-13134
ISSN:
2050-7496
Subject:
mechanical damage,   etc   ; cathodes; electrochemistry; energy; nanocrystals; phase transition; potassium; spectroscopy; vanadium;     Show all 9 Subjects
Abstract:
... Potassium ion batteries (KIBs) are attracting increasing research interest as a potential low-cost energy storage system. Currently, the development of KIBs is mainly hindered by the poor cycle life of cathode materials, caused by the large K-ion-induced mechanical failure during charge–discharge. Herein, taking layered K₀.₅V₂O₅ as an example, we show that reducing the long-range structural order ...
DOI:
10.1039/d1ta01807h

17. Early Detection of Freeze Damage in Navel Orange Fruit Using Nondestructive Low Intensity Ultrasound Coupled with Machine Learning

Author:
Soltani Firouz, Mahmoud; Farahmandi, Ali; Hosseinpour, Soleiman
Source:
Food analytical methods 2021 v.14 no.6 pp. 1140-1149
ISSN:
1936-9751
Subject:
mechanical damage,   etc   ; Citrus sinensis; ambient temperature; frost injury; fruits; support vector machines; ultrasonics;     Show all 7 Subjects
Abstract:
... Freeze damage in the orange fruit is a serious problem, especially when the environmental temperature reaches the critical freezing point. Separating the damaged fruit from the healthy ones after harvesting and before storing is an important and fundamental process. Therefore, the aim of this research was to develop a nondestructive system for detecting freeze damage in the orange fruit just after ...
DOI:
10.1007/s12161-020-01942-w

18. Visually imperceptible mechanical damage of harvested tomatoes changes ethylene production, color, enzyme activity, and volatile compounds profile

Author:
Spricigo, Poliana Cristina; Freitas, Thais Pádua; Purgatto, Eduardo; Ferreira, Marcos David; Correa, Daniel Souza; Bai, Jinhe; Brecht, Jeffrey Karl
Source:
Postharvest biology and technology 2021 v.176 pp. 111503
ISSN:
0925-5214
Subject:
mechanical damage,   etc   ; carbon dioxide; color; enzyme activity; ethylene; ethylene production; fruits; horticulture; tomatoes;     Show all 9 Subjects
Abstract:
... Improper postharvest handling often impairs horticultural quality even when damage is visually imperceptible. In this study, tomato fruit were subjected to controlled compressive forces (196.13 N) and the effects of this mechanical damage were evaluated. The following parameters were assessed: production of CO₂, ethylene (C₂H₄), color, enzymatic activity (LOX, HPL and ADH) and volatile compounds. ...
Handle:
10113/7305213
DOI:
10.1016/j.postharvbio.2021.111503

19. Liquid-like polymer-based self-cleaning coating for effective prevention of liquid foods contaminations

Author:
Yang, Chengduan; Wu, Qianni; Zhong, Luyu; Lyu, Chenglin; He, Gen; Yang, Cheng; Li, Xiangling; Huang, Xinshuo; Hu, Ning; Chen, Meiwan; Hang, Tian; Xie, Xi
Source:
Journal of colloid and interface science 2021 v.589 pp. 327-335
ISSN:
0021-9797
Subject:
mechanical damage,   etc   ; adhesion; biocompatibility; biofilm; environmental health; friction; glass; humans; hydrophobicity; liquids; polydimethylsiloxane; saliva;     Show all 12 Subjects
Abstract:
... Liquid food containers commonly suffer from inevitable contamination and even biofilm formation due to the adhesion of food residuals or saliva, which requires detergents to clean. Although previously reported superhydrophobic and omniphobic coatings can resist the adhesion of liquids, the requirements of specific nanostructures or infused lubricants limit their applications in food containers. He ...
DOI:
10.1016/j.jcis.2021.01.014

20. Optimized Hierarchical Structure and Chemical Gradients Promote the Biomechanical Functions of the Spike of Mantis Shrimps

Author:
Li, Shan; Liu, Pan; Lin, Weiqin; Tian, Jie; Miao, Chunguang; Zhang, Xiao; Zhang, Ruogu; Peng, Jinlan; Zhang, Hong; Gu, Ping; Zhang, Zuoqi; Wang, Zhengzhi; Luo, Tianzhi
Source:
ACS applied materials & interfaces 2021 v.13 no.15 pp. 17380-17391
ISSN:
1944-8252
Subject:
mechanical damage,   etc   ; Mantis; biomechanics; biomimetics; deformation; energy; finite element analysis; shrimp;     Show all 8 Subjects
Abstract:
... The tail spike of the mantis shrimp is the appendage for counteracting the enemy from behind. Here, we investigate the correlations between the chemical compositions, the microstructures, and the mechanical properties of the spike. We find that the spike is a hollow beam with a varying cross section along the length. The cross section comprises four different layers with distinct features of micro ...
DOI:
10.1021/acsami.1c02867