The Experts below are selected from a list of 46674 Experts worldwide ranked by ideXlab platform
Yonghua Zheng - One of the best experts on this subject based on the ideXlab platform.
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effect of nano packing on preservation quality of fresh strawberry fragaria ananassa duch cv fengxiang during storage at 4 c
Journal of Food Science, 2010Co-Authors: Fangmei Yang, Zhihong Xin, Liang Zhao, Yonghua ZhengAbstract:UNLABELLED A novel nano-packing material with lower relative humidity, oxygen transmission rate and high Longitudinal Strength was synthesized by blending polyethylene with nano-powder (nano-Ag, kaolin, anatase TiO(2), rutile TiO(2)), and its effect on preservation quality of strawberry fruits (Fragaria ananassa Duch. cv Fengxiang) was investigated during storage at 4 degrees C. Results showed that nano-packaging was able to maintain the sensory, physicochemical, and physiological quality of strawberry fruits at a higher level compared with the normal packing (polyethylene bags). After a 12-d storage, decreases in the contents of total soluble solids, titratable acidity, and ascorbic acid of nano-packing were significantly inhibited. Meanwhile, decay rate, anthocyanin, and malondialdehyde contents were decreased to 16.7%, 26.3 mg/100g, 66.3 micromol/g for nano-packing and 26.8%, 31.9 mg/100g, 75.4 micromol/g for normal packing; polyphenoloxidase (PPO) and pyrogallol peroxidase (POD) activities were significantly lower in nano-packing than the control. These data indicated that the nano-packaging might provide an attractive alternative to improve preservation quality of the strawberry fruits during extended storage. PRACTICAL APPLICATION Nano-packing exhibited identified quality benefits applicable to the preservation of fresh strawberry. Furthermore, nano-packing has the advantages of simple processing and feasibility to be industrialized in contrast with other storages. Thus, the utilization of nano-packing will likely assist commercial producers and retailers in extending the shelf life of products over a broader range in the future.
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effect of nano packing on preservation quality of fresh strawberry fragaria ananassa duch cv fengxiang during storage at 4 c
Journal of Food Science, 2010Co-Authors: Fangmei Yang, Liyan Zhao, Hongmei Li, Feng Li, Yonghua Zheng, Qiuhui HuAbstract:: A novel nano-packing material with lower relative humidity, oxygen transmission rate and high Longitudinal Strength was synthesized by blending polyethylene with nano-powder (nano-Ag, kaolin, anatase TiO2, rutile TiO2), and its effect on preservation quality of strawberry fruits (Fragaria ananassa Duch. cv Fengxiang) was investigated during storage at 4 °C. Results showed that nano-packaging was able to maintain the sensory, physicochemical, and physiological quality of strawberry fruits at a higher level compared with the normal packing (polyethylene bags). After a 12-d storage, decreases in the contents of total soluble solids, titratable acidity, and ascorbic acid of nano-packing were significantly inhibited. Meanwhile, decay rate, anthocyanin, and malondialdehyde contents were decreased to 16.7%, 26.3 mg/100g, 66.3 μmol/g for nano-packing and 26.8%, 31.9 mg/100g, 75.4 μmol/g for normal packing; polyphenoloxidase (PPO) and pyrogallol peroxidase (POD) activities were significantly lower in nano-packing than the control. These data indicated that the nano-packaging might provide an attractive alternative to improve preservation quality of the strawberry fruits during extended storage. Practical Application: Nano-packing exhibited identified quality benefits applicable to the preservation of fresh strawberry. Furthermore, nano-packing has the advantages of simple processing and feasibility to be industrialized in contrast with other storages. Thus, the utilization of nano-packing will likely assist commercial producers and retailers in extending the shelf life of products over a broader range in the future.
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effect of nano packing on preservation quality of chinese jujube ziziphus jujuba mill var inermis bunge rehd
Food Chemistry, 2009Co-Authors: Hongmei Li, Liyan Zhao, Feng Li, Lin Wang, Jianchun Sheng, Hongmei Xiao, Yonghua Zheng, Qiuhui HuAbstract:Abstract The effect of a novel nano-packing material on preservation quality of Chinese jujube ( Ziziphus jujuba Mill. var . inermis (Bunge) Rehd ) during room temperature storage was investigated. The nano-packing material with lower relative humidity, oxygen transmission rate and high Longitudinal Strength (2.05 g/m 2 24 h, 12.56 cm 3 /m 2 24 h 0.1 MPa and 40.16 MPa, respectively) was synthesized by blending polyethylene with nano-powder (nano-Ag, kaolin, anatase TiO 2 , rutile TiO 2 ). The results showed that the nano-packing material had a quite beneficial effect on physicochemical and sensory quality compared with normal packing material. After 12-day storage, fruit softening, weight loss, browning and climatic evolution of nano-packing were significantly inhibited. Meanwhile, the contents of titrable acid and ascorbic acid were decreased to 0.21%, 251 mg/100 g, for nano-packing and 0.15%, 198 mg/100 g, for normal packing; The contents of total soluble sugar, reducing sugar, total soluble solids and malondialdehyde were increased to 28.4%, 5.2%, 19.5% and 98.9 μmol/g for nano-packing and 30.0%, 6.3%, 23.1% and 149 μmol/g for normal packing. Therefore, the nano-packing could be applied for preservation of Chinese jujube to expand its shelf life and improve preservation quality.
Qiuhui Hu - One of the best experts on this subject based on the ideXlab platform.
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Effect of nanocomposite-based packaging on postharvest quality of ethylene-treated kiwifruit (Actinidia deliciosa) during cold storage
Food Research International, 2011Co-Authors: Qiuhui Hu, Yanting Yang, Ning Ma, Yong Fang, Liyan ZhaoAbstract:A novel nanocomposite-based packaging (NCP) was prepared by blending polyethylene (PE) with nano-Ag, nano-TiO2and montmorillonite. The effects of NCP on the quality parameters of ethylene-treated mature kiwifruit were investigated during the 42d of storage at 4°C. The results showed that adding nanoparticles to the PE significantly decreased the oxygen, water vapor permeability and Longitudinal Strength, and inhibited spore germination. The weight loss, softening, color variation and soluble solid content of kiwifruit were significantly inhibited by 22.67%, 124.84%, 23.46% and 14.42% respectively, which indicated that NCP could delay the ripening of kiwifruit. However, ascorbic acid and total phenols contents in NCP-treated fruit were increased compared with the controls. Additionally, kiwifruit in NCP exhibited 57.44% lower headspace ethylene concentration, 29.44% for malondialdehyde (MDA), lower polyphenol oxidase (PPO) activity and higher peroxidase (POD) activity than the controls. These results suggest that NCP may be a useful technique to reduce fruit decay and maintain quality in kiwifruits during postharvest storage. © 2011.
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effect of nano packing on preservation quality of fresh strawberry fragaria ananassa duch cv fengxiang during storage at 4 c
Journal of Food Science, 2010Co-Authors: Fangmei Yang, Liyan Zhao, Hongmei Li, Feng Li, Yonghua Zheng, Qiuhui HuAbstract:: A novel nano-packing material with lower relative humidity, oxygen transmission rate and high Longitudinal Strength was synthesized by blending polyethylene with nano-powder (nano-Ag, kaolin, anatase TiO2, rutile TiO2), and its effect on preservation quality of strawberry fruits (Fragaria ananassa Duch. cv Fengxiang) was investigated during storage at 4 °C. Results showed that nano-packaging was able to maintain the sensory, physicochemical, and physiological quality of strawberry fruits at a higher level compared with the normal packing (polyethylene bags). After a 12-d storage, decreases in the contents of total soluble solids, titratable acidity, and ascorbic acid of nano-packing were significantly inhibited. Meanwhile, decay rate, anthocyanin, and malondialdehyde contents were decreased to 16.7%, 26.3 mg/100g, 66.3 μmol/g for nano-packing and 26.8%, 31.9 mg/100g, 75.4 μmol/g for normal packing; polyphenoloxidase (PPO) and pyrogallol peroxidase (POD) activities were significantly lower in nano-packing than the control. These data indicated that the nano-packaging might provide an attractive alternative to improve preservation quality of the strawberry fruits during extended storage. Practical Application: Nano-packing exhibited identified quality benefits applicable to the preservation of fresh strawberry. Furthermore, nano-packing has the advantages of simple processing and feasibility to be industrialized in contrast with other storages. Thus, the utilization of nano-packing will likely assist commercial producers and retailers in extending the shelf life of products over a broader range in the future.
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effect of nano packing on preservation quality of chinese jujube ziziphus jujuba mill var inermis bunge rehd
Food Chemistry, 2009Co-Authors: Hongmei Li, Liyan Zhao, Feng Li, Lin Wang, Jianchun Sheng, Hongmei Xiao, Yonghua Zheng, Qiuhui HuAbstract:Abstract The effect of a novel nano-packing material on preservation quality of Chinese jujube ( Ziziphus jujuba Mill. var . inermis (Bunge) Rehd ) during room temperature storage was investigated. The nano-packing material with lower relative humidity, oxygen transmission rate and high Longitudinal Strength (2.05 g/m 2 24 h, 12.56 cm 3 /m 2 24 h 0.1 MPa and 40.16 MPa, respectively) was synthesized by blending polyethylene with nano-powder (nano-Ag, kaolin, anatase TiO 2 , rutile TiO 2 ). The results showed that the nano-packing material had a quite beneficial effect on physicochemical and sensory quality compared with normal packing material. After 12-day storage, fruit softening, weight loss, browning and climatic evolution of nano-packing were significantly inhibited. Meanwhile, the contents of titrable acid and ascorbic acid were decreased to 0.21%, 251 mg/100 g, for nano-packing and 0.15%, 198 mg/100 g, for normal packing; The contents of total soluble sugar, reducing sugar, total soluble solids and malondialdehyde were increased to 28.4%, 5.2%, 19.5% and 98.9 μmol/g for nano-packing and 30.0%, 6.3%, 23.1% and 149 μmol/g for normal packing. Therefore, the nano-packing could be applied for preservation of Chinese jujube to expand its shelf life and improve preservation quality.
Guedes C Soares - One of the best experts on this subject based on the ideXlab platform.
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experimental and numerical analysis of ultimate Strength of inland catamaran subjected to vertical bending moment
Ocean Engineering, 2019Co-Authors: Bin Liu, Y Garbatov, Guedes C SoaresAbstract:Abstract An experiment is performed of the ultimate Strength an inland catamaran subjected to a vertical bending moment, and a finite element analysis of the scaled model is also conducted. The inland vessels are designed with a shallow draught and a relatively small section modulus and moment of inertia of the hull cross-section, which makes the ultimate Longitudinal Strength much more critical in structural behaviour in severe weather conditions. A large-scale specimen is designed employing the scaling laws and the linear finite element static analysis. During the experiment, the load-displacement and strain data, overall and local structural collapse are recorded. The experimental results are compared with the finite element simulations, and a good agreement is achieved between the experimental and numerical results of the large-scale specimen and prototype-ship of the catamaran. The established procedure for estimating the ultimate Strength of the catamaran is proven to be accurate. The improvement of the ship ultimate Longitudinal Strength is also presented.
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Approximate Assessment of the Ultimate Longitudinal Strength of the Hull Girder
2015Co-Authors: J. M. Gordo, Guedes C Soares, D. FaulknerAbstract:A method is presented to estimate the ultimate moment based on a simplified approach to represent the behavior of stiffened plate columns. The assessment of the Strength of a very large crude carrier is performed and compared with the moment at failure in hogging estimated by other methods applied to the same case. The proposed method allows the prediction of the degradation of the Strength due to corrosion and residual stresses. It also allows the evaluation of the Strength of the hull at several heeling conditions. Finally, an analysis of the efficiency of the high tensile steel is carried out. 1
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Longitudinal Strength reliability of a tanker hull accidentally grounded
Structural Safety, 2009Co-Authors: R M Luis, A P Teixeira, Guedes C SoaresAbstract:Abstract This paper presents a reliability analysis of a damaged Suezmax double hull tanker, using a first order reliability method. The accidental grounding being analyzed is assumed to be centered on the keel, which is the worst possible scenario from a Strength degradation point of view. The ultimate Strength of the damaged tanker, to be used in the formulation, is calculated by means of a specific structural code, in which the damage is simulated by the removal of the damaged elements. Different sizes of the damage are analyzed and a relationship is established with the reliability index related to the ultimate Strength. The wave induced loads are calculated from long-term distributions related to the “Global Wave Statistics” database. The still-water loads are defined from the ship loading manual. A parametric study about the impact of the ultimate bending moment of the damaged ship on the reliability index is then performed.
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reliability assessment for ultimate Longitudinal Strength of ship hulls in composite materials
Probabilistic Engineering Mechanics, 2007Co-Authors: Nian-zhong Chen, Guedes C SoaresAbstract:Abstract A method for reliability assessment of the ultimate Longitudinal Strength of ship hulls in composite materials is described. The ultimate Longitudinal Strength of a ship hull is predicted by a progressive collapse analysis based on load–average strain curves of stiffened composite panels that are developed by a progressive failure nonlinear finite element analysis. Sagging, hogging and slamming conditions are regarded as three extreme loading conditions and the corresponding limit state functions are established with an appropriate stochastic modeling of the basic design variables, such as the modeling uncertainties, the materials properties, the lamina thickness, the lamination angle, the still-water moment, the wave-induced moment, and the slamming-induced moment. The reliability estimation is achieved by an improved first-order reliability algorithm. The sensitivities of the reliability estimates with respect to model parameters are determined and those parameters with small sensitivity factors are replaced by deterministic values to improve the computational efficiency in the prediction of the ultimate Longitudinal Strength of ship hull. An all-composite ship is analyzed for demonstration.
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Longitudinal Strength analysis of ship hulls of composite materials under sagging moments
Composite Structures, 2007Co-Authors: Nian-zhong Chen, Guedes C SoaresAbstract:An approach to estimate the Longitudinal Strength of ship hulls in composite materials is presented in the paper. Typical ship configurations have as dominant failure mode the failure of the deck under compression associated with sagging moments. Ship hulls are modeled as assemblies of stiffened composite panels. Buckling, material failure and ultimate collapse of the stiffened panels are predicted by nonlinear finite element analysis, which is based on a degenerated three-dimensional laminated composite shell element with updated Lagrangian formulation and first-order shear deformable kinematics. According to buckling, material failure and ultimate collapse of stiffened panels, the corresponding Longitudinal Strengths of ship hull are derived from a simplified method. A ship hull under sagging is analysed as an example application.
Fangmei Yang - One of the best experts on this subject based on the ideXlab platform.
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effect of nano packing on preservation quality of fresh strawberry fragaria ananassa duch cv fengxiang during storage at 4 c
Journal of Food Science, 2010Co-Authors: Fangmei Yang, Liyan Zhao, Hongmei Li, Feng Li, Yonghua Zheng, Qiuhui HuAbstract:: A novel nano-packing material with lower relative humidity, oxygen transmission rate and high Longitudinal Strength was synthesized by blending polyethylene with nano-powder (nano-Ag, kaolin, anatase TiO2, rutile TiO2), and its effect on preservation quality of strawberry fruits (Fragaria ananassa Duch. cv Fengxiang) was investigated during storage at 4 °C. Results showed that nano-packaging was able to maintain the sensory, physicochemical, and physiological quality of strawberry fruits at a higher level compared with the normal packing (polyethylene bags). After a 12-d storage, decreases in the contents of total soluble solids, titratable acidity, and ascorbic acid of nano-packing were significantly inhibited. Meanwhile, decay rate, anthocyanin, and malondialdehyde contents were decreased to 16.7%, 26.3 mg/100g, 66.3 μmol/g for nano-packing and 26.8%, 31.9 mg/100g, 75.4 μmol/g for normal packing; polyphenoloxidase (PPO) and pyrogallol peroxidase (POD) activities were significantly lower in nano-packing than the control. These data indicated that the nano-packaging might provide an attractive alternative to improve preservation quality of the strawberry fruits during extended storage. Practical Application: Nano-packing exhibited identified quality benefits applicable to the preservation of fresh strawberry. Furthermore, nano-packing has the advantages of simple processing and feasibility to be industrialized in contrast with other storages. Thus, the utilization of nano-packing will likely assist commercial producers and retailers in extending the shelf life of products over a broader range in the future.
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effect of nano packing on preservation quality of fresh strawberry fragaria ananassa duch cv fengxiang during storage at 4 c
Journal of Food Science, 2010Co-Authors: Fangmei Yang, Zhihong Xin, Liang Zhao, Yonghua ZhengAbstract:UNLABELLED A novel nano-packing material with lower relative humidity, oxygen transmission rate and high Longitudinal Strength was synthesized by blending polyethylene with nano-powder (nano-Ag, kaolin, anatase TiO(2), rutile TiO(2)), and its effect on preservation quality of strawberry fruits (Fragaria ananassa Duch. cv Fengxiang) was investigated during storage at 4 degrees C. Results showed that nano-packaging was able to maintain the sensory, physicochemical, and physiological quality of strawberry fruits at a higher level compared with the normal packing (polyethylene bags). After a 12-d storage, decreases in the contents of total soluble solids, titratable acidity, and ascorbic acid of nano-packing were significantly inhibited. Meanwhile, decay rate, anthocyanin, and malondialdehyde contents were decreased to 16.7%, 26.3 mg/100g, 66.3 micromol/g for nano-packing and 26.8%, 31.9 mg/100g, 75.4 micromol/g for normal packing; polyphenoloxidase (PPO) and pyrogallol peroxidase (POD) activities were significantly lower in nano-packing than the control. These data indicated that the nano-packaging might provide an attractive alternative to improve preservation quality of the strawberry fruits during extended storage. PRACTICAL APPLICATION Nano-packing exhibited identified quality benefits applicable to the preservation of fresh strawberry. Furthermore, nano-packing has the advantages of simple processing and feasibility to be industrialized in contrast with other storages. Thus, the utilization of nano-packing will likely assist commercial producers and retailers in extending the shelf life of products over a broader range in the future.
Jeom Kee Paik - One of the best experts on this subject based on the ideXlab platform.
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a practical diagram to determine the residual Longitudinal Strength of grounded ship in northern sea route
Ships and Offshore Structures, 2020Co-Authors: Do Kyun Kim, Han Byul Kim, Dong Hee Park, Mohd Hairil, Jeom Kee PaikAbstract:In this study, a useful solution is proposed for assessing the safety of the ship’s hull damaged by grounding in Northern Sea Route (NSR) or Arctic sea. In particular, the residual ultimate longitu...
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assessing the risk of ship hull collapse due to collision
Ships and Offshore Structures, 2016Co-Authors: Samy A M Youssef, Do Kyun Kim, Jeom Kee Paik, Bong Ju Kim, Jung Kwan Seo, Muhammad Faisal, F ChengAbstract:This study proposes a method for assessing the risk of ship hull collapse following a collision. A probabilistic approach is applied to establish the relationship between the exceedance probability of collision and the residual ultimate Longitudinal Strength index. A set of credible collision scenarios which represent the entire range of possible collision accidents is selected using a sampling technique based on probability density distributions of influencing parameters. The amount and location of collision damage for selected individual collision scenarios are characterised using the LS-DYNA nonlinear finite element method. The ultimate hull girder Strength of a ship with predefined collision damage is then calculated using the ALPS/HULL intelligent supersize finite element method. To demonstrate the applicability of the proposed method, applied examples are given, involving collisions with a hypothetical Suezmax-class double-hull oil tanker. Based on the results, design formulations for predicting the...
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ultimate Strength performance of tankers associated with industry corrosion addition practices
International Journal of Naval Architecture and Ocean Engineering, 2014Co-Authors: Do Kyun Kim, Han Byul Kim, Xiaoming Zhang, Jeom Kee PaikAbstract:In the ship and offshore structure design, age-related problems such as corrosion damage, local denting, and fatigue damage are important factors to be considered in building a reliable structure as they have a significant influence on the residual structural capacity. In shipping, corrosion addition methods are widely adopted in structural design to prevent structural capacity degradation. The present study focuses on the historical trend of corrosion addition rules for ship structural design and investigates their effects on the ultimate Strength performance such as hull girder and stiffened panel of double hull oil tankers. Three types of rules based on corrosion addition models, namely historic corrosion rules (pre-CSR), Common Structural Rules (CSR), and harmonised Common Structural Rules (CSRH) are considered and compared with two other corrosion models namely UGS model, suggested by the Union of Greek Shipowners (UGS), and Time-Dependent Corrosion Wastage Model (TDCWM). To identify the general trend in the effects of corrosion damage on the ultimate Longitudinal Strength performance, the corrosion addition rules are applied to four representative sizes of double hull oil tankers namely Panamax, Aframax, Suezmax, and VLCC. The results are helpful in understanding the trend of corrosion additions for tanker structures.
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time dependent residual ultimate Longitudinal Strength grounding damage index r d diagram
Ocean Engineering, 2014Co-Authors: Do Kyun Kim, Han Byul Kim, Xiaoming Zhang, Bong Ju Kim, Jung Kwan Seo, Jeom Kee PaikAbstract:Abstract In this study, the development of the R–D diagram taking into account the time-dependent corrosion wastage effect is presented to identify the necessity of applying the time-dependent corrosion wastage on R–D diagram. The R–D (Residual Strength–Damage index) diagram was proposed by Paik et al. (2012) and is an innovative method relating to safety assessment for damaged structures; its feasibility has been confirmed by a previous study concerning double hull oil tankers under grounding damage. Generally, as a result of corrosion, the structural capacity of ships and offshore structures should be decreased in parallel with the operational period. Therefore, an Aframax class double hull oil tanker that has sustained grounding damages and also corrosion with a time-dependent corrosion wastage model (13 years, 19 years and 25 years (net scantlings specified by CSR)) applied to gross (new-built) scantlings is analyzed by the ALPS/HULL progressive hull girder collapse analysis program. Based on the obtained results, the time-dependent R–D diagram is produced and compared with the original R–D diagram. Finally, for practical purposes, empirical formulas based on time-dependent R–D diagrams are proposed to evaluate the residual ultimate Longitudinal Strength of the corroded Aframax class double hull oil tanker under grounding damage. The proposed time-dependent R–D diagrams will be useful for assessing the first-cut safety evaluation for a ship that has sustained grounding damages under different operational periods.
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comparison of residual Strength grounding damage index diagrams for tankers produced by the alps hull isfem and design formula method
International Journal of Naval Architecture and Ocean Engineering, 2013Co-Authors: Do Kyun Kim, Han Byul Kim, Mohd Hairil Mohd, Jeom Kee PaikAbstract:This study compares the Residual ultimate Longitudinal Strength – grounding Damage index (R-D) diagrams produced by two analysis methods: the ALPS/HULL Intelligent Supersize Finite Element Method (ISFEM) and the design formula (modified Paik and Mansour) method – used to assess the safety of damaged ships. The comparison includes four types of double-hull oil tankers: Panamax, Aframax, Suezmax and VLCC. The R-D diagrams were calculated for a series of 50 grounding scenarios. The diagrams were efficiently sampled using the Latin Hypercube Sampling (LHS) technique and comprehensively analysed based on ship size. Finally, the two methods were compared by statistically analysing the differences between their grounding damage indices and ultimate Longitudinal Strength predictions. The findings provide a useful example of how to apply the ultimate Longitudinal Strength analysis method to grounded ships.
