Dynamic Characteristics of Lifting Pipe on a Retrofitted Mining Vessel

Lifting pipe used in deep ocean mining is the tool to transport mineral from seabed to vessel. In this study, a vessel was retrofitted as an experimental ship for deep ocean mining with a U-type lifting pipe installed on the right side of vessel. Assuming pipe as a rigid structure, the impact of pipe on movements of vessel were discussed based on frequency domain method for hydrodynamic analysis.

Natural frequencies and mode shapes in zero-force members of a truss

Trusses are everywhere; they are used in bridges, antenna towers, cranes, even in parts of the International Space Station. And for good reason, they allow us to create strong structures while using materials in very efficient and cost-effective way. Trusses it is essentially a rigid structure made up of a collection of straight members. The type of truss depends on how the horizontal and diagonal beams are arranged.

Laws of Motion of the Lower Extremities and Structural-parametric Synthesis of Electro-hydraulic Executive Modules of the Active Exoskeleton According to the Criterion of Energy Suffiency

The object of the research is the electro-hydraulic executive modules (drives) of the exoskeleton of the lower extremities with a rigid structure of the power frame. The problem of schematic and parametric execution of modules located in the linkage joints of the exoskeleton which is used for verticalization of patients is considered. The aim of the study is to estimates energy consumption, sensitivity, establish a rational structure and parameters of modules that provide programmed movement according to the criterion of energy sufficiency. The laws of motion and diagrams of loads required for lifting a patient from a sitting position are presented.

The Two Modes of Foreign Engagement by the Constitutional Court of Korea

The Constitutional Court of Korea (CCK) has engaged with foreign law and practices in two distinct manners. While the CCK has interacted with foreign constitutional adjudicatory organs outside the courtroom, it has also developed comparative law practices inside the courtroom. This article aims to examine the interaction between the CCK's two modes of foreign engagement. The chronological inquiry, substantiated by the interviews with former and current legal practitioners of the CCK, demonstrates the gap between the CCK's two modes of foreign engagement. The CCK's evolving extrajudicial activities have provided the repositories of information adequate for the deliberation of individual cases. However, the CCK's rigid structure for comparative law practices, which was established in its initial years to learn from traditionally influential jurisdictions, restricts these repositories from being fully utilised inside the courtroom. The CCK's failure to fully incorporate its developments in its extrajudicial activities into comparative law practices disallows the CCK to grasp an evolving picture of foreign constitutional adjudicatory organs.

Scholl Reaction of an ortho-Phenylene-bridged Cyclic Pyrrole-Thiophene Hybrid Hexamer

Scholl reaction of ortho-phenylene-bridged cyclic pyrrole-thiophene hybrid hexamer exclusively gave a cyclophane-type compound of [5]heterohelicenes in 45% yield. The structure was unambiguously revealed by X-ray diffraction analysis. This helicenophane-type compound showed sharp absorption and fluorescence spectra, reflecting its rigid structure. The reaction path was analyzed on the basis of DFT calculations. The reaction path was analyzed on the basis of DFT calculations, and it was found that the formation of 8 is thermodynamically favored and further oxidation is prohibited due to the increased strain energy.

High Pressure Treatment Modifies Rigid Structure of Myoglobin and Improves Its Digestibility

Objectives Myoglobin is a special globular protein composed of a polypeptides chain and a heme group. Our previous in vitro and in vivo studies have shown that myoglobin is less susceptible to digestion because of its rigid structure. High pressure treatment is gaining more and more popularity in meat industry. To improve the digestibility and nutritional value of myoglobin, the effects of high pressure treatment on the structural and nutritional properties of myoglobin were investigated. Methods Myoglobin was treated during 100–400 MPa for 20 min, spectroscopic techniques and an in vitro digestion model were performed. Results High pressure treatment induced unfolding of globin and dissociation of heme, with an increase in the absorbance of Soret band and a reduction in the intensity of intrinsic and synchronous fluorescence spectra. Some certain changes occurred in the dissociated heme group, as the content of heme and metmyoglobin decreased. The gastric and intestinal digestibility of myoglobin increased as the pressure rose. Conclusions The results indicated that high pressure treatment could be a promising technology to improve digestibility of myoglobin by modifying its structure to improve its nutritional value. Funding Sources This work was supported by the grants from NSFC (32072211).