Almeida's “History of Ethiopia”: Recovery of the Preliminary Matter

1923 ◽  
Vol 2 (4) ◽  
pp. 783-804
Author(s):  
E. Denison Ross
Keyword(s):  
Title Page ◽  
Good Fortune ◽  
King's College ◽  
Original Title ◽  
History Of ◽  
Outer Cover

Since the appearance of the last number of this Bulletin I have had the good fortune to find the outer cover of the King's College manuscript of Almeida's History of Ethiopia, which had hitherto been missing. The discovery is important, for attached to this cover there was not only the original title page, but also the “Preliminary Matter” referred to by Marsden in his Catalogue, occupying in all eleven folios. The contents are as follows:—

scholarly journals Examination of localization of silymarin and fatty oil in Silybum marianum (L.) Gaertn. fruit

2007 ◽  
Vol 13 (2) ◽  
pp. 55-59 ◽  
Author(s):  
Zora Stoiljkovic ◽  
Slobodan Petrovic ◽  
Biljana Ilic
Keyword(s):  
Petroleum Ether ◽  
Fruit Size ◽  
Soxhlet Extraction ◽  
Physical Characteristics ◽  
Silybum Marianum ◽  
Fatty Oil ◽  
Lowered Pressure ◽  
Mechanical Procedure ◽  
Outer Cover ◽  
Different Origin

Physical characteristics and localization of flavonoids and fatty oil in Silybum marianum (L.) Gaertn. fruit of different origin were examined. Physical characteristics of the fruit were determined by its origin, and samples cultivated on plantations were, concerning their colour, shine, shape and size, very similar to those they originated from. By examination of the fruit size, we wanted to give our contribution to the choice of adequate equipment for picking, cleaning and packing of the fruit. Using a suitable mechanical procedure, the separation of the fruit into its inner part (endosperm) and outer cover (testa) was carried out. The Soxhlet extraction was carried out using petroleum ether (40-70?C) and methanol, The silymarin content (calculated as silibinin) was spectrophotometrically determined in the whole fruit (1.94-2.45%) and its respective parts: endosperm (0.19-0.33%) and testa (4.75-6.01%). By evaporation of petroleum ether extracts under the lowered pressure we determined the oil content in the whole fruit (19.38-24.08%), endosperm (27.85-34.19%) and testa (2.45-4.34%). We also established that more than 94% of silymarin was located in the testa more than 88% of fatty oil was localized in the fruit endosperm. The obtained results indicated that it was better to use testa, than whole fruit, when extracting silymarin.

Variation propagation modeling and analysis of automotive body outer cover panels assembly systems

2019 ◽  
Vol 39 (2) ◽  
pp. 272-286 ◽  
Author(s):  
Wenwu Han ◽  
Qianwang Deng ◽  
Wenhui Lin ◽  
Xuran Gong ◽  
Sun Ding
Keyword(s):  
Welding Process ◽  
Tolerance Allocation ◽  
Basic Rule ◽  
Assembly Systems ◽  
Practical Case ◽  
Content Type ◽  
Automotive Body ◽  
Threaded Connection ◽  
Variation Propagation ◽  
Outer Cover

PurposeThis study aims to present a model and analysis of automotive body outer cover panels (OCPs) assembly systems to predict assembly variation. In the automotive industry, the OCPs assembly process directly influences the quality of the automobile body appearance. However, suitable models to describe variation propagation of OCPs assembly systems remain unknown.Design/methodology/approachAn adaptive state space model for OCPs assembly systems is introduced to accurately express variation propagation, including variation accumulation and transition, where two compliant deviations make impacts on key product characteristics (KPCs) of OCP, and the impacts are accumulated from welding process to threaded connection process. Another new source of variation from threaded connection is included in this model. To quantify the influence of variation from threaded connection on variation propagation, the threaded connection sensitivity matrix is introduced to build up a linear relationship between deviation from threaded connection and output deviation in KPCs. This matrix is solved by homogeneous coordinate transformation. The final deviation of KPCs will be transferred to ensure gaps and flushes between two OCPs, and the transition matrix is considered as a unit matrix to build up the transition relationship between different states.FindingsA practical case on the left side body structure is described, where simulation result of variation propagation reveals the basic rule of variation propagation and the significant effect of variation from threaded connection on variation propagation of OCPs assembly system.Originality/valueThe model can be used to predict assembly variation or potential dimension problems at a preliminary assembly phase. The calculated results of assembly variation guide designers or technicians on tolerance allocation, fixture layout design and process planning.

Estimation of Force Reduction on Ocean Structures With Perforated Members

2015 ◽  
Author(s):  
Srinivasan Chandrasekaran ◽  
Madhavi Natarajan ◽  
Lognath Radhakrishnan Sreeramulu
Keyword(s):  
Outer Cylinder ◽  
Wave Structure ◽  
Cylindrical Structure ◽  
Water Particle ◽  
Design Charts ◽  
Outer Cover ◽  
Force Reduction ◽  
Water Particle Kinematics ◽  
Existing Structure ◽  
Wave Structure Interaction

While retrofitting and rehabilitation are usually related to strengthening of members, the presented concept is a novel attempt as it addresses decrease in the encountered forces on the members. Presence of perforated members in ocean structures reduces the wave-structure interaction significantly; breakwaters with perforated members are classical examples of such kind. This concept of encompassing the perforated outer cylinder with inner existing structure is found to be most feasible rehabilitation concept as it does not demand replacement of any damaged members. The presence of outer perforated cover alters the water particle kinematics significantly and eventually this remains the reason for the force reduction mechanism. In this study, the variation of water particle kinematics along the depth of the cylinder is estimated on the cylindrical structure with and without perforated outer cover. Forces on the inner cylinder are quantified numerically and experimentally; experimental results show a close agreement with that of the numerical ones. Velocity variations along the water depth are quantified in the form of design charts, which shall be helpful for the practicing professionals while attempting for retrofitting or re-design. Force variations derived through numerical analyses, which are functions of the water particle kinematics along the depth shall be useful in the design offices for cylindrical members encompassed with perforated outer cover. Introduction of perforated member over the existing cylindrical structure showed a significant force reduction around 60% on an average for all the wave steepness indexes considered for the study, when compared to the force on the member without perforated cover.

scholarly journals MICROMORPHOLOGY OF TEGUMENT OF EURYTREMA PANCREATICUM BEFORE AND AFTER ANTHELMINTICS

2021 ◽  
pp. 85-90
Author(s):  
Bibik ◽  
Nacheva ◽  
Nesterok
Keyword(s):  
Outer Part ◽  
Expert Assessment ◽  
Control Group ◽  
Comparative Effect ◽  
Comparative Aspect ◽  
Before And After ◽  
After Effect ◽  
Outer Cover ◽  
The One

The article describes micromorphological features of the tegument of the trematode of the species Eurytrema pancreaticum (Janson, 1899), Loos, 1907, family Dicrocoelliidae Odhner, 1911. The parasites were collected by dissection of spontaneously infected animals (cattle) with Eurytrema and with formed chronic eurythrematosis. Some of the trematodes were collected from the control group of animals, and some after deworming with anthelmintics. Using histological methods in a comparative aspect with the control, changes in the morphological features of the tegument of Eurytrema after effect of hexachloroparaxylol and oxinid were shown. It has been established that the toxic effect of anthelmintics causes destruction of the tegument. This increases the permeability of the drug and its metabolites through the outer cover of the trematodes into their body. There is a complete atrophy of the outer part of the tegument, and in the inner part of the tegument there is a decrease in the number of degenerative cells with hexachloroparaxylol and their increase with oxinid. The comparative effect by two anthelmintics of the old generation on the tegument is described to emphasize the effectiveness of their use in trematodiases, on the one hand, and to show the quality of histological methods in the expert assessment of drugs, on the other.

The Materials and Technologies Used in the Process of Developing a Rotary Module with an Unlimited Degree Rotation

2020 ◽  
Vol 994 ◽  
pp. 288-295
Author(s):  
Lukáš Hrivniak ◽  
Michal Šašala ◽  
Jozef Svetlík ◽  
Tomáš Stejskal
Keyword(s):  
Development Process ◽  
First Generation ◽  
Additive Technology ◽  
Mechanical Parts ◽  
Production Processes ◽  
Metal Machining ◽  
Outer Cover ◽  
Functional Prototype ◽  
The Right ◽  
Design And Manufacture

The article deals with the process of the development of components, selection and use of materials required to assemble an universal rotation module. The use of the right materials and production processes is an important factor in the development of any new machines. The paper first describes the function of the universal rotation module. Furthermore, it focuses on the development process of selected parts of the prototype, especially the outer cover of the module as well as other important parts. The main problem is to correctly design and manufacture the module so that the engine and other mechanical parts can be placed inside. The technologies that were used in the development of the rotary module are metal machining and plastic printing by additive technology. It also deals with materials that were used in the production of the first generation of the functional prototype and in the development and testing in the pre-production phase.

scholarly journals Estimation of Thermal Performance and Heat Loss in Plastic Greenhouses with and without Thermal Curtains

Energies ◽  
2018 ◽  
Vol 11 (3) ◽  
pp. 578 ◽  
Author(s):  
Hyung-Kweon Kim ◽  
Geum-Choon Kang ◽  
Jong-Pil Moon ◽  
Tae-Seok Lee ◽  
Sung-Sik Oh
Keyword(s):  
Surface Temperature ◽  
Energy Savings ◽  
Transfer Coefficients ◽  
Temperature Changes ◽  
Heat Transfer Coefficients ◽  
U Value ◽  
Outer Cover ◽  
Heating Energy Consumption ◽  
Insulation Performance ◽  
Indoor And Outdoor

Greenhouses are important for stable food production, but require large amounts of energy to maintain their microclimate in regions with harsh climates. This study assessed the internal thermal insulation performance of thermal curtains in double-layered plastic greenhouses in Korea in winter using cover surface temperature changes and heat transfer coefficients (U values). The thermal curtain performance increased as the temperatures of the inner cover surface increased and the outer cover surface decreased. The outer cover surface temperature with thermal curtains was almost uniformly 1.9 °C lower than that without thermal curtains, whereas the inner cover surface temperature was higher, demonstrating the warming effect of thermal curtain use. Under a constant indoor and outdoor air temperature difference, the daily average heating energy consumption was directly proportional to the U value. The U values were 2.76 W m−2 °C−1 with thermal curtains and 3.85 W m−2 °C−1 without thermal curtains. In double-layered plastic greenhouses that were covered with 0.1-mm-thick polyethylene, incorporating thermal curtains at night resulted in energy savings of about 28.7%, which was related to the decrease in U values. Installing and using thermal curtains at night in winter is a highly economical method for heating savings. These results can be used to promote energy savings in greenhouses in harsh climates.

Outer Cover Damages on Flexible Pipes: Corrosion and Integrity Challenges

2014 ◽  
Author(s):  
Morten Eriksen ◽  
Knut Inge Engelbreth
Keyword(s):  
Early Detection ◽  
Pipe Wall ◽  
Confined Water ◽  
Integrity Assessment ◽  
Corrosion Rates ◽  
Flexible Pipes ◽  
Hole Configuration ◽  
Outer Cover ◽  
Service Conditions ◽  
Reliable Methods

According to published statistics for flexible pipes, penetrating holes in outside covers of flexible pipes is one of the most frequent damage mechanisms. The corrosion and fatigue performances of tensile and pressure armour wires are directly influenced by the fluids in the pipe wall annulus. There are several incidents where cover damages have led to serious pipe failures. In this perspective the best strategy is to avoid cover damage, but for those cases where damage occurs it is essential to have systems in place for early detection, as well as capabilities for repair. Holes in the outside cover can create a range of different conditions in an annulus depending on location of the hole, configuration of the pipe and service conditions. CO2 driven corrosion in a confined water filled annulus has been investigated extensively and reported by several authors to give very low corrosion rates. However, the environments that armour wires are exposed to in certain parts of an annulus may differ significantly from confined water with CO2. One obvious example is the region around a penetrating hole in the outer cover where there may be repeated ingress of oxygenated seawater or air that mix with CO2 in the annulus. Such environments could cause high corrosion rates that may explain some observed failures. In many cases it is difficult to quantify the annulus environments precisely and suitable corrosion models have not been established. The consequences are large uncertainties in the prediction of corrosion type and rate, giving challenges for integrity assessment. This paper will identify and discuss unresolved corrosion issues related to outer cover damage linking it to field experience. Needs for developing further knowledge and models will be addressed. Efficient and reliable methods for repair of outer cover damage that can be mobilized soon are essential for restoring the integrity of pipes with damages to outer covers.

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