1976 ◽  
Vol 98 (4) ◽  
pp. 1166-1169
Author(s):  
A. J. Edmondson

An analysis is presented of a reeving arrangement suitable for the hoisting of critical materials requiring fail-safe criteria. The system consists of two independent wire ropes symmetrically threaded through the crown and lower blocks and reeved by a single takeup drum. The analysis provides for the load in each line of the wire rope remaining after failure of one rope occurs. The motion of the lower block and load are also provided for the variety of failure conditions considered. The analysis is useful to predict the effect of various design parameters on the integrity of system in the event of a single component failure.


1987 ◽  
Vol 24 (1) ◽  
pp. 163-168 ◽  
Author(s):  
E. Karl Sauer ◽  
E. A. Christiansen

The lower block of the Denholm landslide has moved 370 m over alluvium deposited by the North Saskatchewan spillway and river during the last 11 500 years at an average rate of 32 mm/year. These values must be considered minimal because erosion of the toe of the landslide is required for the formation of retrogressive landslides. The shear strength for the bedrock clay (shale) of the Lea Park Formation was back calculated to be [Formula: see text] assuming zero cohesion. Key words: retrogressive landslide, clay shale, residual strength, movement rates, geological age, inclinometer.


1999 ◽  
Vol 39 (1-3) ◽  
pp. 97-120 ◽  
Author(s):  
Penny L Padgett ◽  
Susan M Rimmer ◽  
John C Ferm ◽  
James C Hower ◽  
Cortland F Eble ◽  
...  
Keyword(s):  

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Rashid Abbasi ◽  
Lixiang Xu ◽  
Farhan Amin ◽  
Bin Luo

We proposed an innovative reversible data hiding technique that is formulated on histogram shifting by using multilayer localized n-bit truncation image (LBPTI), namely, generated form 8-bit plane by means of efficient lossless compression. After selecting the reference point from the block, the neighbor topmost points are used to attain the data embedding without modifying the peak point; in addition, the key information regarding peak point is not mandatory in extraction end to extract the secret information. In order to make the embedded cover-image similar to the histogram of original cover-image, we exploited the localization with efficient lossless compression on lower block level to increase the embedding capacity while controlling extra bit to expand additional embedding capacity on optimum level besides sustaining the quality of cover-image.


1976 ◽  
Vol 66 ◽  
pp. 1-14 ◽  
Author(s):  
A. N. Sherwin-White

There has been much debate about the nature and purpose of the Roman intervention in Pamphylia between 102 and 70 B.C., to which a new edge has been given by the discovery of the extensive new fragments of the ‘Piracy Law’ of 101–100. Any solution needs a clear understanding of the strategic geography of the region and its political role within the kingdom of Pergamum that became the province of Asia. This fertile though narrow coastal plain, hemmed in by the western prolongation of the Taurus mountains, between the high massif of Cilicia Aspera in the east and the lower block of Lycia in the west, with the Pisidian chains to the north, is the coastal face of the isolated and difficult country of Pisidia. The deltas of the Pisidian rivers, notably Cestros and Eurymedon, enrich the narrow plain of Pamphylia. Practicable access to the interior for large forces dependant on wheeled transport for supplies is provided by three difficult routes leading through the Pisidian mountains from the coastal harbours: the first goes north-west from Attaleia past Termessus into and through the mountainous Milyas region that lies behind Lycia to Cibyra, and thence to Laodicea on the upper Maeander (Lycus) in Carian Asia. The second and easiest goes northwards from Attaleia to Sagalassus in the heart of Pisidia, and thence to Apamea on the Phrygian plateau—with a difficult branch north-east to Pisidian Antioch and Philomelium—and the third goes north and north-east from Side through the highest section of the Pisidian mountains, passing between the great Lake Caralis and the northern end of the High Taurus into the elevated plateau of Lycaonia: thence, from the communication centre of Iconium, there is easy access to Cappadocia by the central highway that links Apamea, Iconium and Mazaca. Pamphylia thus forms the southern gateway to Pergamene and Roman Asia, and to the Cappadocian kingdom behind the main chains of the Taurus. Hence it was of strategic interest to the Hellenistic kingdoms, which in the past had sought to control it and to found cities in it, and most notably after the Treaty of Apamea, to the kings of Pergamum.


1991 ◽  
Vol 7 (2_suppl) ◽  
pp. 15-33 ◽  
Author(s):  
Klaus H. Jacob ◽  
Javier Pacheco ◽  
Guillermo Santana ◽  
Elizabeth Arscott

The earthquake of April 22, 1991 was located in the eastern foothills of the Cordillera de Talamanca in Valle de la Estrella with epicentral coordinates of 9°38.62′N and 84°5.92″W and a focal depth of 21.5 km (Figure 2-1). An analysis of the seismograms recorded at teleseismic distances indicates that the causative fault was a shallow-angle thrust fault striking in a southeast-northwest direction and dipping at less that 30° gently towards the southwest. The lower block moved in a westerly direction while uplifting the upper-block east coast of Costa Rica by 1 to 1.5 meters. The plane of this fault rupture may either have reached the surface some distance offshore, or, possibly, failed to reach the surface. Aftershock data are consistent with this interpretation.


2012 ◽  
Vol 198-199 ◽  
pp. 1632-1637
Author(s):  
Jie Zhao ◽  
Yong Li Zhao ◽  
Xiao Song Yu ◽  
Xin Bo Wang

Flexible Bandwidth Optical Networks(FBON) can improve spectrum usage rates comparing to traditional WDM networks, leaving one critical problem of spectrum fragments. This paper proposes a novel defragmentation scheme that determines the sequence of connections going through defragmentation processes. In sequencing connections, priority zones are divided and priority levels are set accordingly. Bandwidths or path lengths are what make a difference in a connection’s priority. As simulation results show, priority-based defragmentation scheme can achieve lower block rates as well as lower interruption rates. The simulation results also prove the preference of local defragmentation to global defragmentation and the preference of narrow-band defragmentation to broad-band defragmentation.


Author(s):  
Hiroshi Akahori ◽  
Sadahiko Okamura ◽  
Mitsugu Nishiura ◽  
Kenzo Uehira

A new model of freeze etching apparatus has been designed which enabled us to make both freeze fracture and freeze etching replicas of the biological specimens by easy simple procedures.This model is based on the principle of Bullivant's cold metal block method. It is composed of two-wedge-like brass blocks which are combined in a shape of rectangular prism with'a base 5.5 cm x 6. 0 era and a height of 7.5 cm.The lower block has a specimen stage to which a small specimen holder made of copper can be fixed. The specimen is put in a small hole of the specimen holder, and this holder is cooled in Freon 12.


Sign in / Sign up

Export Citation Format

Share Document