This report describes a study that extends solutions for mathematical analyses of seepage berms presented in Investigation of Underseepage and Its Control, Lower Mississippi River Levees, Technical Memorandum 3-424, Vol 1, October 1956, US Army Engineer Waterways Experiment Station. A plot of the required seepage berm width, B, versus the ratio of the permeability of the berm to the top blanket, bar-K for various safety factors indicates B is very sensitive to bar-K for K - 1. When the uplift...
Topics: DTIC Archive, BARRON (REGINALD A) GUILFORD CT, *MATHEMATICAL ANALYSIS, *SEEPAGE, EROSION, LEVEES,...
The history of the Wilmington District is a record of engineering efforts to develop . water resources in North Carolina and a portion of south central Virginia. Although the district was not established until 1884, the Corps of Engineers has worked to improve navigation in this area's coastal regions and rivers for more than 160 years. In recent years, our role has grown to encompass river basin development as we built and managed dams and reservoirs. Our history traces the growing...
Topics: DTIC Archive, ARMY ENGINEER DISTRICT WILMINGTON NC, *ARMY CORPS OF ENGINEERS, *HISTORY, *MILITARY...
A synthetic sampling frequency has been developed utilizing a 25 kHz SERVO-channel CW signal and a predetermined frequency of choice to achieve the proper sampling frequency for quadrature demodulation. The required synthetic sampling frequency examined here is 4f and is compared with the actual pre-recorded 4f. Very favorable results are shown for signals which were envelope detected utilizing quadrature demodulation methods. This technique may be applied to produce any sampling frequency of...
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *FREQUENCY, *SIGNAL PROCESSING,...
In support of Canadian Forces remotely piloted vehicle and drone research requirements, the Defence Research Establishment Suffield (DRES) has acquired an in-house expertise in aerial targets, drones and remotely piloted vehicle design, development and testing. Overviews of current range capabilities and proposed range improvement programs are given with emphasis on telemetry and video tracking capabilities, and on laboratory structural and engine Past and ongoing research programs are also...
Topics: DTIC Archive, DEFENCE RESEARCH AND DEVELOPMENT SUFFIELD (CANADA), *DRONES, *REMOTELY PILOTED...
A Pascal program to compute McCabe's control flow complexity metric for FORTRAN modules is presented. McCabe's metric which is called the cyclomatic number gives the size of any basis set of control flow paths through a program module. McCabe's metric is a useful indicator of the level of difficulty required to test and maintain a program module.
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *COMPUTER PROGRAMS, *PASCAL...
An analytical formulation is presented for normal incident plane wave scattering from gratings of compliant tubes embedded in a viscoelastic layer immersed in fluid. Approximations to boundary conditions at the interfaces between the interstice and compliant elements 1 are modified by treating the interstice as a viscoelastic plate which has the material properties of the polymer matrix material. The compliant tubes are modeled as two structurally and acoustically coupled plates with end...
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *ASPECT RATIO, *ELASTOMERS, *PLANE...
Measurements were made of the free dielectric constant and the dielectric loss tangent of piezoelectric polyvinylidene. fluoride (PVDF) at frequencies between 1 kHz and 5 MHz and temperatures between -28 deg C and +51 deg C. Samples of nonvoided and voided PVDF were tested. The dielectric constant increases with increasing temperature and/or decreasing frequency, ranging from about 3 to 11 for the voided material and from about 4 to 14 for the nonvoided material. The dielectric loss tangent...
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *CAPACITANCE, *FLUORIDES,...
Piezoelectricity is defined as pressure electricity. It is a property of polarized PZT (lead-zirconate-titanate) ceramic rings. As the name suggests, electricity is developed when pressure is applied to the rings. The reverse is also true. When an electric field is applied, the ceramic rings deform physically. The ceramic rings used do not have piezoelectric properties in their original state, however, piezoelectric behavior is induced when the rings are poled. The polarized rings are used in...
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *CERAMIC MATERIALS, *ELECTRIC FIELDS,...
The story of the Corps of Engineers on the Mississippi River above St. Louis began shortly after the Louisiana Purchase in 1803 with the first tentative exploration by Major Stephen H. Long. Sporadic at first, the work of improving the channel of the Upper Mississippi became a permanent job in 1866 with the beginnings of the Rock Island District. This volume attempts to survey those early years of trial and experiment and provide a more detailed account of the growth and development of the Rock...
Topics: DTIC Archive, ARMY ENGINEER DISTRICT ROCK ISLAND IL, *ARMY CORPS OF ENGINEERS, *HISTORY, *MARINE...
Established on March 15, 1886, the Louisville District of the Corps of Engineers, United States Army, in 1983 had a dual mission: supporting the armed services for national defense and directing a broad water resource development program mandated by Congress. For the Army and Air Force it managed real estate, provided engineering services, performed construction, and prepared for military mobilization in five states: Kentucky, Indiana, Ohio, Illinois, and Michigan. As directed by Congress, it...
Topics: DTIC Archive, CORPS OF ENGINEERS LOUISVILLE KY LOUISVILLE DISTRICT, *FLOOD CONTROL, *HISTORY, *OHIO...
The eruption of Mount St. Helens, which began in the spring of 1980, resulted in the movement of sediment creating a threat of flooding and navigation disruption in southwestern Washington. President Reagan recognized that the Federal Government was spending millions of dollars for emergency action and would continue responding to any emergency which threatened life and property. Thus he requested, through a Memorandum to the Secretary of Defense, that the Corps of Engineers prepare alternative...
Topics: DTIC Archive, ARMY ENGINEER DISTRICT PORTLAND OR, *CRISIS MANAGEMENT, *ENVIRONMENTAL IMPACT...
In late 1983, the Concept Development Directorate (CDD) at the Combined Arms Center queried the Combat Studies Institute (CSl) on the subject of larger unit operations. In response, CSI agreed to prepare a three-part study on larger units of which this annotated bibliography is a part. A search of primary and secondary source material in the Combined Arms Research Library (CARL) produced a substantial holding of subject-related material. A follow-up search of the holdings of the Military...
Topics: DTIC Archive, ARMY COMMAND AND GENERAL STAFF COLLEGE FORT LEAVENWORTH KS COMBAT STUDIES INST,...
The intentions of the ACSAS Project with regard to the tethered acoustic tests at Pend Oreille (Idaho) during the summer of 1984 are outlined. Identical measurements to be made on two different arrays installed on KAMLOOPS (ALT I and ALT III) are described. A somewhat different set of measurements to be made on a third array (ALT IV), later installed on the same quarter-scale model are described in an Addendum.
Topics: DTIC Archive, NAVAL FACILITIES ENGINEERING COMMAND WASHINGTON DC NUCLEAR POWER DIV, *ACOUSTICS,...
Seven major production programs currently being used at NUSC were selected to be run on the NASA-Ames CRAY-XMP computer. The results of this study will be described herein. In order to study the computational speed of a CRAY-XMP computer, seven major NUSC production programs were selected to be run on the NASA-Ames CRAY-XMP computer. Three of these programs were successfully converted and run on the CRAY-XMP computer. The remaining four programs were found to require many changes in order to...
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *COMPUTATIONS, *COMPUTERS, CONVERSION,...
The mean and variance of the product of the narrowband responses of two arrays steered to the same look direction is evaluated and shown to depend on the complex coherence between the two array outputs. For a cross-line array of perpendicular equi-spaced elements, the stability is much poorer than for a sum array processor, due to the largely uncommon volume of intersection of the two cones of response of each line. When each array is extended to be planar, the degradation in stability is...
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *ANALYSIS OF VARIANCE, *ARRAYS, *MEAN,...
This Memorandum describes the manner in which a procedure (and software) for utilizing a numerically controlled point to point milling machine as a 2-axis contour milling machine was developed, demonstrated and implemented on CAEDOS. A point to point milling and drilling machine will move its table from one point to precisely another point, however, unless this is a straight X or Y axis move, it will not travel a straight line to get there. By contrast, a contour milling machine will move its...
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *MILLING MACHINES, ALGORITHMS, CODING,...
Intersensor cross-correlation can be significantly affected by acoustic multipath. An analytic model has been developed to simulate band-1imited cross-correlation for an environment in which the propagation is represented as four first-order bottom bounce rays. The four path model is intended to be an aid in understanding how cross-correlation is affected by bottom bounce conditions. This memorandum describes the geometry and assumptions of the analytic four path model, presents the supporting...
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *ACOUSTICS, *BOTTOM BOUNCE, *SONAR,...
Acoustic pressure pattern due to a vibrating axisymmetric body in a semi-infinite fluid medium is calculated using the results of FIST program in conjunction with the method of images developed in the analysis. Far field and near field acoustic pressure patterns are calculated for a cylindrical transducer vibrating in a semi-infinite fluid medium. The method of images is developed to calculate the acoustic pressure in .semi-infinite fluid using the results ot FIST program. FIST program...
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *TRANSDUCERS, ACOUSTIC WAVES,...
This memorandum discusses the development of the XU1643U transducer which is replacing the XU1643 transducer for use as an omnidirectional projector on active submarines and for research and ranging projects.
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *TRANSDUCERS, MODIFICATION,...
An algorithm has been developed for the detection and correction of surface ship launched expendable bathythermograph (XBT0 data that is manually implemented into the Sonar In-Situ Mode Assessment System (SIMAS) Reliability of the measured data is significantly improved over previous techniques used in SIMAS and, with slight modification, the algorithm can be adapted for use in totally automated surface ship performance prediction systems.
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *BATHYTHERMOGRAPHS, *DETECTION,...
A new approach is developed to reduce the computational complexity of a moving average Least Mean Square Fit (LMSF) procedure. For a long data window, a traditional batch approach would result in a large number of multiplication and add operations {i.e., an order N, where N is the window length\202. This memorandum shows that the moving average batch LMSF procedure could be made equivalent to a recursive process with identical filter memory length but at an order of reduction in computation...
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *COMPUTATIONS, *LEAST SQUARES METHOD,...
The one-dimensional roughness of an under-ice profile of elliptical bosses is modeled in the time domain by a shot noise process of elliptical pulses of random amplitude, duration, and time of occurrence. A sample realization of 8000 data points is generated and plotted for visual comparison with experimental under-ice data. Also, theoretical and simulation results for the power density spectrum, the autocorrelation function, the characteristic function, the cumulative distribution function,...
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *AMPLITUDE, *SHOT NOISE, *UNDERICE,...
A computer program was written for the HP 9845 and the HP 9816 to calculate the directivity index directly from the beam pattern. A graphics tablet and stylus is used to digitize data points used to compute the directivity index. Graphical output is produced on a printer and plotter. This program was developed to enable the user to digitally input beam pattern data points into a computer and calculate the directivity index from this data. It eliminates the slow and monotonous task of visually...
Topics: DTIC Archive, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *COMPUTER PROGRAMS, *COORDINATES,...
The Airlift Master Plan provided a clear alternative for structuring the future airlift fleet. The foundation of the plan is the C-17 aircraft. Under the Air Force alternative, at least 180 of these aircraft will be procured before the end of the century. The Air Force views this as a modernization alternative that will meet the intertheater airlift requirement while allowing them to streamline the current fleet. As an alternative to the Air Force plan, the Congress could choose to continue to...
Topics: DTIC Archive, CONGRESSIONAL BUDGET OFFICE (U S CONGRESS) WASHINGTON DC, *CARGO AIRCRAFT, *MILITARY...
Mr. Chairman, I appreciate the opportunity to testify today on the effects of defense spending on the economy. The United States is in the midst of a program of strengthening its military capabilities. The Congress has approved $264 billion in budget authority for the national defense function in fiscal year 1984. After adjustment for inflation, that represents an increase of about 40 percent over the 1980 level. The Administration has proposed further increases that, if enacted, would raise...
Topics: DTIC Archive, CONGRESSIONAL BUDGET OFFICE (U S CONGRESS) WASHINGTON DC, *ECONOMIC IMPACT, *MILITARY...
Construction of jetties in the marine environment can result in two distinct persistent impacts on marine communities. The jetty structure itself provides habitat space for the development of attached faunal and floral communities, including associated motile invertebrates. This development of a reef-like community is generally viewed as a positive impact of jetty construction (see CETN-V-6); whereas the second impact, community changes of the benthic infauna, may be less desirable.
Topics: DTIC Archive, ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
Increasing usage of coastal areas by man has often resulted in loss of wetland habitat due to construction, recreation, harbor and channel maintenance, and pollution. Among such displaced habitats are beds of submerged aquatic vegetation, or seagrass. Restoration of seagrass for sediment stabilization and habitat enhancement is now possible through application of recently developed low-cost planting methodology.
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
The 4.2 Berkeley Software Distribution of UNIX for the VAX has several problems that can severely affect the overall performance of the system. These problems were identified with kernel profiling and system tracing during day to day use. Once potential problem areas had been identified benchmark programs were devised to highlight the bottlenecks. These benchmarks verified that the problems existed and provided a metric against which to validate proposed solutions. This paper examines the...
Topics: DTIC Archive, CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES,...
Berkeley UNIX 4.2BSD is an operating system which provides alternative ways for processes to communicate with each other. User processes may choose, for example, intermachine communications media, protocols, addressing families, and styles of communication. In particular, user processes may use datagram or stream communication. In this paper we present a study of the impact that IPC mechanisms, as currently implemented in Berkeley UNIX 4.2BSD in Ethernet based environments, have, from the user...
Topics: DTIC Archive, CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES,...
Conventional programs have a single stream of execution. Distributed programs expand on this notion, having multiple streams of execution that interact with each other. This expansion increases the complexity of a program's behavior. Existing program monitors do not provide enough information to deal with all of the problems of a distributed computing environment. This paper is concerned with the development of a programming tool for Berkeley UNIX whose goal is to characterize the performance...
Topics: DTIC Archive, CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES,...
Retargetable compilers generate code using machine-independent algorithms guided by the results of an analysis of the target machine. The analysis may be performed either by the compiler writer or by a compiler phase construction program. An implementation must be found for each operation of the source language. Additional analysis may reveal special features of the target architecture that may be exploited to generate efficient code. Such analysis is optional; it affects only the quality of...
Topics: DTIC Archive, CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES,...
The Berkeley Unix operating system is evolving into a more distributed computing environment. As such, applications written for it will increasingly consist of programs that spawn several processes, processes which may reside on more than one machine. A distributed system must provide facilities through which the processes that are part of such distributed computations can be controlled. There must be a way of terminating these processes, suspending their execution, restarting them, and...
Topics: DTIC Archive, CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES,...
Writing and debugging distributed programs can be difficult. When a program is working, it may be difficult to achieve reasonable execution performance. A major cause of these difficulties is a lack of tools for the programmer. We use a model of distributed computation and measurement to implement a program monitoring system for programs running on the Berkeley UNIX 4.2BSD operating system. The model of distributed computation describes the activities of the processes within a distributed...
Topics: DTIC Archive, VIRGINIA UNIV CHARLOTTESVILLE DIV OF ELECTRICAL ENGINEERING, *DISTRIBUTED COMPUTING,...
One of the fundamental problems in clustering is its validation. This issue has been addressed by many researchers in different ways depending on the methods they use to solve the clustering problem, nevertheless the existing approaches are based on the introduction of a validity function which is intented to measure the validity of the clustering obtained by the different methods. In our work we first address this issue and we give a new definition of fuzzy r-cluster that extend Ruspini's...
Topics: DTIC Archive, CALIFORNIA UNIV BERKELEY COMPUTER SCIENCE DIV, *CLUSTERING, *VALIDATION, FUZZY SETS
The Circus replicated procedure call facility for Berkeley UNIX is described. The main components of the system are a paired message protocol, a runtime library implementing replicated procedure call semantics, a binding service for replicated modules, and a stub compiler for the C programming language. The implementation of each of these components is discussed.
Topics: DTIC Archive, CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES,...
We show that if there exists a deterministic oracle that can determine the sum of the bits in the binary representation of x when presented with the RSA encryption of x, then there exists a probabilistic algorithm using this oracle to recover x when presented with the RSA encryption of x. We present a similar result for Rabin encryption.
Topics: DTIC Archive, CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES,...
Name servers are system processes that maintain databases of information about objects existing in computer networks, and answer user queries concerning them. Naming services are becoming increasingly important as computers are connected into networks and eventually into internetworks. This report describes our design and implementation of the DARPA Internet name servers in the Berkeley Unix environment. The naming service and the information it provides are both distributed and replicated user...
Topics: DTIC Archive, CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES,...
The requests for comment 881, 882, and 883 issued by the Information Sciences Institute address specific and impending needs of the ARPA/DDN internet community for distributed name services. The realization of such services at Berkeley is called the Berkeley Internet Name Domain (BIND). This report describes an implementation of the portion of BIND called the resolver. The resolver is a local agent which is responsible for retrieving information on behalf of the user. Thus, the user interface,...
Topics: DTIC Archive, CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES,...
A name server maps names to network addresses. It needs to maintain only a small amount of data to accomplish this feat. A special purpose database of simple design can provide much better performance than a general purpose database. This paper describes such an implementation.
Topics: DTIC Archive, CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES, *DATA...
A widely used class of binary trees is studied in order to provide information useful in evaluating algorithms based on this storage structure. A closed form counting formula for the number of binary trees with n nodes and height k is developed and restated as a recursion more useful computationally . A generating function for the number of nodes given height is developed and used to find the asymptotic distribution of binary trees. An asymptotic probability distribution for height given the...
Topics: DTIC Archive, NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OPERATIONS RESEARCH, *TOPOLOGY,...
Waveform Relaxation (WR) algorithms have been proven to be effective in the transient analysis of large scale integrated circuits. A new waveform relaxation simulator for MOS digital circuits, RELAX2, is described. Several speedup techniques included in RELAX2, such as adjusting the length of the inteval of simulation, using simpler models in the first few iterations, and allowing looser timestep control in the first few iterations, are also presented.
Topics: DTIC Archive, CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES,...
There are several important dialects of the LISP programming language, namely, Interlisp, Franz Lisp, Zeta Lisp, Common Lisp, Portable Standard LISP (PSL), Cambridge Lisp, and Lisp 370. Programs implemented in one dialect are usually not directly transportable to another. The PORTARE program was developed to automatically translate programs from one LISP dialect to another and to support their execution in the target system. It features a pattern-directed translator coupled with a scheme for...
Topics: DTIC Archive, RAND CORP SANTA MONICA CA, *MACHINE TRANSLATION, *PROGRAMMING LANGUAGES, COMPUTER...
Readiness and sustainability issues are assuming an ever greater importance in defense planning and budgeting. Dealing with these issues requires the development of new methodologies for examining the relationship of resources to readiness and sustainability. This study is intended to contribute to a better understanding of that relationship and to the broader questions of readiness and sustainability confronting the Department of Defense. It is not intended as a cost-effectiveness study...
Topics: DTIC Archive, RAND CORP SANTA MONICA CA, *COMPUTER PROGRAMS, *MATERIEL, *RESOURCE MANAGEMENT,...
In the Kremlin's public view, one of the main activities of the Party is its leadership of the economy. The Party not only determines rules and plans for production but also continuously influences daily economic activities down to the smallest economic units. The Party's all-encompassing participation in economic activities is, of course, alleged by the Kremlin to be a necessary or even a sufficient condition of economic success. Economic success or failure at various levels is said to be...
Topics: DTIC Archive, RAND CORP SANTA MONICA CA, *ECONOMIC DEVELOPMENT, *LEADERSHIP, *MANAGEMENT, *USSR,...
A complete, unified description is given of the design, implementation and use of a family of very fast and efficient large-scale minimum-cost (primal simplex) network programs. The class of capacitated generalized transshipment problems solved includes the capacitated and uncapacitated generalized transportation problems and the continuous generalized assignment problem, as well as the pure network flow models which are specializations of these problems. These formulations are used for a large...
Topics: DTIC Archive, NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OPERATIONS RESEARCH, *NETWORK FLOWS,...
With the support of the Information Processing Techniques Office of the Defense Advanced Research Projects Agency, Rand has studied the issue of adapting new technology in the field of artificial intelligence to the problem of Air Force tactical planning. The study focused on the possibility of using the tools and techniques of knowledge engineering to construct an intelligent assistant expert system for tactical air targeting. This report describes a prototype version of such an expert system:...
Topics: DTIC Archive, RAND CORP SANTA MONICA CA, *EXPERT SYSTEMS, *PROTOTYPES, *TACTICAL WARFARE,...
Methods of text compression in Navy messages are not limited to sentence fragments and the omissions of function words such as the copula be. Text compression is also exhibited within grammatical sentences and is identified within noun phrases in Navy messages. Mechanisms of text compression include increased frequency of complex noun sequences and also increased usage of nominalizations. Semantic relationships among elements of a complex noun sequence can be used to derive a correct bracketing...
Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC NAVY CENTER FOR APPLIED RESEARCH IN ARTIFICIAL...
Monitoring coastal projects usually involves repeated surveys of coastal structures and/or beach profiles. When a coastal structure such as a jetty is protected with concrete armor units or quarrystone, monitoring the movement of individual units may be difficult, if not impossible, by conventional survey methods. Photogrammetric techniques, however, can be used to get precise measurements from properly acquired aerial photographs. When the structure is photographed at low tide, an accurate,...
Topics: DTIC Archive, COASTAL ENGINEERING RESEARCH CENTER VICKSBURG MS, *MONITORING, *PHOTOGRAMMETRY,...
Timber piling can suffer severely from ice damage. As ice forms on the water's surface, it adheres to the rough surface of the timber piling and forms an ice collar. As more ice forms and thickens and the water level changes due to tides, the ice tries to float up and down, exerting an uplift force on the piling. When the action is repeated, the piling is lifted higher (or jacked) and may be completely loosened from the bottom. If the piling is not lifted the first season, the chafing action of...
Topics: DTIC Archive, COASTAL ENGINEERING RESEARCH CENTER VICKSBURG MS, *PILE STRUCTURES, ICE FORMATION,...
0
0.0
Sep 17, 2018
09/18
Sep 17, 2018
by
Government of Haryana
texts
eye 0
favorite 0
comment 0
Haryana Gazette Gazette Type: Ordinary Date: 1984-12-30 Gazette Number: 1 Department: Revenue Notification Number: SE-PWD-B&R-Branch-Ambala-1351 Subject: The Land Acquisition Act 1894 Section 4 Source URL
Topic: Haryana Gazette
