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The borders of the Central High Atlas chain showed different structural styles, as revealed by the interpretation of recently acquired surface geology and sub-surface data. Structures, characterizing thick and thin skin tectonics, are variable from west to east and from south ...

Detailed field study of the east-margin blocks of the Suez rift indicates that rift initiation was marked by 22-24 Ma old volcanicity followed by second-order (relatively small) extensional faulting without block rotation. Slight rotation of first-order (large) rift blocks took place shortly before or during the deposition of the earliest rift sediments (Nukhul Formation). The shallow-water environment of deposition of the Nukhul Formation became deeper during the deposition of the overlying Rudeis Formation in response to rapid tectonic subsidence. A major event (mid-clysmic, 17 Ma ago) led to the rejuvenation of many faults bounding the large rift blocks, the development of several intra-block faults, and an abrupt change in the environment of deposition. At that time, tectonic deformation increased towards the rift axis where the width of the active part of the rift decreased. As a result of this mid-clysmic event, coarse elastics were deposited close to the major faults; later these deposits were faulted in a younger event. NW-NNW (clysmic) and N-NNE (transfer) faults are the two predominant normal fault sets in the east-margin blocks and link up in a characteristic zig-zag pattern. Block rotation is related to slip on NW-NNW listric faults. Fault plane slickenside lineations indicate predominant NE-SW extension as well as a subordinate E-W to ESE-WNW extension. The latter is perhaps related to post-Miocene mild deformation. Slip on the major faults of the rift is associated with drape folding and footwall deformation. Both lead to the development of rift-facing monoclines. The deformed parts of the footwall are spindle-shaped and link to the main faults via N-NNE transfer faults. Footwall deformation also results where a major fault bends out leaving a protrusion of the footwall. Rift extension is transferred beyond the rift boundary via some transfer faults and affects some parts of the shoulder.

Fifteen years of copy-editing experience – with theses (both in economics and in several medical fields), journal articles, book chapters and books, conference presentations, government reports, etc. – are distilled here. Papers are often sent to me for “language correction”, but what I usually find is that, far more than that, what they most need is major work on organization, writing, and formatting (including presentation of tables and figures). Even good writers can improve their writing by paying attention to the points herein, I believe. Of course digging deeply into issues of organization, writing, and even formatting improves readability (and thus the probability of being published, read, and cited), but it can also help to improve the quality of the thinking, i.e., the content of the paper. I first review the standard organization of most empirical papers in economics, with suggestions for improvement (including a brief discussion of some issues in reporting of statistical ...

Fifteen years of copy-editing experience – with theses (both in economics and in several medical fields), journal articles, book chapters and books, conference presentations, government reports, etc. – are distilled here. Papers are often sent to me for “language correction”, but what I usually find is that, far more than that, what they most need is major work on organization, writing, and formatting (including presentation of tables and figures). Even good writers can improve their writing by paying attention to the points herein, I believe. Of course digging deeply into issues of organization, writing, and even formatting improves readability (and thus the probability of being published, read, and cited), but it can also help to improve the quality of the thinking, i.e., the content of the paper. I first review the standard organization of most empirical papers in economics, with suggestions for improvement (including a brief discussion of some issues in reporting of statistical ...

The international standard IEEE 802.11 Wireless LAN protocol is a popular standard for wireless local area networks. Its medium access control layer (MAC) is a carrier sense multiple access with collision avoidance (CSMA/CA) design, although collisions cannot always be prevented, randomized exponential backoff rule is used in the retransmission scheme to minimize the likelihood of repeated collisions. To work around this problem, we identify state transition of the protocol that can be used to simplify the models and make verification feasible. This paper explains the state transition model of two way handshake mechanism of IEEE 802.11 standard for MAC DCF. Using these observations, a time variant generalized state transition model for channel, sender and destination station has been described. The proposed model has been validated using network simulator ns-2.

The invention is a microcomponent sheet architecture wherein macroscale unit processes are performed by microscale components. The sheet architecture may be a single laminate with a plurality of separate microcomponent sections or the sheet architecture may be a plurality of laminates with one or more microcomponent sections on each laminate. Each microcomponent or plurality of like microcomponents perform at least one chemical process unit operation. A first laminate having a plurality of like first microcomponents is combined with at least a second laminate having a plurality of like second microcomponents thereby combining at least two unit operations to achieve a system operation.

San Felipe Otlaltepec, una comunidad indigena Popoloca del estado de Puebla, organiza su territorio en secciones, una unidad territorial colonial. Esta organizacion es la base de la apropiacion del territorio urbano y de las tierras agricolas. Con entrevistas y fotografias aereas, se construyo un modelo de la conformacion original y actual de las viviendas de las secciones y de la apropiacion de la tierra, para su comparacion. Actualmente, se observa una mezcla de viviendas de diferentes secciones, que no corresponde al arreglo original de las mismas. Situacion similar se observo en la distribucion de las tierras agricolas. Estos cambios se deben principalmente a casamientos entre miembros de diferentes secciones, los cuales cambian la posesion de la tierra y la pertenencia a una seccion determinada. A pesar de la mezcla de viviendas de diferentes secciones, los entrevistados manifestaron un sentido profundo de pertenencia a la seccion a la que pertenecen formalmente.

A procedure is described for the time-frequency analysis of signals, based on time-frequency distributions (TFDs) and instantaneous frequency (IF) estimation. First, a suitable TFD is used to determine the number of signal components. Then, if the signal is monocomponent, the IF law can be estimated directly. For multicomponent signals, two-dimensional windowing in the time-frequency domain (a form of time-varying filtering) is used to isolate each component; IF estimation is then applied to the individual ...

A procedure is described for the time-frequency analysis of signals, based on time-frequency distributions (TFDs) and instantaneous frequency (IF) estimation. First, a suitable TFD is used to determine the number of signal components. Then, if the signal is monocomponent, the IF law can be estimated directly. For multicomponent signals, two-dimensional windowing in the time-frequency domain (a form of time-varying filtering) is used to isolate each component; IF estimation is then applied to the individual ...