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Papers by Time Connect

QoS requirements can be met without violating those of previously admitted connections. In hard r... more QoS requirements can be met without violating those of previously admitted connections. In hard real-time systems, the QoS requirements are specified in terms of end-to-end cell deadlines and no cell loss due to buffer overflow. A CAC algorithm must account f o r interdependencies among connections caused b y statzstical multiplexing of cells in A T M networks. Arbitrarity of network topology may lead to cyclic dependencies among various connections. W e present an eficient CAC algorithm that addresses the above issues. The algorithm uses a traffic descriptor called the maximum traffic rate function to effectively compute bounds on end-to-end delays of connections and buffer requirements within the network. Our work differs from most previous work in that it does not require traffic restoration inside the network. 2b.2.2

Computer Vision and Image Understanding, 2003

This paper presents a fast algorithm for labeling connected components in binary images based on ... more This paper presents a fast algorithm for labeling connected components in binary images based on sequential local operations. A one-dimensional table, which memorizes label equivalences, is used for uniting equivalent labels successively during the operations in forward and backward raster directions. The proposed algorithm has a desirable characteristic: the execution time is directly proportional to the number of pixels in connected components in an image. By comparative evaluations, it has been shown that the efficiency of the proposed algorithm is superior to those of the conventional algorithms.

Stratigraphic analysis of Late Quaternary sediments of the Sea of Marmara Basin (SMB) indicates t... more Stratigraphic analysis of Late Quaternary sediments of the Sea of Marmara Basin (SMB) indicates that it was a freshwater lake during the late glacial to ca 12,000 yr BP, depositing sediments with a Neoeuxinian fauna characteristic of the Black Sea Basin. At ca 12,000 yr BP, it was inundated by the Mediterranean waters and gradually converted into a marine realm as indicated by the presence above the Neoeuxinian sediments of a mixed layer, containing both marine and freshwater fauna. A sapropelic sediment layer was deposited between 10,600 and 6400 yr BP under suboxic bottom water conditions. This layer roughly corresponds in time to S1 sapropel unit of the eastern Mediterranean, suggesting a common origin. Its presence in the SMB, therefore, supports the hypothesis that a large influx of freshwaters from the Black Sea was an important factor in sapropel formation in the eastern Mediterranean. A second sapropelic layer formed in the SMB during 4750 to 3200 yr BP.

Multimedia Systems, 1997

Abstract. The ability to reserve real-time connections in ad-vance is essential in all distribute... more Abstract. The ability to reserve real-time connections in ad-vance is essential in all distributed multiparty applications (ie, applications involving multiple human beings) using a network that controls admissions to provide good qual-ity of service. This paper discusses the ...

Theoretical Computer Science, 2007

For a given graph G over n vertices, let OPT G denote the size of an optimal solution in G of a p... more For a given graph G over n vertices, let OPT G denote the size of an optimal solution in G of a particular minimization problem (e.g., the size of a minimum vertex cover). A randomized algorithm will be called an α-approximation algorithm with an additive error for this minimization problem, if for any given additive error parameter > 0 it computes a value OPT such that, with probability at least 2/3, it holds that OPT G ≤ OPT ≤ α · OPT G + n .

IEEE Transactions on Signal Processing, 1991

Queueing Systems - Theory and Applications, 2004

We consider a system where streaming and/or real time applications, using the UDP protocol pass t... more We consider a system where streaming and/or real time applications, using the UDP protocol pass through a bottleneck router. Several persistent and non persistent TCP connections may also be passing through that router. Using the rate control at the UDP sources and choosing the RED parameters appropriately, we obtain pre-specified delays, little delay jitter, no packet loss, 100% channel efficiency, pre-specified throughput for the TCP and UDP streams and little rate fluctuation. We verify our control scheme by extensive simulations. Results are extended to a tandem of queues.

Marine Geology, 2000

Advances in Water Resources, 2001

This paper investigates the scaling behaviour of annual¯ood peaks, exhibited through what is take... more This paper investigates the scaling behaviour of annual¯ood peaks, exhibited through what is taken to be a power law relationship between mean annual¯ood and catchment size, EQ p cA h . We also study the dependence on catchment size of the coecient of variation of annual¯ood peaks, CV Q p . We attempt to interpret these relationships in terms of the interactions between the land surface and the atmosphere ± in particular, the eects of temporal variability of rainfall (within-storm patterns, multiple storms and seasonality) and runo processes (overland¯ow, subsurface¯ow and channel¯ow). The spatial scaling of¯ood peaks, as expressed by the coecients c; h and CV, has been analysed based on, initially, simulated runo ®elds produced by a simple linear rainfall±runo model for hypothetical catchments, and later by a more realistic, distributed model for an actual catchment in the semi-arid, south-west of Western Australia. It is found that the main controls on c and h are runo processes, soil depth and mean annual rainfall, with additional controls on c including temporal rainfall variability, the underlying water balance, and the spatial variability of rainfall. Runo generation at catchment scales can be speci®ed as being fast or slow according to a relative catchment travel time. The scaling exponent h is high and almost constant with A for slow catchments, where deep soils combined with low annual rainfall leads to domination by subsurface¯ow. Conversely, h is lower in fast catchments, where shallow soils combined with high annual rainfall leads to dominance by surface runo processes with relatively short travel times. The interaction between within-storm patterns and fast runo processes is the important control on c, clearly shown in small catchments, while multiple storms and seasonality are crucial in large catchments. The presence of multiple runo processes with a broad spectrum of time scales leads to an increase of CV Q p , as does the introduction of spatial variability of rainfall. Ó

Annals of Surgery, 2001

To determine whether a low-bandwidth Internet connection can provide adequate image quality to su... more To determine whether a low-bandwidth Internet connection can provide adequate image quality to support remote realtime surgical consultation.