49 research outputs found
Optimal Network Utility
ABSTRACT: The problem of scheduling for maximum throughput-utility in a network with random packet arrivals and time varying channel reliability, the network controller assesses the condition of its channels and selects a set of links for transmission. The success of each transmission depends on the collection of links selected and their corresponding reliabilities. The goal is to maximize a concave, non-decreasing function of the time, average through-put on each link. Such a function represents a utility function that acts as a measure of fairness for the achieved throughput vector
Report on the International Indian Ocean Expedition Collections of Cumacea in the Smithsonian Institution Washington
The studies on the Cumacea obtained by the International Indian Ocean Expedition deposited in the
Smithsonian Institution suggest that the Cumacean fauna along the east coast of Africa (Durban Bay,
Nossi-Be-Madagascar, Grand Comoro Island) is very rich. They show aflSnities with those of Australian
and Phillippine Coasts. Family Nannastacidae is widely distributed along the east coast of Africa, Malaya
Coast and Singapore Strait. It is also noted that most of them were obtained from shallow waters. Only
very few species are restricted to deeper regions. Campylaspts orientalis Caiman, C. rubincunda (Lilljeborg)
are distributed at 2125 m depth off Madagascar.
The specimens are mostly benthic and they are abundant in a fine sandy bottom with a small percentage
of silt and are rare in coarse and fine muddy deposits. Sometimes they occur in sand which
contains soft and hard corals, sponges and Sargassum. Nannastacus gibbosus is present in large numbers
at Palau Hantu (S. W. Singapore). The benthic collections from the Red Sea show that Schizotrema
aculeata prefers a sandy bottom in a very shallow depth. It is also noted that two species namely Nannastacus
longirostris and Cumella limicola which had been previously described from Mediterraenan Coasts
are widely distributed in the Nossi-Be-Madagascar area. Cumella limicola is known from west coast
of Africa also.
The ecological habitat of the Cumacean fauna of the east coast of Africa are essentially intertidal
rocks, large masses of compacted mud rocks, coral and rook patches on the hard sandy bottom with coral
reefs and mangroves. Leucon sp. and Hemilamprops sp. are quite common in the Durban Bay, while
Nannastacus sp. are observed from Nossi-Be-Madagascar areas and Singapore Coast
Structuring Factors Of The Cumacean Communities Of The Continental Shelf Of Southeastern Brazil
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Competitive and collaborative supply chains: the strategic role of product innovation, secondary markets and channel structure
textInnovation in product and process development is regarded as a key avenue
for growth, profitability, and competitive advantage in many industries.
With lifetimes of products shortened by both the accelerating pace of technological
change and global competition, firms are forced to invest continually
and ever-increasing amounts to maintain their competitive edge. However,
due to increasing complexity of offerings and intensifying competition, successful
development and distribution of products also depends on the strength
of a firm’s relationships with its partners. In this dissertation, we examine the
strategic interactions between a firm’s technological capabilities, its product offerings
and collaborative and competitive forces in supply chains. Specifically,
this dissertation examines three stages of a product development problem and
characterizes the role of product innovation, secondary markets and distribution
channels in determining the structure of inter-firm relationships. In the
first essay, we look at the different approaches that firms take while collaborating
with suppliers in new product development. Following the development
of a new product, a key decision for a firm is its product positioning strategy.
The second essay of the dissertation analyzes the product positioning problem
of a firm under both monopoly and competition. Secondary markets also
play a significant role in determining the nature of inter-firm relationships.
The final essay of the dissertation probes this issue further and examines the
strategic role of intermediaries upon the distribution strategy adopted by a
firm. In summary, this dissertation illustrates how product characteristics and
inter-firm relationships play a crucial role in the success or failure of firms.
Hence, it is important for firms to recognize these factors while making design,
development and distribution decisions.Managemen
Not Available
Not AvailableThe studies on the Cumacea obtained by the International Indian Ocean Expedition deposited in the
Smithsonian Institution suggest that the Cumacean fauna along the east coast of Africa (Durban Bay,
Nossi-Be-Madagascar, Grand Comoro Island) is very rich. They show aflSnities with those of Australian
and Phillippine Coasts. Family Nannastacidae is widely distributed along the east coast of Africa, Malaya
Coast and Singapore Strait. It is also noted that most of them were obtained from shallow waters. Only
very few species are restricted to deeper regions. Campylaspts orientalis Caiman, C. rubincunda (Lilljeborg)
are distributed at 2125 m depth off Madagascar.
The specimens are mostly benthic and they are abundant in a fine sandy bottom with a small percentage
of silt and are rare in coarse and fine muddy deposits. Sometimes they occur in sand which
contains soft and hard corals, sponges and Sargassum. Nannastacus gibbosus is present in large numbers
at Palau Hantu (S. W. Singapore). The benthic collections from the Red Sea show that Schizotrema
aculeata prefers a sandy bottom in a very shallow depth. It is also noted that two species namely Nannastacus
longirostris and Cumella limicola which had been previously described from Mediterraenan Coasts
are widely distributed in the Nossi-Be-Madagascar area. Cumella limicola is known from west coast
of Africa also.
The ecological habitat of the Cumacean fauna of the east coast of Africa are essentially intertidal
rocks, large masses of compacted mud rocks, coral and rook patches on the hard sandy bottom with coral
reefs and mangroves. Leucon sp. and Hemilamprops sp. are quite common in the Durban Bay, while
Nannastacus sp. are observed from Nossi-Be-Madagascar areas and Singapore Coast.Not Availabl
Cumacea from the North Sea
42-43Distribution of Cumacea in the North Sea plankton has been studied. Six species of Cumacea are identified from Hardy's
continuous plankton recorder and plankton indicator samples collected by the Oceanographic Laboratory, Edinburgh during
1952-1963. Pseudocuma longicornis is the most common and widely distributed. P. gilsoni is a new record for the North Sea
Though previous records show the presence of more species of Cumacea in the North Sea, the present studies reveal that atleast
one species - P. longicornis - is abundant in the South North Sea, with maximum during Aug.-Sept. in the coastal waters