the symbian os architecture sourcebook design and evolution of a mobile phone os

... putNokia at the top of the sales league for PDAs, ahead of Palm, Compaq and Sharp. (The Communicator was classiﬁed by market analysts as a PDA, partly because it had a keyboard, but also partly because ... drafted a paragraphabout 2005 being a watershed year for Symbian OS, potentially itsbreakout year. Between then and now, as I write this at the end of 2006, the number of shipped Symbian OS phones ... 000.)As it happens, 1998, the year that Symbian was created, saw a temporary market reversal7but mobile phone uptake boomed againtowards the turn of the millennium.8 The PC and mobile phone...

The Design and Implementation of a Log-Structured File System

... view the log as the most up to date ‘‘truth’’ about the state of the data on disk. The main difference is thatdatabase systems do not use the log as the ﬁnal repositoryfor data: a separate data ... again. The bandwidth of each of the ﬁve phases isshown separately. Sprite LFS has a higher write bandwidth and the same read bandwidth as SunOS with the exception of sequen-tial reading of a ﬁle ... area is reserved for this purpose. The separate data area of these database systems meansthat they do not need the segment cleaning mechanisms of the Sprite LFS to reclaim log space. The space...

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Tài liệu The Design and Performance of a Real-time CORBA Event Service doc

... real-time applications. The pri-mary motivation for basing the internal architecture of the TAO Event Channel on the ACE Streams framework is to sup-port static and dynamic channel conﬁgurations. ... registration, location, and acti-vation; request demultiplexing; framing and error-handling;parameter marshalling and demarshalling; and operation dis-patching.Figure 1 illustrates the primary components ... its deadline will be met, based on the publishedparameters of each schedulable operation.One advantage of our approach is that operation invoca-tions only pay the overhead of the C++ virtual...

The Design and Implementation of a Sequence Database System * docx

... Management of Data, May 1994. [CS92] Rakesh Chandm and Arie Segev. Managing Temporal Financial Data in an Extensible Database. In Proceedings of the International Conference on Very Large ... Catalog Management: Each E-ADT can provide catalogs that maintain statistics and store schema information. Further, certain values may be named. Query Language: An E-ADT can provide a query ... object-relational database system Illustra [I11941 provides database support for time-series data along with relational data. A time-series is an ADT(Abstract Data Type) value implemented a& amp; a...

The Design and Implementation of a Java Virtual Machine on a Cluster of Workstations pptx

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Design and Implementation of a Three-Phase Induction Motor Control Scheme

... cage induction motor” and the “wound motor”. An explanation of the advantages and disadvantages of each is given. Essential concepts such as “synchronous speed”, “slip”, “torque” and the rated ... presents the fundamentals of the induction motor from a practical viewpoint. The small and large motor types are distinguished, where the typical electric and mechanical characteristics of each are ... definition of the hybrid car and its potential advantages are stated. The concept of the parallel hybrid car is presented. This is a car design that simultaneously utilizes both the combustion...

Design and Simulation of A CMOS-MEMS Accelerometer

... the ratio of parasitic capacitance and sensing capacitance can bemeasured, and the estimated value is calculated assuming a total sensing capacitance of 60fF. Parasiticcapacitance and mismatch ... signal paths have to overlap. The effec-tive total value of these parasitic capacitors is around 70fF, which is the same order as the total sensingcapacitance. Parasitic capacitance of diodes and ... Figure 2.9. The symmetric topology (Figure 2.9 (a) )has the advantages of simplicity and less parasitic capacitance along with the disadvantage that a cross-axisacceleration signal generates a common-mode...

Tài liệu Design And Simulation Of A Cmos-Mems Accelerometer doc

... 2.9 (a) )has the advantages of simplicity and less parasitic capacitance along with the disadvantage that a cross-axisacceleration signal generates a common-mode output. The common-centroid design ... Cd is about an order of magnitude larger than Cd_air, so approximately the totalgap capacitance is equal to the sum of Cm_air and Cd_air, which is close to the gap capacitance of homoge-Vs+Vs-ProofmassVm-Vm+AnchorRigid ... sensitivity can be obtained by increasing effective mass, and modulation voltage, or byreducing spring constant, ﬁnger gap, and the ratio of parasitic capacitance and sensing capacitance. Sincem, and...

Tài liệu Experiences in Design and Implementation of a High Performance Transport Protocol doc

... Efficiency and Fairness Characteristics•Takes 7.5 seconds to reach 90% of the link capacity, independent of BDP•Satisfies max-min fairness if all the flows have the same end-to-end link capacity–Otherwise, ... 1000ms Fairness and Friendliness50 TCP flows and 4 UDT flows between SARA and StarLightRealtime snapshot of the throughput The 4 UDT flows have similar performance and leave enough space ... Loss Processing•On high BDP networks, the number of lost packets can be very large during a loss event•Access to the loss information may take long time•Acknowledge may take several packets0...

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