7,142 research outputs found
Continuous cultures of Mannheimia succiniciproducens MBEL55E for the production of succinic acid from various carbon substrates
No full textDocument classification with unsupervised nonnegative matrix factorization and supervised percetron learning
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No full textIndividually based birth and death dates, with early life experiences for elephants in Amboseli Kenya. These are stripped down data; users requiring more information should contact P.C. Lee at [email protected] based birth and death dates, with early life experiences for elephants in Amboseli Kenya. These are stripped down data. This is an Excel spreadsheet. Excel file. Blanks = missing information. -1 = Living (2020)
Nonnegative Matrix Factorization (NMF) based supervised feature selection and adaptation
No full textInterview With P.C. Hodgell
No full textP.C. Hodgell, author of God Stalk and Dark of the Moon, was one of the many authors who attended Mythcon XIX in Berkeley last summer. She was good enough to meet with the Mythic Circle writers\u27 roundtable and share some of her experiences with us. The following is transcribed from a low-quality tape; when it was possible to recognize a speaker’s voice I have identified them - others are noted as ct. Hope you enjoy it
Reduction of interchannel interference noise in a two-channel grating-based OCDMA system using a nonlinear optical loop mirror
No full textWe show that a nonlinear optical switch can be used to suppress the interchannel noise generated under multiuser operation within a coherent, direct-sequence optical code-division multiple-access (OCDMA) system. By incorporating a simple nonlinear optical loop mirror (NOLM) within the receiver, we demonstrate a 3.6-dB power penalty reduction in a two-channel 1.25-Gb/s 64-chip 160-Gchip/s grating-based direct-sequence OCDMA system. Even greater improvements in system performance were obtained at a data rate of 2.5 Gb/s, where the noise due to the overlap of adjacent decoded data bits also needs to be suppressed. In both instances, the system performance under two-channel operation with nonlinear filtering was shown to be comparable to that achieved under single-channel operation using the conventional matched-filter approach
A grating-based OCDMA coding:decoding system incorporating a nonlinear optical loop mirror for improved code recognition and noise reduction
No full textWe demonstrate an elementary grating-based optical code division multiple access (OCDMA) code generation and recognition system incorporating a nonlinear optical loop mirror (NOLM) within the receiver. We show that the NOLM can act as a nonlinear processing element capable of reducing both the pedestal associated with conventional matched filtering and the width of the associated code-recognition pulse. The pedestal rejection allows for an improved code recognition signal-to-noise ratio (SNR) relative to simple matched filtering alone, and reduced intra- and interchannel interference noise due to code overlap. The system benefits of using the NOLM are experimentally demonstrated under both single- and multiuser operation within a variety of seven- and 63-chip 160-Gchip/s code generation, recognition, and transmission experiments based on the use of bipolar superstructure fiber Bragg grating (SSFBG) coding-decoding pairs. Incorporation of the NOLM is shown to allow error-free penalty-free operation at data rates as high as 2.5 Gb/s under single-user operation, and to provide error-free performance with reduced power penalty in two-user experiments. The narrowed pulse recognition signature offers major advantages in terms of the further all-optical processing of decoded signals, such as code regeneration and recodin
Webber & Lee calf scan data
No full textObservational data collected on wild and captive elephant calves during development and used to compare percentage of time spent in play between calves of different ages, sex and wild vs captive conditions. These data have been collected over a long period and are presented as percentage of scans of behaviour.all SCANS.xlsx - Data presented as percentage of scans for elephant calf activities, associated with calf ID, age, sex, locatio
Fermentative production of succinic acid from glucose and corn steep liquor by Anaerobiospirillum succiniciproducens
No full textAnaerobiospirillum succiniciproducens requires expensive complex nitrogen sources such as yeast extract and polypeptone for its growth and succinic acid production. It was found that A. succiniciproducens was able to grow in a minimal medium containing glucose when supplemented with corn steep liquor (CSL) as the sole complex nitrogen source. The concentration of CSL had a significant effect on the glucose consumption by A. succiniciproducens. When 10-15 g/L of CSL was supplemented, cells were grown to an OD660 of 3.5 and produced 17.8 g/L succinic acid with 20 g/L glucose. These results are similar to those obtained by supplementing yeast extract and polypeptone, thereby suggesting that succinic acid can be produced more economically using glucose and CSL.This work was supported by the
Korean Ministry of Science and Technology and by the
Brain Korea 21 project
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