Abstract: The present invention provides a compound useful as a synthetic intermediate for an anti-HIV agent having an integrase inhibitory activity, a production method thereof, and a production method of an anti-HIV agent using the synthetic intermediate. Specifically, the present invention provides, for example, compounds represented by the formulas (6), (7-1), (7-2) and (8): wherein R is a fluorine atom or a methoxy group, R1 is a C1-C4 alkyl group, R2 is a hydroxyl-protecting group, and X2 is a halogen atom, a production method thereof, and a production method of an anti-HIV agent using the synthetic intermediate.

Abstract: The present invention provides a compound useful as a synthetic intermediate for an anti-HIV agent having an integrase inhibitory activity, and a production method thereof, and a production method of an anti-HIV agent using the synthetic intermediate. Specifically, for example, a compound represented by the formula (2?): wherein R is a fluorine atom or a methoxy group, and R400 is a hydrogen atom or a C1-C4 alkyl group, or a salt thereof, and a production method thereof, and a production method of an anti-HIV agent using the synthetic intermediate.

Abstract: A moving picture sequence is divided into key frames, which are coded by a conventional method, and non-key frames, which are coded to obtain error-correcting information. The encoder and decoder independently generate predicted images for each non-key frame. The encoder compares its predicted image with the original non-key frame to estimate how much error-correcting information the decoder will need to decode the non-key frame by correcting prediction errors in the decoder's predicted image, and sends the decoder that amount of error-correcting information together with correlation information indicating how closely the predicted image and the original non-key frame are correlated. Before decoding the non-key frame, the decoder modifies the correlation information to compensate for differences in the prediction methods employed by the encoder and decoder. The modification enables the decoding process to converge faster.

Abstract: A video encoder apparatus using a distributed video coding (DVC) includes a Wyner-Ziv frame encoder for forming a predictive image of a Wyner-Ziv frame on the basis of coded key frames, and determining, according to the fallibility of the transform coefficients of the predictive image with respect to the transform coefficients of an original image based on the Wyner-Ziv frame, the amount of error correction codes to be transmitted so as to transmit the error correction codes corresponding to the determined amount. When no errors are found between the transform coefficients of the original image of the Wyner-Ziv frame and the predictive image, information indicating that no errors are found is sent out instead of the error correction codes for the Wyner-Ziv frame in question.

Abstract: A decoding system generates a predicted image, receives error correcting information encoding an original image, and uses the predicted image and the error correcting information to carry out a multi-stage decoding process that reconstructs the original image by correcting prediction errors in the predicted image. This process uses correlation information representing an assumed correlation between the predicted image and the original image. As the decoding process proceeds, the correlation information is updated to reflect assumed or inferred changes in the correlation between the predicted image and the original image. Updating the correlation information permits more efficient coding by enabling the original image to be reconstructed to an acceptable level of image quality with less error correcting information.

Abstract: A moving picture encoding apparatus divides a moving picture signal into key frames and non-key frames, encodes the key frames, predicts the non-key frames from the encoded key frames, determines an encoding rate for each non-key frame, encodes each non-key frame, and outputs an error-correcting code at the encoding rate as encoded data of the non-key frame. To determine the encoding rate, parameters related to the likelihood of prediction errors are calculated by at least two different methods for each non-key frame, the parameters are compared, one of the parameters is selected, and the encoding rate is calculated from the selected parameter. The selective use of differently calculated parameters enables an efficient encoding rate to be calculated for each non-key frame and reduces the transmission of encoded data that the decoder does not need or cannot decode.

Abstract: A moving picture encoding apparatus divides a moving picture signal into key frames and non-key frames, encodes the key frames, predicts the non-key frames from the encoded key frames, determines a final encoding rate for each non-key frame, encodes each non-key frame, and outputs an error-correcting code at the final encoding rate as encoded data of the non-key frame. To determine the final encoding rate, the number of error-correcting bits needed to correct prediction errors is estimated by a first method and one or more second methods. The second methods are used to decide whether to use the number of bits estimated by the first method as the final encoding rate, or whether to supplement the estimated number of bits by adding an encoding rate correction. As a result, the encoding rate is not supplemented unnecessarily and the encoding efficiency is improved.

Abstract: A video encoder apparatus using a distributed video coding (DVC) includes a Wyner-Ziv frame encoder for forming a predictive image of a Wyner-Ziv frame on the basis of coded key frames, and determining, according to the fallibility of the transform coefficients of the predictive image with respect to the transform coefficients of an original image based on the Wyner-Ziv frame, the amount of error correction codes to be transmitted so as to transmit the error correction codes corresponding to the determined amount. When no errors are found between the transform coefficients of the original image of the Wyner-Ziv frame and the predictive image, information indicating that no errors are found is sent out instead of the error correction codes for the Wyner-Ziv frame in question.

Abstract: A video sequence is encoded by encoding key frames to obtain coded data and non-key frames to obtain error-correcting information. In the encoding process, key frame data are stored in a buffer, first motion information pertaining to the key frames is obtained, and the first motion information is applied to the stored key frame data to generate predicted key frame data. Second motion information pertaining to the non-key frames is also obtained and used to generate predicted non-key frame data. Either the first motion information is obtained from the second motion information, or the second motion information is obtained from the first motion information. The encoder accordingly does not have to obtain motion information from the decoder, and can estimate the amount of error-correcting information to send to the decoder.

Abstract: A moving picture sequence is divided into key frames, which are coded by a conventional method, and non-key frames, which are coded to obtain error-correcting information. The encoder and decoder independently generate predicted images for each non-key frame. The encoder compares its predicted image with the original non-key frame to estimate how much error-correcting information the decoder will need to decode the non-key frame by correcting prediction errors in the decoder's predicted image, and sends the decoder that amount of error-correcting information together with correlation information indicating how closely the predicted image and the original non-key frame are correlated. Before decoding the non-key frame, the decoder modifies the correlation information to compensate for differences in the prediction methods employed by the encoder and decoder. The modification enables the decoding process to converge faster.

Abstract: The present invention provides a compound useful as a synthetic intermediate for an anti-HIV agent having an integrase inhibitory activity, a production method thereof, and a production method of an anti-HIV agent using the synthetic intermediate. Specifically, the present invention provides, for example, compounds represented by the formulas (6), (7-1), (7-2) and (8): wherein R is a fluorine atom or a methoxy group, R1 is a C1-C4 alkyl group, R2 is a hydroxyl-protecting group, and X2 is a halogen atom, a production method thereof, and a production method of an anti-HIV agent using the synthetic intermediate.

Abstract: An air conditioner includes a unit casing, an impeller, a scroll casing, and a heat exchanger. The unit casing is partitioned by a partition member into a fan chamber and a heat exchanger chamber. The heat exchanger is disposed inside the heat exchanger chamber so as to face a scroll blowout opening in the scroll casing. The scroll casing is disposed inside the fan chamber. A wall section projects from a heat exchanger side of a flat plate section of the partition member and is disposed outside a scroll outlet section of the scroll casing.

Abstract: A decoding system generates a predicted image, receives error correcting information encoding an original image, and uses the predicted image and the error correcting information to carry out a multi-stage decoding process that reconstructs the original image by correcting prediction errors in the predicted image. This process uses correlation information representing an assumed correlation between the predicted image and the original image. As the decoding process proceeds, the correlation information is updated to reflect assumed or inferred changes in the correlation between the predicted image and the original image. Updating the correlation information permits more efficient coding by enabling the original image to be reconstructed to an acceptable level of image quality with less error correcting information.

Abstract: A multi-blade centrifugal fan for preventing circular flows in the end portions of an impeller in the axial direction is provided in a simple structure. The multi-blade centrifugal fan is formed of a fan casing 1 of a scroll type and a multi-blade centrifugal impeller 2. The fan casing 1 has a bellmouth 4 which becomes an air intake. The multi-blade centrifugal impeller 2 has a number of annularly arranged blades 6 inside the fan casing 1. The centrifugal impeller 2 draws in air through the intake 7, which faces the bellmouth 4, and blows out the air in the centrifugal direction through the blades 6. A retainer ring 10 is provided in an outer peripheral end portion of the impeller 2. A cylindrical body 11 is integrally provided in such a manner as to extend from the outer end of the retainer ring 10, so that circular flows toward the intake side are prevented in the end portions of the impeller 2.

Abstract: The present invention provides a compound useful as a synthetic intermediate for an anti-HIV agent having an integrase inhibitory activity, and a production method thereof, and a production method of an anti-HIV agent using the synthetic intermediate. Specifically, for example, a compound represented by the formula (2?): wherein R is a fluorine atom or a methoxy group, and R400 is a hydrogen atom or a C1-C4 alkyl group, or a salt thereof, and a production method thereof, and a production method of an anti-HIV agent using the synthetic intermediate.

Abstract: To code the current frame of a moving picture, a weighting coefficient and the mean pixel values in the current frame and a reference frame are obtained. The weighting coefficient is used to modify the mean pixel value in the reference frame, and an offset value is calculated from the resulting modified mean pixel value and the mean pixel value in the current frame. Reference image blocks are then selected from the reference frame, and a predicted image block is generated by applying the weighting coefficient and the offset value to each selected reference image block. Because of the modification of the mean pixel value of the reference frame, pixel values in the predicted image blocks are distributed around the mean pixel value in the current frame, which leads to efficient coding.

Abstract: An air conditioner includes a unit casing, an impeller, a scroll casing, and a heat exchanger. The unit casing is partitioned by a partition member into a fan chamber and a heat exchanger chamber. The heat exchanger is disposed inside the heat exchanger chamber so as to face a scroll blowout opening in the scroll casing. The scroll casing is disposed inside the fan chamber. A wall section projects from a heat exchanger side of a flat plate section of the partition member and is disposed outside a scroll outlet section of the scroll casing.

Abstract: A multi-vane centrifugal fan has a fan housing and an impeller. The impeller includes a plurality of vanes arranged with a prescribed spacing in the circumferential direction and fixed to a hub rotatably driven around a shaft core. The impeller further includes an annular member for reinforcement that is provided on a side of the vanes opposite the hub. The fan housing has a bell mouth with a recessed part that is provided around a circumference of an air suction port of the fan housing. The recessed part has air suction port side end parts positioned on the side of the vanes opposite the hub and rotatably inserted in the recessed part without having a shroud.

Abstract: A multi-vane centrifugal fan has a fan housing and an impeller. The impeller includes a plurality of vanes arranged with a prescribed spacing in the circumferential direction and fixed to a hub rotatably driven around a shaft core. The impeller further includes an annular member for reinforcement that is provided on a side of the vanes opposite the hub. The fan housing has a bell mouth with a recessed part that is provided around a circumference of an air suction port of the fan housing. The recessed part has air suction port side end parts positioned on the side of the vanes opposite the hub and rotatably inserted in the recessed part, without having a shroud.

Abstract: The present invention eliminates the need to stop the operation of a line even when trouble arises before, during, or after an operation of joining metal blocks in hot rolling. According to a specific solving means of the present invention, when a succeeding metal block is to be subjected to hot finish rolling in succession to a preceding metal block after the leading end of the succeeding metal block is joined to a tail end 10B of the preceding metal block on the inlet side of a finish rolling mill 26, it is determined before and after joining whether or not endless rolling is impossible. When it is impossible, joining is aborted, and the succeeding metal block 12 is temporarily stopped, is fed again after the tail end 10B of the preceding metal block moves out of the finish rolling mill 26, and is finish-rolled under the conditions set for batch rolling.