Abstract: In a television image display apparatus, one field of an input video signal is divided into a plurality of areas in each of which image information is sampled, and an arithmetic processor provides a video control signal on the basis of preset adjusting data received from a memory and the sampled image information. Luminance, chrominance or sharpness levels can be automatically controlled for each field by such video control signal to maintain the video display in an optimum state. Noise problems typically associated with dark images or weak electric fields are eliminated, while improving the image quality by adjusting the video output for each field.

Abstract: The present invention relates to a method for producing InP single crystals containing impurities such as Fe, Co, Ti, Cr or the like by cutting the single crystals into wafers or blocks and heat-treating the cut wafers or blocks at temperatures ranging from 400.degree. C. to 690.degree. C. Further, the invention is related to a method for producing compound semiconductor devices employing Fe-doped InP single crystals as the substrate of the device. In this method, the InP single crystals are cut into wafers and the cut wafers are heat-treated at temperatures ranging from 400.degree. C. to 690.degree. C. Further, the wafers are implanted with ions and heat-treated at 690.degree. C. or lower to activate the implanted ions. These methods ensure to produce the single crystals and the compound semiconductor devices which have superior electrical properties.

Abstract: In a method of multi-color offset printing each of a plurality of blankets is contacted with respective printing plates corresponding to each color of the blankets to transfer their respective colors to each of the blankets. Then, each of the blankets is contacted with respective preceding printing plates whose colors are respectively printed prior to that of each of the blankets for transferring color ink of the respective preceding color printing plates to each of the blankets. Next, each of the blankets is pressed in the predetermined order onto a sheet of printing paper to transfer each color ink to the printing paper one after one another.

Abstract: A television receiver incorporating a video cassette recorder and having a display, for example, a picture screen, for showing a main-channel picture within which a sub-channel picture may be superimposed, includes first and second tuners which are independently controllable for each selecting one of a number of broadcast channels, with the video signal broadcast on the channel selected by the first tuner being supplied to the display for forming the main-channel picture while the video signal broadcast on the channel selected by the second tuner is supplied to the display for forming the sub-channel picture in a sub-channel picture display mode of the receiver, and a system controller is programmed so that, when initiating a recording mode of the video cassette recorder, the second tuner is made to select the same broadcast channel as the first tuner.

Abstract: A video source selecting system for a television receiver has a built-in video tape recorder (video deck) for sequentially selecting for display, a plurality of video signals on various channels, such video signals including at least a video signal from the built-in video deck, and a video signal from at least one external video input terminal. A selected video signal is supplied to a monitor television receiver. When the built-in video tape recorder is placed in its playback mode, the plurality of video signals are switched selected sequentially, while when the built-in video tape recorder is not placed in its playback mode, it is skipped by the switch, whereby the order in which the video signals are switched is in response to the operational state of the built-in video tape recorder.

Abstract: A video display system has a circuit for sequentially superimposing N (N.gtoreq.2) information signals upon a video signal for display on the picture screen of a television receiver, at predetermined positions in parallel relation, and a circuit for changing the display positions so as to display information signals sequentially from a corner of the picture screen.

Abstract: A picture display apparatus has respective modes in which it displays at least three different types of pictures in sequence in response to actuations of a single switch. The picture display apparatus may be incorporated within a conventional television receiver having a programmable timer, and in such case the first type of picture is the normal television picture, the second type of picture is a display of the current day of the week and current time, and the third type of picture is a display of programming information stored in the programmable timer. When the switch is actuated within a predetermined time from the occurrence of a characteristic event in the respective mode, the next type of picture in the sequence is displayed. When the switch is actuated after the predetermined time has elapsed, the first type of picture in the sequence is displayed.

Abstract: A vapor-deposited film of selenium as a photoreceptor for electrophotography contains not more than 50 parts per million of oxygen. In producing the film, the oxygen content in the starting material selenium is controlled so that the resulting film contains oxygen within the specified range. The original oxygen content is reduced by vacuum distillation of the material selenium in a high vacuum, reduced-pressure distillation in high purity hydrogen, or preservation of the selenium shot in vacuo or in an inert gas. The starting material is obtained by mixing or melting selenium with a predetermined amount of selenium dioxide, or by carrying out vacuum distillation either of selenium at a vacuum degree of about 10.sup.-2 torr and thereby converting part of the material selenium into selenium dioxide, or of a mixture of selenium and a predetermined amount of selenium dioxide. The vacuum degree during the vapor deposition is controlled so that the oxygen content in the resulting film is 50 ppm or less.

Abstract: A vapor-deposited film of selenium or selenium alloy as a photoreceptor for electrophotography comprises selenium or a selenium alloy and phosphorus contained therein in an amount of not less the 0.5 ppm and adjusted to attain a desired contrast potential. The selenium alloy is selected from Se-Te, Se-As, Se-Bi, and Se-Sb alloys. The film is produced either by adding phosphorus to stock selenium or selenium alloy and then vacuum-depositing the phosphorus-containing selenium or selenium alloy or by simultaneously vapor-depositing selenium or selenium alloy and elemental phosphorus or a phosphorus compound.

Abstract: A lambda type direct suspending overhead contact system for an electric railway including two or more pairs of anchor ears connected to a contact wire and outer and inner suspension wires held by a suspension clamp on a fixed beam at a ratio of a tensile of said outer suspension wire to a tensile of said inner suspension wire of 2.0 to 3.5:1.

Abstract: Prostanoic acid derivatives having the formula ##STR1## wherein A represents a straight or branched alkylene group having from one to 5 carbon atoms, R.sup.1 represents a straight or branched alkyl group having from 4 to 10 carbon atoms and R.sup.2 represents hydrogen atom or a straight or branched alkyl group having from one to 6 carbon atoms and pharmaceutically acceptable salts thereof.The compounds are useful as oxytocic agents and agents inhibiting the secretion of gastric acid and may be prepared by oxidizing a compound having the formula ##STR2## wherein A, R.sup.1 and R.sup.2 are the same as above, R.sup.3 and R.sup.4 are the same or different and each represents a protecting group for the hydroxyl group to give a compound having the formula ##STR3## wherein A, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are the same as above, removing the hydroxyl-protecting group from the latter compound and, if appropriate, salifying the product thus obtained.

Abstract: Prostanoic acid derivatives having the formula ##SPC1##Wherein A represents an alkylene group having from 4 to 8 carbon atoms, R.sup.1 represents an alkyl group having from 4 to 10 carbon atoms, R.sup.2 represents hydrogen atom or an alkyl group having from one to 6 carbon atoms and R.sup.3 represents hydrogen atom or an alkoxycarbonyl group having from one to 6 carbon atoms in the alkyl moiety and the pharmaceutically acceptable salts thereof and also relates to a process for the preparation thereof.The compounds are useful as oxytocic agents and may be prepared by reducing the compound having the formula ##SPC2##Wherein A, R.sup.1, R.sup.2 and R.sup.3 are the same as above and Z represents a carbonyl-protecting group with a metal hydride complex in the presence or absence of an inert organic solvent to give a compound having the formula ##SPC3##Wherein A, R.sup.1, R.sup.2, R.sup.3 and Z are the same as above and removing the carbonyl-protecting group of the latter compound.