Abstract: In an optical wavelength converting method in which light from a laser oscillator that oscillates coherent light of an inherent wavelength &lgr; is employed as incident light, and is made to input to a nonlinear optical crystal, and light having a wavelength of ½ &lgr; is radiated, the wavelength of the incident light is 1000 nm or less, and the peak power density of the incident light is 0.1-10 fold greater than the peak power density that provides the maximum conversion efficiency. The nonlinear optical crystal is heated to and maintained at 200-600° C. An optical wavelength converting method, and a program therefor are provided that achieves high conversion efficiency stably using an nonlinear optical crystal, enabling manufacture of an all solid state ultraviolet laser oscillator that is durable with respect to practical application. Prescribed fundamental waves are input to a first crystal and a second crystal sequentially.

Abstract: An ethylene-&agr;-olefin copolymer obtained by a gas phase polymerization method in the presence of a catalyst, wherein the copolymer satisfies the following conditions (A-1) to (A-4): (A-1) Melt flow rate (MFR): 0.3 to 5.0 g/10 minutes (A-2) Melt flow rate ratio (MFRR): 20 or more (A-3) Density (d): 0.910 to 0.930 g/cm3 (A-4) Coldxylene-soluble portion (CXS)(wt %) is in the range defined by the formula (1): 1.5×10−4×d−125×MFR0.5+0.3≧CXS  formula (1).

Abstract: There is provided a polyolefin resin composition comprising: (i) a polyolefin resin, and (ii) an anti-blocking agent in an amount of from 500 to 15,000 ppm by weight based on the weight of the polyolefin resin, which anti-blocking agent is made of a natural mineral and has specific particle diameters.

Abstract: A laser apparatus includes a wavelength conversion device composed of single crystal lithium tetraborate for converting a wavelength by passing an incident laser beam therethrough. The relationship between the orientation of the crystal axis of the single-crystal lithium tetraborate and the direction of incidence of the laser beam is determined so as to prevent beam walk-off from occurring in the laser beam propagating through the conversion device. A method of converting a wavelength by passing an incident laser beam through a wavelength conversion device composed of single-crystal lithium tetraborate is also disclosed.

Abstract: The CPU detects an error in the timing of offset stacking by the offset stacker on the basis of the time when the offset motor signal for driving the offset motor is generated and the time when the initial position sensor is turned ON. Upon detecting an error in the timing of offset stacking, the CPU forces the image formation by the image forming unit and the paper transportation by the paper transporting motor to stop, thus preventing paper from being introduced into the offset stacker.

Abstract: There is provided a polyolefin resin composition comprising:

Abstract: A borate single crystal which can stably perform light wavelength conversion with high efficiency down to the ultraviolet region is represented by the chemical formula (A2O).(B2O3)x, and is an orthorhombic crystal belonging to the P212121 space group, wherein A includes two elements selected from the group consisting of Li, Na, K, Rb, and Cs, and 1.5<x<2.5.

Abstract: The CPU detects an error in the timing of offset stacking by the offset stacker on the basis of the time when the offset motor signal for driving the offset motor is generated and the time when the initial position sensor is turned ON. Upon detecting an error in the timing of offset stacking, the CPU forces the image formation by the image forming unit and the paper transportation by the paper transporting motor to stop, thus preventing paper from being introduced into the offset stacker.

Abstract: An olefin polymer characterized by having (A) a density of from 0.850 to 0.940 g/cm3, (B) a melt flow rate (MFR) of from 0.1 to 200 g/10 minutes, and (C) a relation between the melt flow rate (MFR) and an intrinsic viscosity [&eegr;] measured in tetralin at 135° C. satisfying the range of the following equation (1): −4.04 log [&eegr;]+0.6≦log MFR≦−4.04 log [&eegr;]+0.96  (1) and its a film or sheet, and a method for producing an olefin polymer characterized by homopolymerizing an olefin or copolymerizing two or more olefins, with a catalyst for olefin polymerization, comprising: (A) a transition metal complex represented by the general formula [I] below; (B) at least one aluminum compound selected from (B1) to (B3); and/or (C) at least one boron compound selected from (C1) to (C3), at a temperature of at least 130° C. under a pressure of at least 300 kg/cm2G.

Abstract: A solid catalyst component (A) for olefin polymerization comprising Mg, Ti, a halogen and a cyclic organic nitrogen compound (C), a solid catalyst comprising the solid catalyst component and an organoaluminum compound, and a process for producing an olefin polymer with the catalyst.According to the present invention, there can be provided an olefin polymerization catalyst having a high catalyst activity per titanium enough to make the removal of catalyst residues unnecessary and a process for producing an olefin polymer having a low content of low molecular weight component with the catalyst.

Abstract: A repairing method using a lance for repairing an oven wall surface of a coke oven comprises the steps of arranging a distance sensor at a top end of the lance, quantitatively measuring a depth of a worn or a damaged area by the distance sensor, and blowing a repairing material from a repairing nozzle to the worn area in accordance with a measurement result to thereby repair the worn area. The lance used in this repairing method has a multistage structure having a polygonal cross section and is extendable. With this structure, the oven wall surface can be scanned in a linear fashion or along a plane. If the top end of the lance is movable in accordance with a basic motion pattern and/or a travelling pattern, it is possible to readily repair a repair range having a complicated shape.

Abstract: A novel ethylene-.alpha.-olefin copolymer and a molded article formed therefrom, wherein (A) a density is 0.870 to 0.945 g/cm.sup.3, (B) a relation between an activation energy of flow Ea (J/mole K) obtained by measurement of viscoelasticity at at least three temperatures in the molten state and a melt flow rate MFR (g/10 min) satisfies the following equation (1):logEa.gtoreq.4.6-0.04.times.logMFR (1),(C) a coefficient Cx of variation of chemical composition distribution represented by the following equation (2) is 0.40 to 0.80:Cx=.sigma./SCB.sub.ave (2)wherein .sigma. is a standard deviation of chemical composition distribution (1/1,000 C) and SCB.sub.ave is the average of short chain branchings per 1,000 C (1/1,000 C), (D) a ratio of a weight average molecular weight Mw to a number average molecular weight Mn (Mw/Mn) is 3 to 20, and (F) a ratio (TVR) of trans-vinylene type carbon-carbon double bonds to total carbon-carbon double bonds as determined with an infrared absorption spectrum being 1 to 30%.

Abstract: An ethylene-.alpha.-olefin copolymer having;(A) a density (.rho.) of from 0.870 to 0.945 g/cm.sup.3,(B) a ratio (TVR) of trans-vinylene type carbon-carbon double bonds to total cabon-carbon double bonds as determined with an infrared absorption spectrum being 35% or more, and(C) a weight average molecular weight (Mw) of from 3.0.times.10.sup.4 to 6.0.times.10.sup.5, and a molded article comprising thereof. The present invention provides an ethylene-.alpha.-olefin copolymer and a molded article comprising thereof having an excellent transparency, high gloss and high melt tension.

Abstract: A process for polymerizing ethylene at a high temperature under high pressure, which comprises contacting ethylene alone or along with an .alpha.-olefin at a temperature of 120.degree. C. or more at a pressure of 350 kg/cm.sup.2 or more with a catalyst consisting essentially of (A) a reaction product of (A1) a titanium compound having at least one titanium-nitrogen bond with (A2) an organometallic compound of an element of Groups I to III of the Periodic Table and (B) an organoaluminum compound. Said process enables the production of an ethylene polymer or copolymer having a narrow composition distribution and a high molecular weight and being excellent in weather resistance, color development, transparency, corrosiveness and mechanical properties.

Abstract: A process for producing an olefin polymer which Comprises homopolymerizing or copolymerizing an olefin in a gas phase by using a catalyst system comprising the following components A) and B):A) a solid catalyst component prepared by immobilizing a catalyst component comprising at least titanium, magnesium, halogen and an electron-donative compound on a porous polymer material, said solid catalyst component satisfying the following conditions (a), (b) and (c):(a) ethylene is preliminarily polymerized thereon in an amount of 50-200 g per gram of the component previously immobilized on the porous polymer material.(b) the preliminary polymerization of ethylene is carried out at most at a rate of 3 g/g-immobilized component-hour at least until the quantity of the preliminarily polymerized ethylene reaches 5 g/g-immobilized component, and(c) the preliminarily polymerized ethylene polymer has an intrinsic viscosity [.eta.] of 0.5 dl/g to 2.5 dl/g as measured in tetralin at 135.degree. C.

Abstract: An image-forming apparatus for forming an image at one of a plurality of image-forming conditions, including a standard condition, includes an image-forming unit; input keys coupled to the image-forming unit; a controller coupled to the input keys, the controller determines one of the image-forming conditions corresponding to the operation of the input keys; a timer coupled to the controller, the timer outputting a predetermined signal when a predetermined time has elapsed after the operation so as to make the controller change the image-forming condition to the standard condition; and a prohibit key coupled to the controller, to prevent the controller from changing to the standard condition.

Abstract: A liquid catalyst component which can be used as a component of a catalyst system in combination with an organoaluminum compound (B) for producing ethylene-.alpha.-olefin copolymers.

Abstract: A process for producing an ethylene-.alpha.-olefin copolymer which comprises copolymerizing ethylene and an .alpha.-olefin at a temperature higher than 120.degree. C. by using a catalyst system comprising a specified titanium amide compound represented by general formula (R.sup.1 R.sup.2 N).sub.4-n TiY.sub.n and an oxygen-containing alkylaluminum compound. According to the above process, there can be obtained ethylene-.alpha.-olefin copolymers narrow in composition distribution, high in molecular weight and excellent in weather resistance, colorizability, corrosion resistance and dynamic properties.

Abstract: An olefin polymerization catalyst comprising:(A) a solid catalyst component containing a trivalent titanium, which is represented by the composition formulaMg.sub.m Ti(OR).sub.n X.sub.p [ED].sub.q(wherein R is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen, ED is a electron donative compound, and m, n, p and q are each a number satisfying 1.ltoreq.m.ltoreq.51, 0<n.ltoreq.5, 5.ltoreq.p.ltoreq.106 and 0.2.ltoreq.q.ltoreq.2) obtained by reducing a titanium compound represented by the general formula Ti(OR.sup.1).sub.a X.sub.4-a (wherein R.sup.1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and a is a number satisfying 0<a.ltoreq.

Abstract: An olefin polymerization catalyst comprising:(A) a solid catalyst component containing a trivalent titanium, which is represented by the composition formulaMg.sub.m Ti(OR).sub.n X.sub.p [ED].sub.q(wherein R is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen, ED is a electron donative compound, and m, n, p and q are each a number satisfying 1.ltoreq.m.ltoreq.51, 0<n.ltoreq.5, 5.ltoreq.p.ltoreq.106 and 0.2.ltoreq.q.ltoreq.2) obtained by reducing a titanium compound represented by the general formula Ti(OR.sup.1).sub.a X.sub.4-a (wherein R.sup.1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and a is a number satisfying 0<a.ltoreq.