Abstract: A shoe cover dispenser device for installing a plurality of shoe covers includes a frame, an installation assembly installed on the frame, and the locking assembly installed on the frame and is capable of locking the installation assembly, so that the installation assembly can facilitate the installation of the shoe covers on or the removal of the shoe covers from the installation assembly.

Abstract: A detachable shoe cover includes a shoe cover main body having a receiving cavity, an elastic opening edge portion defining an opening provided around a top edge portion of the shoe cover main body, and an interconnection arrangement for interconnecting a plurality of the detachable shoe covers to be installed in a dispenser apparatus. The interconnection arrangement includes a front portion of the shoe cover main body, a rear portion of the shoe cover main body, two front joint perforations provided in the front portion, and two rear joint perforations provided in the rear portion.

Abstract: A shoe cover dispenser device for installing a plurality of shoe covers includes a frame, an installation assembly installed on the frame, and the locking assembly installed on the frame and is capable of locking the installation assembly, so that the installation assembly can facilitate the installation of the shoe covers on or the removal of the shoe covers from the installation assembly.

Abstract: A method of generating X-ray emission, and a system for generating X-ray emission are provided. The method comprises the steps of generating a beam of free electrons using an electron source; directing the beam of free electrons onto a crystalline material having a periodic material structure; generating X-ray emission as a result of the interaction between the free electrons and the crystalline material; and extracting a portion of the X-ray emission for providing an X-ray beam having a selected photon energy; wherein the selected photon energy is tunable by controlling, at least, a tilt angle of the crystalline material relative to the beam of free electrons.

Abstract: A dispenser apparatus for a plurality of detachable shoe covers includes a frame, an installation assembly and a separator. The installation assembly is installed on the frame and includes two installation arms for installing the detachable shoe covers, wherein the two installation arms are configured to provide a dispenser arrangement at front end portions of the installation arms for guiding a frontmost detachable shoe cover of the detachable shoe covers installed in the installation assembly to be dispensed to an open state for wearing. The separator is arranged at the front end portions of the installation arms for separating the frontmost detachable shoe cover from the installation arms after being worn on a shoe of a user.

Abstract: A detachable shoe cover includes a shoe cover main body having a receiving cavity, an elastic opening edge portion defining an opening provided around a top edge portion of the shoe cover main body, and an interconnection arrangement for interconnecting a plurality of the detachable shoe covers to be installed in a dispenser apparatus. The interconnection arrangement includes a front portion of the shoe cover main body, a rear portion of the shoe cover main body, two front joint perforations provided in the front portion, and two rear joint perforations provided in the rear portion.

Abstract: A shoe cover dispenser device for installing a plurality of shoe covers includes a frame, an installation assembly installed on the frame, and the locking assembly installed on the frame and is capable of locking the installation assembly, so that the installation assembly can facilitate the installation of the shoe covers on or the removal of the shoe covers from the installation assembly.

Abstract: A shoe cover dispenser device for installing a plurality of shoe covers includes a frame, an installation assembly installed on the frame, and the locking assembly installed on the frame and is capable of locking the installation assembly, so that the installation assembly can facilitate the installation of the shoe covers on or the removal of the shoe covers from the installation assembly.

Abstract: A detachable shoe cover assembly includes a plurality of detachable shoe covers each of which is configured for being installed along two installation arms of an installation assembly of a dispenser device, guided to move to an dispenser arrangement of the installation assembly and dispensed from the dispenser arrangement of the installation assembly by detaching from the two installation arms. Each of the detachable shoe covers comprises a shoe cover main body having a receiving cavity, an elastic opening edge portion defining an opening, and an interconnection arrangement arranged for interconnecting the plurality of detachable shoe covers one-by-one in series and held along the two installation arms of the installation assembly of the dispenser device, wherein the interconnection arrangement is configured to be separated by a separator of the dispenser device such that the detachable shoe cover is detached from the installation arms of the dispenser device.

Abstract: A shoe cover dispenser device for installing a plurality of shoe covers includes a frame, an installation assembly installed on the frame, and the locking assembly installed on the frame and is capable of locking the installation assembly, so that the installation assembly can facilitate the installation of the shoe covers on or the removal of the shoe covers from the installation assembly.

Abstract: A shoe cover dispenser device for installing a plurality of shoe covers includes a frame, an installation assembly installed on the frame, and the locking assembly installed on the frame and is capable of locking the installation assembly, so that the installation assembly can facilitate the installation of the shoe covers on or the removal of the shoe covers from the installation assembly.

Abstract: A shoe cover dispenser device for installing a plurality of shoe covers includes a frame, an installation assembly installed on the frame, and the locking assembly installed on the frame and is capable of locking the installation assembly, so that the installation assembly can facilitate the installation of the shoe covers on or the removal of the shoe covers from the installation assembly.

Abstract: An isolated pluripotent trophoblast stem (TS) cell preparation, and methods of preparing the cell preparation and a disease model for a pregnancy related disorder are provided. The cell preparation includes cells that are capable of indefinite proliferation in vitro in an undifferentiated state and capable of differentiation into cells of the trophoblast lineage in vitro or in vivo.

Abstract: A method for manufacturing a copper foil with a rough surface in a plating tank includes causing an electrolyte solution to flow between an anode and a cathode with a current density of 5 ASF-40 ASF. The copper foil with a rough surface including dense nodules of single copper crystals is deposited on the cathode. The electrolyte solution includes chloride ions (20 ppm-80 ppm), polyethylene glycol (PEG) with a molecular weight of 400-8000 (100 ppm-700 ppm), sulfuric acid (20 g/L-200 g/L), copper sulfate pentahydrate (70 g/L-320 g/L) and a sulfur compound (1 ppm-60 ppm).

Abstract: An apparatus includes at least one conductive layer, an electromagnetic (EM) wave source, and an electron source. The conductive layer has a thickness less than 5 nm. The electromagnetic (EM) wave source is in electromagnetic communication with the at least one conductive layer and transmits a first EM wave at a first wavelength in the at least one conductive layer so as to generate a surface plasmon polariton (SPP) field near a surface of the at least one conductive layer. The electron source propagates an electron beam at least partially in the SPP field so as to generate a second EM wave at a second wavelength less than the first wavelength.

Abstract: A method for manufacturing a copper foil with a rough surface in a plating tank includes causing an electrolyte solution to flow between an anode and a cathode with a current density of 5 ASF-40 ASF. The copper foil with a rough surface including dense nodules of single copper crystals is deposited on the cathode. The electrolyte solution includes chloride ions (20 ppm-80 ppm), polyethylene glycol (PEG) with a molecular weight of 400-8000 (100 ppm-700 ppm), sulfuric acid (20 g/L-200 g/L), copper sulfate pentahydrate (70 g/L-320 g/L) and a sulfur compound (1 ppm-60 ppm).

Abstract: The method for producing a transparent conductive substrate includes forming metal meshes on a flexible non-conductive substrate with high transmittance. It's unnecessary to use palladium as a catalyst in this method. The metal meshes are in the form of nano/micro wires and the conductive substrate has high transmittance of 80%-90% at visible light wavelengths of 390-750 nm.

Abstract: The method for producing a transparent conductive substrate includes forming metal meshes on a flexible non-conductive substrate with high transmittance. It's unnecessary to use palladium as a catalyst in this method. The metal meshes are in the form of nano/micro wires and the conductive substrate has high transmittance of 80%-90% at visible light wavelengths of 390-750 nm.

Abstract: Methods and apparatus for modulating a particle pulse include a succession of Hermite-Gaussian optical modes that effectively construct a three-dimensional optical trap in the particle pulse's rest frame. Optical incidence angles between the propagation of the particle pulse and the optical pulse are tuned for improved compression. Particles pulses that can be modulated by these methods and apparatus include charged particles and particles with non-zero polarizability in the Rayleigh regime. Exact solutions to Maxwell's equations for first-order Hermite-Gaussian beams demonstrate single-electron pulse compression factors of more than 100 in both longitudinal and transverse dimensions. The methods and apparatus are useful in ultrafast electron imaging for both single- and multi-electron pulse compression, and as a means of circumventing temporal distortions in magnetic lenses when focusing ultra-short electron pulses.

Abstract: A shoe cover cartridge includes two guiding arms and a plurality of shoe covers overlapped in a sequential manner to define a standby shoe cover and a subsequent shoe cover. Front and rear interlocking units are provided at front and rear sides of each of the shoe cover respectively and are slidably engaged with the guiding arms at a position that the front interlocking unit at the subsequent shoe cover is located in front of the rear interlocking unit at the standby shoe cover along the guiding arms. Therefore, when the standby shoe cover is pulled for dispensing, the subsequent shoe cover is pulled by the standby shoe to dispense the shoe covers in a sequential order.