Abstract: The present invention provides a compound comprising EO (ethylene oxide)/PO (propylene oxide) block copolymer which can be used as an emulsifier. The present invention also provides a water-borne epoxy resin composition comprising the compound and a coating composition comprising the water-borne epoxy resin composition. The advantages of the present invention is that the epoxy resin composition or the coating composition, which the compound of the present invention is added to, enhances the compatibility between water and epoxy resin, and enhances the anticorrosive properties of the epoxy resin composition and the coating composition.

Abstract: An ultraviolet C light-emitting diode includes an n-type semiconductor layer, a p-type semiconductor layer, an active layer, a first electron blocking layer, and a second electron blocking layer. The active layer is disposed between the n-type semiconductor layer and the p-type semiconductor layer. The wavelength of the maximum peak of the spectrum emitted by the active layer ranges from 230 nanometers to 280 nanometers. The concentration of magnesium in the active layer is less than 1017 atoms/cm3. The first electron blocking layer and the second electron blocking layer are disposed between the p-type semiconductor layer and the active layer. The concentration of magnesium in the second electron blocking layer is greater than that of the first electron blocking layer and is greater than 1018 atoms/cm3.

Abstract: An ultraviolet C light-emitting diode including an n-type semiconductor layer, a p-type semiconductor layer, an active layer, a two-dimensional hole gas (2DHG) inducing layer, and an electron blocking layer is provided. The active layer is disposed between the n-type semiconductor layer and the p-type semiconductor layer, wherein a wavelength of a maximum peak of a spectrum emitted by the active layer ranges from 230 nm to 280 nm. The two-dimensional hole gas (2DHG) inducing layer is disposed between the active layer and the p-type semiconductor layer. A concentration of magnesium in the 2DHG inducing layer is less than 1017 atoms/cm3. The electron blocking layer is disposed between the p-type semiconductor layer and the 2DHG inducing layer. A concentration of magnesium in a part of the electron blocking layer adjacent to the 2DHG inducing layer is greater than 1019 atoms/cm3.

Abstract: A linkage mechanism including a base, a first linkage, a second linkage and a driving element is provided. The first linkage has a first end portion and a second end portion opposite to each other, and the first end portion is pivoted to the base. The second linkage has third end portion and a fourth end portion opposite to each other, wherein the third end portion is coupled to the base, and the second end portion and the fourth end portion are coupled with each other. The driving element is coupled to at least one of the second end portion and the fourth end portion, and is configured to drive the first linkage and the second linkage to move relative to the base. A walking aid device is also provided.

Abstract: A walker apparatus is provided. The walker apparatus includes a base, a plurality of wheels, a connection bracket, a handle unit and an actuating unit. The wheels are connected to the base. The connection bracket pivots on the base. The handle unit is disposed on the connection bracket. The actuating unit is connected to the base and the connection bracket. The actuating unit moves the connection bracket between a getting-up orientation and a walking-assistance orientation relative to the base. The user can stand up from a sitting position using the walker apparatus without external assistance from other people.

Abstract: A walking aid device including a moving body, a message receiving element, a positioning element, and a processor is provided. The message receiving element, the positioning element, and the processor are respectively disposed at the moving body, and the message receiving element and the positioning element are respectively electrically coupled to the processor. The message receiving element is configured to receive a message from a target, and the positioning element is configured to locate a position of the moving body. When the message from a target is received by the message receiving element, the processor determines an orientation of the target according to the message, and the positioning element locates the position of the moving body. The processor produces a position data according to the orientation of the target and the position of the moving body, and controls the moving body to move to where the target is located.

Abstract: A rotational positioning mechanism includes a base, a rotational shaft, a rotational plate, at least two first switches and a positioning assembly. The rotational shaft is pivoted to the base. The rotational plate is connected to the rotational shaft and is configured to rotate relative to the base along with the rotational shaft. The rotational plate has at least two first positioning portions. The two first switches are respectively disposed at the two first positioning portions. The positioning assembly is disposed at the base, and comprises a positioning component configured to form a structural interference with any one of the first positioning portions or remove the structural interference. After the positioning component forms the structural interference with any one of the first positioning portions, the positioning component abuts against the corresponding first switch, and the degree of rotational freedom of the rotational plate and the rotational shaft are restricted.

Abstract: An ultraviolet C light-emitting diode includes an n-type semiconductor layer, a p-type semiconductor layer, an active layer, a first electron blocking layer, and a second electron blocking layer. The active layer is disposed between the n-type semiconductor layer and the p-type semiconductor layer. The wavelength of the maximum peak of the spectrum emitted by the active layer ranges from 230 nanometers to 280 nanometers. The concentration of magnesium in the active layer is less than 1017 atoms/cm3. The first electron blocking layer and the second electron blocking layer are disposed between the p-type semiconductor layer and the active layer. The concentration of magnesium in the second electron blocking layer is greater than that of the first electron blocking layer and is greater than 1018 atoms/cm3.

Abstract: A diffuser includes a cone body including an apex portion, a bottom portion, and a side edge portion. The apex portion forms a partial spherical surface, and the side edge portion is aspherical and is connected between the apex portion and the bottom portion. The apex portion satisfies: 2R/3?r?R, where r is a radius of curvature of the apex portion, and R is a radius of curvature of a spherical diaphragm of a tweeter speaker. A loudspeaker including a tweeter speaker and a diffuser is also provided.

Abstract: A movable carrier includes a main body, a first wheel, a driving module, a first support member, a second wheel, a seat, a first handle and two first switches. The first wheel is pivotally connected to the main body. The driving module is disposed in the main body. The first support member is connected to the driving module. The second wheel is pivotally connected to the first support member. The seat is disposed on the main body. The first handle is pivotally connected to the seat and has a trigger portion. The first switches are disposed on the seat. When the first handle rotates with respect to the seat and the trigger portion triggers the first switch, the driving module drives the first support member to rotate with respect to the main body, so as to increase or decrease a distance between the first wheel and the second wheel.

Abstract: A walker apparatus is provided. The walker apparatus includes a base, a plurality of wheels, a connection bracket, a handle unit and an actuating unit. The wheels are connected to the base. The connection bracket pivots on the base. The handle unit is disposed on the connection bracket. The actuating unit is connected to the base and the connection bracket. The actuating unit moves the connection bracket between a getting-up orientation and a walking-assistance orientation relative to the base. The user can stand up from a sitting position using the walker apparatus without external assistance from other people.

Abstract: A diffuser includes a cone body including an apex portion, a bottom portion, and a side edge portion. The apex portion forms a partial spherical surface, and the side edge portion is aspherical and is connected between the apex portion and the bottom portion. The apex portion satisfies: 2R/3?r?R, where r is a radius of curvature of the apex portion, and R is a radius of curvature of a spherical diaphragm of a tweeter speaker. A loudspeaker including a tweeter speaker and a diffuser is also provided.

Abstract: The present invention provides an epoxy resin comprising: a polymer having a structure of a reaction product of a monomer of epoxy having at least two epoxide groups per molecule, a polyether monoamine, and an epoxidized oil. The present invention also provides an aqueous dispersion and a water-borne epoxy coating composition which comprise the epoxy resin. The present inventions are low in volatile organic compounds and have enhanced properties such as high hardness, high adhesion strength, high impact resistance and high corrosion resistance.

Abstract: A mobile carrier includes a first frame, a directional wheel pivoted to the first frame, a second frame pivoted to the first frame, a steering adjustment mechanism connected to the second frame, and a steering wheel. The steering adjustment mechanism includes a first rotating element and a second rotating element coupled to the first rotating element. When a first rotating axis of the first rotating element is perpendicular to a plane, the first and the second rotating elements are locked to each other and are capable of rotating around the first rotating axis simultaneously. When a second rotating axis of the second rotating element is perpendicular to the plane, rotational degree of freedom of the first rotating element is restricted, and the second rotating element is capable of rotating around the second rotating axis relative to the first rotating element. A steering adjustment mechanism is also provided.

Abstract: This disclosure relates to reactive epoxy compounds that have high water solubility. The reactive epoxy compounds are obtained by mixing an epoxy resin having at least two epoxy groups per molecule with a carboxyl group-containing compound obtained by reacting a polyetheramine comprising a primary amine and an acid anhydride derived from a polyvalent carboxylic acid. This disclosure also relates to waterborne epoxy resin composition comprising core-shell type epoxy resin particles dispersed in a solvent, wherein the particles are formed by an epoxy resin encapsulated in the reactive epoxy compounds of the present invention. The waterborne epoxy resin composition is low in volatile organic compounds (“VOC”).

Abstract: A mobile carrier includes a first frame, a directional wheel pivoted to the first frame, a second frame pivoted to the first frame, a steering adjustment mechanism connected to the second frame, and a steering wheel. The steering adjustment mechanism includes a first rotating element and a second rotating element coupled to the first rotating element. When a first rotating axis of the first rotating element is perpendicular to a plane, the first and the second rotating elements are locked to each other and are capable of rotating around the first rotating axis simultaneously. When a second rotating axis of the second rotating element is perpendicular to the plane, rotational degree of freedom of the first rotating element is restricted, and the second rotating element is capable of rotating around the second rotating axis relative to the first rotating element. A steering adjustment mechanism is also provided.

Abstract: A rotational positioning mechanism includes a base, a rotational shaft, a rotational plate, at least two first switches and a positioning assembly. The rotational shaft is pivoted to the base. The rotational plate is connected to the rotational shaft and is configured to rotate relative to the base along with the rotational shaft. The rotational plate has at least two first positioning portions. The two first switches are respectively disposed at the two first positioning portions. The positioning assembly is disposed at the base, and comprises a positioning component configured to form a structural interference with any one of the first positioning portions or remove the structural interference. After the positioning component forms the structural interference with any one of the first positioning portions, the positioning component abuts against the corresponding first switch, and the degree of rotational freedom of the rotational plate and the rotational shaft are restricted.

Abstract: A capacitive accelerometer device is provided, and includes a capacitive accelerometer module, a display device and a signal line. The capacitive accelerometer module includes one or more capacitive accelerometers for sensing an arterial acceleration pulse wave of a user. The display device includes a displayer and a speaker. The displayer is used to display the arterial acceleration pulse wave of the user. The speaker emits an audible signal according to a change value of the arterial acceleration pulse wave. The display device electrically connects to the capacitive accelerometer module via the signal line. The display device automatically senses the arterial acceleration pulse wave of the user and correspondingly generates the change value. The display device generates a prompt signal when the change value is equal to or larger than a predetermined value.

Abstract: A walking aid device including a moving body, a message receiving element, a positioning element, and a processor is provided. The message receiving element, the positioning element, and the processor are respectively disposed at the moving body, and the message receiving element and the positioning element are respectively electrically coupled to the processor. The message receiving element is configured to receive a message from a target, and the positioning element is configured to locate a position of the moving body. When the message from a target is received by the message receiving element, the processor determines an orientation of the target according to the message, and the positioning element locates the position of the moving body. The processor produces a position data according to the orientation of the target and the position of the moving body, and controls the moving body to move to where the target is located.

Abstract: This disclosure relates to reactive epoxy compounds that have high water solubility. The reactive epoxy compounds are obtained by mixing an epoxy resin having at least two epoxy groups per molecule with a carboxyl group-containing compound obtained by reacting a polyetheramine comprising a primary amine and an acid anhydride derived from a polyvalent carboxylic acid. This disclosure also relates to waterborne epoxy resin composition comprising core-shell type epoxy resin particles dispersed in a solvent, wherein the particles are formed by an epoxy resin encapsulated in the reactive epoxy compounds of the present invention. The waterborne epoxy resin composition is low in volatile organic compounds (“VOC”).