Abstract: A search system is provided for presenting diamonds that are available for sale to a user of the search system. The search system includes a graphical interface through which the user may input search parameters corresponding to gemological features. Diamond listings are generated in accordance with the search parameters and arranged according to user preferences.

Abstract: A search system is provided for presenting diamonds that are available for sale to a user of the search system. The search system includes a graphical interface through which the user may input search parameters corresponding to gemological features. Diamond listings are generated in accordance with the search parameters and arranged according to user preferences.

Abstract: Ring attributes may be predicted using a predictive model. A diamond selection system determines predicted ring attributes by obtaining and analyzing data related to a recipient, such as social media activity. The diamond selection system may determine search parameters based on predicted ring attributes and present a curated selection or list of candidate stones and/or settings that match the determined search parameters, for example, in a user interface of a mobile electronic device.

Abstract: Ring attributes may be predicted using a predictive model. A diamond selection system determines predicted ring attributes by obtaining and analyzing data related to a recipient, such as social media activity. The diamond selection system may determine search parameters based on predicted ring attributes and present a curated selection or list of candidate stones and/or settings that match the determined search parameters, for example, in a user interface of a mobile electronic device.

Abstract: A search system is provided for presenting diamonds that are available for sale to a user of the search system. The search system includes a graphical interface through which the user may input search parameters corresponding to gemological features. Diamond listings are generated in accordance with te search parameters and arranged according to user preferences.

Abstract: Ring attributes may be predicted using a predictive model. A diamond selection system determines predicted ring attributes by obtaining and analyzing data related to a recipient, such as social media activity. The diamond selection system may determine search parameters based on predicted ring attributes and present a curated selection or list of candidate stones and/or settings that match the determined search parameters, for example, in a user interface of a mobile electronic device.

Abstract: A search system is provided for presenting diamonds that are available for sale to a user of the search system. The search system includes a graphical interface through which the user may input search parameters corresponding to gemological features. Diamond listings are generated in accordance with the search parameters and arranged according to user preferences.

Abstract: Ring attributes may be predicted using a predictive model. A diamond selection system determines predicted ring attributes by obtaining and analyzing data related to a recipient, such as social media activity. The diamond selection system may determine search parameters based on predicted ring attributes and present a curated selection or list of candidate stones and/or settings that match the determined search parameters, for example, in a user interface of a mobile electronic device.

Abstract: Users may provide images to the ring selection system via a ring selection interface of a client application. The ring selection system may analyze the images using one or more machine learning models to determine ring characteristics of rings depicted in the images. The ring selection system may determine a set of ring listings having the determined ring characteristics and display the set of ring listings in the ring selection interface.

Abstract: A compressor assembly for a portable oxygen concentrator includes a first compressor chamber having a first connector, a second compressor chamber having a second connector, and a tube having a first end having a first connection interface configured to connect to the first connector and a second end having a second connection interface configured to connect to the second connector. The first connection interface is shaped to maintain the connection between the first connector and the first connection interface in a fixed orientation and the second connection interface is shaped to maintain the connection between the second connector and the second connection interface in a fixed orientation. One or more of the first connector, the second connector, and the tube are compliant.

Abstract: A battery retaining system for a portable oxygen concentrator includes a first rail configured to receive a first slide of a battery, a second rail configured to receive a second slide of the battery, the second rail being spaced apart from the first rail so as to form a channel configured to receive the battery, and a flexible stiffening mechanism configured to impart a biasing force on a surface of the battery when the battery is received within the channel. The flexible stiffening mechanism includes a protrusion projecting from the first rail at least partially towards the second rail and a slit positioned behind the protrusion and configured to facilitate travel of the protrusion fore and aft.

Abstract: An adsorber for a gas concentrator includes an adsorbent material having adsorbent particles and a vessel housing the adsorbent material. The vessel includes a vessel wall having a non-circular cross section and at least one stiffening support. A combination of a thickness of the vessel wall and a stiffness of the stiffening support is sufficient to limit deformation of the vessel wall to at least one of less than 0.1 mm and less than 25% of an average diameter of the adsorbent particles under a pressure swing of at least 30 psi within the vessel.

Abstract: A method of operating a compressor system includes determining an efficiency of a compressor configured to operate at a plurality of output flow settings, including one or more of measuring, calibrating, calculating, or modeling motor efficiency over a range of supply voltage and pulse width modulation duty cycle combinations, each combination including a supply voltage of a plurality of supply voltages and a pulse width modulation duty cycle of a plurality of pulse width modulation duty cycles. The method further includes selecting a supply voltage and a pulse width modulation duty cycle for use at at least one output flow setting of the plurality of output flow settings based on the determined efficiency of the compressor, generating the selected supply voltage by maintaining, reducing, or increasing a nominal supply voltage, and applying the selected pulse width modulation duty cycle.

Abstract: Ring attributes may be predicted using a predictive model. A diamond selection system determines predicted ring attributes by obtaining and analyzing data related to a recipient, such as social media activity. The diamond selection system may determine search parameters based on predicted ring attributes and present a curated selection or list of candidate stones and/or settings that match the determined search parameters, for example, in a user interface of a mobile electronic device.

Abstract: A search system is provided for presenting diamonds that are available for sale to a user of the search system. The search system includes a graphical interface through which the user may input search parameters corresponding to gemological features. Diamond listings are generated in accordance with the search parameters and arranged according to user preferences.

Abstract: CNS malignancy is treated in a subject suffering from a CNS malignancy by administering to the subject an antisense oligonucleotide having a sequence of bases that is complementary to portions of both the gene encoding IGFBP-2 and the gene encoding IGFBP-5, and which is of sufficient length to act as an inhibitor of the effective amount of IGFBP-2 and IGFBP-5, in an amount effective to reduce effective levels of IGFBP-2 and IGFBP-5 in cells of the CNS malignancy.