A method for controlling an economizer in a building HVAC system includes providing a manipulated variable as an input to a control process, holding the manipulated variable at a first extremum during a first portion of an evaluation period, and applying a dither signal to the manipulated variable during a second portion of the evaluation period. The dither signal causes the manipulated variable to deviate from the extremum. The method further includes monitoring a variable of interest output by the control process during the first and second portions of the evaluation period and switching the manipulated variable to a second extremum opposite the first extremum in response to the variable of interest moving toward an optimal value during the second portion of the evaluation period.

In some embodiments, apparatuses and methods are provided herein useful to assess monitor, improve, and/or modify health and well-being as it relates to people associated with a habitable or other built environments or spaces therein. In some embodiments, an intervention assessment system and methods include one or more sensors for measuring aspects related to the built environment, a personal user device, and a control circuit configured to receive one or more measurements form the sensor(s), identify a problem with the built environment, and identify potential interventions based on the indicators associated with the problem. By one approach, a plurality of potential interventions may be ranked based on, for example, the ability to reduce the prevalence of the problem or indicator in the built environment, feasibility, cost, and timeliness. In some approaches, the system and method also select and may implement one or more interventions.

When a voltage signal is input to input terminals as a positive voltage, the voltage conversion circuit generates a control voltage proportional to an input voltage by a voltage-dividing circuit according to resistance elements, a voltage follower circuit according to an operational amplifier, and a voltage-dividing circuit according to resistance elements. When a voltage signal is input to the input terminals as a negative voltage, since the operational amplifier outputs a power supply voltage according to an input of the negative voltage, the voltage conversion circuit generates a predetermined positive voltage obtained by dividing the power supply voltage by the resistance elements as the control voltage. The predetermined positive voltage is higher than a voltage range of the control voltage when the voltage signal is input as the positive voltage.

An image pickup apparatus which is able to obtain an image with high sharpness within a short period of time using a simple structure when operated in a low-temperature environment. A lens unit and a heater are provided in an internal space of a main case, and the internal space is divided into a first closed space and a second closed space via an opening, which is opened and closed by a valve member. A detecting unit detects a temperature in the internal space. An opening and closing unit opens and closes the valve member. A control unit controls opening and closing actions of the valve member.

A regulating device for regulating a cooling circuit is described. The regulating device according to the disclosure includes a first regulating stage, wherein the first regulating stage is designed to determine, using one or more input variables, a cooling/heating power of the cooling circuit or a variable proportional thereto. The first regulating stage is also designed to determine a first control deviation. The first regulating stage is also designed to output a controlled variable of the first regulating stage comprising a desired temperature of a coolant or a variable proportional thereto, which is derived from the first control deviation. The regulating device according to the disclosure also includes a second regulating stage, wherein the second regulating stage is positioned in series with the first regulating stage and designed to receive the controlled variable of the first regulating stage as a control output. The second regulating stage is also designed to determine a second control deviation. The second regulating stage is also designed to output a controlled variable of the second regulating stage comprising an abstract signal, which is derived from the second control deviation.

A terminal includes a storage in which control method information is stored, the control method information indicating a relationship between each of a plurality of heating methods of an ingredient and each of a plurality of corresponding control methods for reducing heating power of a cooking appliance; and a controller that, in a case where the absence of a user of the cooking appliance from a kitchen is detected for a predetermined period of time during execution of one of the plurality of heating methods, determines a first control method corresponding to the one of the plurality of heating methods based on the control method information stored in the storage and then causes the cooking appliance to execute the first control method. The first control method is a method for reducing the heating power used in the one of the plurality of heating methods.

A control device for an on-vehicle electric compressor controls and drives an electric motor arranged in the on-vehicle electric compressor. The control device includes a temperature acquisition unit, a current detector, a threshold current value setting unit, and a motor current controller. The temperature acquisition unit acquires a temperature of the control device. The current detector detects a motor current, which is current that flows through the electric motor. The threshold current value setting unit sets a threshold current value in accordance with the temperature of the control device acquired by the temperature acquisition unit. The motor current controller controls the motor current based on a detection result of the current detector so that the motor current becomes less than or equal to the threshold current value.

A system includes a network device installed at a site, the network device including an operating condition configured to be altered by an input initiated external to the site. The system also includes at least one multi-user configurable geographical boundary capable of being established about the site to alter the operating condition in response to a location based information of a user relative to the site and the geographical boundary. A method of managing a site includes detecting a network device installed at a site, the network device having an operating condition configured to be altered by an input initiated external to the site. The method also includes enabling configuration of at least one multi-user configurable geographical boundary capable of being established about the site to alter the operating condition in response to a location based information of a user relative to the site and the geographical boundary.

An enclosure system that can include a hazardous location enclosure having at least one wall forming a cavity. The enclosure system can also include a temperature-sensitive component positioned within the cavity. The enclosure system can further include a measuring device configured to measure a temperature within the cavity of the hazardous location enclosure. The enclosure system can also include a climate control device configured to change the temperature within the cavity. The enclosure system can further include a controller operatively coupled to the climate control device and the measuring device, where the controller controls the climate control device to change the temperature within the cavity of the hazardous location enclosure.

An enclosure system that can include a hazardous location enclosure having at least one wall forming a cavity. The enclosure system can also include a temperature-sensitive component positioned within the cavity. The enclosure system can further include a measuring device configured to measure a temperature within the cavity of the hazardous location enclosure. The enclosure system can also include a climate control device configured to change the temperature within the cavity. The enclosure system can further include a controller operatively coupled to the climate control device and the measuring device, where the controller controls the climate control device to change the temperature within the cavity of the hazardous location enclosure.