An example of an apparatus is provided. The apparatus includes a magnetic core to be inserted into a borehole to a formation. The apparatus further includes a first coil wound about the magnetic core. In addition, the apparatus includes a first current supply to generate a first current to run through the first coil. Furthermore, the apparatus includes a first controller to control the first current supply. The first controller is to oscillate the first current to generate a magnetic field in the formation. Heat is to be generated in the formation via induction.

Disclosed apparatus and methods make it convenient for small portions of lasagna to be prepared conveniently and quickly. A cooking vessel and its top re described. The internal chamber of the cookware is rectangular, and its internal sidewalls are vertical. Length of the chamber is selected to accommodate layers of lasagna including a single piece of pasta. A foil container is inserted into the chamber, in which the lasagna layers are constructed, and the lasagna is cooked within the vessel and its insert. Walls of the cookware are made of ferromagnetic material such as cast iron and have a thickness that is capable of holding a significant amount of heat, which is transferred conductively to the lasagna during cooking, including pressure cooking. An induction cooking device is disclosed that does not require the cookware to be heated in a conventional oven. The device functions conjointly with the cookware.

Disclosed apparatus and methods make it convenient for small portions of lasagna to be prepared conveniently and quickly. A cooking vessel and its top re described. The internal chamber of the cookware is rectangular, and its internal sidewalls are vertical. Length of the chamber is selected to accommodate layers of lasagna including a single piece of pasta. A foil container is inserted into the chamber, in which the lasagna layers are constructed, and the lasagna is cooked within the vessel and its insert. Walls of the cookware are made of ferromagnetic material such as cast iron and have a thickness that is capable of holding a significant amount of heat, which is transferred conductively to the lasagna during cooking, including pressure cooking. An induction cooking device is disclosed that does not require the cookware to be heated in a conventional oven. The device functions conjointly with the cookware.

An electronic smoking device is provided including a power supply portion comprising a power supply, an atomizer/liquid reservoir portion comprising a liquid reservoir storing a liquid, and an atomizer adapted to atomize the liquid stored in the liquid reservoir when operated by the power supply. The atomizer extends away from the liquid reservoir in a first direction (L). The atomizer comprises first atomizer sections, wherein each of the first atomizer sections defines an opening that is at least partly encircled by the first atomizer section. The sizes of the openings defined by the first atomizer sections decrease with increasing distance of the first atomizer sections from the liquid reservoir in the first direction.

An electronic smoking device is provided including a power supply portion comprising a power supply, an atomizer/liquid reservoir portion comprising a liquid reservoir storing a liquid, and an atomizer adapted to atomize the liquid stored in the liquid reservoir when operated by the power supply. The atomizer extends away from the liquid reservoir in a first direction (L). The atomizer comprises first atomizer sections, wherein each of the first atomizer sections defines an opening that is at least partly encircled by the first atomizer section. The sizes of the openings defined by the first atomizer sections decrease with increasing distance of the first atomizer sections from the liquid reservoir in the first direction.

An inductive heater assembly for an aerosol-generating device is provided, the assembly including: at least one inductor coil configured to generate a varying magnetic field when a varying electric current flows through the coil; at least one susceptor arranged to be penetrated by the magnetic field generated by the coil to heat the susceptor; at least one temperature sensor arranged to determine a temperature of the susceptor, the temperature sensor includes first and second resistive sensing elements, the first element being connected to the second element, and the first element being positioned relative to the second element such that a current induced in the first element by the magnetic field opposes a current induced in the second element by the magnetic field. An aerosol-generating device including the inductive heater assembly, control circuitry, and a power source, is also provided.

An inductive heater assembly for an aerosol-generating device is provided, the assembly including: at least one inductor coil configured to generate a varying magnetic field when a varying electric current flows through the coil; at least one susceptor arranged to be penetrated by the magnetic field generated by the coil to heat the susceptor; at least one temperature sensor arranged to determine a temperature of the susceptor, the temperature sensor includes first and second resistive sensing elements, the first element being connected to the second element, and the first element being positioned relative to the second element such that a current induced in the first element by the magnetic field opposes a current induced in the second element by the magnetic field. An aerosol-generating device including the inductive heater assembly, control circuitry, and a power source, is also provided.

Disclosed is an apparatus for heating smokable material to volatilize at least one component of the smokable material. The apparatus includes a heating zone for receiving at least a portion of an article comprising smokable material; a magnetic field generator for generating a varying magnetic field; and an elongate heating element extending at least partially around the heating zone and comprising heating material that is heatable by penetration with the varying magnetic field to heat the heating zone.

Disclosed is an apparatus for heating smokable material to volatilize at least one component of the smokable material. The apparatus includes a heating zone for receiving at least a portion of an article comprising smokable material; a magnetic field generator for generating a varying magnetic field; and an elongate heating element extending at least partially around the heating zone and comprising heating material that is heatable by penetration with the varying magnetic field to heat the heating zone.

The coil substrate may include a substrate; a first conductor layer including a plurality of first and second segments periodically disposed on a top and a bottom of the substrate; a second conductor layer including a plurality of first and second segments periodically overlapping the first conductor layer on the top and the bottom of the substrate; a first connection line that connects the first and second segments of the first conductor layer; and a second connection line that connects the first and second segments of the second conductor layer. The first connection line includes a first region exposed on at least one of first and second surfaces that are opposite to each other of the substrate and second and third regions disposed through the substrate from both sides of the first region.