Abstract: A method having a safety sensor and a safety sensor having at least one first evaluation unit having a first evaluation program, and at least one second evaluation unit having a second evaluation program. A two-channel system is formed with each evaluation unit being connected to a respective random access memory, and with each evaluation unit having a respective program memory, with a bidirectional communication channel being arranged between the evaluation units. A cross-comparison of the evaluation results can be carried out between the evaluation units, with a user program being able to be stored in at least one of the two program memories and/or in one of the two random access memories, with at least that evaluation unit which executes the user program having a memory protection device which is configured to restrict memory access of the user program to a defined memory region within the random access memory.

Abstract: A method having a safety sensor and a safety sensor (SIS), comprising at least one first evaluation unit (A) having a first evaluation program (FWA) and comprising at least one second evaluation unit (B) having a second evaluation program (FWB), whereby a two-channel system (2KS) is formed, with each evaluation unit (A, B) being connected to a respective random access memory (RA, RB), and with each evaluation unit (A, B) having a respective program memory (FSA, FSB), with a bidirectional communication channel (KK) being arranged between the evaluation units (A, B), whereby a cross-comparison of the evaluation results can be carried out between the evaluation units (A, B), with a user program (PA) being able to be stored in at least one of the two program memories (FSA, FSB) and/or in one of the two random access memories (RA, RB), with at least that evaluation unit (A, B) which executes the user program (PA, PB) having a memory protection device (SSE) which is configured to restrict memory access of the user

Abstract: A pull-activated applicator includes a barrel, a pledget, a finger grip, and a deployment element. The pledget includes a withdrawal string and is located within the barrel. The barrel, the pledget, and the deployment element are configured such that application of a force to the deployment element in a first direction deploys the pledget and withdrawal string from the barrel in a second direction generally opposite the first direction.

Abstract: An electric bicycle and electric bicycle frame including batteries or a battery pack stored in one or more tubes of the frame. In some cases, a pair of top tubes extend rearward of the bicycle seat tube, and an electronics housing may be disposed between the rearward extending top tube portions. Alternatively or in addition, a removable bottom bracket shell portion and a removable bottom bracket insert may be provided, to allow convenient access to the interior portions of the down tube and/or seat tube of the frame. A battery pack and/or a battery electronics management unit may be conveniently within one or both of the down tube and the seat tube.

Abstract: A pull-activated applicator includes a barrel, a pledget, a finger grip, and a deployment element. The pledget includes a withdrawal string and is located within the barrel. The barrel, the pledget, and the deployment element are configured such that application of a force to the deployment element in a first direction deploys the pledget and withdrawal string from the barrel in a second direction generally opposite the first direction.

Abstract: A pull-activated applicator includes a barrel, a pledget, a finger grip, and a deployment element. The pledget includes a withdrawal string and is located within the barrel. The barrel, the pledget, and the deployment element are configured such that application of a force to the deployment element in a first direction deploys the pledget and withdrawal string from the barrel in a second direction generally opposite the first direction.

Abstract: An electric bicycle and electric bicycle frame including batteries stored in a pair of substantially parallel top tubes. In some cases, the top tubes extend rearward of the bicycle seat tube, and an electronics housing may be disposed between the rearward extending top tube portions.

Abstract: A pull-activated applicator includes a barrel, a pledget, a finger grip, and a deployment element. The pledget includes a withdrawal string and is located within the barrel. The barrel, the pledget, and the deployment element are configured such that application of a force to the deployment element in a first direction deploys the pledget and withdrawal string from the barrel in a second direction generally opposite the first direction.

Abstract: A process for stimulating a formation is disclosed wherein a diverting fluid is used to divert an acid treatment package from a high permeability or damaged portion of a formation to a low permeability or undamaged portion of a formation. The fluid preferably forms vesicles.

Abstract: This invention relates to a wellbore treatment fluid and a method of enhancing wellbore treatment fluids to increase efficiency and productivity of wells. More specifically this invention provides methods for enhancing the thermal stability of wellbore treatment fluids such as drill-in, completion, workover, packer, well treating, testing, spacer or hole abandonment fluids. The methods include providing a wellbore treatment fluid that comprises polyol, polysaccharide, weighting agent, and water, wherein the fluid is solids free.

Abstract: This invention relates to a well treatment fluid and a method to treat an/or fracture a subterranean formation comprising: injecting a well treatment fluid into the formation at sufficient pressure to fracture the formation wherein the fluid comprises: (a) one or more amphoteric surfactants; (b) water; (c) one or more nonaqueous solvents; (d) optionally, an acid forming compound; and (e) provided that if the acid forming compound is present a hydrophilic alcohol may also be optionally present; wherein the all or part of the fluid forms vesicles.

Abstract: This invention relates to a well treatment fluid and a method to treat an/or fracture a subterranean formation comprising: injecting a well treatment fluid into the formation at sufficient pressure to fracture the formation wherein the fluid comprises: (a) one or more amphoteric surfactants; (b) water; and (c) one or more nonaqueous solvents; (d) optionally, an acid forming compound, and (e) provided that if the acid forming compound is present a hydrophilic alcohol may also be optionally present.