SURVEILLANCE USING WIRELESS CONTACT LENSES ON FOWL AND LIVESTOCK

Abstract

A surveillance wireless contact lens powered by body fluids for animals and fowls is disclosed using Wi-Fi, Bluetooth®, wireless local area network (WLAN), satellite and cellular tower and radio communication network. The contact lens comprises a molten material, which is injected into a mold cavity through under pressure for making the lens. The contact lens has a central optic portion with a concavo-convex shape, wherein the central optic portion having a depression at the center. A peripheral bearing portion is extended from and about the central optic portion and having an outer margin, which is placed within the limbus of an eye of the animal and/or fowl and opposite the white outer layer of the eyeball. The contact lens further comprises a processor disposed on the peripheral bearing portion, configured to control the operation of the contact lens via an electrical circuit. The electrical circuit in communication with the processor is configured to connect to electronic components include a power source, a light sensor, a communication module, and a camera.

Claims

1. A wireless contact lens for animals and fowls, comprising: a molten material having a central optic portion with a concavo-convex shape, wherein the central optic portion having a depression at the center and a recessed inner surface; a peripheral bearing portion extending from and about the central optic portion, wherein the peripheral bearing portion having an outer margin, which is placed within the limbus of an eye of the animal and/or fowl and opposite the white outer layer of the eyeball; and wherein a thickness of the peripheral bearing portion diminishes from its central portion to the outer margin and the inner surface is rounded adjacently the outer margin to loin the Inner surface to an outermost bounding surface of the wireless contact lens; a processor disposed on the peripheral bearing portion, wherein the processor is configured to control the operation of the wireless contact lens via an electrical circuit; a glucose sensors, wireless power transfer circuits and a display pixels to visualize a sensing signals are integrated within wireless contact lens using transparent and stretchable nanostructures; and a self-moisturizing system configured to prevent dry eyes by maintaining a layer of fluid between the wireless contact lens and the eye of the animal; wherein the electrical circuit in communication with the processor is configured to connect to electronic components include at least one power source, at least one light sensor, and a communication module, and wherein the power source in communication with the electrical circuit is configured to supply power to the electrical circuit and the electronic components, wherein the wireless contact lens having slightly curved inner and outer surfaces in section to conform it to the average contour of the eye of the animal and/or fowl; wherein the glucose sensor is configured to monitor a glucose level in eye fluids; and wherein the communication module is further configured to allow a user to monitor an eye view of the animals and fowls using an external user computing device.

2. The wireless contact lens of claim 1, wherein the recessed inner surface is spaced from the cornea of the eye of the animal and/or fowl to form a chamber for receiving a nictitating membrane of the eye.

3. The wireless contact lens of claim 1, wherein the depression having a concave shape and a diameter less than one-fifth of the diameter of the central optic portion.

4. (canceled)

5. The wireless contact lens of claim 1, wherein the molten material is at least any one of a thermoplastic resin and a polymeric resin.

6. The wireless contact lens of claim 1, wherein the power source is a rechargeable bio fuel micro battery.

7. The wireless contact lens of claim 1, wherein the power source is configured to recharge using body fluids.

8. The wireless contact lens of claim 1, wherein the light sensor is connected to the electrical circuit and configured to determine amount of ambient light in the environment of the animal and/or fowl.

9. The wireless contact lens of claim 1, further comprises at least one camera, wherein the camera in communication with the processor is configured to capture the environment of the animal.

10. The wireless contact lens of claim 1, wherein the communication module is configured to wirelessly transmit signals and data from the wireless contact lens and to an external communication source and vice versa from the external communication source for controlling the wireless contact lens such as satellite and/or cellular tower.

11. The wireless contact lens of claim 1, wherein the communication module is further configured to receive and transmit signals from the external user computing device or a communication source to the power source via an antenna.

12. The wireless contact lens of claim 1, wherein the communication module is wirelessly connected to the external user computing device or communication source via a network.

13. The wireless contact lens of claim 12, wherein the network is at least any one of Wi-Fi, Bluetooth®, a wireless local area network (WLAN), and a radio communication network.

14. The wireless contact lens of claim 1, is made of a transparent material, which is injected into a mold cavity through under pressure for making the wireless contact lens.

15. The wireless contact lens of claim 1, wherein the animals and birds include chickens, ducks, pheasants, turkeys and other fowls as well as mammals such as pigs, sheep, and cattle, and also horses.

16. A wireless contact lens for animals and fowls, comprising: transparent material injected into a mold cavity through under pressure to form a central optic portion with a concavo-convex shape, wherein the central optic portion having a depression at the center and a recessed inner surface, wherein the depression having a concave shape and a diameter less than one-fifth of the diameter of the central optic portion; a peripheral bearing portion extending from and about the central optic portion, wherein the peripheral bearing portion having an outer margin, which is placed within the limbus of an eye of the animal and/or fowl and opposite the white outer layer of the eyeball; wherein the peripheral bearing portion slopes away from the outer surface of the central optic portion and said peripheral bearing portion has a thickness which diminishes from said central optic portion to the margin and the Inner surface Is rounded adjacently the Qatar margin to lain the toner surface to an outermost bounding surface of the wireless contact lens; a processor secured on the peripheral bearing portion, wherein the processor is configured to control the operation of the wireless contact lens using an electrical circuit; a glucose sensors, wireless power transfer circuits and a display pixels to visualize a sensing signals are integrated within wireless contact lens using transparent and stretchable nanostructures; and a self-moisturizing system configured to prevent dry eyes by maintaining a layer of fluid between the wireless contact lens and the eye of the animal; wherein the electrical circuit in communication with the processor is configured to connect to electronic components include at least one a rechargeable bio fuel micro battery, at least one light sensor, and a communication module, wherein the light sensor is connected to the electrical circuit and configured to determine amount of ambient light in the environment of the animal; wherein the power source in communication with the electrical circuit is configured to supply power to the electrical circuit and the electronic components, and at least one camera in communication with the processor, configured to capture the environment of the animal, wherein the wireless contact lens having slightly curved inner and outer surfaces in section to conform it to the average contour of the eye of the animal and/or fowl; and wherein the glucose sensor is configured to monitor a glucose level in eye fluids; and wherein the communication module is further configured to allow a user to monitor an eye view of the animals and fowls mine an external user computing device.

17. The wireless contact lens of claim 16, wherein the recessed inner surface is spaced from the cornea of the eye of the animal and/or fowl to form a chamber for receiving a nictitating membrane of the eye.

18. The wireless contact lens of claim 16, wherein the transparent material is at least any one of a molten material, a thermoplastic resin, and a polymeric resin.

19. The wireless contact lens of claim 16, wherein the communication module is configured to wirelessly transmit signals and data from the wireless contact lens and to an external communication source and vice versa from the external communication source for controlling the wireless contact lens, wherein the communication module is further configured to receive and transmit signals from the external user computing device or a communication source to the power source via an antenna.

20. The wireless contact lens of claim 16, wherein the communication module is wirelessly connected to the external device or communication source via a network, wherein the network is at least any one of Wi-Fi, Bluetooth®, a wireless local area network (WLAN), and a radio communication network.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0027] The foregoing summary, as well as the following detailed description of the invention, is better understood when reed in conjunction with the appended drawings. For the purpose of illustrating the invention, exemplary constructions of the invention are shown in the drawings. However, the invention is not limited to the specific methods and structures disclosed herein. The description of a method step or a structure referenced by a numeral in a drawing is applicable to the description of that method step or structure shown by that same numeral in any subsequent drawing herein.

[0028] FIG. 1 shows a perspective view of a wireless contact lens applied to a fowl, for example, a chicken by a user in an embodiment of the present invention.

[0029] FIG. 2 shows a side perspective view of the wireless contact lens applied to the fowl in one embodiment of the present invention.

[0030] FIG. 3 draws a schematic view of the wireless contact lens in one embodiment of the present invention.

[0031] FIG. 4 shows a schematic view of the contact lens configured to wirelessly communicate to a ground station via a network, in one embodiment of the present invention.

[0032] FIG. 5 shows a schematic view of the ground station receiving signals from the contact lens via a transceiver for monitoring the bird and eye view using a computing device in an exemplary embodiment of the present invention.

[0033] FIG. 6 shows a sectional view of a rechargeable bio Aral micro battery in an exemplary embodiment of the present invention.

[0034] FIG. 7 shows a sectional view of a two-part mold with an upper section and a lower section used for molding the wireless contact lens in one embodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS

[0035] A description of embodiments of the present invention will now be given with reference to the Figures. It is expected that the present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive.

[0036] Referring to FIGS. 1-2, a wireless contact lens 100 applied to a fowl 112, far example, a chicken by a user 114 in one embodiment is disclosed. In one embodiment, the contact lens 100 consists of a body of transparent material, for example, a thermoplastic resin, a medium-density or a low-density polyethylene or ethyl vinyl acetate, either clear or pigmented. In one embodiment, the contact lens 100 could be a molten material having a central optic portion 102 with a concavo-convex shape and a peripheral bearing portion 104 extending from and about the central optic portion 102 and having an outer margin 113 which lies within the limbus of the eye 115. In one embodiment, the central optic portion 102 having a depression 110 at the center. In one embodiment, the contact lens 100 includes slightly curved inner and outer surfaces in section to conform it to the average contour of the eye of any animal or fowl. In one embodiment, the thickness of the peripheral bearing portion 104 preferably diminishes from its central portion to the outer margin 113 and the inner surface is rounded adjacently the margin, as appears at 117 to join the inner surface 116 to the outermost bounding surface of the lens 130. Thereby, the contact lens 100 is perfectly smooth at the inner surface 116. In one embodiment, the outer surface 119 may have an edge, as is shown, but this is not essential, it is also free from burrs and irritations.

[0037] In one embodiment, the contact lens 100 in which the central optic portion 102 has its inner surface recessed to be spaced from the cornea 118 of the aye 115 of the fowl 112 and provide a chamber. When applied to the fowl 112, the nictitating membrane 124, which is situated beneath the peripheral bearing portion 104 could enter into this chamber. The outer eyelids 106 and 108 overlie the peripheral bearing portion 104. The contact lens 100 is preferably of circular outline. This has the advantage of facilitating installation of the contact lens 100 and of reducing the tendency for displacement of the lens 130 from the eye 115 of the fowl 112. In one embodiment, the user 114 could insert the contact lens 100 deeply under the lower and outer eyelid by fingers and dun pulling back the upper eyelid, thereby permitting the contact lens 100 to fall into place. The contact lens 100 is then moved to upwards for positioning at the center. In one embodiment, a vacuum applicator could be used for holding the contact lens 100 lens and it is also not required.

[0038] In one embodiment, the recessed inner surface lid of the central portion is concave, preferably with a radius of curvature different from, e.g. larger than, that of the outer surface 119 to produce distortion. Further, the inner surface lid is recessed with respect to the peripheral bearing portion 104 so as to lie in spaced relation to the cornea 118 of the eye 115, thereby providing a chamber 120. Further shown are the following parts of the eye: a sclera 122, a nictitating membrane 124 (also called the third or inner eyelid), the outer eyelids 106 and 108, a scleral ring, an anterior chamber 128 and lens 130. The peripheral bearing portion 104 overlies the sclera 122 or scleral ring 126 (herein for convenience collectively called the sclera) and, when applied to the fowl 112, also the nictitating membrane 124. This membrane can enter into the chamber 120 when the fowl 112 blinks its inner eyelid or nictitating membrane 124. The outer eyelids 106 and 108 overlie the peripheral bearing portion 104.

[0039] In one embodiment, the central optic portion 102 of the outer surface 119 has a depression 110, wherein the depression 110 has a diameter, which is a minor fraction of the diameter of the central optic portion 102, preferably less than one-fifth of this diameter, for example, one-tenth of this diameter. In one embodiment, the depression 110 may be of any shape but is preferably round and concave in cross section as shown in FIG. 2. This depression 110 is introduced and added distortion into the lens 130 at the optical axis. In one embodiment, the contact lens 100 is formed by using a molding process, in which the molten material is injected into the mold through a gate 132 which is a fine passage for passing through a protuberance in the mold surface. In one embodiment the contact lens 100 could be used for animals and fowls or birds include, but not limited to, chickens, ducks, pheasants, turkeys and other fowls as well as mammals such as pigs, sheep, and cattle, and also horses.

[0040] In some embodiments, the contact lens 100 could be a soft, smart contact lens in which glucose sensors, wireless power transfer circuits, and display pixels to visualize sensing signals in real time are folly integrated using transparent end stretchable nanostructures. The integration of this display into the smart lens eliminates the need for additional, bulky measurement equipment. This soft, smart contact lens could be transparent, providing distortion in order to control the behavior of the animate and/or fowls.

[0041] In one embodiment, the contact lens 100 further comprises tiny power sources to autofocus, much like a camera on whatever the animal or fowl is looking at. In one embodiment, the contact lens 100 could track the progress of glaucoma using tiny sensors. In one embodiment the contact lens 100 is further configured to measure glucose levels in eye fluids. In one embodiment, the contact lens 100 is further configured to prevent dry eyes using a self-moisturizing system, which maintains a layer of fluid between the contact lens 100 and the eye using a novel mechanism. In one embodiment, the contact lens 100 is further configured to monitor the eyes for potential health concerns. In some embodiment, the contact lens 100 could be used for humans.

[0042] Referring to FIG. 3, a schematic view of the contact lens 100 in one embodiment is disclosed. In one embodiment, the contact lens 100 further comprise a processor 134, which is securely disposed on the peripheral bearing portion 104. The processor 134 is configured to control the operation of the contact lens 100 via an electrical circuit 130. In one embodiment, the electrical circuit 138 could be an integrated electrical circuit. In one embodiment the electrical circuit 138 in communication with the processor 134 is configured to connect to electronic components include a communication module 140, at least one power source 144, and at least one light sensor 146. In one embodiment, the power source 144 in communication with the electrical circuit 138 is configured to supply power to the electrical circuit 138 and other electronic components. In one embodiment, the power source 144 could be, but not limited to, a rechargeable bio fuel micro battery. In another embodiment, the power source 144 could be, but not limited to, a super capacitor. In one embodiment, the power source 144 is configured to recharge using body fluids. In one embodiment, the power source 144 can be charged wirelessly via an antenna 142 and without raising the temperature of the contact lens 180 and also eliminating a potential lung-term cause of harm to the eyes and the contact lens 180 itself. In one embodiment, the antenna 142 is configured to receive continual power without needing to be plugged in to an external power source.

[0043] In one embodiment, the tight sensor 140 is connected to the electrical circuit 138 and configured to determine amount of ambient light in the environment of the animal and/or fowls. In one embodiment, the contact lens 180 further comprises at least one camera 130, wherein the camera 136 in communication with the processor 134 is configured to capture the environment of the animal and/or the fowl.

[0044] In one embodiment, the communication module 140 is configured to wirelessly transmit signals and data from the contact lens 100 and to an external communication source and vice versa from the external communication source for controlling the contact lens 100. In one embodiment, the communication module 140 in further configured to receive and transmit signals from an external device or a communication source to the power source 144 via the antenna 142. In one embodiment, the communication module 140 is wirelessly connected to the external device or communication source via a network 172 (shown in FIG. 4). In one embodiment, the network is at least any one of but not limited to, Wi-Fi, Bluetooth®, a wireless local area network (WLAN), and a radio communication network. In one embodiment, the contact lens 180 further comprises a global positioning system (GPS) sensor to determine GPS coordinates of the fowl or animal. The GPS coordinates could be transferred to the ground station 174 (shown in FIG. 4) to determine the location of the fowl or animal.

[0045] Referring to FIG. 4, the contact lens 100 configured to wirelessly communicate to a ground station 174 via a network 172 in one embodiment is disclosed. Another embodiment is satellite (not shown) and cellular tower linkage (not shown). In one embodiment the contact lens 100 is configured to transfer data and signals to and from the ground station 174. (n one embodiment, the data includes images and videos that ere captured by the camera 136, which is installed on the camera lens 100, thereby efficiently collecting the data for surveillance using the contact lens 100 on the fowls and animals or livestock. In one embodiment, the network 172 is at least any one of, but not limited to, Wi-Fi, Bluetooth®, a wireless local area network (WLAN), and a radio communication network. In one embodiment, the ground station 174 further comprises a computing device 176, wherein the competing device 176 is configured to send signals to the contact lens 160 and receive the data from the contact lens 100 and vice versa. In one embodiment, the computing device 176 is at least any one or a combination of, but not limited to, a computer, a laptop, a smartphone, a remote device, a personal digital assistant (PDA), a mobile phone, and a tablet, hi one embodiment, the computing device 176 comprises a processor, a memory, a communication module, and etc. The memory could include computer storage media in the form of volatile and/or nonvolatile memory such as read only memory (ROM) and/or random-access memory (RAM).

[0046] Referring to FIG. 5, a schematic view of the ground station 174 receiving signals 200 from the contact lens 100 via a transceiver 206 for monitoring the bird 112 and eye view using the computing device 176 in one embodiment is disclosed. In ono embodiment, the contact lens 100 is configured to send signals 200 to the ground station or satellite (not shown) or cellular tower (not shown) 174. In one embodiment, the ground station 174 further comprises a transceiver 206. The transceiver 206 is configured to transfer and receive (vice versa) signals 200 from the contact lens 100 via a network 172 (shown in FIG. 4) such as, but not limited to, Wi-Fi, Bluetooth®, a wireless local area network (WLAN), and a radio communication network. In one embodiment, the user could monitor the bird 112 and eye view of the bird 112 using the computing device 176, for example, a screen or a display.

[0047] Referring to FIG. 6, a rechargeable bio fuel micro battery such as in U.S. Pat. No. 10,340,546 Messinger/Kahn 180 in one embodiment is disclosed. In one embodiment, the contact lens 100 could be provided with the bio-fuel micro battery 180. In some embodiments, the micro battery 180 could be safely placed inside the fowl or animal. In one embodiment, the bio-fuel micro battery 180 is configured supply electrical power to the contact lens 100. In one embodiment, the bio-fuel micro battery 180 is made of biocompatible and inert materials in order to prevent or reduce any adverse immunological response to micro battery. In some preferred embodiments, the bio-fuel micro battery 180 is one of voltaic cells that generates electricity on the standard principle of biocompatible compartment 182, which is also referred to as a primary compartment. The biocompatible compartment 182 is configured to store a chemical substance, which may include but is not limited to: an acidic solution or sugar solution mainly including hydrochloric acid, small quantities of potassium chloride and sodium chloride, or sugar/glucose and the like used as the electrolyte.

[0048] In some embodiments, the biocompatible compartment 182 is filled with acid, and a refill electrolyte is supplied through bio membrane 184, which is coupled with a balloon nipple 186 using an external injection device. In some embodiments, the biocompatible compartment 182 is refueled by directly swallowing biological acid jukes, which may include but are not limited to: lemon juice, orange juice, pineapple juice, and any other sour juice and the like. The re tillable balloon nipple 186 is made of a biocompatible silken rubber in order to inject the solution externally, and the repeated injections of silicon rubber balloons do not hamper the body. In some other embodiments, the biocompatible compartment 182 is refueled with the biological acid jokes through intravenous therapy by infusing the predefined chemical substance into body. Also, in some embodiments, the biocompatible compartment 182 is refueled with the biological acid juices fay using at least one akin patch, a foot bath and the like processes to infuse predefined chemical substances into the body that travel to the micro battery 180, and enter the biocompatible compartment 182, e.g. via diffusing across the nipple 186.

[0049] Additionally, bio-membrane 184 is configured to diffuse at least one bio-fluid across the anode electrode and the cathode electrode (188 and 190) to generate electron follow far recharging the micro battery and/or for supplying power to a connected bio-medical implanted device. In one embodiment, bio-membrane 184 comprises: a biocompatible compartment 182 storing at least one of a chemical substance configured to generate electricity to power the bio-medical implanted device (not shown); and one or more bio-fuel compartments 192, 194, and 196 configured to store at least one biofuel for generating on electrolyte to create a conductive path for electrons emitted by the electrodes (188 and 190). In one embodiment, the micro battery 180 further comprises a multipurpose compartment 202.

[0050] In one embodiment, the micro battery 180 further comprises at least one microprocessor 200 in communication with the biocompatible compartment 182 through a plurality of connectors 198 that interface with the bio-fuel compartments (192, 194, and 196) to control the communication between the computing device 176 (shown in FIG. 4) and the contact lens 190.

[0051] In some embodiments, the bio-fuel compartment 192 is included in the bio-membrane to recharge the micro battery 189 by itself from the blood stream. In this current process, the body heat is used as a power source for the micro battery 180 and further used as a power supply for the entire body. As the body temperature differs in different places of the body, the biocompatible compartment 182 of the micro battery 188 provides a power backup to maintain the constant power supply through the instruction of the processor 209 controlled by the computing device 176 via a software application.

[0052] In biofuel compartments, the power is generated by causing a chemical reaction at a controlled rate and by burning blood chemicals from blood cells of the animal or fowl body. The electrodes 294 of the blood fool compartments (192, 194, and 196) are coupled with flesh to create a conductive path for the electrons emitted by the electrodes 204 for operating the contact lens 190.

[0053] Referring to FIG. 7, a sectional view of a two-part mold with an upper section 148 and a lower section ISO used for molding the contact lens 109 in one embodiment is disclosed. In one embodiment, the upper section 148 and lower section ISO include guides such as an annular projection 152 on the upper section 148 and an annular recess 154 on the lower section 150, for insuring alignment. In one embodiment, the molding cavity is defined by molding surfaces (156 and 158) in the upper section ISO for the upper surfaces of the central optic portion 102 and peripheral bearing portion 104, respectively, and corresponding surfaces (169 and 162) on the lower section 148 for molding the lower surfaces of these lens portions.

[0054] The latter is rounded at its outer edge, as appears at 164, to produce a rounded margin in the lens. The surface 156 has a downward protuberance 166 through which extends a vertical passage or gate 168 for the supply of molten material. This gate 168 is shown to be open to the top of the mold section, but it should be understood that in molds having several molding cavities for forming a plurality of lenses simultaneously, the gates to these cavities would be connected by runners, as is understood in the molding art. The mold is further provided with means for exhausting air, e.g. four radial vent channels 179 milled in the tapper section ISO to a very shallow depth, for example, 0.0007 inches. It is evident that air could be vented in other ways, for example, about a vertically movable stripper pin, which may be provided at the center of the lower section 148 to eject the hardened lens from the mold. Such a stripper pin is well known in the art.

[0055] In molding, the material, for example, a thermoplastic resin is injected into the mold cavity through the gate 108 underpressure and displaced air flows out through a vent channel 170. This vent channel 170 is so fine that allows gas flow through it, thereby preventing flashing during the process. The mold sections (148 and ISO) are separated for removing the contact lens 100 after hardened, and breaking off of the ligament extending from the central depression 156 to the gate can be affected. In one embodiment, the central depression 110 is irregularly or unevenly molded by the protuberance 166 to introduce blurring at the optical axis. This is desirable in a distorting lens. The contact lens 100 is perfectly smooth save at the center of the outer surface.

[0056] In an exemplary embodiment, the diameter of the central optic portion 102 of the contact lens 100 for a chicken is about, but not limited to, 0.36 inches and diameter of the lens is about, but not limited to, 0.585″. In one embodiment, the maximum thickness of the central optic portion 102 is about, but not limited, 0.035″, radius of the outer surface of the central optic portion 102 is about, but not limited to, 0.200″, and the radius of the inner surface of the central optic portion 102 is about, but not limited to, 0.0185″. In an exemplary embodiment; the inclination of peripheral bearing portion 104 and angle from the upper surface to a base plane is about, but not limited to, 34 degrees. In one embodiment, the thickness of the peripheral bearing portion 104 adjacent to the central optic portion 102 is about, but not limited to, 0.025″ and the thickness at the margin is about, but not limited to, 0.015″. In one embodiment, the radius of the curvature at the outer margin is about, but not limited to, 0.031″ and the depth of the central depression is about, but not limited to, 0.015″. In one embodiment, the maximum diameter of the central depression is about, but not limited to, 0.031″.

[0057] Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. It should be understood that the illustrated embodiments are exemplary only and should not be taken as limiting the scope of the invention.

[0058] The foregoing description comprise illustrative embodiments of the present invention. Having thus described exemplary embodiments of the present invention, it should be noted by those skilled in the art that the within disclosures are exemplary only, and that various other alternatives, adaptations, and modifications may be made within the scope of the present invention. Merely listing or numbering the steps of a method in a certain order does not constitute any limitation on the order of the steps of that method. Many modifications and other embodiments of the invention will come to mind to one skilled in the art to which this invention pertains having the benefit of the teachings in the foregoing descriptions. Although specific terms may be employed herein, they are used only in generic and descriptive sense and not for purposes of limitation. Accordingly, the present invention is not limited to the specific embodiments illustrated herein.