MEMS: Comparison With Micro Electronics

MEMS: Comparison With Micro Electronics Micro Electro Mechanical Systems or MEMS is a term coined around 1989 by Prof. R. Howe and others to describe an emerging research, where mechanical elements, like cantilevers or membranes, had been manufactured at a scale more akin to microelectronics circuit than to lathe machining. But MEMS is not the only term used to describe this and from its multicultural origin it is also known as Micromachines, a term often used in Japan, or more broadly as Microsystem Technology (MST), in Europe. However, if the etymology of the word is more or less well known, the dictionaries are still mum about an exact definition. Actually, what could link an inkjet printer head, a video projector DLP system, a disposable bio-analysis chip and an airbag crash sensor yes, they are all MEMS, but what is MEMS? It appears that these devices share the presence of features below 100 micro metre that are not machined using standard machining but using other techniques globally called micro-fabrication technology. Of course, this simple definition would also include microelectronics, but there is a characteristic that electronic circuits do not share with MEMS. While electronic circuits are inherently solid and compact structures, MEMS have holes, cavity, channels, cantilevers, membranes, etc, and, in some way, imitate `mechanical parts. This has a direct impact on their manufacturing process. Actually, even when MEMS are based on silicon, microelectronics process needs to be adapted to cater for thicker layer deposition, deeper etching and to introduce special steps to free the mechanical structures. Then, many more MEMS are not based on silicon and can be manufactured in polymer, in glass, in quartz or even in metals [5, 6]. Thus, if similarities between MEMS and microelectronics exist, they now clearly are two distinct. Actually, MEMS needs a completely different set of mind, where next to electronics, mechanical and material knowledge plays a fundamental role. 1.2 MEMS technology The development of a MEMS component has a cost that should not be misevaluated but the technology has the possibility to bring unique benefits. The reasons that prompt the use of MEMS technology can be classified broadly in three classes: a) Miniaturization of existing devices, like for example the production of silicon based gyroscope which reduced existing devices weighting several kg and with a volume of 1000 cm3 to a chip of a few grams contained in a 0.5 cm3 package. b) Development of new devices based on principles that do not work at larger scale. A typical example is given by the biochips where electrical are use to pump the reactant around the chip. This so called electro-osmotic effect based on the existence of a drag force in the fluid works only in channels with dimension of a fraction of one mm, that is, at micro-scale. c) Development of new tools to interact with the micro-world. In 1986 H. Rohrer and G. Binnig at IBM were awarded the Nobel price in physics for their work on scanning tunneling microscope. This work heralded the development of a new class of microscopes (atomic force microscope, scanning near optical microscope) that shares the presence of micro machined sharp micro-tips with radius below 50 nm. This micro-tool was used to position atoms in complex arrangement, writing Chinese character or helping verify some prediction of quantum mechanics. Another example of this class of MEMS devices at a slightly larger scale would be the development of micro-grippers to handle cells for analysis. 2.Micromirrors 2.1 History of Micromirror : In recent years, deformable mirror devices (DMDs) have emerged as a new micro-electromechanical (MEM) technology with tremendous potential for future applications. As shown in Fig. 1-1, the concept of deformable mirrors was developed and utilized as early as 211 BC by Greek soldiers to destroy enemy ships [1]. 1 However, it was not until 1973 that serious development of micromirror devices began to emerge. Currently, several designs of deformable mirrors have been fabricated, some before a practical use had been identified. It is these devices that are now receiving serious attention as optical communication and related fields are expanding. 2.2 BACKGROUND Mirror devices are a specific type of spatial light modulator (SLM).Spatial light modulators are devices that can alter the phase, amplitude, and/or the direction of propagation of an incident beam of light. Deformable mirror devices do this by moving a reflective surface to achieve the desired effect. Currently, two distinct types of micro-mirrors are used [1]. Continuous surface devices use one large reflective membrane that is locally controlled by individual actuators to form a continuous reflective surface. Circus fun house mirrors are an example of such a device. Segmented devices, on the other hand, use a mirror surface that is divided into numerous individually controllable smaller mirrors. Greek soldiers used segmented mirrors to form a parabolic reflective surface which was used to focus sunlight onto enemy ships. 2 Segmented devices are used today in the formation of large parabolic mirrors. As shown in Figure 1-2, the primary mirror of many modern optical telescope systems is comprised of segmented deformable mirrors. In the past, the size-limiting factor in such systems has been the size of the primary mirror which had to be mechanically stable yet light enough to move to various positions throughout a full field of view. Larger mirrors were frequently damaged or caused damage to other components of the telescope when movement was attempted. With the application of segmented deformable mirror technology, the practical limit in telescopic primary mirror size can be extended since much lighter and smaller mirrors can be individually anchored, controlled, and placed adjacent to each other to form the necessary parabolic mirror. The segmented mirrors are not only placed at a slight angle to each other, but are shaped by the segmented actuators and are free to bend to form smaller parabolically curved surfaces. The segmented actuators are manipulated by the control electronics which receive information from the laser figure sensor and the edge computer which is then translated into a necessary change in the position or shape of the mirrors. These monitoring devices continually check the status of the segmented mirrors to maintain the parabolic form of the entire device and to ensure that no gaps or severe discontinuities are present in the surface of the primary mirror which would result in a distorted image or a loss in image resolution. The basic principles of this macroscopic technology can also be used in microscopic applications which involve fabricating deformable mirrors on integrated circuits. Several forms of micromirrors have emerged that combine on-chip addressing electronics with the micro-mechanical mirrors [1]. The geometric and material variations of these devices demonstrate that deformable mirrors can be designed and implemented for a variety of specific uses. The micromirror devices currently used are segmented surface devices in which the actuation of a small reflective mirror is controlled by a single address electrode. The metallized mirror and the address electrode of the device form a parallel plate capacitor. The voltage between the mirror and the electrode creates an electrostatic force acting on the mirror in the downward direction. The flexures holding the mirror are designed to deform, allowing the mirror to move vertically with applied voltage. The resulting spring force of the flexures ac ts on the mirror in the upward direction, countering the electrostatic force of the capacitor. 3.MICROMIRROR ACTUATION METHODS FOR SENSING 3.1 Electromagnetic Actuation: A micromirror can be deflected in two ways by electromagnetic actuation. First, by using Lorentz force to move a patterned coil by exerting external magnetic field. Second, by repulsive/attractive forces to repel/attract the magnetic material attached to the mirror from/to the actuator. Advances in material fabrication to provide thick film deposition of magnetic material on the surface of micro actuators should reduce voltage and current requirements. Magnetic MEMS can offer non- contact operation, and can induce mechanical resonance by magnetic element excitation. However, thermal budget imposed by the current CMOS technology limits the fabrication of the magnetic film on the substrate from reaching the desired characteristics [3]. 3.2 Piezoelectric Actuation: The piezoelectric actuation takes advantage of the corresponding physical deformation to applied electrical voltage property . It has relatively lower operation voltage (3-20 Volt DC) with low power consumption, better linearity, and fast switching time 0.1 to 1.0 milliseconds [3]. 3.3 Thermal Actuation: The main advantage of thermal actuation is the simplicity of the fabrication method. However, in general, thermal actuation tends to have higher power consumption and slow response time. The out-of-plane thermal micro actuator uses thermal expansion due to ohmic heating. A thin arm and wide arm configuration with one end fixed to the substrate has nonlinear property due to temperature dependency . 3.4 Electrostatic Actuation: Despite suffering from the pull-in effect, nonlinear behavior, and higher operating voltage, the electrostatic actuations fast response time (less than 0.1 ms), low power consumption, and the easiness of integration and testing with electrical control system make the electrostatic actuation one of the preferred choices for micromirror actuation . The operation voltage of the micromirror can be lowered while achieving more angular deflection if the stiffness of torsion bar is reduced. However, when the stiffness is lowered, the natural frequency of the micromirror also decreases, thereby reducing operational bandwidth. Say w, v, d scales as L1. Maximum Electrostatic Potential Energy Stored is given by: 3 Permitivity of vacuum and relative permitivity remains unchanged with scaling. Assume Vb scales linearly with d (Out of Paschen effect range), then 4 Electrostatic Forces Found to Scale as Square of L. Since mass and hence inertial forces scale as cube of L, Electrostatic Actuators are advantageous in Scaled Down Sizes [3]. Paschen Effect: Breakdown of continuum theory Figure 3 -Vb v/s P,d Paschen Effect: Breakdown of continuum theory: a) Vb scales non linearly in Paschen effect range. b) Vb increases in Paschen effect range. c) Higher Vb implies higher storage of energy and so larger force. 4.Summary of Advantages and Disadvantages of Each Actuation Mechanism Actuation Advantages Disadvantages Magnetic Low actuation voltage Relatively large angular deflection with lower driving power Difficult to assemble permanent magnets and coils with current CMOS technology Challenge in minimizing the size of device Piezoelectric Higher switching speed Low power consumption Short actuation range Thermal Ease of fabrication (require only one composite beam) for bulk production -High power consumption Slow response time Fatigue due to thermal cycle Electrostatic Low power consumption Fast switching Ease of integration and testing with electrical control circuitry Nonlinear characteristics Limited by the pull-in effect High actuation voltage Fabrication complexity 5.Proposed Designs 5.1 ANALYTICAL MODEL OF THE STACKED MICROMIRRORS In this section, micromirrors of different configurations are presented and compared in terms of their deflection angle and actuation voltage. The conceptual schematics of the three configurations analyzed are shown below. Figure 1(a) shows a conventional micromirror configuration. Figure 1(b) shows a unique configuration of the stacked micromirror also denoted as the first stacked mirror configuration, and Figure 1(c) shows a novel configuration of the stacked micromirror with an offset, which is also known as the second stacked micromirror configuration [8]. Figure 1. Schematics of Three Different Micromirror Configurations. The moving electrode (middle plate) in the stacked configurations is designed to be identical to the micromirror in size and material. Solutions for the following analytical model are independent of the shape and size of the plate (micromirror) as long as the dimensions of each layer are identical. First, an analytical model of the micromirror is derived to better understand the relationship between each parameter of the micromirror. The torque created by the electrostatic force between the micromirror and its electrodes, as denoted by M for each configuration, is derived from the following dynamic Equation (1): I (d2O/dt2) + C (dO/dt) + kO = M -(1) where, I is the moment of the inertia. C is the damping coefficient representing the squeeze-film. k is the torsional stiffness of the rotated serpentine spring. M is the torque created by the electrostatic force between the micromirror and its electrodes. The moment of the inertia of the micromirror along the y-axis is equal to (1/12)*ml2. Second, the value for damping coefficient, c, representing the squeeze-film damping of the micromirror is derived from the linearized Reynolds equation [13] and presented in Equation (2). C= -(48w3)/(à Ã¢â€š ¬6(b2+4)D3) (2) where, ÃŽÂ ¼ is the dynamic viscosity of the air. l is equal to the half length of the micromirror, . w is the width of the micromirror. b is the ratio of the width to the length of the micromirror. D is the initial air gap between the micromirror and its electrodes. Third, the torsional stiffness, k, of the rotated serpentine spring K= (G Jp)/(2NLp+3Lp) (3) where, G is the shear modulus of the material used in the rotated serpentine spring. Jp is the torsion factor of a beam with rectangular cross-section [14] and can be derived from the Equation (4) below. N is the number of the loops or turns in the rotated serpentine spring. Lp is the length of the rotated serpentine spring segment that is parallel to the rotation axis. Jp= (tw3/3)*(1-(192w/3t)*à ¢Ã‹â€ Ã¢â‚¬Ëœt=1,2,3.1/t3* tanh(tà Ã¢â€š ¬t/2w)) (4) Fourth, for the sake of simplicity, the micromirror is considered to be a rigid body and the deflection of the rotated serpentine spring in the Z axis is assumed to be negligible. In order to find the torque created by the electrostatic force between the micromirror and its electrodes, the parallel plate capacitor theory is used to derive the differential force that acts on a small segment of the micromirror and its electrodes: dF = 1à ¢Ã¢â‚¬Å¾Ã‚ ®V2 (wdx)/(D-x2 -(5) where, à ¢Ã¢â‚¬Å¾Ã‚ ® denotes the permittivity of air and V represents the potential difference. The torque, M, for each configuration is simplified with the normalized angle as represented by the following Equation (6), (7) and (8): MO = 0.5 à ¢Ã¢â‚¬Å¾Ã‚ ®wV2 (L2/D2 o2)*(o/1-o + ln(1-o)) (6) M1 = 0.5 à ¢Ã¢â‚¬Å¾Ã‚ ®wV2 (L2/D2 4o2)*(2o/1-2o + ln(1-2o)) (7) M2 = 0.5 à ¢Ã¢â‚¬Å¾Ã‚ ®wV2 (L2/D2 2)*(1/(1-2o+o2)) (8) where, M0 represents the torque created in the single mirror configuration. M1 and M2 denote the torque generated in the first and second stacked mirror configurations, respectively. To simplify the analysis, the fixed bottom electrodes are not used to actuate the micromirrors in both stacked configurations [8]. Figure-2. Torque versus Angle Comparison Plot for Three Micromirror Configurations. To visualize the magnitude of torques against the normalized angles, the normalized torques of M0, M1, and M2 are plotted in the Figure 2. The red line shows an exponential increase in the normalized torque as the normalized angle grows. The black line (conventional single mirror configuration) shows relatively gradual increase. As expected, while the deflection angle is small there are negligible differences between the three configurations in terms of the torque created by the same actuation voltage. However, as the deflection angle increases, the torque acting on the first stacked mirror grows exponentially. On the other hand, the second stacked mirror configuration shows a 50% increase in torque when compared to the single mirror configuration. 5.2 GEOMETRY The size and geometry of the micromirror are determined by the diameter of the optical beam as well as its application. For example, a micromirror used in an endoscope would require a smaller form factor. The micromirror discussed here is designed to be 1 mm in length, 1 mm in width and 10 ÃŽÂ ¼m in thickness. Also, it is assumed to be made of polysilicon that has a Youngs modulus of 160 GPa, Poissons ratio of 0.22 and density of 2330 kg/m3. Normally, the micromirror is designed to be suspended over a cavity by two torsion bars. Even though a straight torsion bar is simple to design and fabricate, it suffers from residual stress, which alters the stiffness of a torsion bar and the micromirrors frequency response. Furthermore, modification of the physical or geometric properties of the straight torsion bar is not straightforward since the geometry of the torsion bar such as the width and thickness are limited by the fabrication process. Hence, two rotated serpentine springs are chosen to hold the micromirror in place while the micromirror rotates. The serpentine springs stiffness can be easily customized regardless of the fabrication process. Thus, a rotated serpentine spring is employed in this analysis. The rotated serpentine spring used in this analysis is 4 ÃŽÂ ¼m wide, 10 ÃŽÂ ¼m thick, and 100 ÃŽÂ ¼m in length from one end to another end. The gap between each turn is 4 ÃŽÂ ¼m. Figure.3 (a) shows the expanded view of the rotated serpentine spring, and Figure.3 (b) shows the relative size and location of the spring on the micromirror. Figure 3. (a) Rotated Serpentine Spring Torsion Bar and (b) the Micromirror. Two different configurations of the micromirror are presented in Figure 4. To simplify modeling and analysis, the geometry and material of the plates (micromirrors) are kept identical except the stacking configuration. As shown in Figure 4(a), a micromirror is placed 250 ÃŽÂ ¼m directly above another square plate along the z-axis. In Figure 4(b), a micromirror is placed above another mirror with a 250 ÃŽÂ ¼m gap in the z axis and a 500 ÃŽÂ ¼m offset along the x- axis. The top plate is the micromirror, and the bottom plate is used as moving electrodes [8]. The micromirror and its moving counterpart have two electrodes located on their bottom. The electrodes are assumed to be made of 1 ÃŽÂ ¼m aluminium thin film. The rotated serpentine springs provide electrical connection between the electrodes and control circuitry. Figure-4. Stacked Micromirror Configurations. 5.3 Flexure Beam Micro-Mirror C:UsersAjiteshDesktopUntitled1.jpg C:UsersAjiteshDesktopUntitled.jpg Figure-5: Flexure Beam Micromirror APPROACH In order to develop the characteristic model of the Flexure-Beam micromirror device, it must first be characterized by equating the electrostatic actuation force of the parallel plate capacitor with the mechanical restoring force of the spring. Figure-6 shows a Flexure-Beam device in the resting ( V = 0 ) and active ( V > 0 ) modes where Zm represents the vertical height of the mirror above the address electrode. It is initially assumed that when no electrode potential is applied, the mirror rests firmly in the resting position, Z0, where the deflection distance, d, at all points on the mirror is zero [1]. Figure-6: Forces acting in flexure Beam Micromirror The Flexure-Beam device is a phase-only device since the direction of motion of the mirror is orthogonal to the reflective surface. Therefore, the optical path length can be altered while the direction of propagation remains unchanged. This makes the piston device very appealing for phase modulated filters or for adaptive phase correcting optics. Figure-7: Cloverleaf Micromirror One design improvement is another cantilever device known as the Cloverleaf. As shown in Figure, the flexures holding the reflective surfaces are placed in the center of the geometry. This takes the basic design of the Inverted Cloverleaf and reduces some of the negative effects observed. Also, the electrodes are located directly beneath each mirror which allows the cantilever surfaces to be individually addressable. Moving the support for the mirrors to the center of the pixel cell allows for better use of overall space. Now, the pixels can be placed so that adjacent cells nearly touch each other with only a small gap required between the mirrors of one cell and the mirrors of another. Most of the total surface area of the device is reserved for the active elements with the exception of the posts which hold the mirrors in place. This increases the active area of the device to as much as 86% which is similar to the remaining devices described in this chapter. This device, however, maintains the side effect of redirecting an incident beam of light in four distinct directions. C:UsersAjiteshDesktopUntitled3.png Figure-8 The Quad-Cantilever deformable micromirror device The significant advantage over the Cloverleaf devices is that the mirrors are aligned so that the redirection of the incident beam of light is in a common direction. This allows the device to be capable of switching or redirecting the incident light with little loss in amplitude. One characteristic similar to the Inverted Cloverleaf and Cloverleaf devices is the slanted behavior of the deflected mirror. This behavior is typical with cantilever devices and creates a non-uniform phase response across the surface of each mirror [1]. ELECTROSTATIC FORCE In order to compute the electrostatic force on the mirror, it must first be determined by which means this force will be calculated. More specifically, it must be decided whether the charge distribution, which is not uniform over the mirror surface, will be considered. The charge distribution will change with the position of the mirror surface and will also be altered by any mirror surface deformations or discontinuities such as etch holes. This leads to a complicated solution when integrating across the mirror. As an alternative, since both the charge distribution of the mirror and the applied electrode voltage are related to the electric field within the device, it is possible to express the potential energy, of the electric charge distribution solely in terms of this field: C:UsersAjiteshDesktopUntitled4.jpg Where, a is the surface charge distribution on the mirror, V is the actuation voltage between the mirror and address electrode, A is the area of the mirror, e0 is the free space dielectric constant and E is the electric field intensity at any point in the volume v within the device . By assigning an electric energy density of V-2coloumbs to each point in space within the device, the physical effect of the charge distribution on the mirror surface is preserved. From this approach it is easy to see that the non-uniform charge distribution on the mirror surface and the fringing effects of electric fields around the edges of the mirror are complementary descriptions of the same electrical phenomenon. 5.4 Dual Axis Micro-Mirror Figure-9: Dual-Axis micromirror Micromirror working principle The micromirror is made up by a circular polysilicon micromirror plate that is connected to a gimbal frame by a pair of polysilicon torsion springs (Fig. 9). The gimbal frame is supported by a pairs of polysilicon springs too. The structure is a dual axis micromirror: the slow axis works at the resonance frequency of 300 Hz while the fast axis works at the resonance frequency of 30 kHz. The fast axis allows the micromirror to be tilted around y direction while the slow axis allows the micromirror to be tilted around x direction. Both the two axis are actuated by electrostatic vertical comb drives. Vertical comb drives provide a motion in and out of the plane and present several advantages if compared to lateral comb drives. First of all, they generate a vertical force larger than lateral comb drives ,then they achieve larger scan angle at high resonance frequencies and finally they directly apply the torque to the micromirror without needing any hinges to couple their linear motion i nto torsional micromirror motion [4]. Each vertical comb drive consists of a set of moving mechanical polysilicon electrodes and a set of rigid electrodes suspended over an etched pit. The rigid electrodes are bound to the substrate, while the movable electrodes are linked to the axis. When a voltage is applied between the fixed fingers and the movable fingers, an electrostatic Torque arises between the two electrodes [4]. Consequently the movable fingers rotate around the torsional axis until the Electrostatic Torque (Te) and the Mechanical restoring Torque (Tm) of the springs are equal. These two torques can be expressed by (1) and (2). C:UsersAjiteshDesktopUntitled5.jpg C:UsersAjiteshDesktopUntitled 6.jpg Figure-10: Forces acting in a Dual-Axis Micromirror 5.5 Micromirror with Hidden Vertical Comb Drives The actuators and the torsion springs are hidden underneath the mirror to achieve high-fill factor in micromirror arrays. In this case, the fringing capacitance is significant and cannot be ignored [2]. The total capacitance as a function of angle can be calculated by integrating over the finger length. Fig. 11 shows the 3-D design of this: C:UsersAjiteshDesktopUntitled7.png Figure-11: Hidden Vertical-Comb Drive Micromirror 6.CONCLUSION: In this report, the first three phase of the project have been completed. The different actuation principles , their advantages and disadvantages have been discussed. Also four designs have been proposed and analytical study of them has been done. We can now move on to the next phase which comprises of modeling as well as analysis of the designs chosen.

Sales and Iventory

Online Sales and Inventory System For Marikina Shoe Exchange An Undergraduate Research Proposal Presented to The Computer Studies Department College of Science De La Salle University – Dasmarinas In Partial Fulfillement of the Requirement for the Degree of Bachelor of Science in Information Technology Inah Denise A. Almera John Florence M. Delimos Patrick P. Lozano September 2010 CHAPTER 1 INTRODUCTION 1. Background of the Study All things changes as the world progress on time. Man starts to fulfill their work from scratch and as generations have pass, man uses alternative to lessen the aggrevation of work One of these alternatives is technology which is evident in the enormous society. At present time, business establishments wants to seek the use of technology as a tool in incrementing sales and productivity. One of these companies is the Marikina Shoe Exchange. Marikina Shoe Exchange (MSE) is a group of companies selling footwear, apparel, body care, and household products. Most products sold by the company is Philippine made. This company is a family-owned Filipino corporation, owned by the Jardiolin family. MSE engages in direct selling. Natasha, Confetti, Xxtra, Vivacci, Gabrio Franco, and Shoe Studio are its sister companies. MSE’s history shows that it is deeply rooted on it’s sister companies timeline. 1984 marks the opening of the Confetti (named after the events of the EDSA revolution where confetti rains throughout the streets) Greenbelt branch and soon it blossoms around 1987 to 1990 where there is a notable rapid expansion of the said company. One of the company’s peak happens when they open another branch at the SM Megamall during 1989. In 1990, Natasha starts as a retail operation in Robinsons Galleria. Following that year till 1993 engraves the start of the Natasha Department Store outlets in Cinderella stores as well as in Landmark. In April 18, 1994, the group of companies launch its direct-selling marketing plan which is later revised from 1996 to 1997 to a new edge plan which is still used till present. The opening of the first MSE branch which is in Tutuban happens on September 1999. At present, MSE has thirteen branches which includes Tutuban, Dagupan, Alabang, Cubao, Davao, Cebu, Taft Avenue, Bacolod, Isabela, Cagayan de Oro, Starmall Mandaluyong, Pampangga and Imus, which is the location of our study. Although MSE has no mission and vision , it believes that they owe its success most of all to its adherence to its core values, namely customer service, discipline, constant improvement, respect for each other and honesty. MSE is still using its manual system on their transactions that cannot provide the securing and recording of daily transactions, the ability to provide an organized sales reports and the ability to keep track of the inventory, which would be somehow lessen the workload and the ability to keep track of the inventory, which would be somehow lessen the workload of the workers. And because of these problems manual system is very difficult to address. This study aims to dispell these problems by applying modern paradigm and methodologies to solve it and relate these systems synchronously. 2. Statement of the Research Problem MSE being a direct selling company encounters several problems. These problems are: Low Security of Files. There are chances of possibly loosing to data due to absence of citing the access levels in viewing and modifying data. Almost all elements are manually encoded including resultant values from computations. Unable to Monitor Products Thorougly. There are present ncertainties in the system such as assesing the supply if it exceed or is lower number of stocks. Without overseeing the quantity, updating the stocks from the supplier will have a delay which will eventually might run out and could lead to out of stock or phase out. Lackadaisical Report Generation. With the existing system, report generation is manual, resulting in unreliab ility or uncertainties in the reports. Reports needed to other succeeding documentations will have a pending state till the reports are finished eventhough there are chances that is overdue in the required time. 1. 3 Statement of Objectives . 3. 1 General Objectives To develop an Online Sales and Inventory System for Marikina Shoe Exchange. 1. 3. 2 Specific Objectives 1. To analyze and determine the problems and the factorsof the existing system through the use of data flow diagrams. 2. To gather every detail and information required to make the system. 3. To make a system that will catch the the attention and interest of the user. 4. To make meaningful functionalities and features which are user-friendly. 5. To train the users particularly the assigned personnel on how to use the system at ease. 6. To create a database that will store significant datas in online ordering and as well as the inventory. 4. Significance of the Study This study will provide some merits to certain group of individuals. Some who will benefit the study are: Company. By this study, the gap between the customers and the company be shorten, increasing the incoming orders as well as the company’s productivity over time. They can also promote their products everywhere and everytime. Employee. Employees will have lesser work in maintaining their inventory as all orders description and others details are stored in the database. They can easily monitor all incoming orders as well as their remaining stocks and can minimize the cost of receipt generation. Customer. Through this study, the customer will be ensured with convenience in ordering their desired products, as well as being updated to the latest releases of trends and the recent promos, can pay through the net and get their orders on their doorsteps. Proponents. The proponent can have a wider understanding about how does processes in a system cycle throughout the supplier-business-customer relationship. They can also gain knowledge on strategic decisions on how to handle problems encountered by the company and how to formulate the proper solutions. Future Researchers. The future researchers will have ample ideas on how to deal problems in their researches especially those who will have the same topic. Using this research as a guideline, it can aid them in documentations and how to interrelate each concepts to mend the milestones of each activity. 1. 5 Scope and Limitations of the Study Front End. The front-end part of the system is the website which will be seen or used by the customers. The proponents will create a user friendly Website for Marikina Shoe Exchange that will enable users to view and order products online. Through this site, customers will be able register, view products, and receive notifications regarding new promos, and order products online. The Website will be updated regularly to provide excellent customer service. Back End. To make the inventory process of the company easier, the proposed system will include a database system that will lessen the errors made by manual inventory checking. The employee will simply input the number of stocks at hand. If the quantity of a certain product is below the normal level of the number of stocks, the employee will be notified to ensure that they have a good amount of stocks for a certain product. The proposed system will also provide security; only authorized employees will be able to check the database to avoid the risk of other people accessing the inventory files. Maintenance. The proponents will provide a certain device that will serve as the back-up of the proposed system. The said system will also be easy to maintain; all required information is stored in one database. Delivery. Delivery rates will depend on how far the customer is located and will also depend on the total amount of the customers’ ordered products. Mode of Payment. Since the customers ordered online, payment will be made through credit card. Registered customers will be asked to provide a credit card line and number to be able to order products online. This mode of payment is guaranteed on its convenience. 6. Methodology of the Study [pic] One way to reduce cycle time is to use phased development. The system is designed so that it can be delivered in pieces, enabling the users to have some functionality while the rest is being developed. Thus, there are usually two systems functioning in parallel: the production system and the development system. The operational or production sytem is the one currently being used by the customer and user; the development system is the next version that is being prepared to replace the current production system. Often, we refer to the systems in terms of their release numbers: the developers build Release 1, test it, and turn it over the users as the first operational release. Then, as the users use Release 1, the developers are building Release 2. Thus, the developers are always working on Release n + 1 while Release n is operational. There are many ways for the developers to decide how to organize development into releases. The two most popular approaches are incremental development and iterative development. In incremental development, the system as specified in the requirements documents is partitioned into subsystems by functionality. The releases are defined by beginning with one small, functional subsystem and then adding functionality with each new release. However, iterative development delivers a full system at the very beginning and then changes the fuctionality of each subsystem with each new release.

Online BSN Degree Forensic Pediatric Nurses Protect Human Rights of Children 2019

Forensic nurses act as a vital link between medicine and law in the criminal justice system. Cases involving elder abuse, child neglect, gun shot wounds, and sexual abuse may all be investigated by forensic nurses. Some nurses are now choosing to earn an online BSN degree to become better qualified to work with childrens human rights issues as a Forensic Pediatric Nurse. What is a Forensic Pediatric Nurse? Forensic Pediatric Nurses care for and investigate cases involving children. A Forensic Pediatric Nurse is charged with the protection of the human rights of children. In order to specialize in this type of work, a Forensic Pediatric Nurse is often a graduate with an online BSN degree. What does a Forensic Pediatric Nurse investigate? Human rights issues most commonly encountered by Forensic Pediatric Nurses include child abuse, neglect, and exploitation. Examples of the duties performed by a Forensic Pediatric Nurse are administering a pelvic exam to a suspected victim of child molestation or investigating the circumstances surrounding an unexpected infant death. Online BSN degree graduates who work as Forensic Pediatric Nurses typically are employed in pediatric departments of hospitals, others enter into private practice. .u36fc32eed1a7529ee8c0f6e9b90559fb { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; box-shadow: 0 1px 2px rgba(0, 0, 0, 0.17); -moz-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.17); -o-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.17); -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.17); text-decoration:none; } .u36fc32eed1a7529ee8c0f6e9b90559fb:active, .u36fc32eed1a7529ee8c0f6e9b90559fb:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u36fc32eed1a7529ee8c0f6e9b90559fb { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u36fc32eed1a7529ee8c0f6e9b90559fb .ctaText { font-weight:bold; color:inherit; text-decoration:none; font-size: 16px; } .u36fc32eed1a7529ee8c0f6e9b90559fb .post Title { color:#000000; text-decoration: underline!important; font-size: 16px; } .u36fc32eed1a7529ee8c0f6e9b90559fb:hover .postTitle { text-decoration: underline!important; } READ The Health Care School of HawaiiRequired Education to Become a Forensic Pediatric Nurse Forensic Pediatric Nurses must be licensed as Registered Nurses in the U.S. Licensure may be obtained through a hospital diploma, associate degree, or campus or online BSN degree program. BSN schools, such as Kaplan University, offer a Forensic Nursing Certificate Program that provides essential training in forensic sciences. Kaplans bachelor of science nursing online program also offers students the opportunity to pursue a specialty within the field of nursing, such as pediatric nursing. Prospective students who are interested in more information about a career as a Forensic Pediatric Nurse may visit the International Association of Forensic Nurses website. Related ArticlesOnline RN to BSN Program Forensic Psychiatric Nurses Serve a Vital Role in the Criminal Justice SystemBachelor Degree Nursing Online Program Forensic Corrections Nurses Provide Needed Treatment to InmatesAccelerated BSN Program Forensic Geriatric Nurses Investigate Cases of Elder AbuseBachelor of Science Nursing Specialty Sexual Assault Nurse Examiners Care for Victims and Investigate CrimeEducational Psychology Academic-Minded Psychology Students Wanted in the Field of Educational PsychologyBachelor Degree Nursing Specialties Forensic Nurse Investigators Apply Medical Knowledge to Crime Scenes .u78316d9ab88978806beb92d5a5b15983 { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; box-shadow: 0 1px 2px rgba(0, 0, 0, 0.17); -moz-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.17); -o-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.17); -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.17); text-decoration:none; } .u78316d9ab88978806beb92d5a5b15983:active, .u78316d9ab88978806beb92d5a5b15983:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u78316d9ab88978806beb92d5a5b15983 { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u78316d9ab88978806beb92d5a5b15983 .ctaText { font-weight:bold; color:inherit; text-decoration:none; font-size: 16px; } .u78316d9ab88978806beb92d5a5b15983 .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .u78316d9ab88978806beb92d5a5b15983:hover .postTitle { text-decoration: underline!important; } READ The IT Security Industry

Usf Contemporary Art Museum Visit Museum - 1537 Words

USF Contemporary Art Museum : Visit Artwork Analysis Admission: FREE, but USF parking permits are required and available in the CAM parking lot. â€Å"Untitled #4† was created by Larry Bell in 1974. This artwork is found in USF Contemporary Art Museum in Tampa, Florida. It stands 84 x 42 inches tall. This is a series of five color screen print with flocking. This piece is a screen print painting. When I look at this work I saw a print of a nude distorted woman posing. The perception is manipulated to look like she is coming out of her body or maybe reflecting in a spiritual state. Its silkscreen and thick pink flocking looks like it was made of glitter but I looked closer I can tell it’s just an illusion created by velvet- like material called flocking. It’s 2-D art, but it’s like the carnival â€Å"funhouse† mirrors, distorting the reflection image. The median and tools are screen print. The technique used to create the artwork is a new style called â€Å"Finish Fetish†, which are high glossed polish and velvet surfaces. This was a reflection of Los Angeles aesthetic of Hollywood and technology. Larry Bell used a motorized camera that can photograph at 360 degrees. By using this camera, he achieved distortion by the movement of his camera with opened shutters. This enhances the â€Å"funhouse effect† of the nude women. The silkscreen and thick pink flocking gave it a hint of the sixties psychedelic feel. Evaluating this image, the form or organization of this art is the camera