Wheelchair Interfaces for Paralyzed Persons

Wheelchair Interfaces for Paralyzed Persons New method suggest some improvements regarding muscles to drive a wheelchair. People with disabilities such as Parkinsons disease, multiple sclerosis or tetraplegia experience problems while using traditional wheelchair-integrated joystick due to deformities of their limbs, amputees, tremor or because the are paralyzed below the neck. For them, different methods to use wheelchair have been invented. Among them, the most popular are voice command, brain command, eye tracking, face tracking and tongue tracking. In this project, the main emphasis is put on interfaces based on eye-tracking, head gestures and users habits. The eye methods are effective, but distracts patients view. The physiological background of Electro-Oculography is well understood among different eye movement research methods. Therefore, the report regarding this project is chosen to be described. voice command is too sensitive for the background noise, but has works quite fast. Tongue tracking is inconvenient, but less than eye tracking. Face tracking is sensitive for skin color, but quite efficient. Brain command is very successful, but difficult to adjust. 2.1. Eye-computer interfaces The authors of [1] present an electrooculography (EOG) based wheelchair interface. Beyond simple path guiding, this device has three other features: path re-routing, obstacle sensing and avoidance, and tilt detection. It is also worth nothing that the microcontroller is used in the wheelchair system instead of a laptop computer. Electrooculography is a bio-medical technique used for eye movements observations. It measures the resting potential of the retina. This potential comes from the fact that eye acts a dipole: it has a positive charge on the cornea (the front part of the eye) and a negative charge on the retina (the rear part of the eye). The measurements are conducted with electrodes applied onto the face skin. More important is the location of the electrodes which depends on the eye movements. If the patients gaze is in the horizontal direction, the electrodes have to be placed near the lateral canthi of both eyes. On the other hand, if eye movements are expected to vary in a vertical direction, then the electrodes have to be placed above and below the eye. Figure 2.1Electro-Oculography method It is particularly interesting that the constructors applied additional ultrasonic sensors into the wheelchair. These sensors, placed on the wheelchair body, send signal to detect obstacle and then receive the reflected wave. This back signal helps the microcontroller to choose the best path. The researchers designed the interface in that way that gaze directions like left, right, forward or back correspond with internationally understood directions like north, west, east and south. No pulse means centre. The microcontroller of so called User Instructions Processor (UIP) encodes upcoming signals in order drive to in a certain direction or to avoid collision with an obstacle. Finally, the tilt detection algorithm is realized by the gyroscope applied to Drive Control Module. It informs UIP about possible danger associated with breaking safe tilt limit, predefined for wheelchair. In this case, corrective measures is done by the user or the alert to the patients doctor/nurse is sent. 2.2. Head Gesture Recognition This method, described in [2], allows to obtain images of humans head in order to process them for certain commands. The equipment used for this application is called Gesture Cam. It is a Smart Camera which was modified with embedding a processing unit. This modification allows the device to process images at the high resolution. Moreover, due to this condition, the only mage feature that has to be processed, is the output of the camera. GestureCam is based on Field-Programmable Gate Array (FPGA) which is supposed to process data from intensive video faster in real time than a traditional Personal Computer. Firstly, the authors took the video of the user. After that, they used Viola-Jones method in order to detect users faces. Figure 2.2 Viola-Jones method used for detecting nose. Figure 2.3Viola-Jones method used for detecting eyes 2.3. Anticipative Shared Control The researchers and at the same time the authors of presented a wheelchair navigation interface which enables the user to move from one room to another into an indoor place. The control over this interface is shared between the user and the computer. Therefore, it is called Anticipative Shared Control and the system POMDP (stands for Partially Observable Markov Decision Process). The main impact of the computer is that it uses data based on human habits, visited paths, time of the day etc. On the other hand, user can decide whether he/she wants to choose particular path, suggested by the interface or change settings. The main purpose of these operations is to complete users intentions and expectations as full as possible without increasing effort while operating the wheelchair. Tha advantage of that solution is that the wheelchair can take the user for longer trip without requiring more gestures. The authors notice that using interactive interfaces like eye-tracking or Electromyography (EMG) may be tiring for the human. The proposed design of the wheelchair interface is to use make fusion of head gestures and eye-tracking and to add more functions like winking, baring teeth, raising eyebrows or In this report various wheelchair interfaces were presented. The aim of their design is to improve life of persons who suffer from diseases causing. As far as eye-tracking is considered, many papers regarding eye-tracking systems were published. Generally, the advantage of eye-tracking over voice command is that eye can send accurate visible signal, for example, by gazing in certain direction. It is worth noting that eye-tracking method, described in , is very reliable. Moreover, it is simple to use in various applications. Because of the straightforward gaze detection, it is very reliable, accurate and, based on previous research, quite economic. The use of microcontroller reduces time of complex calculations, provides enough high level of intelligence and unweights the wheelchair because of replacing a laptop computer. The head gesture interface is quite effective and economic. However, it faces different ambiance conditions (such as changes in illumination or various objects in the background) as well as users appearance (face complexion, or glasses). [1] R. T. Bankar and Dr. S. S. Salankar, Head Gesture Recognition System Using Gesture Cam, in Fifth International Conference on Communication Systems and Network Technologies, Gwalior, India, 2015. [2] P. Pinheiro, E. Cardozo and C. Pinheiro, Anticipative Shared Control for Robotic Wheelchairs Used by People with Disabilities, in IEEE International Conference on Autonomous Robot Systems and Competitions, Vila Real, Portugal, 2015. [3] T. R. Pingali, S. Dubey, A. Shivaprasad, A. Varshney, S. Ravishankar, G. R. Pingali, N. K. Polisetty, N. Manjunath and Dr. K. V. Padmaja, Eye-Gesture Controlled Intelligent Wheelchair using Electro-Oculography, in IEEE International Symposium on Circuits and Systems (ISCAS), Melbourne, Australia, 2014.

Interviewing a Criminal Justice Professional

For the past twenty-four years, Deputy Karen J. Miller has work for the Harris County Sherriff’s Department. She worked on the beat for her first six months, than the rest of her career years at the Harris County Sherriff’s Community Store Front. The store front is a place where the deputies provide a safe environment for those who live, work or commute within the precincts.For the last three years, Deputy Miller’s job title has been â€Å"Media Liaison† officer. The role of a police liaison officer is to promote trust and understanding by assisting the community, police and media through the process of reducing and preventing crimes and maintaining community partnerships. She also strives to divert people from entering the criminal justice system. Deputy Miller is responsible for making consistent, periodic contact with assigned groups to stay informed about community concerns and unresolved issues.Her goal is to provide accurate information in a timely m anner utilizing technology to improve communication between the office of the sheriff’s department, the media and the public. Deputy Miller’s daily activity entails sending emails, writing releases and reports to the local area paper (Northeast News). In Deputy Miller’s district reports, she gives information such as mug shots (if permitted), description about the incident, names of the people involved, the location, time and date.Deputy Miller thinks that new technologies, such as the internet are a good tool for law enforcement and the criminal justice system because more avenues have opened up because of the internet. Deputy Miller came from a descent family, but growing up; she was always getting into trouble in school. Her parents had to place her in a catholic school in the fifth grade because of fighting. During her years at the catholic school, Deputy Miller convinced her parents that she was able to behave herself, so they put her back in the public sch ool (Barbara Jordan). She attended Barbara Jordan from the tenth thru the twelfth grade were she graduated.Deputy Miller attended Texas Southern University majoring in Criminal Justice. A friend had informed her about a job posting for the sheriff’s department. She applied and was given the job as a deputy sheriff. After learning from friends about her boyfriend being busted on the news for drugs, she knew being in this profession, she had to pick and choose who she hung around. In other words, change out friends; you have to keep yourself clean; not having a criminal record. They also do not want someone with a lot of debts. Deputy Miller had to pull her weapon, but never used deadly force.In her career, Deputy Miller has seen deputies killed. The effect of seeing her comrades killed sets her back. Deputy Miller stated, â€Å"Being a deputy, you build a close relationship with your partner. You are depending on that person with your life; to have your back†. Deputy Mi ller and her peers motto is what to eat, stay dry and GO HOME. Being in the law enforcement profession, ethics is the core value on the job and off the job. Ethics in the field of law enforcement is very important and significant because ethics is used in this field every day. Law enforcement officers encounter difficult decisions that will involve ethical thinking.They will have to deal with different ethnicities, languages, religions and will have to use ethical thinking to deal with them. The officer will come into contact with a variety of people from different cultures. Situations will also occur often in which morals and ethics need to be taken into consideration. Deputy Miller has also witness corruption in her career. One time, she was ordered to return a patrol car for a DNA check. Turned out, a deputy that used the patrol car before her had forced intercourse with a female in exchange for not writing her a ticket in the back seat of that vehicle.Without leadership and ethi cs, we would not have trustworthy officers on the street. Officers take an oath to protect and serve the people, not to go out and commit a crime against them. Deputy Miller’s career choice had some affect on her family. Her first marriage ended in divorce because her husband could not cope with her chosen profession. Her two daughters’ ages eight and twelve supports her, but do not want to follow in her footsteps. She is now married to her best friend, who is also a deputy, who loves and understands her career and her position. She is planning on retiring, but not for another six to eight years.What Deputy Miller love the most about being a media liaison is working alone and not answering to anyone; the least is â€Å"being misquoted†. Afterthoughts In interviewing Deputy Miller, I learned that a â€Å"media liaison officer† has to work in a high pressure environment while maintaining composure. The officer has to be self-directed, detail-oriented, and a ble to multi-task under time constraints. The officer is also required to have strong analytical, organizational, and communication skills. I also learned that being in this line of profession, may cause a strain in your personal life.It is important to have an understanding partner that can swallow their disappointment when the officer is absent from family functions. In this profession, you will miss important occasions and holidays such as anniversaries, birthdays, Christmas’†¦etc. To put it nicely, criminals do not take the holidays off, neither do those that protects us. What I like the most about Deputy Miller’s career title is the interactions with the media and the community. She gets to write stories from the police point of view so that the public can read about what’s going on in their community.Some offices will even be present at a homeowner’s association meeting, asking a lot of questions and taking detail notes to find out about the co mmunity concerns, crime or quality-of-life issues in the neighborhood. I was very surprised to find out that Deputy Miller never had to use deadly force out of her twenty-four years as a deputy sheriff. A very small percentage of officers have used deadly force. Upbringing has a profound impact on the level of tolerance you have for bad behavior. If you had strict parents, than your tolerance for bad behavior is low. If your arents are liberal, your tolerance is probably much higher. Having a strong sense of morals and ethics can guide you for a lifetime. Being a law enforcement officer, family life, morals, ethics, and culture mold an individual’s ability to make a decision to use deadly force along with having confidence.References Deputy Karen J. Miller (personal interview), (Jan. 29,2010). Liaison Officer Job Description: http://www. ehow. com/facts_5559182_liaison-officer-job-description. html Your Personal Deadly force Policy: Operations & Tactics at Office. com, http:/ /www. officer. com/article/article. jsp? siteSection=3&id=32241.

The Low Down on Buy Cheap Research Papers Exposed

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Description Of The Pituitary Gland And Its Function

Figure 4: Hypothalamic and anterior pituitary glands (right) Description of the pituitary gland and its function Use both the flat and 3D models to visualize the following characteristics of the pituitary and its location Morphology mechanisms A tiny-almond sized organ The pituitary gland is composed of three lobes: Anterior, intermediate (smallest) and posterior (see the figure on the right) Anterior pituitary (AP): Hormones (up regulation and down regulation) are controlled by the hypothalamic hormones. The AP is divided into three parts or pars: the pars tuberalis, pars intermedia and pars distalis. The posterior pituitary develops as an extension of the hypothalamus and its cells (known as the magno-cellular neuro-secretory cells have its cell bodies in the hypothalamus and its axons projecting into the posterior pituitary. The anterior pituitary (adenohypophysis) arises from the oral ectoderm while the posterior pituitary (neurohypophysis) originates from the neuro-ectoderm. The following diagram shows the location and histology of pituitary gland Figure 5: the location of the pituitary gland (upper left) and its anatomy (upper right). The middle is a schematic drawing of the pituitary and the lower (from left to right) are: histology of the anterior pituitary, the pituitary histology, pars nervosa and distals and at far right is a section in the posterior pituitary. You should be able to: Draw a schematic drawing of the pituitary gland both location and itsShow MoreRelatedThe Endocrine System1426 Words   |  6 Pagesregulating the bodys growth and development, controlling the function of various tissues, supporting pregnancy and other reproductive functions, and regulating metabolism. Endocrine organs are sometimes called ductless glands because they have no ducts connecting them to specific body parts. The hormones they secrete are released directly into the bloodstream. In contrast, the exocrine glands, such as the sweat glands or the salivary glands, release their secretions directly to target areasÂâ€"for exampleRead MoreEssay on Bio lap report endocrine system1351 Words   |  6 Pagesand being able to identify them and understand their functions. Yes, there are many safety concerns. We have to make sure that we are in the appropriate environment. We must make sure that everything is clean and sanitary. Some precautions that should be taken is watching all of the safety videos and hand washing. Another very important thing is handling the glass slides, if one breaks it can cause injury. 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If so, list what they are and what precautions should be taken. 1. Identify the major endocrine glands and other organs containing endocrine cells on models and diagrams (glands listed below). 2. Identify the major endocrine glands in the cat (glands listed below). 3. Identify the histological features (listed below) of the major endocrine glands on microscope slides. 4. Identify the endocrine organ from which a slide is prepared when viewing the slide with a microscopeRead MoreEssay on The Endocrine System Exam3777 Words   |  16 Pagesto the Gland that Secretes it and the Target organ it effects Hormone ACTH ADH CRH FSH GHRH GnRH hGH (Somatotropin) LH MSH Oxytocin PIH (Dopamine) PRL (Prolactin) Somatostatin (GHIH) TRH TSH A. Liver B. Thyroid C. Gonads – Sperm or Ova D. Gonads - Testosterone E. Mammary Glands - Milk Secreted by 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Target organ 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 F. Adrenal cortex Glucocorticoids G. Brain - Melanin H. Anterior Pituitary I. Posterior Pituitary J. Kidneys Read MoreAnatomy And Physiology Of The Thyroid Gland1402 Words   |  6 Pagesmany people know the affects the thyroid gland can have on the body, and how the thyroid gland has a part in regulating the many different systems. This paper will explain the anatomy and physiology of the thyroid gland, the description, sign and symptoms, causes and risk factors, the diagnosis of the disease, and the possible treatment plans for the disease. The thyroid gland, which is the largest endocrine gland in adults, is a butterfly-shaped gland with two lobes that lie adjacent to the tracheaRead More Impact of Pregnancy Cortisol Levels on High and Low Working Memory Capacity837 Words   |  4 PagesPROJECT DESCRIPTION Impact of Pregnancy Cortisol Levels on High and Low Working Memory Capacity The terms â€Å"baby brain† and â€Å"maternal amnesia† are informally used to describe the perceived memory loss and inattentiveness many women report suffering during pregnancy (Cuttler, Graf, Pawluski Galea, 2010). Previous studies have suggested that this perceived memory loss may be associated with temporary exhaustion of working memory capacity (WMC) (Casey, 2000). In 1971, Marian Diamond andRead More Living with Damage to the Hypothalamus Essay1499 Words   |  6 PagesIt has wide spread connections with the rest of the forebrain and the midbrain. The hypothalamus contains a number of distinct nuclei. Partly through nerves and partly through hypothalamic hormones, the hypothalamus conveys message to pituitary gland, altering its release of hormones. Damage to a hypothalamic nucleus leads to abnormalities in one or more motivated behaviors, such as feeding, drinking, temperature regulation, sexual behavior, fighting, or activity level (Kalat, 2004)