HCI means Human Computer Interaction...This paper on HCI gives you a fair detail of what HCI is and we have presented you with our ideas and insights....Walk into the future with HCI .

1. HUMAN COMPUTER INTERACTION
Authors: [1] S.Nalaemton, III year CSE Dept., DMI College of Engineering,
[2] Mervin Ceasor Thomason.T, III year CSE Dept., DMI College of Engineering.
Abstract:
Human-Computer Interaction involves the
study, planning, design and uses of
interaction between people and computers.
Computers have been the latest sensation of
the twenty first century. Nowadays,
Computers have developed so much that
human is now trying to make it still more
interactive. Computers have now slowly
becoming a companion to the present
generation. We always need an interface to
connect to the computer. An interface is a
point where humans can tell the computer
what to do. The existing interfaces differ in
degree of functionality or usability. The HCI
devices are basically relying on three human
senses: vision, audio and touch. Some of the
applications of HCI are: Intelligent homes,
offices, Driver Monitoring, Intelligent
gaming, E-commerce and Helping people
with disabilities. We provide our ideas to
enhance the usage of the above mentioned
applications of Human Computer Interaction.
Introduction:
Humans interact with computers in many
ways and the interface between the user and
the computer is crucial to facilitate this
interaction. Some of the common examples
of interfaces used include Graphical User
Interface (GUI), Voice User Interface (VUI)
and the gestalt User Interface (gUI). Some of
the common applications of GUI are:
Desktop applications, internet browsers,
handheld devices, etc. Similarly, the common
applications of VUI include voice
recognition, synthesising systems, etc. The
gestalt User interface allows humans to
engage with embodied character agents
which cannot be accomplished by other user
interfaces. One of the most common
definitions of Human-Computer Interface is
as follows: ‘Human–computer interaction
(HCI) is the study, planning and design of the
interaction between people (users) and
computers. It is often regarded as the
intersection of computer science, behavioural
sciences, design and several other fields of
study. Interaction between users and
computers occurs at the user interface (or
simply interface), which includes both
software and hardware; for example,
characters or objects displayed by software
on a personal computer's monitor, input
received from users via hardware peripherals
such as keyboards and mice, and other user
interactions with large-scale computerized
systems such as aircraft and power plants.’
History of HCI:
The term ‘Human-Computer Interaction’
was popularized by Card, Moran and Newell
in their first seminal book titled ‘The
Psychology of Human-Computer Interaction’
in the year 1983 (although the first usage of
the term was in 1975. Just like how a
hammer is used for nailing, the computers
can also be used in the real world. We have
already created virtual worlds, simulations
and many others. The next step is to take the
computers to the real world and use it like
any other real world entity.
The Goals of HCI:
HCI aims to improve the interaction
between the user and the computer. The
methodologies to create new user interfaces
are in high demand that all the present user
interfaces do not suffice the demands of the
future. Techniques have to be developed for
evaluating and comparing interfaces. The
long term goal of HCI is to design systems
that minimize the barrier between the human
mental model of what they want to achieve
and the computers support of the users’ task.

2. Applications of HCI:
The applications of HCI have far reaching
outcomes in the real world. The HCI devices
are basically relying on three human senses:
vision, audio and touch. Some of the
applications of HCI are: Intelligent homes,
offices, Driver Monitoring, Intelligent
gaming, E-commerce and Helping people
with disabilities. The demand for creating an
interface that supports vision, audio and
touch is at the peak now. Cheaper available
computers and workstations are meant to
people more than just machines. People are
no longer willing to accept poor interfaces.
The common thing between all HCI devices
is that every HCI device has at least one
sensor. The Multimodal HCI System is of
great use recently.
Our findings:
Out of the endless applications of
Human-Computer Interaction, we chose to do
a research on the applications of HCI in
helping people with disabilities. We have
seen many people suffer with visual and
hearing impairment and dyslexia. These
people are differently abled and they deserve
to use the technology that a normal human of
the twenty first century uses. As we were
finding new ideas for helping the disabled
with HCI, we came across the Multimodal
Human-Computer Interaction (MMHCI)
system. Combination of multiple modalities
or usage of more than one independent
channel signals for the interaction between a
user and a machine is termed as multimodal
human computer interaction system
(MMHCI). A multimodal interface acts as a
facilitator of HCI via two or more modes of
input. It is easier to use by the disabled and
the illiterate people. An example for the
Multimodal system is ‘Put That There’
demonstration system. The multimodal user
interface uses the text, vision or speech as
input. It analyses the gesture, language and
gaze and sends it to the Multimedia
application interface. The outputs will be in
the form of graphics, animation, speech and
sound. The most popular multimodal web
interface is Bharati. It consists of text and
speech icon for the illiterate people. The
Bharati Chitra is an iconic module that is
used by the people who are unable to read or
write in their own mother tongue. The speech
based module named Bharati Dhwani is for
those who speak well but not well versed in
writing in their own mother tongue. Bharati
Akshar is a text-based module which helps a
person who does not know English to write
in English with the help of his/her mother
tongue. A good application of multimodal
systems is to address and assist disabled
people. In this system users can interact with
machine using voice and head movements.
Two modalities are used and both are active
continuously: speech and head movements.
Speech provides the needed information
about the meaning of the action that must be
performed with an object selected by the
cursor. The head position indicates the
coordinates of the cursor on the screen at the
current moment.
Conclusion:
The quality of the system depends on the
usage and representation of the system. The
virtual reality is going to be the future
interface of the system. As we all know,
‘Necessity is the mother of invention’. As we
need things and commodities for a better
tomorrow, we create different technologies
today. That is what led us from the Industrial
Revolution back in the twentieth century to
the Information Revolution in the present
twenty first century and we are sure that it
will lead us to another revolution soon.
References:
 Saul Greenberg’s ‘History of HCI’
 hci.stanford.edu/courses/cs547
 Wikipedia – HCI
 Allen Blackwell’s ‘Human Computer
Interaction Lecture Notes’