Free Software and its extrinsic qualities
Computer Forensics
Easter Eggs in Ubuntu
Corinto Meffe p. 10
Lauretta p. 4
Alex PĂŠrez p. 18
VOL I N8
ENGLISH VERSION
editorial
Renewal, events and participation in "tough times". The world of technology and
are: FISL 11 (www.fisl.org.br) to be
tors. We love to criticize, or say what
the free software is in constant and rapid changes. Latinux Magazine is frequently being adapted and adjusted to be consistent with these changes that occur and thus transmit them to our readers. That is why in the coming months may see a more interactive magazine, new sections, greater global coverage and a renewed image on our website. However, this would not be possible without your participation, sending your comments, suggestions and contributions. In the month of April will be held throughout latinoamerica the event called FLISOL. As expressed in its website (www.flisol.info), the Festival of Latin American Free Software Installation "is the largest event for the dissemination of Free Software in Latin America." Latinux Magazine will be covering the event in several Latin American cities to through its correspondents. This event is an excellent opportunity for all interested in Free Software, to interact and exchange experiences. Throughout the year various events about
hold late July in Brazil, the CONEISC (www.coneisc.org) to be held in Lima, Peru on early August and Latinoware 2011 (www.latinoware.org), which according to tradition, should occur in Iguazú, Brazil in late October. In all cases, Latinux Magazine will be present. If you are organizing an event related to free technologies or one which incorporates them as part of it, don't hesitate to contact us. I don't know if we can speak of "self-fulfilling prophecies," a term that more than once I've heard from my friend Felipe Pérez Martí, an economist (PhD) with extensive work in the free software economic model. But we speak so much about something, or about our wishes, that them finally happen. That's why I put quotation marks in the title of this editorial with the words "tough times." It is increasingly common to hear that we are going through those times, with indisputable climate and social change, technological impacts. In turn, we heard that we should be more creative these days, in
should have been done (just when it is already known that something went wrong), but it is hards for us to contribute or participate. It is easier to say things are bad, than to work and participate so that they are not. That is why I invite you to participate, to work, to fight for what you want. No one said the road would be easy, but, How would we learn if it is?. Do not let these "tough times", become a self fulfilling prophecy.
Free Software are held in Latin America, however, FLISOL is the only one which is performed simultaneously in dozens of cities in Latin America and is organized directly by the communities. Other events we will cover in the incoming months
fact including talk of survival. In recent years (with an emphasis in recent months), I have not been immune to this "reality”. I have witnessed, how family, friends, acquaintances, employees, partners and even myself, are wondering whether what we are doing is right. Everyone wants changes, improvements, new opportunities, but do not want to take the risks involved. Many want to take credit for the work done, but they are, in many case only specta-
Ricardo Strusberg Venezuela strusberg@latinux.com
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content
editorial
Tips & Tricks
"Renewal, events and participation in p. 1 "tough times"." Ricardo Strusberg
"Easter Eggs in Ubuntu" Alex Pérez
p. 18
events "Computer Forensics" Lauretta
p. 4
sci-fi "The panopticon and others police state paranoia" Christian Bogado Marsá
diffusion zone "Corporate applications in EXCEL, a double-edged sword" Luis E. Vasquez R (levarcol)
p. 22
p. 6
Technology Kiosk "Free Software and it's extrinsic qualities" Corinto Meffe
p. 8
"Open Hardware for Creatives Minds" Marina Bello Alex Pérez
"Access freedom to satellite images and they use to monitor Brazilian biodiversity" Luiz Motta
p. 14
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p. 10
p. 24
content
Comicnology
Directory
p. 26
p. 27
Editor in Chief Ricardo Strusberg Associate Editor Gustavo Maggi Editor María Inmaculada Sanseverino Illustrator and Graphic Designer Marina Bello Administrative Assistant Yeliana Villalobos Translation Martha Romero Administration Jacqueline Pérez de Strusberg For local contacts: brasil@latinuxmagazine.com chile@latinuxmagazine.com colombia@latinuxmagazine.com puertorico@latinuxmagazine.com republicadominicana@latinuxmagazine.com mexico@latinuxmagazine.com peru@latinuxmagazine.com uruguay@latinuxmagazine.com usa@latinuxmagazine.com venezuela@latinuxmagazine.com
LATINUX CLUSTER Sponsored by: Latinux Cluster The Cluster Latinux is an enterprises, educational institutions and consultants network specialized in solutions based in free technologies, including consulting and training for these solutions. At the same time, it focuses in consulting, support, maintenance, developing and enterprises solutions installation services based in free technology worldwide. Inside business opportunities opened from Latinux, one is to cover the no satisfied demand from organizations, companies and governments related to free software development and the chance to take advantage of products and services with a specific local success or in a whole conglomerate acting area.All Latinux participant enterprises are well established in their own working area and all have a long experience with free technology.
LATINUX PRESS Published by: Latinux Press, a division of Latinux Inc. Address: Av. Samuel Lewis, Edificio Central, PH. Panamá, República de Panamá Phone: + 1 305 5171853 / Email: info@latinuxpress.com Latinux Magazine is not responsible for the content posted. The information is responsability of the authors and/or associates mentioned here.
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events
On February 27, under a conferences series in the community at the Higher Institute of Technological Studies (ISEIT) in Caracas, Venezuela was held the first free lecture series on the interesting and mysterious world of Computer Forensics.
The lecture was given by the analyst Juan Angulo Moreno, better known in the community as Apostols. Very cleverly and with limited resources, the organizers managed to implement a teleconferencing system which allowed to see the conversation in another room, through the telephony VoIP audio system and video through a wireless system, using, of course free tools. Congratulations! The event had an enthusiastic audience that despite the presence of "Our Friend Murphy" as Apostols mentioned, did not capitulated in their
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LIBRE CONFERENCE
interest and witnessed with great excitement the lecture. The conversation was characterized as being very anecdotal, Apostols made a quite detailed account of his experiences, mistakes made and how they were overcome in subsequent cases. Emphasis was made on the fact that anyone wishing to immerse themselves professionally in the world of Computer Forensics should have a certificate stating that, otherwise " you'll be humiliated", as Apostols said. The first part was panning about what Computer Forensics is, the procedures to be carried out when working on a case and the final report. He emphasized the vital importance of following all steps as they are determined by law, because if one of them fails, the criminal case could be lost, and then the guilty is not going to be punished. There were some references
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related to the Venezuelan Special Law against cybercrime, published officially under the No. 37,313, October 30, 2001. The Act carefully details the crimes and their penalties, is a must read for anyone interested in this topic. One of the most important procedures of Computer Forensics is the report presentation, about this aspect reference was made about the Interpol forensic report on the FARC computers and equipment seized by Colombia, this is an excellent model of how to conduct a forensic report, it is a recommended reading for all interested in this area. During the second part of the presentation took place the long-awaited demonstration, Apostols showed how to retrieve deleted information from a hard disk with the tools provided by the back track distribution. Photography: MarĂa "tatica" Leandro
Lauretta
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It is now common to find corporations, public and private companies of all sizes and in all sectors, which are strongly "tied" to a myriad of applications (some mission-critical) created and developed in spreadsheet environments . All these organizations suffer from an organizational panic thinking about the possible disappearance of these applications. The worksheets are almost everywhere, are relatively simple to use (at least in its basic elements) and they can be quite sophisticated, but its design is always uncontrollable, and without implementation of corporate standards, quite poor and lacks any controllable periodic maintenance process. It is common that advanced users of spreadsheets, use them to develop large scale applications in all types of businesses. Thus, it is not unusual to find financial applications, costing and inventory systems, forecasting systems of all kinds, payroll and payment systems, business analytics (BI), which are essential for regular operations. Today, the complexity of some spreadsheets compete widely with regular databases created in the corporation using today programming languages and tools. Consequences and real limitations Certantly this situation creates a number of business risks, the spreadsheet applications are typically develo-
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ped by professional profile users and not by experts and/or professionals in the field of Information Technology and Software Engineering. Because of this, there aren't spreadsheets applications designed, developed, tested and maintained using rigorous programming standards and/or software management. Over time these applications will grow, will become more important for business-critical operation and will transform their designers, essential characters into the organization, which will result in enormous additional costs for maintenance and/or conversion, with the consequent administrative limit related to the free and optimal management of human resources in the organization. How many times a manager has not heard with some frequency the human resource director saying "that person not only developed in full the payroll application in Excel, is also the only person who knows in detail the secrets of its operation, So we could not move, give vacations or just separate he/she from here, because the organization would suffer an enormous trauma�. Severe limitations of spreadsheets, may include events such as calculation errors, according to a study by Panko (2005), in companies of different sizes using spreadsheets in mission critical applications is typical to "find error rates between 24% and 85% in the performance of these applications." Errors
of this magnitude are not only unacceptable, they cause a huge negative impact in their structures, due, without a doubt, to bad decisions made based on this faulty information and/or the performance of such applications. Another important factor is the absolute lack of documentation generated by the author(s) of the application using traditional and/or automatic methods. This is, without doubt an inevitable prerequisite to produce their proper and subsequent maintenance and support, even if the developer is no longer with the company. Today, documentation for spreadsheets used in business is a rarity totally absent. This applications have a limited results collection, because spreadsheets lack the proper tools to operate efficiently with collaborative applications, which have big demands on on-line data consolidation, direct integration with other applications and operating online and in real time the business "Core" or kernel, Finally the applications developed with spreadsheets, never control, certify and/or validate the source data. Neither do with their sources or origins, opportunity and support. Leaders and managers of organizations must look with great caution and as a clear sign of alarm, the uncontrolled growth of business solutions developed using spreadsheets. The truth is
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that very few organizations have con-
operation of the organization.
mercial versions of MS Office;
trols and monitoring procedures for
- Your current person(s) in charge of
that "binds" the user directly to a copy-
such developments, and far fewer still are those that recognize their enormous limitations and guidelines and bad business decisions taken, bearing on the results obtained by these applications. As Panko shows (2005), an audit and QA actual study done on these tools found errors "in 94% of Excel spreadsheets examined", in other words it should state that corporations make decisions using spreadsheets business-critical ap-
them - Its elements of documentation, validation and data collection. - Obtained results.
righted1 product. Not in vain IBM in his "Work Smart Jam", Sep 2009 said: "Currently 42% of managers in public and private entities use incorrect information to make organizational critical decisions"
plications is really dangerous. Corrective steps Each entity or corporation that is immersed in this environment, is advised to raise a clear current inventory of these applications, showing in each case: - The level of complexity (total depth of your code, forms, tables and dialogues used) - Number of users. - The level of importance in the actual
Conclusions It is clear that this is a corporate situation more common than is desirable and even worse, completely unknown and actually projected by management and senior corporate management. In fact there are countless companies that are unknowingly immersed in this critical situation and are charged, unknowingly with productivity high costs that significantly affect their income statements. This also makes a huge barrier to corporate migration processes to free software environments because these applications have been developed in VBA (Visual Basic for Applications) tool brand, available in almost all com-
and
References - Allwood, C. M. (1984). Error Detection Processes in Statistical Problem Solving. Cognitive Science, 8(4), 413-437. - Basili, V. R., & Selby, R. W., Jr. (1986). Four Applications of a Software Data Collection and Analysis Methodology. In J. K. Skwirzynski (Ed.), Software System Design Methdology (pp. 3-33). Berlin: Springer-Verlag.
Luis E. Vasquez R (levarcol) (Colombia) starsuitesun@gmail.com
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The phenomenon of digital technology and the Internet have created a new context of history around the year 2000: a technological and information revolution, definition developed in recent years by Castells [1]. What we know is that we are still in the early discoveries that will transform existing economic, social, and cultural models
Some events have already been identified and evaluated in the literature: the "The Long Tail" by Chris Andersen [2006], the "Wealth of Networks" by Benkler [2007], "The World is flat," by Friedman [2005.2006 ], “The Joint Production Base" by Toppscott [2007]. All operate, in its own way, a common scenario: the emergence of the economy of intangible assets and the collective and collaborative production network. Brazil's experience with public software (SPB), is aligned with the authors mentioned above regarding the economy of the future. However, some distinctive features, particularly due to development and learning with the model of the SPB, has designed a new phase for the initiative. This step comes from the extrinsic qualities offered by the software. Although the term is of little use in native language, is one of the great changes occurring in the economy. At the risk of being redundant, extraneous, is a kind of symmetry in the external environ-
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INTERNATIONAL PUBLIC SOFTWARE
ment. Assets have been always treated while taking in account their internal, external and extrinsic qualities, but these last two, largely as internal or at a low level of interference with the environment. The influence that the model generates emerges from a reflection on the environmental aspect. Among the intangible assets that have been created more wealth directly - related to the good news - and have transformed faster, is the software. This means that the potential for a good program for providing support to a base of operations for the economy of intangible assets is more likely and decisive. The quality and security of software can improve the production chain and the goods' expan-
sion and also press an ecosystem formation, due to increased aggregate demand from clients for computerized solutions. These demands arise as a result of increased computer offers, greater connectivity and computing number of solutions offered. The extrinsic quality overlaps to some extent to the outer. Something that is confusing at first. But look what happens when a health area software production increases. By offering freely this kind of solution this can create an "internal impact” immediate in
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the "natural" well-being, and checked
an environment, is the one which gene-
All solutions that will join the
in this case as the internal quality, ie the code.
rates an "extrinsic impact." Thinking in the same way in
The user, who represents the demand, can hire services to improve the software. And when the software is used by a larger user base, it means that the amount of services provided to the IT area can increase, and therefore this would be an "external impact". Now, a software health area rapidly reaching hundreds municipalities can generate an extrinsic quality as well, due to the improvement of health services provided to citizens. We believe that this case, the health service as
several other segments of the public service, of some chain of production or technological innovation, means that if we increase the production of free solutions with sustainable business models and focusing on the demand, we can generate a set extrinsic qualities - or environment - for various economy sectors. The model depends on increased turnover in the software that includes an improved code, the increased demand for services and influence on other economic and social segments, making the software into something with more presence, profitable and strategic. Taking advantage of today structure offered by thepublic software concept to accelerate the turnover of software companies would put the country in levels of leadership in information technology.
portal SPB (www.softwarepublico.gov.br) and which are able to manipulate their ecosystem will gain a greater amount of new versions, increased staff, increased movement of financial markets and broadening in their users base, including the international arena. In the world of intangibles, particularly software, external qualities do not end when the consumer is related to the good. A number of other consumers can do the same. Of course here is boarded a trivial issue of this model this is not the good rivalry. If a person uses it, it does not prevent someone else from doing the same simultaneously. When the software is used and as a result a machine is added at the information desk, this can improve the citizen service process . This same reasoning means that a production line can be faster, increasing sales volume and helping improve the quality of other products. Here is an example of the weight of the software extrinsic. This means that a good software, additional to bring quality to their own "natural" good in the case of your code and the demands of their environment, improves the quality in production chains. So we say that the production, distribution and use software at large-scale - increased turnover
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combined with its universal access will increase extrinsic qualities of several other sectors of the economy and will expand the range of services offered to society. By placing the software as a microeconomic component, it can be perceived that their role may also increase the qualities of the other economy sectors - the middle area, the development of Information Technology - and in this case the destination area, improve service to society - with higher quality and additional services. The public software model strengthens an important auxiliary line. This is another element to add: speed. In administering any studies on the stock change, indicating that the inventory turnover must be managed and that the higher its speed, more vigor and efficacy reach its management. Taking this principle as base, we conclude that the software, that the extrinsic qualities, must move faster on the market, so extrinsic attributescould be accessible to a larger body of society, which needs to appropriate this good swiftly. The Public Software Portal acts as a distribution, one of the bases to accelerate the turnover on the use of available solutions. But they still face serious problems in the country IT industry,such as digital exclusion, lack of connectivity in many small cities and high IT services cost. Despite this, one of the issues can be addressed immediately is the exclusion from access to software. The
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use of a free license and creating a production public base allows immediate access to the software. This action drives the solution of other problems, such as the cost of the license that prevents access to certain software. By crossing the two characteristics: the extrinsic and increased turnover and adding that the software generates wealth (X), we can trace the increase in speed of movement - or use – of the software (X ') and see if it meets the demands of society and at the same time, increases quality in the process (X'') - extrinsic qualities - which can therefore create a demand growth which drives the market and generate an increase service providers. The assumptions are recent. They come with the expansion of the intangible economy. The software is a product of which we can obtain the best economic result in combination with the variables X, X 'and X'', as described and just here we have an opportunity to demonstrate the virtuous economic model that begins to take shape with Brazil's experience in public software. Published in Latinux magazine with permission of the author. This article was published in
Portuguese in Brazil ComputerWorld magazine. Source: ComputerWorld Brazil Portal http://computerworld.uol.com.br/negocios/corinto_meffe/idgcoluna.2010-0129.0296050978/ Corinto Meffe Brazil corintomeffe@gmail.com
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diffusion zone
Brazil is the country y with the greatest biod diversity on th he planett. It was the first to sig gn the Convention on Biiological Diversity (CDB), and is consideered meega-d diverse – it means a country with at least 70% of plant and animal species on th he planet - by Conservation Internatiional (CI).
Biodiversity monitoring requires information technologies, emphasizing the use of satellite images as the largest source of data to evaluate the natural vegetation cover preservation and conservation. Above satellite images we have others sources, how as field data collected by forms and geographic coordinates using Global Positioning System (GPS) and digital cartographic databases. Spatial databases are used in computer programs called the Geographic Information System (GIS) which enable relations between alpha-numeric information and geographic coordinates. The investment to perform biodiversity monitoring activities can be divided into: a) Infrastructure: equipment and network access service ; b) Human resources with understanding in
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the GIS area c) Digital data such as cartographic databases and satellite images; d) GIS Programs. One of the issues harming the monitoring activities is the limited use of these technologies. The satellite images are still part of a business object, that is, the images are produced to "make money", there is always just a prejudice of this technology, because on one hand we will never have enough money to buy all the interesting images, and on the other, who produces them will always "throw in the trash" unsold images. In equipment, we have a tendency that increasingly requires us to "buy new" which is not desirable, we want to use satisfactorily our equipment as long as possible. The network provision services is a new market, and we are still paying dearly for the novelty, but efforts are being made to minimize the cost, such as digital convergence,
using the same medium to more than one feature, for example, phone plans along with access to broadband Internet. Human resources needs qualification, which is required under the professional team trained in business (natural resources) with understanding in technology (GIS). The cartographic databases are mostly built by the government and they are going through a period of providing the information in digital media. The GIS available on the market offer a lot of features, but users most often use 5%, paying for a whole to use very little. The use of free software is an important tool to combat the problem raised in the previous paragraph, "limited technology". The equipment used with free operating systems allow to enhance their life, reaching the end of their life because they are missing parts. In Human Resources there is no
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exclusion of users, because anyone can know the technology provided by the free GIS software, having at their disposal, the GIS handlers operation, reading the program sources or the methodologies employed, these by nature, embrace open standards, freely available, for example, the standards defined by the Open Geospatial Consortium (OGC). The digital cartographic and satellite images can be provided on the Internet with free technology, using programs supported by the Open Source Geospatial Foundation (OSGEO). The OSGEO also supports the free Desktop GIS that offer enough features for biodiversity monitoring activities. We still have a problem! The acquisition of satellite images. Finally, let's talk about Brazil. The Brazilian government adopted a free distribution po-
licy of medium and high resolution satellite images , offering Brazilian users a LANDSAT and CBERS collection of satellite images. The images are available at the National Institute for Space Research (INPE) site, http://www.dgi.inpe.br/CDSR, for download. In Brazil, the satellite images distributed by INPE play a facilitating role in biodiversity monitoring, providing an unprecedented requirement for professionals who are dedicated to protecting nature, being possible, assessments of historical series ever imaginable until recently. As an exam-
ple, a search was made of satellite images, in the INPE site, with a maximum of 50% covering of clouds, in the area of Jau National Park (Figure 1), approximately 2,467,000 ha in the Amazon region, resulting in 11 types of images between the years 1973 to 2009, totaling 458 scenes (Table 1).
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Figures
Sattelite/ Instrument
Number of scenes
Period (years)
CBERS2/CCD
21
2004-2008
CBERS2/IRM
4
2004-2004
CBERS2/WFI
8
2004
CBERS2B/CC
21
2008-2009
CBERS2B/HR
36
2007-2009
CBERS2B/WFI
24
2007-2009
LANDSAT1/MSS
8
1973-1975
LANDSAT2/MSS
54
1976-1981
LANDSAT3/MSS
9
1978-1979
LANDSAT5/TM
258
1984-2009
LANDSAT7/ETM
15
2001-2002
Table 1 - Availability of satellite imagery from the INPE site that cover the area of Jau National Park in the Amazon region.
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Now, we will add free access to satellite images with a GIS free program, Quantum GIS (QGIS www.qgis.org), this allows to select and request INPE scenes download. This work, developed by the author, consists of two plugins for QGIS, enabling it to work with images from the INPE site, making the choice of images easier (Figure 2 and 3). The plugins are open source and freely available on the QGIS contributors site , http://pyqgis.org/repo/contributed, namely: a) Image catalog from INPE - Create Layer 0.1 and b) Image catalog from INPE - View and order to download 0.1.2. A plugins demonstration use is available at http://www.youtube.com/watch?v=bXPlDNGiLNE. The sum of free GIS software and free access to satellite imagery promote a better place to monitor the our planet biodiversity, and I hope the Brazilian initiatives provides an example to other countries, showing the benefits of making available their satellite images for free .
Figure 1 - Jau National Park (Amazon region)
Figure 2 - Using the plugin "Image catalog from using" in QGIS for analysis of images displayed on the site of INPE - Landsat5/TM example images.
Figure 3 – Quicklook of image with sceneid L5TM23206220080930.
Luiz Motta Brazil motta.luiz@gmail.com
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As Easter holidays approach I'll leave you a few gifts. These little "surprises" that are commonly called Easter Eggs (Easter Eggs) are perhaps the product of programmers’ and programs and applications creators’ sense of humor or fun. After researching and compiling many of them, I selected some Easter Eggs in Ubuntu for your entertainment. Enjoy them! Gnome Desktop Trick # 1: Open the Run dialog or Run (Alt + F2) and type: gegls from outer space it will appear a classic game: P Trick # 2: Open the Run dialog or Run (Alt + F2) and type: free the fish If you want to remove what appears in this trick, go to the terminal and type: killall gnome-panel Trick # 3: Right click somewhere in the empty area of the main panel of GNOME (upper or lower) -> Properties -> Right click 3 times on one of the 2 tabs (General or Background). And you will see a funny animation. Open Office Trick # 4: Create a new spreadsheet in Open Office -> Then write in a cell in the worksheet: =GAME("StarWars") and press Enter
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You’ ll see a classic game menu. If you finished the game and want to play again close Open Office and run above steps again. Trick # 5: Create a new spreadsheet in Open Office -> Write on a cell in the worksheet: =GAME(A2:C4,"TicTacToe") and press Enter Inside the cells A2 and C4 you can play the classic game of Tic Tac Toe, each time upon completion of a game, a new one will start again which will continue in the next 3 rows. Trick # 6: Create a new spreadsheet in Open Office Write in a cell in the worksheet: =STARCALCTEAM() and press Enter You will see the creators of OpenOffice Calc Trick # 7: Create a new spreadsheet in Open Office -> Write on a cell in the worksheet: = TTT() and press Enter A smiley will appear randomly each time you write this command in a cell in the worksheet. Trick # 8: Create a new text document in the Open Office Word Processor -> Then write: 'StarWriterTeam' and press F3 You will see the creators of OpenOffice - Word Processor Note: You must leave the text cursor clicking on the written words before
pressing F3, otherwise this is not going to work. Terminal Trick #9: Write in terminal: apt-get moo And you’ll see a funny message. Trick # 10: Write in terminal: aptitude moo, A message will appear, now write: aptitude-v moo Either message appears every time you add a v: aptitude -vv moo aptitude -vvv moo aptitude -vvvv moo aptitude -vvvvv moo aptitude -vvvvvv moo It's pretty entertaining, only allows up to input six iv, you’ll understand why later : P Trick # 11: Write in terminal: sudo apt-get install cowsay After you install the package write: Cowsay <any word or a set of them> Ex: cowsay hello from the meadow And you will see a rather peculiar picture with the written message. Trick # 12: Write in terminal: ddate DD MM YYYY Where DD is the day, MM the month, YYYY the year in numbers. Ex: 12 08 1984 A particular message will appear about
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that specific day. Trick # 13: Write in the terminal : zgrep "The.*Release" /usr/share/doc/dpkg/changelog.Debian.gz The "Good, clean fun" Release You'll see some of the names of the Debian. Firefox Trick # 14: Write in the web address bar: about:robots And a message about robots will be showed. Trick # 15: Write in the web address bar: chrome://browser/content/browser.xul And the browser content will be displayed within a tab. Finally, apart from a bit of humor from this month tricks, I’ ll give you a tip that may be very useful to hide a compressed file .zip with an image, this can be useful when sending files you wish to hide from unpleasant people, it works as follows: There should be 2 files in one directory: 1. A Jpg image 2. The zip file to hide. Once we have this, proceed to:
Go to the terminal, go to the path where the files are and type: cat 'imagefilename.jpg' 'compressedfilename.zip' > newimagefilename.jpg
area, starting with ZIP (header) to ZIP (end). I hope you have enjoyed and learned something from this!
Ex: File Location: Personal Folder gegl.jpg, Important.zip I use the Terminal to go into the path of my personal folder and then write: cat 'gegl.jpg' 'Important.zip' > dfrawing.jpg The file drawing.jpg will be created in that directory When opening drawing.jpg, the gegl.jpg image will appear, but if we rename the file drawing.jpg as draden wing.zip it will reveal its hidden content, ie Important.zip For those who want to go deeper into omthe matter, the Linux Shell cat command is used to concatenate files with the > operator that is redirected to a single concatenation output, in this case an image .jpg and a .zip file are concancatenated to a new jpg file, so at the moting mento you open this file the operating system read the file the following way: y: PEG JPEG (header) JPEG data JPEG d) (end)+ZIP (header)ZIP data ZIP (end) When you open the file as an imagee it will only read the JPG file (header)) to p fiJPG (end) and if you rename to a .zip PEG le it will be read by omitting any JPEG
Alex Pérez
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In a television interview, a former CIA official jovially mentioned that much of the power the Agency has was in the minds of people. An old trick made them objects of respect and fear on the part of any conspiratorial group of the world, as well as ordinary civilians with paranoid personalities. Laughing, he said the resources, both human and technological, were limited. But still people insisted on believing that all phones were tapped, all the sites monitored by satellites and the CIA was a big eye in the sky that should be feared. Nothing could be further from the truth.
Consider the number one terrorist of our times and the years that he has escaped the huge swarm of cameras, satellites, spies, reconnaissance aircraft, sub-dermal chips, tapes, destroy-bunkers bombs, intervened webcams, traitors and all the various monitoring mechanisms known to man. Osama Bin Laden is just one example among thousands that as in gases, it is always easier to determine large numbers of humans behavior - like an army - than a single individual one. And that no organization on earth is omniscient, but almost all have been founded on the Leviathan. The issue most people do not know is that Aldous Huxley Brave
New World is prior to 1984 by George Orwell. What even fewer people know is that both are polished versions of a more ancient story, We, by the Russian Yevgeny Zamyatin, who in 1924 wrote a story that is so old, at least, as the Bible. It is generally known that no matter if no one sees you commit a sin, it remains a sin. God, like many other ancient deities, has the power of omniscience. For various reasons, the dollar bill has been the subject of much controversy for including the symbol of the "Eye of Providence", the all-seeing eye
MEN NEED TO FEEL THAT THEY ARE MONITORED SO THAT CONTROL WORK
of God. The Panopticon. Panopticon, a word that means "to watch over all things" is the name given to a former prison design, like a rotunda (with central courtyard and around cells) which allows complete prisoners monitoring. In the novel We, the "numbers" - persons - should not be watched because there was no such thing as privacy. The houses, as long theorized by the futurists of the time, were made of transparent glass. All the buil-
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dings were only extensions of public space. For decency, Zamyatin wrote that the only time that there was something like privacy was during sex, but performed behind a curtain after notification to a public agency â&#x20AC;&#x201C; through an interesting pink coupon system that allowed a regulated promiscuity that had "tamed love." In the case of George Orwell, the construction of global Panopticon was imminent. It was not necessary to imagine marginal societies to think that everyone would be oppressed. With the imminent fear of Nazism and Stalinism devastating terror, this English socialist brought us the story of how INGSOC will install "telescreens" in every room of Eurasia, effectively destroying the privacy with two-way transmissions. To resolve the issue of privacy, Brave New World found that a simple Pavlovian conditioning and the use of learned psychoanalytic techniques were enough so people wouldn't want to have privacy. The absolute vigilance is unnecessary, as all are happily conditioned to public life, with outdoor activities which were intellectually little compromising. It is clear that people act differently when they are not being watched. Some of us have had a great shock when we learn that others were
nearby, because we though for a long time that this wasn't happening - even if we were doing nothing unusual. It is a lot of people opinion that what people do in private is very important, a State Security issue. It's nothing new, but certainly we have never had so many devices to make sure the neighbor is not doing anything morally wrong. While it seems like a rather neurotic behavior, it is conceivable that at times this position has been right. In all fairness, the weapon which destroys worlds, the atomic bomb, was built privately, outside the eyes of the world. It was also far from the watchful eyes that the same weapon was stolen by spies and sent to Russia for replication. The issue of monitoring in the psychotic world of international aggression, it's very serious work. 'Intelligence' Agencies , popular in almost all countries, see from their satellites the behavior of their enemies and friends, and their own citizens, also. Matters of National Defense. For security, too, are installed in cities surveillance cameras everywhere. Small "telescreens" ensure that, at least in public, no one deviates from the straight path. In a modern state is not so easy to sin without anyone knowing. But all the guards in the world know that you can not watch everyone all the time. George Orwell assumed it, and Brave New World is based on this
precept. Men need to feel that they are monitored so control works. There is no need to be genuinely watched. An ancient tale from an old political scientist taught us the way to order was the fear of Leviathan, great monster who monitors and is all-encompassing. All appliances in the world are not pragmatic enough, even so we can see them from Google Earth, so we can tap phones, computers and any appliance, men can still be at large. The illusion of life locked in the Panopticon, however, is sufficient for most of the people, in order to act under authority conditions.
Christian Bogado Venezuela inverso@gmail.com
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technology Kiosk
Arduino, an Italian invention, in just five years since its creation has become the most coveted toy for any electronicsâ&#x20AC;&#x2122; lover programmer. The rise and popularity that has earned this open hardware platform in such a short period of time is perhaps due to the breadth of its applications, to its versatility, the freedom that gives its users to create virtually any project without limits. The easy acquisition and product low cost is another of its advantages, it is also possible to build it if you have access to specified electronic components. On the official Arduino web site (http://www.arduino.cc) are available to the user the platform construction schemes and the software to program it
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(integrated development environment or IDE). Also you can get information, tutorials and specifications to develop step by step easy projects. With all its advantages and the experiments of those who program microcontrollers it is easy to understand why Arduino applications have evolved so quickly. Bringing electronics to programming it is possible to create the most amazing inventions, combining components: LEDs, potentiometers, analog and digital buttons, piezoelectric transducers, servo motors, light, temperature, humidity, and proximity sensors and accelerometers. And
Shields, prefabricated electronic boards that serve as extensions for the Arduino: Ethernet, touch screen panels, Wifi, MIDI, LEDs matrix, SD memory reader and GPS. Aggeggio future is unimaginable; as it continues to grow at this rate there is no way to predict what the future inventions and projects will be and how they may contribute to the evolution of technology, computers and electronics worldwide. Letâ&#x20AC;&#x2122;s take as a starting point for that future examples of applica-
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tions, some of them already exist, others only in the imagination of a few ... In the robotics field has created some simple projects, robots avoiding obstacles or recognize edges of rooms, using proximity sensors (infrared signals) to avoid colliding with objects or walls. Other, more complexes can even draw, talk, grasp and move things, as that is scheduled earlier in the development interface and sends signals to the Arduino via WiFi connection, infrared or Bluetooth. In a MIDI interface, sending and receiving signals can create various types of synthesizers, pianos with colored lights, battery-sensitive blow or a laser harp in which the musician interacts with the projection of rays ( "the strings") to create music. Besides entertainment applications the platform can be used for various practical applications. For example, it would be possible to automate home functions; turn on and off the lights at home, monitor and fill a water tank, schedule a supply of dog
creens and wireless shields. The daily food ... And using sensors in plants, menu would appear in Touch screens programmed to monitor levels of humiwith products images to make easier dity and light that can send a message to the cell via Twitter: "I need wa- the customer selection. On the main computer orders would appear and ter!" from it messages could also be send to Connecting an alcohol sensor the table. platform can get a gauge of the breath alcohol concentration. It is also possiSo the ordering and customer ble to create a contamination meter conservice processes could be expedited, necting the Arduino with a carbon and may not be so far a point where romonoxide sensor or manufacture weatbots are going to be the ones delivering her conditions detectors (temperature, orders ... humidity and wind sensors) or even seismographs (using accelerometers or Marina Bello piezoelectric transducers). Alex PĂŠrez These and many other examples can be found on the websites: http://hacknmod.com/hack/top-40-arduino-projects-of-the-web and http://blog.bricogeek.com/noticias/arduino/page Arduino-computer interaction would be useful in places like crowed cafes, bars or restaurants. The tables would have Arduino installed, touchs-
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