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agreeing to pay a fine of US$61 million for illegal conduct related to fuel surcharges in the international air cargo market |
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The catalyst maker reports a 15 per cent increase in first half profits and predicted similar levels of growth for the rest of the year |
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China's leading heavy truck maker, Sinotruk, saw its shares fall more than 15 per cent on their market debut in Hong Kong |
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House prices in Britain are overvalued by about 30 per cent, the HSBC said yesterday, sounding the alarm that the property market could suffer a similar slump next year to that experienced in the US. |
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Memo to Messrs Hicks and Gillett: That, gentlemen, is what you pay the money
for. Sincerely, Rafa. |
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A programming lesson I keep relearning.
The design of the central data structure of an app determines the quality of the app, in every way.
Any extra thought that goes into this, will pay off in:
1. Maintainability of the code.
2. Size of the code (you'll write less code with a well thought-out central data structure).
3. Simplicity of the user interface (the structure inevitably shows through in the UI).
4. Ability to respond to feature requests.
5. Adapt to new hardware, OS changes, other apps.
6. More "it just works" experiences.
This is why it's sometimes the right thing to start over from scratch. Programmers often want to start over because they look at the code and it looks complicated, and they think they can make it simpler if they start over. They're right, of course, it will be simpler when they start over, because it won't do nearly as much as the mature product does. Once they finish building out the feature set, it may well be just as complicated.
It's a judgement call. I remember looking at the source of Unix kernel for the first time as a grad student in Wisconsin, and being amazed at the simplicity and obviousness of the code. I couldn't believe something so simple actually worked. Your code at its kernel level must have this simplicity. But at the edges, where you're accomdating the minds of users, inevitably it gets a little messy. The key thing to look for is how hard is it to add a completely new feature. It should be easy to do that. If it's not, it's likely because of a poorly organized (and therefore not well-understood) central data structure.
I've rewritten apps many times, over many years, because when I wrote the first or second versions, I didn't understand the problem well enough, and the code had turned into a morass of patches and workarounds.
Right now I'm recoding the internals of a special-purpose aggregator. I've written many of these, over the years, always quickly, trying to get something running fast, and then lived with data structures that resulted. This time I'm going slowly and carefully, with an installed base of one (me) and ripping up the pavement whenever I find even a slightly better way of doing something. I have other users who are waiting, but that's life.
5/7/97: "When a programmer catches fire it's because he or she groks the system, its underlying truth has been revealed." |
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For all those taking part in the One Laptop Per Child "Give One Get One" program, ever wonder where those donated laptops are going? I wondered the same thing. Here's what I found out. |
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The search and advertising company is a force to be reckoned with across the Web. Now it's looking to do the same in alternative energy (along with many others, large and small). |
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Critical vulnerabilities in common PC software, including both applications and operating systems, continue to grow in number and stand as the leading cause for concern in the IT security landscape today, according to training experts at the SANS Institute.Holes in so-called client-side applications, including Web browsers, e-mail clients, productivity suites, and media players, have become particularly worrisome over the last year, according to SANS, which highlighted the issue as part of its annual report on the top 20 Internet security risks for 2007.As hackers have shifted their attention further away from operating system flaws and drilled down to applications-layer vulnerabilities they have found a seemingly endless wealth of possibilities for infecting PCs with everything from spyware to botnet programs, SANS researchers contend.Unless something can be done to improve software developers' coding habits or better test popular applications for such issues before they land on end-users' machines, attackers will be able to continue their successful assaults against enterprise networks and devices for the foreseeable future, said Rohit Dhamankar, project manager for the Top 20 report at SANS and a senior manager of security research for TippingPoint.?"There's just been such a dramatic rise in the numbers of vulnerabilities found in applications like Internet Explorer and Microsoft Office and a number of media players that attackers are having their way," said Dhamankar. "Enterprises are bolstering security, but desktop users still pose a massive risk if they can download anything they want from the Web; the attacks are also growing in sophistication to the extent that many can defeat antivirus and other security systems primarily by obfuscating their code."Some of the most powerful tools that hackers have adopted in hunting for potential targets are the same industrial-strength applications fuzzing tools that software vendors themselves are using to search for holes in their products, said the expert.Enterprises could do themselves a favor by enforcing stricter policies that dictate the types of applications that end-users are allowed to put on their work machines and using technical means to ensure that those rules are being followed, Dhamankar said.Other SANS researchers noted that while companies may not want to tell end-users that they cannot utilize media players, messaging clients, and other applications that have moved into the business world from the consumer sector, they could help themselves out by limiting the variety of client-side applications that people may choose from."IT departments can't focus on all the applications of the world, but they can choose several and keep their eye on those while allowing end-users some freedom," said Amol Sarwate, research manager at Qualys who studies vulnerability patterns for SANS. "What companies need to do is enforce standards for applications usage and utilize technical means to block unwanted software, devices, and even wireless access points."While many businesses have already realized that they need to shift more of their efforts toward defending client-side vulnerabilities, most have failed to embrace a proactive approach versus simply keeping track of publicly-reported flaws and patching those issues said Sarwate.Enterprises need to think about future security issues
It will be particularly important for firms to examine the additional security issues that will be introduced in the coming years with broader adoption of technologies including VoIP (Voice over IP), according to the expert."The key is for people to start thinking ahead of these client-side vulnerabilities to understand what the next big thing may be. Things like VoIP need to be examined for their security implications," said Sarwate. "Many companies are already adopting these tools because of all the advantages they offer, but there will be many attacks carried out against these systems as well."Among the advice that SANS is offering organizations hoping to improve their client-side security coverage is to mandate secure configurations at installation time for all applications, to constantly verify patching and upgrading of both applications and system software, to scan for new vulnerabilities frequently, and to keep their security systems up to date.Other leading areas of concern highlighted by SANS in its report included critical vulnerabilities in Web applications that allow for cross-site scripting attacks or for computers to be otherwise compromised simply by pointing their browsers at poisoned URLs."Gullible, busy, accommodating computer users," including executives, IT staff, and others with privileged access also remain a major weak point for enterprise security, according to SANS, as these seemingly more seasoned users of computers and software are still falling for increasingly targeted spear-phishing campaigns in large numbers.One of the best ways to educate users about the problem is for organizations to create fake spear-phishing threats and send them out to internal users to determine which individuals might be most likely to fall for the schemes and follow up with additional training, the group said.Critical vulnerabilities in the software and systems that provide the operating environment and primary services to computer users, or server-side software, remain another area of leading concern, according to SANS.Problems in Microsoft Windows services, Unix and Mac OS services, back-up and AV programs, management servers, database software, and VoIP technologies in particular are proving troublesome, according to the report.Many of those issues can be addressed by following the same advice offered for solving client-side vulnerabilities, SANS said in the research. |
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Google launched a location service for mobile users on Wednesday that doesn't rely on GPS.Google Maps with My Location, currently in beta, locates users who don't have GPS-enabled phones based on their location to nearby cell towers. The result isn't as accurate as GPS but works for people who lack the positioning technology in their phones."It helps users speed up search by showing the general neighborhood they're in," said Steve Lee, product manager at Google for the service. Without the location service, users must type in their address or neighborhood in order to find nearby businesses using Google Maps.Google Maps with My Location will use GPS data to locate the user if the phone has the capability. But even for users of GPS-enabled phones, the cell location service might be useful, Lee said. That's because the cell tower feature works better indoors than GPS, it doesn't drain the phone battery as quickly and can bring up a result quicker, he said.The service could be useful to a person who might be traveling in an unfamiliar city and looking for restaurants or other businesses. A user pulls up Google Maps and hits the zero key on the phone. A blue dot will appear on the map in the user's location. If the service used GPS in the phone, the blue dot will be solid. If the service used cell towers to determine the location, the blue dot will have a halo around it, indicating that the location isn't precise. The user can then search for nearby businesses.Google says the cell tower technique will locate the user within about 1000 meters. It doesn't use triangulation, which calculates a user location based on the user's distance to three nearby towers. Instead, it essentially shows the range of the tower that the user's phone is connecting to.But the accuracy should improve as more people use the service, Lee said. That's because Google is keeping a database of location queries, minus any personal information like individual phone numbers or names. That will allow Google to learn more precise information about the range of each tower so that it can deliver a more accurate location area to users. The coverage area of cell towers can vary from about a quarter of a mile to several miles based on whether the tower is in an urban or rural area.For now, Google Maps with My Location doesn't feature any advertising, but it could in the future. "This product makes a lot of sense for advertising," Lee said.In order to use the service, phone owners must download a free application from Google. The application will work on BlackBerry, Windows Mobile, and Symbian phones as well as many phones that support Java. A few notable exceptions include the Samsung Blackjack, Moto Q, and Palm Treo 700W, which don't support the APIs Google requires to find cell towers, Lee said. |
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