Is your stitched macOS PDF unreadable by Adobe Acrobat? “Export to PDF” solves this.

A PDF I sent students was unreadable by a friend trying to read the file on Adobe Acrobat Reader n a desktop PC. This felt like a repeat of a problem I experienced in 2019 with macOS Catalina. And I had thought a Catalina update had fixed the error.

This time, on the Big Sur 11.3 Beta, the problem surfaced after I had stitched two PDF files in macOS Preview. The resulting PDF was not completely readable by Acrobat on either a PC or Mac. Page 5 of the 7 page document produced this error message:

AdobeAcrobaterror

A solution had been suggested for this new problem on this Adobe forum last year for macOS Mojave – when viewing the combined file in Preview, choose File > “Export as PDF” to generate a “true” PDF file. I tried this and indeed Acrobat could read all the pages. 

Looks like it accurate to say macOS Preview corrupts a stitched PDF – goodness! Good to know.

“Our Conservation Story: Andie Ang, Nor Lastrina & Kathy Xu” on Fri 19 Mar 2021: 8.00pm w/Biodiversity Friends Forum

I am looking forward to this chat with Andie Ang, Nor Lastrina and Kathy Xu, three stalwarts of the nature and environment community who have inspired us with their motivation, dedication and resilience. This will an opportunity to find out about the realities of conservation and advocacy.

I am also delighted to be able to co-host the session with Tan Yin Ling, who found the community in 2017 when the Biodiversity Friends Forum was initiated.

BFF 19 Mar 2021 Panel

Sign up via Eventbrite at http://tinyurl.com/bff19mar

“Tracking otters in Singapore: repositories, communities and communication,” Sivasothi aka Otterman (Wed 17 Mar 2021: 6.00pm – 7.00pm)

About the talk – “Urged to study a furry mammal in his beloved mangroves, Sivasothi aka Otterman began by unravelling the status of otters in Singapore and Malaysia. For this he tapped a network of archived books and journals, museum collections and veteran naturalists near and far, assisted by curators, librarians and scientists.

When otters first returned to Singapore, it was recreational coastal users who helped track otter dispersal. Two decades later, a network of otter-watchers now help him understand the behaviour, dispersal and travails of otters in urbanised Singapore. The stories, shared in social media posts and scientific publications help repay that debt of information provided so generously from around the world, three decades ago.”

Histories Otter Talk

About the speaker – “N. Sivasothi a.k.a. ‘Otterman’ was immersed in mangroves and wildlife for research, education and conservation at the National University of Singapore from the late 1980’s. He promotes public education, youth development and environmental stewardship in Singapore, and contributes to wildlife working groups and close-door engagements to mitigate development impact.”

Register on Eventbrite.

Histories by the National Library Singapore is a series which highlights research on historical and related matters in Singapore and the region, creating an appreciation of the role of humanities and social science research in contemporary society. For more talks, follow GoLibrary on Eventbrite.

World Wildlife Day 2021 “Forest and Livelihoods, Sustaining People and Planet”

The lovely art for World Wildlife Day, yesterday.

WWD 03mar2021

I marked the day with an animal behaviour lecture and ended it with a dialogue about conservation. Thanks to Jack & Rai who hosted a World Wildlife Day dialogue with Anbu (ACRES) and myself last Sunday night.

Screenshot 3158

I am curently reading “Giants of the Monsoon Forest: Living and Working with Elephants,” by by Jacob Shell. A geographer who read widely and travelled to visited a complex array of South Asian and Indochinese (prominently in Burma) peoples who work with elephants. Pushed to the mountains by historical waves of lowland conquests in the region, the geography led to an evolution of elephant working cultures.

giants of the monson forest

Shell sheds light on the co-dependency of elephant and man on forests, which are foraging and mating grounds for their elephants, and which suport the forest-based economies, logging and transport through seasonally flooded terrain. Roads, forest fragmentation and agriculture thereaten these areas but the dificul terrain is also the setting of some of the longest resistance wars which protect the forests.

I know very little about Southeast Asia, a tremedously complex region and the perspectives stitched together Jacob Shell, a geographer, are insightful.

Note: Marcus Chua shares what research reveals about Species Awareness Days tonight!

Video freeze whilst screen sharing in Zoom, on macOS Big Sur? Reinstall Zoom and enable “Use TCP connection for screen sharing”

Update – this note explains this will be resolved with the next Zoom for Mac update (after Ver 5.5.4). Thanks Kenneth Pinto!

My animal behaviour videos froze during the past two lectures. The problem first happened mid-lecture in mid-February which sure had me scrambling, as the short videos are integral to the lesson. This morning the freezing more polite surfaced during the pre-lecture video. I plan a short, relevant video as an AV check with students, and they reported the frozen video.

On both occasions, I was on my wired iMac with BigSur 11.2.2 and I switched to my wireless laptop on macOS Big Sur 11.3 beta and continued the lesson without a hitch [update: the problem was with wired macs]. A search revealed the solution: macOS Reddit user @portzebie was told by Zoom Support to i) uninstall and reinstall the Zoom desktop client, and then ii) go to Zoom preferences > Share Screen > Advanced options > enable “Use TCP connection for screen sharing”. Oh, and iii) restart your Mac!

Zoom  Enable TCP in Screen Sharing

This seems to have worked. Restart your Mac if all is not well at first.

I think tere are some other hiccups with Keynote (“Play” versus “Play in Window”) and with Zoom Screen sharing (enable “Optimise for Video Clip” or not) still. I shall sort that out before my next lecture.

But let me me restart that iMac first.

Zoom Optimise for Video Clip